[PATCH] MXS: Add device tree support and duckbill board support

[PATCH] MXS: Add device tree support and duckbill board support

[Sascha Hauer]

This series adds device tree support for MXS:

- Add device tree support for MXS specific drivers (debug UART, SD/MMC,
  OCOTP)
- Make sure SoC platform_devices are not registered when a device tree
  is present
- Add a pinctrl driver for MXS
- Turn GPIO support into a driver to make GPIO bindings via device tree
  possible

As a first user for the device tree support the I2SE duckbill board
is added.

Sascha

----------------------------------------------------------------
Sascha Hauer (15):
      ARM: MXS: Fix vddd brownout setting
      MXS: power-init: inline only once used functions
      ARM: MXS: Do not register devices with device tree support
      ARM: MXS: Make gpio a driver
      mci: mxs: Add devicetree support
      serial: stm_serial: Add devicetree support
      ARM: MXS: Create ocotp device in SoC code
      ARM: MXS: ocotp: Add devicetree support
      of: Create platform_device when creating AMBA device failed
      pbl: Add support for memory_display
      pinctrl: Add MXS pinctrl driver
      ARM: MXS: Setup vdda in power prep
      ARM: MXS: Add regulator debug print
      ARM: MXS: power-init: Add parameters to mx28_power_init()
      ARM: MXS: Add duckbill board support

 arch/arm/Kconfig                                 |   1 +
 arch/arm/boards/Makefile                         |   1 +
 arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   3 -
 arch/arm/boards/duckbill/Makefile                |   2 +
 arch/arm/boards/duckbill/board.c                 |  82 +++++++
 arch/arm/boards/duckbill/lowlevel.c              |  73 ++++++
 arch/arm/boards/freescale-mx28-evk/lowlevel.c    |   2 +-
 arch/arm/boards/freescale-mx28-evk/mx28-evk.c    |   2 -
 arch/arm/boards/karo-tx28/lowlevel.c             |   2 +-
 arch/arm/boards/karo-tx28/tx28-stk5.c            |   3 -
 arch/arm/configs/duckbill_defconfig              | 100 ++++++++
 arch/arm/dts/Makefile                            |   1 +
 arch/arm/dts/imx28-duckbill.dts                  |  15 ++
 arch/arm/mach-mxs/Kconfig                        |   8 +
 arch/arm/mach-mxs/include/mach/init.h            |   8 +-
 arch/arm/mach-mxs/iomux-imx.c                    |  60 -----
 arch/arm/mach-mxs/mem-init.c                     |  15 --
 arch/arm/mach-mxs/ocotp.c                        |   9 +
 arch/arm/mach-mxs/power-init.c                   | 277 +++++++++++++----------
 arch/arm/mach-mxs/soc-imx23.c                    |   6 +
 arch/arm/mach-mxs/soc-imx28.c                    |   9 +
 common/Makefile                                  |   1 +
 drivers/gpio/Kconfig                             |   3 +
 drivers/gpio/Makefile                            |   1 +
 drivers/gpio/gpio-mxs.c                          | 186 +++++++++++++++
 drivers/mci/mxs.c                                |  50 ++--
 drivers/of/platform.c                            |   4 +-
 drivers/pinctrl/Kconfig                          |   7 +
 drivers/pinctrl/Makefile                         |   1 +
 drivers/pinctrl/pinctrl-mxs.c                    | 171 ++++++++++++++
 drivers/serial/stm-serial.c                      |   9 +
 images/Makefile.mxs                              |  10 +
 pbl/console.c                                    |  10 +
 33 files changed, 899 insertions(+), 233 deletions(-)
 create mode 100644 arch/arm/boards/duckbill/Makefile
 create mode 100644 arch/arm/boards/duckbill/board.c
 create mode 100644 arch/arm/boards/duckbill/lowlevel.c
 create mode 100644 arch/arm/configs/duckbill_defconfig
 create mode 100644 arch/arm/dts/imx28-duckbill.dts
 create mode 100644 drivers/gpio/gpio-mxs.c
 create mode 100644 drivers/pinctrl/pinctrl-mxs.c

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[PATCH 01/15] ARM: MXS: Fix vddd brownout setting

[Sascha Hauer]

The brownout setting can be at maximum 7*25mV below the voltage
setting of the regulator. Set it to the minimum Voltage which is
1325mV.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-mxs/power-init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index 977c6e4..bc3d659 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -1177,7 +1177,7 @@ static void __mx23_power_init(int has_battery)
 	mxs_enable_output_rail_protection();
 
 	mxs_power_set_vddx(&mx23_vddio_cfg, 3300, 3150);
-	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1000);
+	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1325);
 	mxs_power_set_vddx(&mxs_vddmem_cfg, 2500, 1700);
 
 	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
@@ -1234,7 +1234,7 @@ static void __mx28_power_init(int has_battery)
 	mxs_enable_output_rail_protection();
 
 	mxs_power_set_vddx(&mx28_vddio_cfg, 3300, 3150);
-	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1000);
+	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1325);
 
 	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
 		POWER_CTRL_VDDIO_BO_IRQ | POWER_CTRL_VDD5V_DROOP_IRQ |
-- 
2.1.4


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[PATCH 02/15] MXS: power-init: inline only once used functions

[Sascha Hauer]

mxs_power_init_4p2_params and mxs_power_init_4p2_regulator are used
only once, so inline the code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-mxs/power-init.c | 158 +++++++++++++++++------------------------
 1 file changed, 65 insertions(+), 93 deletions(-)

diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index bc3d659..366b3f2 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -299,36 +299,6 @@ static void mxs_src_power_init(void)
 }
 
 /**
- * mxs_power_init_4p2_params() - Configure the parameters of the 4P2 regulator
- *
- * This function configures the necessary parameters for the 4P2 linear
- * regulator to supply the DC-DC converter from 5V input.
- */
-static void mxs_power_init_4p2_params(void)
-{
-	struct mxs_power_regs *power_regs =
-		(struct mxs_power_regs *)IMX_POWER_BASE;
-
-	/* Setup 4P2 parameters */
-	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
-		POWER_DCDC4P2_CMPTRIP_MASK | POWER_DCDC4P2_TRG_MASK,
-		POWER_DCDC4P2_TRG_4V2 | (31 << POWER_DCDC4P2_CMPTRIP_OFFSET));
-
-	clrsetbits_le32(&power_regs->hw_power_5vctrl,
-		POWER_5VCTRL_HEADROOM_ADJ_MASK,
-		0x4 << POWER_5VCTRL_HEADROOM_ADJ_OFFSET);
-
-	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
-		POWER_DCDC4P2_DROPOUT_CTRL_MASK,
-		POWER_DCDC4P2_DROPOUT_CTRL_100MV |
-		POWER_DCDC4P2_DROPOUT_CTRL_SRC_SEL);
-
-	clrsetbits_le32(&power_regs->hw_power_5vctrl,
-		POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
-		0x3f << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET);
-}
-
-/**
  * mxs_enable_4p2_dcdc_input() - Enable or disable the DCDC input from 4P2
  * @xfer:	Select if the input shall be enabled or disabled
  *
@@ -431,17 +401,78 @@ static void mxs_enable_4p2_dcdc_input(int xfer)
 }
 
 /**
- * mxs_power_init_4p2_regulator() - Start the 4P2 regulator
+ * mxs_power_init_dcdc_4p2_source() - Switch DC-DC converter to 4P2 source
+ *
+ * This function configures the DC-DC converter to be supplied from the 4P2
+ * linear regulator.
+ */
+static void mxs_power_init_dcdc_4p2_source(void)
+{
+	struct mxs_power_regs *power_regs =
+		(struct mxs_power_regs *)IMX_POWER_BASE;
+
+	if (!(readl(&power_regs->hw_power_dcdc4p2) &
+		POWER_DCDC4P2_ENABLE_DCDC)) {
+		hang();
+	}
+
+	mxs_enable_4p2_dcdc_input(1);
+
+	if (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) {
+		clrbits_le32(&power_regs->hw_power_dcdc4p2,
+			POWER_DCDC4P2_ENABLE_DCDC);
+		writel(POWER_5VCTRL_ENABLE_DCDC,
+			&power_regs->hw_power_5vctrl_clr);
+		charger_4p2_disable();
+	}
+}
+
+/**
+ * mxs_power_enable_4p2() - Power up the 4P2 regulator
  *
- * This function enables the 4P2 regulator and switches the DC-DC converter
- * to use the 4P2 input.
+ * This function drives the process of powering up the 4P2 linear regulator
+ * and switching the DC-DC converter input over to the 4P2 linear regulator.
  */
-static void mxs_power_init_4p2_regulator(void)
+static void mxs_power_enable_4p2(void)
 {
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
+	uint32_t vdddctrl, vddactrl, vddioctrl;
 	uint32_t tmp, tmp2;
 
+	vdddctrl = readl(&power_regs->hw_power_vdddctrl);
+	vddactrl = readl(&power_regs->hw_power_vddactrl);
+	vddioctrl = readl(&power_regs->hw_power_vddioctrl);
+
+	setbits_le32(&power_regs->hw_power_vdddctrl,
+		POWER_VDDDCTRL_DISABLE_FET | POWER_VDDDCTRL_ENABLE_LINREG |
+		POWER_VDDDCTRL_PWDN_BRNOUT);
+
+	setbits_le32(&power_regs->hw_power_vddactrl,
+		POWER_VDDACTRL_DISABLE_FET | POWER_VDDACTRL_ENABLE_LINREG |
+		POWER_VDDACTRL_PWDN_BRNOUT);
+
+	setbits_le32(&power_regs->hw_power_vddioctrl,
+		POWER_VDDIOCTRL_DISABLE_FET | POWER_VDDIOCTRL_PWDN_BRNOUT);
+
+	/* Setup 4P2 parameters */
+	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
+		POWER_DCDC4P2_CMPTRIP_MASK | POWER_DCDC4P2_TRG_MASK,
+		POWER_DCDC4P2_TRG_4V2 | (31 << POWER_DCDC4P2_CMPTRIP_OFFSET));
+
+	clrsetbits_le32(&power_regs->hw_power_5vctrl,
+		POWER_5VCTRL_HEADROOM_ADJ_MASK,
+		0x4 << POWER_5VCTRL_HEADROOM_ADJ_OFFSET);
+
+	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
+		POWER_DCDC4P2_DROPOUT_CTRL_MASK,
+		POWER_DCDC4P2_DROPOUT_CTRL_100MV |
+		POWER_DCDC4P2_DROPOUT_CTRL_SRC_SEL);
+
+	clrsetbits_le32(&power_regs->hw_power_5vctrl,
+		POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
+		0x3f << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET);
+
 	setbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_ENABLE_4P2);
 
 	writel(POWER_CHARGE_ENABLE_LOAD, &power_regs->hw_power_charge_set);
@@ -516,65 +547,6 @@ static void mxs_power_init_4p2_regulator(void)
 
 	clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_BO_MASK);
 	writel(POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr);
-}
-
-/**
- * mxs_power_init_dcdc_4p2_source() - Switch DC-DC converter to 4P2 source
- *
- * This function configures the DC-DC converter to be supplied from the 4P2
- * linear regulator.
- */
-static void mxs_power_init_dcdc_4p2_source(void)
-{
-	struct mxs_power_regs *power_regs =
-		(struct mxs_power_regs *)IMX_POWER_BASE;
-
-	if (!(readl(&power_regs->hw_power_dcdc4p2) &
-		POWER_DCDC4P2_ENABLE_DCDC)) {
-		hang();
-	}
-
-	mxs_enable_4p2_dcdc_input(1);
-
-	if (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) {
-		clrbits_le32(&power_regs->hw_power_dcdc4p2,
-			POWER_DCDC4P2_ENABLE_DCDC);
-		writel(POWER_5VCTRL_ENABLE_DCDC,
-			&power_regs->hw_power_5vctrl_clr);
-		charger_4p2_disable();
-	}
-}
-
-/**
- * mxs_power_enable_4p2() - Power up the 4P2 regulator
- *
- * This function drives the process of powering up the 4P2 linear regulator
- * and switching the DC-DC converter input over to the 4P2 linear regulator.
- */
-static void mxs_power_enable_4p2(void)
-{
-	struct mxs_power_regs *power_regs =
-		(struct mxs_power_regs *)IMX_POWER_BASE;
-	uint32_t vdddctrl, vddactrl, vddioctrl;
-	uint32_t tmp;
-
-	vdddctrl = readl(&power_regs->hw_power_vdddctrl);
-	vddactrl = readl(&power_regs->hw_power_vddactrl);
-	vddioctrl = readl(&power_regs->hw_power_vddioctrl);
-
-	setbits_le32(&power_regs->hw_power_vdddctrl,
-		POWER_VDDDCTRL_DISABLE_FET | POWER_VDDDCTRL_ENABLE_LINREG |
-		POWER_VDDDCTRL_PWDN_BRNOUT);
-
-	setbits_le32(&power_regs->hw_power_vddactrl,
-		POWER_VDDACTRL_DISABLE_FET | POWER_VDDACTRL_ENABLE_LINREG |
-		POWER_VDDACTRL_PWDN_BRNOUT);
-
-	setbits_le32(&power_regs->hw_power_vddioctrl,
-		POWER_VDDIOCTRL_DISABLE_FET | POWER_VDDIOCTRL_PWDN_BRNOUT);
-
-	mxs_power_init_4p2_params();
-	mxs_power_init_4p2_regulator();
 
 	/* Shutdown battery (none present) */
 	if (!mxs_is_batt_ready()) {
-- 
2.1.4


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[PATCH 03/15] ARM: MXS: Do not register devices with device tree support

[Sascha Hauer]

When a device tree is present the SoC internal devices come from
it, so do not register them as platform devices.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-mxs/soc-imx23.c | 3 +++
 arch/arm/mach-mxs/soc-imx28.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/arch/arm/mach-mxs/soc-imx23.c b/arch/arm/mach-mxs/soc-imx23.c
index b219865..ece91e5 100644
--- a/arch/arm/mach-mxs/soc-imx23.c
+++ b/arch/arm/mach-mxs/soc-imx23.c
@@ -38,6 +38,9 @@ EXPORT_SYMBOL(reset_cpu);
 
 static int imx23_devices_init(void)
 {
+	if (of_get_root_node())
+		return 0;
+
 	add_generic_device("imx23-dma-apbh", 0, NULL, MXS_APBH_BASE, 0x2000, IORESOURCE_MEM, NULL);
 	add_generic_device("imx23-clkctrl", 0, NULL, IMX_CCM_BASE, 0x100, IORESOURCE_MEM, NULL);
 
diff --git a/arch/arm/mach-mxs/soc-imx28.c b/arch/arm/mach-mxs/soc-imx28.c
index c7252f5..001c969 100644
--- a/arch/arm/mach-mxs/soc-imx28.c
+++ b/arch/arm/mach-mxs/soc-imx28.c
@@ -56,6 +56,9 @@ postcore_initcall(imx28_init);
 
 static int imx28_devices_init(void)
 {
+	if (of_get_root_node())
+		return 0;
+
 	add_generic_device("imx28-dma-apbh", 0, NULL, MXS_APBH_BASE, 0x2000, IORESOURCE_MEM, NULL);
 	add_generic_device("imx28-clkctrl", 0, NULL, IMX_CCM_BASE, 0x100, IORESOURCE_MEM, NULL);
 
-- 
2.1.4


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[PATCH 04/15] ARM: MXS: Make gpio a driver

[Sascha Hauer]

This turns the MXS gpio support into a driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/Kconfig              |   1 +
 arch/arm/mach-mxs/iomux-imx.c |  60 --------------
 arch/arm/mach-mxs/soc-imx23.c |   3 +
 arch/arm/mach-mxs/soc-imx28.c |   5 ++
 drivers/gpio/Kconfig          |   3 +
 drivers/gpio/Makefile         |   1 +
 drivers/gpio/gpio-mxs.c       | 186 ++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 199 insertions(+), 60 deletions(-)
 create mode 100644 drivers/gpio/gpio-mxs.c

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 09bbe05..f682803 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -120,6 +120,7 @@ config ARCH_MVEBU
 
 config ARCH_MXS
 	bool "Freescale i.MX23/28 (mxs) based"
+	select GPIOLIB
 	select GENERIC_GPIO
 	select COMMON_CLK
 	select CLKDEV_LOOKUP
diff --git a/arch/arm/mach-mxs/iomux-imx.c b/arch/arm/mach-mxs/iomux-imx.c
index 84c6ca4..68a4e3c 100644
--- a/arch/arm/mach-mxs/iomux-imx.c
+++ b/arch/arm/mach-mxs/iomux-imx.c
@@ -75,12 +75,6 @@ static unsigned calc_output_reg(unsigned no)
 	return  ((no >> 5) << 4) + HW_PINCTRL_DOUT0;
 }
 
-static unsigned calc_input_reg(unsigned no)
-{
-	/* each register controls 32 pads */
-	return  ((no >> 5) << 4) + HW_PINCTRL_DIN0;
-}
-
 /**
  * @param[in] m One pin define per call from iomux-mx23.h/iomux-mx28.h
  */
@@ -168,57 +162,3 @@ void imx_gpio_mode(uint32_t m)
 		}
 	}
 }
-
-int gpio_direction_input(unsigned gpio)
-{
-	unsigned reg_offset;
-
-	if (gpio > MAX_GPIO_NO)
-		return -EINVAL;
-
-	reg_offset = calc_output_enable_reg(gpio);
-	writel(0x1 << (gpio % 32), IMX_IOMUXC_BASE + reg_offset + STMP_OFFSET_REG_CLR);
-
-	return 0;
-}
-
-int gpio_direction_output(unsigned gpio, int val)
-{
-	unsigned reg_offset;
-
-	if (gpio > MAX_GPIO_NO)
-		return -EINVAL;
-
-	/* first set the output value... */
-	reg_offset = calc_output_reg(gpio);
-	writel(0x1 << (gpio % 32), IMX_IOMUXC_BASE +
-		reg_offset + (val != 0 ? STMP_OFFSET_REG_SET : STMP_OFFSET_REG_CLR));
-	/* ...then the direction */
-	reg_offset = calc_output_enable_reg(gpio);
-	writel(0x1 << (gpio % 32), IMX_IOMUXC_BASE + reg_offset + STMP_OFFSET_REG_SET);
-
-	return 0;
-}
-
-void gpio_set_value(unsigned gpio, int val)
-{
-	unsigned reg_offset;
-
-	reg_offset = calc_output_reg(gpio);
-	writel(0x1 << (gpio % 32), IMX_IOMUXC_BASE +
-				reg_offset + (val != 0 ?
-					STMP_OFFSET_REG_SET : STMP_OFFSET_REG_CLR));
-}
-
-int gpio_get_value(unsigned gpio)
-{
-	uint32_t reg;
-	unsigned reg_offset;
-
-	reg_offset = calc_input_reg(gpio);
-	reg = readl(IMX_IOMUXC_BASE + reg_offset);
-	if (reg & (0x1 << (gpio % 32)))
-		return 1;
-
-	return 0;
-}
diff --git a/arch/arm/mach-mxs/soc-imx23.c b/arch/arm/mach-mxs/soc-imx23.c
index ece91e5..339c577 100644
--- a/arch/arm/mach-mxs/soc-imx23.c
+++ b/arch/arm/mach-mxs/soc-imx23.c
@@ -43,6 +43,9 @@ static int imx23_devices_init(void)
 
 	add_generic_device("imx23-dma-apbh", 0, NULL, MXS_APBH_BASE, 0x2000, IORESOURCE_MEM, NULL);
 	add_generic_device("imx23-clkctrl", 0, NULL, IMX_CCM_BASE, 0x100, IORESOURCE_MEM, NULL);
+	add_generic_device("imx23-gpio", 0, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
+	add_generic_device("imx23-gpio", 1, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
+	add_generic_device("imx23-gpio", 2, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
 
 	return 0;
 }
diff --git a/arch/arm/mach-mxs/soc-imx28.c b/arch/arm/mach-mxs/soc-imx28.c
index 001c969..4f0d895 100644
--- a/arch/arm/mach-mxs/soc-imx28.c
+++ b/arch/arm/mach-mxs/soc-imx28.c
@@ -61,6 +61,11 @@ static int imx28_devices_init(void)
 
 	add_generic_device("imx28-dma-apbh", 0, NULL, MXS_APBH_BASE, 0x2000, IORESOURCE_MEM, NULL);
 	add_generic_device("imx28-clkctrl", 0, NULL, IMX_CCM_BASE, 0x100, IORESOURCE_MEM, NULL);
+	add_generic_device("imx28-gpio", 0, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
+	add_generic_device("imx28-gpio", 1, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
+	add_generic_device("imx28-gpio", 2, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
+	add_generic_device("imx28-gpio", 3, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
+	add_generic_device("imx28-gpio", 4, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
 
 	return 0;
 }
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 0ca7df4..c8b1efb 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -41,6 +41,9 @@ config GPIO_GENERIC_PLATFORM
 config GPIO_IMX
 	def_bool ARCH_IMX
 
+config GPIO_MXS
+	def_bool ARCH_MXS
+
 config GPIO_JZ4740
 	bool "GPIO support for Ingenic SoCs"
 	depends on MACH_MIPS_XBURST
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 510d146..508e228 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
 obj-$(CONFIG_GPIO_DIGIC)	+= gpio-digic.o
 obj-$(CONFIG_GPIO_GENERIC)	+= gpio-generic.o
 obj-$(CONFIG_GPIO_IMX)		+= gpio-imx.o
+obj-$(CONFIG_GPIO_MXS)		+= gpio-mxs.o
 obj-$(CONFIG_GPIO_JZ4740)	+= gpio-jz4740.o
 obj-$(CONFIG_GPIO_MALTA_FPGA_I2C) += gpio-malta-fpga-i2c.o
 obj-$(CONFIG_GPIO_ORION)	+= gpio-orion.o
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
new file mode 100644
index 0000000..30f9589
--- /dev/null
+++ b/drivers/gpio/gpio-mxs.c
@@ -0,0 +1,186 @@
+/*
+ * Freescale MXS gpio support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <io.h>
+#include <of.h>
+#include <gpio.h>
+#include <init.h>
+#include <stmp-device.h>
+#include <linux/err.h>
+
+struct mxs_gpio_chip {
+	void __iomem *base;
+	void __iomem *din;
+	void __iomem *doe;
+	void __iomem *dout;
+	struct gpio_chip chip;
+	struct mxs_gpio_regs *regs;
+};
+
+struct mxs_gpio_regs {
+	unsigned int din;
+	unsigned int doe;
+	unsigned int dout;
+};
+
+static struct mxs_gpio_regs regs_mxs23 = {
+	.din = 0x0600,
+	.dout = 0x0500,
+	.doe = 0x0700,
+};
+
+static struct mxs_gpio_regs regs_mxs28 = {
+	.din = 0x0900,
+	.dout = 0x0700,
+	.doe = 0x0b00,
+};
+
+static void mxs_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
+{
+	struct mxs_gpio_chip *mxsgpio = container_of(chip, struct mxs_gpio_chip, chip);
+
+	if (value)
+		writel(0x1 << gpio, mxsgpio->dout + STMP_OFFSET_REG_SET);
+	else
+		writel(0x1 << gpio, mxsgpio->dout + STMP_OFFSET_REG_CLR);
+}
+
+static int mxs_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+	struct mxs_gpio_chip *mxsgpio = container_of(chip, struct mxs_gpio_chip, chip);
+
+	writel(0x1 << gpio, mxsgpio->doe + STMP_OFFSET_REG_CLR);
+
+	return 0;
+}
+
+
+static int mxs_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value)
+{
+	struct mxs_gpio_chip *mxsgpio = container_of(chip, struct mxs_gpio_chip, chip);
+
+	mxs_gpio_set_value(chip, gpio, value);
+	writel(0x1 << gpio, mxsgpio->doe + STMP_OFFSET_REG_SET);
+
+	return 0;
+}
+
+static int mxs_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+	struct mxs_gpio_chip *mxsgpio = container_of(chip, struct mxs_gpio_chip, chip);
+
+	if (readl(mxsgpio->din) & (1 << gpio))
+		return 1;
+	else
+		return 0;
+}
+
+static int mxs_get_direction(struct gpio_chip *chip, unsigned gpio)
+{
+	struct mxs_gpio_chip *mxsgpio = container_of(chip, struct mxs_gpio_chip, chip);
+
+	if (readl(mxsgpio->doe) & (1 << gpio))
+		return GPIOF_DIR_OUT;
+	else
+		return GPIOF_DIR_IN;
+}
+
+static struct gpio_ops mxs_gpio_ops = {
+	.direction_input = mxs_gpio_direction_input,
+	.direction_output = mxs_gpio_direction_output,
+	.get = mxs_gpio_get_value,
+	.set = mxs_gpio_set_value,
+	.get_direction = mxs_get_direction,
+};
+
+static int mxs_gpio_probe(struct device_d *dev)
+{
+	struct mxs_gpio_chip *mxsgpio;
+	struct mxs_gpio_regs *regs;
+	int ret, id;
+
+	ret = dev_get_drvdata(dev, (unsigned long *)&regs);
+	if (ret)
+		return ret;
+
+	mxsgpio = xzalloc(sizeof(*mxsgpio));
+	mxsgpio->chip.ops = &mxs_gpio_ops;
+	if (dev->id < 0) {
+		id = of_alias_get_id(dev->device_node, "gpio");
+		if (id < 0)
+			return id;
+		mxsgpio->base = dev_get_mem_region(dev->parent, 0);
+		mxsgpio->chip.base = id * 32;
+	} else {
+		id = dev->id;
+		mxsgpio->base = dev_get_mem_region(dev, 0);
+		mxsgpio->chip.base = dev->id * 32;
+	}
+
+	if (IS_ERR(mxsgpio->base))
+		return PTR_ERR(mxsgpio->base);
+
+	mxsgpio->doe = mxsgpio->base + regs->doe + id * 0x10;
+	mxsgpio->dout = mxsgpio->base + regs->dout + id * 0x10;
+	mxsgpio->din = mxsgpio->base + regs->din + id * 0x10;
+
+	mxsgpio->chip.ngpio = 32;
+	mxsgpio->chip.dev = dev;
+	mxsgpio->regs = regs;
+	gpiochip_add(&mxsgpio->chip);
+
+	dev_dbg(dev, "probed gpiochip%d with base %d\n", dev->id, mxsgpio->chip.base);
+
+	return 0;
+}
+
+static __maybe_unused struct of_device_id mxs_gpio_dt_ids[] = {
+	{
+		.compatible = "fsl,imx23-gpio",
+		.data = (unsigned long)&regs_mxs23,
+	}, {
+		.compatible = "fsl,imx28-gpio",
+		.data = (unsigned long)&regs_mxs28,
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct platform_device_id mxs_gpio_ids[] = {
+	{
+		.name = "imx23-gpio",
+		.driver_data = (unsigned long)&regs_mxs23,
+	}, {
+		.name = "imx28-gpio",
+		.driver_data = (unsigned long)&regs_mxs28,
+	}, {
+		/* sentinel */
+	},
+};
+
+static struct driver_d mxs_gpio_driver = {
+	.name = "gpio-mxs",
+	.probe = mxs_gpio_probe,
+	.of_compatible = DRV_OF_COMPAT(mxs_gpio_dt_ids),
+	.id_table = mxs_gpio_ids,
+};
+
+static int mxs_gpio_add(void)
+{
+	platform_driver_register(&mxs_gpio_driver);
+	return 0;
+}
+core_initcall(mxs_gpio_add);
-- 
2.1.4


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[PATCH 05/15] mci: mxs: Add devicetree support

[Sascha Hauer]

Add device tree compatibles and allow retrieving data from device tree
instead of platform_data only.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mci/mxs.c | 50 +++++++++++++++++++++++++++-----------------------
 1 file changed, 27 insertions(+), 23 deletions(-)

diff --git a/drivers/mci/mxs.c b/drivers/mci/mxs.c
index 367964c..b36fb13 100644
--- a/drivers/mci/mxs.c
+++ b/drivers/mci/mxs.c
@@ -549,11 +549,6 @@ static int mxs_mci_probe(struct device_d *hw_dev)
 	struct mci_host *host;
 	unsigned long rate;
 
-	if (hw_dev->platform_data == NULL) {
-		dev_err(hw_dev, "Missing platform data\n");
-		return -EINVAL;
-	}
-
 	mxs_mci = xzalloc(sizeof(*mxs_mci));
 	host = &mxs_mci->host;
 
@@ -567,9 +562,16 @@ static int mxs_mci_probe(struct device_d *hw_dev)
 		return PTR_ERR(mxs_mci->regs);
 
 	/* feed forward the platform specific values */
-	host->voltages = pd->voltages;
-	host->host_caps = pd->caps;
-	host->devname = pd->devname;
+	if (pd) {
+		host->voltages = pd->voltages;
+		host->host_caps = pd->caps;
+		host->devname = pd->devname;
+		host->f_min = pd->f_min;
+		host->f_max =  pd->f_max;
+	} else {
+		host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34,	/* fixed to 3.3 V */
+		mci_of_parse(host);
+	}
 
 	mxs_mci->clk = clk_get(hw_dev, NULL);
 	if (IS_ERR(mxs_mci->clk))
@@ -579,22 +581,13 @@ static int mxs_mci_probe(struct device_d *hw_dev)
 
 	rate = clk_get_rate(mxs_mci->clk);
 
-	if (pd->f_min == 0) {
-		host->f_min = rate / 254 / 256;
-		dev_dbg(hw_dev, "Min. frequency is %u Hz\n", host->f_min);
-	} else {
-		host->f_min = pd->f_min;
-		dev_dbg(hw_dev, "Min. frequency is %u Hz, could be %lu Hz\n",
-			host->f_min, rate / 254 / 256);
-	}
-	if (pd->f_max == 0) {
+	if (host->f_min < 400000)
+		host->f_min = 400000;
+	if (host->f_max == 0)
 		host->f_max = rate / 2 / 1;
-		dev_dbg(hw_dev, "Max. frequency is %u Hz\n", host->f_max);
-	} else {
-		host->f_max =  pd->f_max;
-		dev_dbg(hw_dev, "Max. frequency is %u Hz, could be %lu Hz\n",
-			host->f_max, rate / 2 / 1);
-	}
+
+	dev_dbg(hw_dev, "Max. frequency is %u Hz\n", host->f_max);
+	dev_dbg(hw_dev, "Min. frequency is %u Hz\n", host->f_min);
 
 	if (IS_ENABLED(CONFIG_MCI_INFO)) {
 		mxs_mci->f_min = host->f_min;
@@ -605,8 +598,19 @@ static int mxs_mci_probe(struct device_d *hw_dev)
 	return mci_register(host);
 }
 
+static __maybe_unused struct of_device_id mxs_mmc_compatible[] = {
+	{
+		.compatible = "fsl,imx23-mmc",
+	}, {
+		.compatible = "fsl,imx28-mmc",
+	}, {
+		/* sentinel */
+	}
+};
+
 static struct driver_d mxs_mci_driver = {
         .name  = "mxs_mci",
         .probe = mxs_mci_probe,
+	.of_compatible = DRV_OF_COMPAT(mxs_mmc_compatible),
 };
 device_platform_driver(mxs_mci_driver);
-- 
2.1.4


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[PATCH 06/15] serial: stm_serial: Add devicetree support

[Sascha Hauer]

This adds device tree support for the stm serial driver. This
driver really is a AMBA primecell, so the amba-pl011 could be
used. However, the current code tries to get the apb_pclk before
the clocks are registered, so this does not work. Use the stm
driver instead until a solution is found.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/serial/stm-serial.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/serial/stm-serial.c b/drivers/serial/stm-serial.c
index e5f57dc..8bb242b 100644
--- a/drivers/serial/stm-serial.c
+++ b/drivers/serial/stm-serial.c
@@ -189,9 +189,18 @@ static void stm_serial_remove(struct device_d *dev)
 	free(priv);
 }
 
+static __maybe_unused struct of_device_id stm_serial_dt_ids[] = {
+	{
+		.compatible = "arm,pl011",
+	}, {
+		/* sentinel */
+	}
+};
+
 static struct driver_d stm_serial_driver = {
         .name   = "stm_serial",
         .probe  = stm_serial_probe,
 	.remove = stm_serial_remove,
+	.of_compatible = DRV_OF_COMPAT(stm_serial_dt_ids),
 };
 console_platform_driver(stm_serial_driver);
-- 
2.1.4


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[PATCH 07/15] ARM: MXS: Create ocotp device in SoC code

[Sascha Hauer]

The ocotp device is completely SoC internal, no need to register
it from boards. Register it from SoC code instead.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/boards/crystalfontz-cfa10036/cfa10036.c | 3 ---
 arch/arm/boards/freescale-mx28-evk/mx28-evk.c    | 2 --
 arch/arm/boards/karo-tx28/tx28-stk5.c            | 3 ---
 arch/arm/mach-mxs/soc-imx28.c                    | 1 +
 4 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
index 1412eff..6e83570 100644
--- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
+++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
@@ -127,9 +127,6 @@ static int cfa10036_devices_init(void)
 	add_generic_device("mxs_mci", 0, NULL, IMX_SSP0_BASE, SZ_8K,
 			   IORESOURCE_MEM, &mci_pdata);
 
-	add_generic_device("ocotp", 0, NULL, IMX_OCOTP_BASE, SZ_8K,
-			   IORESOURCE_MEM, NULL);
-
 	i2c_register_board_info(0, cfa10036_i2c_devices, ARRAY_SIZE(cfa10036_i2c_devices));
 	add_generic_device_res("i2c-gpio", 0, NULL, 0, &i2c_gpio_pdata);
 
diff --git a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
index dce6d31..d77a6c7 100644
--- a/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
+++ b/arch/arm/boards/freescale-mx28-evk/mx28-evk.c
@@ -275,8 +275,6 @@ static int mx28_evk_devices_init(void)
 	add_generic_device("stmfb", 0, NULL, IMX_FB_BASE, 0x2000,
 			   IORESOURCE_MEM, &mx28_evk_fb_pdata);
 
-	add_generic_device("ocotp", 0, NULL, IMX_OCOTP_BASE, 0x2000,
-			IORESOURCE_MEM, NULL);
 	mx28_evk_get_ethaddr(); /* must be after registering ocotp */
 
 	mx28_evk_fec_reset();
diff --git a/arch/arm/boards/karo-tx28/tx28-stk5.c b/arch/arm/boards/karo-tx28/tx28-stk5.c
index c4c5109..9b86d1c 100644
--- a/arch/arm/boards/karo-tx28/tx28-stk5.c
+++ b/arch/arm/boards/karo-tx28/tx28-stk5.c
@@ -382,9 +382,6 @@ void base_board_init(void)
 	add_generic_device("stmfb", 0, NULL, IMX_FB_BASE, 0x2000,
 			   IORESOURCE_MEM, &tx28_fb_pdata);
 
-	add_generic_device("ocotp", 0, NULL, IMX_OCOTP_BASE, 0x2000,
-			   IORESOURCE_MEM, NULL);
-
 	tx28_get_ethaddr();
 
 	add_generic_device("imx28-fec", 0, NULL, IMX_FEC0_BASE, 0x4000,
diff --git a/arch/arm/mach-mxs/soc-imx28.c b/arch/arm/mach-mxs/soc-imx28.c
index 4f0d895..b4ec38d 100644
--- a/arch/arm/mach-mxs/soc-imx28.c
+++ b/arch/arm/mach-mxs/soc-imx28.c
@@ -66,6 +66,7 @@ static int imx28_devices_init(void)
 	add_generic_device("imx28-gpio", 2, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
 	add_generic_device("imx28-gpio", 3, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
 	add_generic_device("imx28-gpio", 4, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
+	add_generic_device("ocotp", 0, NULL, IMX_OCOTP_BASE, 0x2000, IORESOURCE_MEM, NULL);
 
 	return 0;
 }
-- 
2.1.4


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[PATCH 08/15] ARM: MXS: ocotp: Add devicetree support

[Sascha Hauer]

Add the device tree compatible strings.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-mxs/ocotp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/mach-mxs/ocotp.c b/arch/arm/mach-mxs/ocotp.c
index abdd445..2029b90 100644
--- a/arch/arm/mach-mxs/ocotp.c
+++ b/arch/arm/mach-mxs/ocotp.c
@@ -207,9 +207,18 @@ static int mxs_ocotp_probe(struct device_d *dev)
 	return 0;
 }
 
+static __maybe_unused struct of_device_id mxs_ocotp_compatible[] = {
+	{
+		.compatible = "fsl,ocotp",
+	}, {
+		/* sentinel */
+	}
+};
+
 static struct driver_d mxs_ocotp_driver = {
 	.name	= DRIVERNAME,
 	.probe	= mxs_ocotp_probe,
+	.of_compatible = DRV_OF_COMPAT(mxs_ocotp_compatible),
 };
 
 static int mxs_ocotp_init(void)
-- 
2.1.4


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[PATCH 09/15] of: Create platform_device when creating AMBA device failed

[Sascha Hauer]

If creating an AMBA device failed, maybe because AMBA support is
not compiled in, register the device as regular platform device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/of/platform.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 92ef534..ab3ccab 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -312,8 +312,8 @@ static int of_platform_bus_create(struct device_node *bus,
 	}
 
 	if (of_device_is_compatible(bus, "arm,primecell")) {
-		of_amba_device_create(bus);
-		return 0;
+		if (of_amba_device_create(bus))
+			return 0;
 	}
 
 	dev = of_platform_device_create(bus, parent);
-- 
2.1.4


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[PATCH 10/15] pbl: Add support for memory_display

[Sascha Hauer]

The PBL has console support now, so add memory_display support aswell
which can be a good debugging aid.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 common/Makefile |  1 +
 pbl/console.c   | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/common/Makefile b/common/Makefile
index 282ddbc..ee5dca7 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -1,5 +1,6 @@
 obj-y				+= memory.o
 obj-y				+= memory_display.o
+pbl-$(CONFIG_PBL_CONSOLE)	+= memory_display.o
 obj-y				+= clock.o
 obj-y				+= console_common.o
 obj-y				+= startup.o
diff --git a/pbl/console.c b/pbl/console.c
index 3875e2a..a9859ad 100644
--- a/pbl/console.c
+++ b/pbl/console.c
@@ -30,3 +30,13 @@ int pr_print(int level, const char *fmt, ...)
 
 	return i;
 }
+
+int ctrlc(void)
+{
+	return 0;
+}
+
+void console_putc(unsigned int ch, char c)
+{
+	putc_ll(c);
+}
-- 
2.1.4


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[PATCH 11/15] pinctrl: Add MXS pinctrl driver

[Sascha Hauer]

This adds a device tree pinctrl driver for MXS.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/pinctrl/Kconfig       |   7 ++
 drivers/pinctrl/Makefile      |   1 +
 drivers/pinctrl/pinctrl-mxs.c | 171 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 179 insertions(+)
 create mode 100644 drivers/pinctrl/pinctrl-mxs.c

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 4cbc167..5c69928 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -37,6 +37,13 @@ comment "OFDEVICE is not enabled."
 comment "Without device tree support PINCTRL won't do anything"
 endif
 
+config PINCTRL_MXS
+	bool "MXS pinctrl"
+	depends on ARCH_MXS
+	default ARCH_MXS
+	help
+	  This pinmux controller is found on i.MX23,28
+
 config PINCTRL_ROCKCHIP
 	select GPIO_GENERIC
 	select MFD_SYSCON
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 724e6d7..af9b30d 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_IMX_IOMUX_V1) += imx-iomux-v1.o
 obj-$(CONFIG_PINCTRL_IMX_IOMUX_V2) += imx-iomux-v2.o
 obj-$(CONFIG_PINCTRL_IMX_IOMUX_V3) += imx-iomux-v3.o
+obj-$(CONFIG_PINCTRL_MXS) += pinctrl-mxs.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o
 obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o
 obj-$(CONFIG_PINCTRL_TEGRA20) += pinctrl-tegra20.o
diff --git a/drivers/pinctrl/pinctrl-mxs.c b/drivers/pinctrl/pinctrl-mxs.c
new file mode 100644
index 0000000..ec0aaec
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-mxs.c
@@ -0,0 +1,171 @@
+/*
+ * pinctrl-mxs.c - MXS pinctrl support
+ *
+ * Copyright (c) 2015 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <io.h>
+#include <of.h>
+#include <pinctrl.h>
+#include <malloc.h>
+#include <stmp-device.h>
+
+struct mxs_pinctrl {
+	void __iomem *base;
+	struct pinctrl_device pinctrl;
+};
+
+#define PINID(bank, pin)	((bank) * 32 + (pin))
+#define MUXID_TO_PINID(m)	PINID((m) >> 12 & 0xf, (m) >> 4 & 0xff)
+#define MUXID_TO_MUXSEL(m)	((m) & 0xf)
+#define PINID_TO_BANK(p)	((p) >> 5)
+#define PINID_TO_PIN(p)		((p) % 32)
+
+static int mxs_pinctrl_set_state(struct pinctrl_device *pdev, struct device_node *np)
+{
+	struct mxs_pinctrl *iomux = container_of(pdev, struct mxs_pinctrl, pinctrl);
+	const __be32 *list;
+	int npins, size, i;
+	u32 val, ma, vol, pull;
+	int ret;
+	int ma_present = 0, vol_present = 0, pull_present = 0;
+
+	dev_dbg(iomux->pinctrl.dev, "set state: %s\n", np->full_name);
+
+	list = of_get_property(np, "fsl,pinmux-ids", &size);
+	if (!list)
+		return -EINVAL;
+
+	if (!size || size % 4) {
+		dev_err(iomux->pinctrl.dev, "Invalid fsl,pins property in %s\n",
+				np->full_name);
+		return -EINVAL;
+	}
+
+	npins = size / 4;
+
+	ret = of_property_read_u32(np, "fsl,drive-strength", &ma);
+	if (!ret)
+		ma_present = 1;
+
+	ret = of_property_read_u32(np, "fsl,voltage", &vol);
+	if (!ret)
+		vol_present = 1;
+
+	ret = of_property_read_u32(np, "fsl,pull-up", &pull);
+	if (!ret)
+		pull_present = 1;
+
+	for (i = 0; i < npins; i++) {
+		int muxsel, pinid, bank, pin, shift;
+		void __iomem *reg;
+
+		val = be32_to_cpu(*list++);
+
+		muxsel = MUXID_TO_MUXSEL(val);
+		pinid = MUXID_TO_PINID(val);
+
+		bank = PINID_TO_BANK(pinid);
+		pin = PINID_TO_PIN(pinid);
+		reg = iomux->base + 0x100;
+		reg += bank * 0x20 + pin / 16 * 0x10;
+		shift = pin % 16 * 2;
+
+		writel(0x3 << shift, reg + STMP_OFFSET_REG_CLR);
+		writel(muxsel << shift, reg + STMP_OFFSET_REG_SET);
+
+		dev_dbg(iomux->pinctrl.dev, "pin %d, mux %d, ma: %d, vol: %d, pull: %d\n",
+				pinid, muxsel, ma, vol, pull);
+
+		/* drive */
+		reg = iomux->base + 0x300;
+		reg += bank * 0x40 + pin / 8 * 0x10;
+
+		/* mA */
+		if (ma_present) {
+			shift = pin % 8 * 4;
+			writel(0x3 << shift, reg + STMP_OFFSET_REG_CLR);
+			writel(ma << shift, reg + STMP_OFFSET_REG_SET);
+		}
+
+		/* vol */
+		if (vol_present) {
+			shift = pin % 8 * 4 + 2;
+			if (vol)
+				writel(1 << shift, reg + STMP_OFFSET_REG_SET);
+			else
+				writel(1 << shift, reg + STMP_OFFSET_REG_CLR);
+		}
+
+		/* pull */
+		if (pull_present) {
+			reg = iomux->base + 0x600;
+			reg += bank * 0x10;
+			shift = pin;
+			if (pull)
+				writel(1 << shift, reg + STMP_OFFSET_REG_SET);
+			else
+				writel(1 << shift, reg + STMP_OFFSET_REG_CLR);
+		}
+	}
+
+	return 0;
+}
+
+static struct pinctrl_ops mxs_pinctrl_ops = {
+	.set_state = mxs_pinctrl_set_state,
+};
+
+static int mxs_pinctrl_probe(struct device_d *dev)
+{
+	struct mxs_pinctrl *iomux;
+	int ret = 0;
+
+	iomux = xzalloc(sizeof(*iomux));
+
+	iomux->base = dev_get_mem_region(dev, 0);
+
+	iomux->pinctrl.dev = dev;
+	iomux->pinctrl.ops = &mxs_pinctrl_ops;
+
+	ret = pinctrl_register(&iomux->pinctrl);
+	if (ret)
+		free(iomux);
+
+	return ret;
+}
+
+static __maybe_unused struct of_device_id mxs_pinctrl_dt_ids[] = {
+	{
+		.compatible = "fsl,imx28-pinctrl",
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct driver_d mxs_pinctrl_driver = {
+	.name		= "mxs-pinctrl",
+	.probe		= mxs_pinctrl_probe,
+	.of_compatible	= DRV_OF_COMPAT(mxs_pinctrl_dt_ids),
+};
+
+static int mxs_pinctrl_init(void)
+{
+	return platform_driver_register(&mxs_pinctrl_driver);
+}
+postcore_initcall(mxs_pinctrl_init);
-- 
2.1.4


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[PATCH 12/15] ARM: MXS: Setup vdda in power prep

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-mxs/mem-init.c   | 15 ---------------
 arch/arm/mach-mxs/power-init.c | 15 +++++++++++++++
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/arch/arm/mach-mxs/mem-init.c b/arch/arm/mach-mxs/mem-init.c
index 9773f94..43165ac 100644
--- a/arch/arm/mach-mxs/mem-init.c
+++ b/arch/arm/mach-mxs/mem-init.c
@@ -255,17 +255,6 @@ void mxs_mem_setup_cpu_and_hbus(void)
 	mxs_early_delay(15000);
 }
 
-void mxs_mem_setup_vdda(void)
-{
-	struct mxs_power_regs *power_regs =
-		(struct mxs_power_regs *)IMX_POWER_BASE;
-
-	writel((0xc << POWER_VDDACTRL_TRG_OFFSET) |
-		(0x7 << POWER_VDDACTRL_BO_OFFSET_OFFSET) |
-		POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW,
-		&power_regs->hw_power_vddactrl);
-}
-
 static void mx23_mem_setup_vddmem(void)
 {
 	struct mxs_power_regs *power_regs =
@@ -287,8 +276,6 @@ void mx23_mem_init(void)
 	/* Fractional divider for ref_emi is 33 ; 480 * 18 / 33 = 266MHz */
 	mxs_mem_init_clock(33);
 
-	mxs_mem_setup_vdda();
-
 	/*
 	 * Reset/ungate the EMI block. This is essential, otherwise the system
 	 * suffers from memory instability. This thing is mx23 specific and is
@@ -340,8 +327,6 @@ void mx28_mem_init(void)
 	/* Fractional divider for ref_emi is 21 ; 480 * 18 / 21 = 411MHz */
 	mxs_mem_init_clock(21);
 
-	mxs_mem_setup_vdda();
-
 	/* Set DDR2 mode */
 	writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2,
 			IMX_IOMUXC_BASE + 0x1b80);
diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index 366b3f2..407b776 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -993,6 +993,19 @@ static const struct mxs_vddx_cfg mxs_vddmem_cfg = {
 	.bo_offset_offset	= 0,
 };
 
+static const struct mxs_vddx_cfg mxs_vdda_cfg = {
+	.reg			= &(((struct mxs_power_regs *)IMX_POWER_BASE)->
+					hw_power_vddactrl),
+	.step_mV		= 25,
+	.lowest_mV		= 1500,
+	.powered_by_linreg	= NULL,
+	.trg_mask		= POWER_VDDACTRL_TRG_MASK,
+	.bo_irq			= POWER_CTRL_VDDA_BO_IRQ,
+	.bo_enirq		= POWER_CTRL_ENIRQ_VDDA_BO,
+	.bo_offset_mask		= POWER_VDDACTRL_BO_OFFSET_MASK,
+	.bo_offset_offset	= POWER_VDDACTRL_BO_OFFSET_OFFSET,
+};
+
 /**
  * mxs_power_set_vddx() - Configure voltage on DC-DC converter rail
  * @cfg:		Configuration data of the DC-DC converter rail
@@ -1151,6 +1164,7 @@ static void __mx23_power_init(int has_battery)
 	mxs_power_set_vddx(&mx23_vddio_cfg, 3300, 3150);
 	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1325);
 	mxs_power_set_vddx(&mxs_vddmem_cfg, 2500, 1700);
+	mxs_power_set_vddx(&mxs_vdda_cfg, 1800, 1650);
 
 	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
 		POWER_CTRL_VDDIO_BO_IRQ | POWER_CTRL_VDD5V_DROOP_IRQ |
@@ -1207,6 +1221,7 @@ static void __mx28_power_init(int has_battery)
 
 	mxs_power_set_vddx(&mx28_vddio_cfg, 3300, 3150);
 	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1325);
+	mxs_power_set_vddx(&mxs_vdda_cfg, 1800, 1650);
 
 	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
 		POWER_CTRL_VDDIO_BO_IRQ | POWER_CTRL_VDD5V_DROOP_IRQ |
-- 
2.1.4


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[PATCH 13/15] ARM: MXS: Add regulator debug print

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-mxs/power-init.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index 407b776..5d4d089 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -24,6 +24,40 @@
 #include <mach/regs-rtc.h>
 #include <mach/regs-lradc.h>
 
+static void mxs_power_status(void)
+{
+	struct mxs_power_regs *power_regs =
+		(struct mxs_power_regs *)IMX_POWER_BASE;
+	static int linregofs[] = { 0, 1, -1, -2 };
+
+	uint32_t vddio = readl(&power_regs->hw_power_vddioctrl);
+	uint32_t vdda = readl(&power_regs->hw_power_vddactrl);
+	uint32_t vddd = readl(&power_regs->hw_power_vdddctrl);
+	uint32_t vddmem = readl(&power_regs->hw_power_vddmemctrl);
+
+	printf("vddio:  %dmV (BO -%dmV), Linreg enabled, Linreg offset: %d, FET %sabled\n",
+			(vddio & 0x1f) * 50 + 2800,
+			((vddio >> 8) & 0x7) * 50,
+			linregofs[((vdda >> 12) & 0x3)],
+			(vddio & (1 << 16)) ? "dis" : "en");
+	printf("vdda:   %dmV (BO -%dmV), Linreg %sabled, Linreg offset: %d, FET %sabled\n",
+			(vdda & 0x1f) * 25 + 1500,
+			((vdda >> 8) & 0x7) * 25,
+			(vdda & (1 << 17)) ? "en" : "dis",
+			linregofs[((vdda >> 12) & 0x3)],
+			(vdda & (1 << 16)) ? "dis" : "en");
+	printf("vddd:   %dmV (BO -%dmV), Linreg %sabled, Linreg offset: %d, FET %sabled\n",
+			(vddd & 0x1f) * 25 + 800,
+			((vddd >> 8) & 0x7) * 25,
+			(vddd & (1 << 21)) ? "en" : "dis",
+			linregofs[((vdda >> 16) & 0x3)],
+			(vdda & (1 << 20)) ? "dis" : "en");
+	printf("vddmem: %dmV (BO -%dmV), Linreg %sabled\n",
+			(vddmem & 0x1f) * 25 + 1100,
+			((vddmem >> 5) & 0x7) * 25,
+			(vddmem & (1 << 8)) ? "en" : "dis");
+}
+
 /*
  * This delay function is intended to be used only in early stage of boot, where
  * clock are not set up yet. The timer used here is reset on every boot and
@@ -1197,6 +1231,7 @@ static void __mx28_power_init(int has_battery)
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
 
+	mxs_power_status();
 	mxs_power_clock2xtal();
 	mxs_power_set_auto_restart();
 	mxs_power_set_linreg();
@@ -1231,6 +1266,8 @@ static void __mx28_power_init(int has_battery)
 	writel(POWER_5VCTRL_PWDN_5VBRNOUT, &power_regs->hw_power_5vctrl_set);
 
 	mxs_early_delay(1000);
+
+	mxs_power_status();
 }
 
 void mx28_power_init(void)
-- 
2.1.4


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[PATCH 14/15] ARM: MXS: power-init: Add parameters to mx28_power_init()

[Sascha Hauer]

Instead of introducing new functions each time a new power supply
situation is to be added, this patch adds parameters to mx28_power_init.

Right now there are three parameters:

- has_battery - true when this board has a battery.
- use_battery_input - true when this board is supplied from the
  battery input, but has a DC source instead of a real battery
- use_5v_input - true when this board can use the 5V input

The third one is introduced with this patch and allow to boot a board from 5v
(USB) source only. The main necessary change this needs is that the DC-DC
converter must always be sourced from DCDC_4P2 (DROPOUT_CTRL field of
HW_POWER_DCDC4P2)

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/boards/freescale-mx28-evk/lowlevel.c |  2 +-
 arch/arm/boards/karo-tx28/lowlevel.c          |  2 +-
 arch/arm/mach-mxs/include/mach/init.h         |  8 ++--
 arch/arm/mach-mxs/power-init.c                | 67 ++++++++++++++++-----------
 4 files changed, 47 insertions(+), 32 deletions(-)

diff --git a/arch/arm/boards/freescale-mx28-evk/lowlevel.c b/arch/arm/boards/freescale-mx28-evk/lowlevel.c
index a46a080..1f56756 100644
--- a/arch/arm/boards/freescale-mx28-evk/lowlevel.c
+++ b/arch/arm/boards/freescale-mx28-evk/lowlevel.c
@@ -43,7 +43,7 @@ static noinline void freescale_mx28evk_init(void)
 
 	pr_debug("initializing power...\n");
 
-	mx28_power_init_battery_input();
+	mx28_power_init(0, 1, 0);
 
 	pr_debug("initializing SDRAM...\n");
 
diff --git a/arch/arm/boards/karo-tx28/lowlevel.c b/arch/arm/boards/karo-tx28/lowlevel.c
index c5fdda1..96a8b9b 100644
--- a/arch/arm/boards/karo-tx28/lowlevel.c
+++ b/arch/arm/boards/karo-tx28/lowlevel.c
@@ -43,7 +43,7 @@ static noinline void karo_tx28_init(void)
 
 	pr_debug("initializing power...\n");
 
-	mx28_power_init_battery_input();
+	mx28_power_init(0, 1, 0);
 
 	pr_debug("initializing SDRAM...\n");
 
diff --git a/arch/arm/mach-mxs/include/mach/init.h b/arch/arm/mach-mxs/include/mach/init.h
index 1f9d8d4..90b413e 100644
--- a/arch/arm/mach-mxs/include/mach/init.h
+++ b/arch/arm/mach-mxs/include/mach/init.h
@@ -12,10 +12,10 @@
 
 void mxs_early_delay(int delay);
 
-void mx23_power_init(void);
-void mx23_power_init_battery_input(void);
-void mx28_power_init(void);
-void mx28_power_init_battery_input(void);
+void mx23_power_init(int __has_battery, int __use_battery_input,
+		int __use_5v_input);
+void mx28_power_init(int __has_battery, int __use_battery_input,
+		int __use_5v_input);
 void mxs_power_wait_pswitch(void);
 
 extern uint32_t mx28_dram_vals[];
diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index 5d4d089..595b51c 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -24,6 +24,22 @@
 #include <mach/regs-rtc.h>
 #include <mach/regs-lradc.h>
 
+/*
+ * has_battery - true when this board has a battery.
+ */
+static int has_battery;
+
+/*
+ * use_battery_input - true when this board is supplied from the
+ * battery input, but has a DC source instead of a real battery
+ */
+static int use_battery_input;
+
+/*
+ * use_5v_input - true when this board can use the 5V input
+ */
+static int use_5v_input;
+
 static void mxs_power_status(void)
 {
 	struct mxs_power_regs *power_regs =
@@ -472,7 +488,7 @@ static void mxs_power_enable_4p2(void)
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
 	uint32_t vdddctrl, vddactrl, vddioctrl;
-	uint32_t tmp, tmp2;
+	uint32_t tmp, tmp2, dropout_ctrl;
 
 	vdddctrl = readl(&power_regs->hw_power_vdddctrl);
 	vddactrl = readl(&power_regs->hw_power_vddactrl);
@@ -498,10 +514,15 @@ static void mxs_power_enable_4p2(void)
 		POWER_5VCTRL_HEADROOM_ADJ_MASK,
 		0x4 << POWER_5VCTRL_HEADROOM_ADJ_OFFSET);
 
+	if (has_battery || use_battery_input)
+		dropout_ctrl = POWER_DCDC4P2_DROPOUT_CTRL_SRC_SEL;
+	else
+		dropout_ctrl = POWER_DCDC4P2_DROPOUT_CTRL_SRC_4P2;
+
 	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
 		POWER_DCDC4P2_DROPOUT_CTRL_MASK,
 		POWER_DCDC4P2_DROPOUT_CTRL_100MV |
-		POWER_DCDC4P2_DROPOUT_CTRL_SRC_SEL);
+		dropout_ctrl);
 
 	clrsetbits_le32(&power_regs->hw_power_5vctrl,
 		POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
@@ -1162,11 +1183,16 @@ static void mx23_ungate_power(void)
  * This function calls all the power block initialization functions in
  * proper sequence to start the power block.
  */
-static void __mx23_power_init(int has_battery)
+void mx23_power_init(int __has_battery, int __use_battery_input,
+		int __use_5v_input)
 {
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
 
+	has_battery = __has_battery;
+	use_battery_input = __use_battery_input;
+	use_5v_input = __use_5v_input;
+
 	mx23_ungate_power();
 
 	mxs_power_clock2xtal();
@@ -1180,8 +1206,10 @@ static void __mx23_power_init(int has_battery)
 
 	if (has_battery)
 		mxs_power_configure_power_source();
-	else
+	else if (use_battery_input)
 		mxs_enable_battery_input();
+	else if (use_5v_input)
+		mxs_boot_valid_5v();
 
 	mxs_power_clock2pll();
 
@@ -1210,27 +1238,22 @@ static void __mx23_power_init(int has_battery)
 	mxs_early_delay(1000);
 }
 
-void mx23_power_init(void)
-{
-	__mx23_power_init(1);
-}
-
-void mx23_power_init_battery_input(void)
-{
-	__mx23_power_init(0);
-}
-
 /**
  * mx28_power_init() - The power block init main function
  *
  * This function calls all the power block initialization functions in
  * proper sequence to start the power block.
  */
-static void __mx28_power_init(int has_battery)
+void mx28_power_init(int __has_battery, int __use_battery_input,
+		int __use_5v_input)
 {
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
 
+	has_battery = __has_battery;
+	use_battery_input = __use_battery_input;
+	use_5v_input = __use_5v_input;
+
 	mxs_power_status();
 	mxs_power_clock2xtal();
 	mxs_power_set_auto_restart();
@@ -1243,8 +1266,10 @@ static void __mx28_power_init(int has_battery)
 
 	if (has_battery)
 		mxs_power_configure_power_source();
-	else
+	else if (use_battery_input)
 		mxs_enable_battery_input();
+	else if (use_5v_input)
+		mxs_boot_valid_5v();
 
 	mxs_power_clock2pll();
 
@@ -1270,16 +1295,6 @@ static void __mx28_power_init(int has_battery)
 	mxs_power_status();
 }
 
-void mx28_power_init(void)
-{
-	__mx28_power_init(1);
-}
-
-void mx28_power_init_battery_input(void)
-{
-	__mx28_power_init(0);
-}
-
 /**
  * mxs_power_wait_pswitch() - Wait for power switch to be pressed
  *
-- 
2.1.4


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[PATCH 15/15] ARM: MXS: Add duckbill board support

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/boards/Makefile            |   1 +
 arch/arm/boards/duckbill/Makefile   |   2 +
 arch/arm/boards/duckbill/board.c    |  82 +++++++++++++++++++++++++++++
 arch/arm/boards/duckbill/lowlevel.c |  73 ++++++++++++++++++++++++++
 arch/arm/configs/duckbill_defconfig | 100 ++++++++++++++++++++++++++++++++++++
 arch/arm/dts/Makefile               |   1 +
 arch/arm/dts/imx28-duckbill.dts     |  15 ++++++
 arch/arm/mach-mxs/Kconfig           |   8 +++
 images/Makefile.mxs                 |  10 ++++
 9 files changed, 292 insertions(+)
 create mode 100644 arch/arm/boards/duckbill/Makefile
 create mode 100644 arch/arm/boards/duckbill/board.c
 create mode 100644 arch/arm/boards/duckbill/lowlevel.c
 create mode 100644 arch/arm/configs/duckbill_defconfig
 create mode 100644 arch/arm/dts/imx28-duckbill.dts

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index 9961ca8..d81d360 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_MACH_CFA10036)			+= crystalfontz-cfa10036/
 obj-$(CONFIG_MACH_CHUMBY)			+= chumby_falconwing/
 obj-$(CONFIG_MACH_CLEP7212)			+= clep7212/
 obj-$(CONFIG_MACH_DFI_FS700_M60)		+= dfi-fs700-m60/
+obj-$(CONFIG_MACH_DUCKBILL)			+= duckbill/
 obj-$(CONFIG_MACH_DSS11)			+= dss11/
 obj-$(CONFIG_MACH_EDB93012)			+= edb93xx/
 obj-$(CONFIG_MACH_EDB9301)			+= edb93xx/
diff --git a/arch/arm/boards/duckbill/Makefile b/arch/arm/boards/duckbill/Makefile
new file mode 100644
index 0000000..01c7a25
--- /dev/null
+++ b/arch/arm/boards/duckbill/Makefile
@@ -0,0 +1,2 @@
+obj-y += board.o
+lwl-y += lowlevel.o
diff --git a/arch/arm/boards/duckbill/board.c b/arch/arm/boards/duckbill/board.c
new file mode 100644
index 0000000..3c6ab8e
--- /dev/null
+++ b/arch/arm/boards/duckbill/board.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2010 Juergen Beisert, Pengutronix <kernel@pengutronix.de>
+ * Copyright (C) 2011 Marc Kleine-Budde, Pengutronix <mkl@pengutronix.de>
+ * Copyright (C) 2011 Wolfram Sang, Pengutronix <w.sang@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <environment.h>
+#include <errno.h>
+#include <gpio.h>
+#include <init.h>
+#include <io.h>
+#include <net.h>
+
+#include <mach/clock.h>
+#include <mach/imx-regs.h>
+#include <mach/iomux-imx28.h>
+#include <mach/iomux.h>
+#include <mach/ocotp.h>
+#include <mach/devices.h>
+#include <mach/usb.h>
+#include <usb/fsl_usb2.h>
+
+#include <asm/armlinux.h>
+#include <asm/mmu.h>
+
+static void duckbill_get_ethaddr(void)
+{
+	u8 mac_ocotp[3], mac[6];
+	int ret;
+
+	ret = mxs_ocotp_read(mac_ocotp, 3, 0);
+	if (ret != 3) {
+		pr_err("Reading MAC from OCOTP failed!\n");
+		return;
+	}
+
+	mac[0] = 0x00;
+	mac[1] = 0x04;
+	mac[2] = 0x9f;
+	mac[3] = mac_ocotp[2];
+	mac[4] = mac_ocotp[1];
+	mac[5] = mac_ocotp[0];
+
+	eth_register_ethaddr(0, mac);
+}
+
+static struct fsl_usb2_platform_data usb_pdata = {
+	.operating_mode	= FSL_USB2_DR_DEVICE,
+	.phy_mode	= FSL_USB2_PHY_UTMI,
+};
+
+static int duckbill_devices_init(void)
+{
+	duckbill_get_ethaddr(); /* must be after registering ocotp */
+
+	imx28_usb_phy0_enable();
+	add_generic_device("fsl-udc", DEVICE_ID_DYNAMIC, NULL, IMX_USB0_BASE,
+			   0x200, IORESOURCE_MEM, &usb_pdata);
+
+	return 0;
+}
+fs_initcall(duckbill_devices_init);
+
+static int duckbill_console_init(void)
+{
+	barebox_set_model("I2SE Duckbill");
+	barebox_set_hostname("duckbill");
+
+	return 0;
+}
+console_initcall(duckbill_console_init);
diff --git a/arch/arm/boards/duckbill/lowlevel.c b/arch/arm/boards/duckbill/lowlevel.c
new file mode 100644
index 0000000..4cb991f
--- /dev/null
+++ b/arch/arm/boards/duckbill/lowlevel.c
@@ -0,0 +1,73 @@
+#define pr_fmt(fmt) "Freescale MX28evk: " fmt
+#define DEBUG
+
+#include <common.h>
+#include <linux/sizes.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/imx28-regs.h>
+#include <mach/init.h>
+#include <io.h>
+#include <debug_ll.h>
+#include <mach/iomux.h>
+#include <stmp-device.h>
+
+extern char __dtb_imx28_duckbill_start[];
+
+ENTRY_FUNCTION(start_barebox_duckbill, r0, r1, r2)
+{
+	void *fdt;
+
+	pr_debug("here we are!\n");
+
+	fdt = __dtb_imx28_duckbill_start - get_runtime_offset();
+
+	barebox_arm_entry(IMX_MEMORY_BASE, SZ_128M, fdt);
+}
+
+static const uint32_t iomux_pads[] = {
+	/* EMI */
+	EMI_DATA0, EMI_DATA1, EMI_DATA2, EMI_DATA3, EMI_DATA4, EMI_DATA5,
+	EMI_DATA6, EMI_DATA7, EMI_DATA8, EMI_DATA9, EMI_DATA10, EMI_DATA11,
+	EMI_DATA12, EMI_DATA13, EMI_DATA14, EMI_DATA15, EMI_ODT0, EMI_DQM0,
+	EMI_ODT1, EMI_DQM1, EMI_DDR_OPEN_FB, EMI_CLK, EMI_DSQ0, EMI_DSQ1,
+	EMI_DDR_OPEN, EMI_A0, EMI_A1, EMI_A2, EMI_A3, EMI_A4, EMI_A5,
+	EMI_A6, EMI_A7, EMI_A8, EMI_A9, EMI_A10, EMI_A11, EMI_A12, EMI_A13,
+	EMI_A14, EMI_BA0, EMI_BA1, EMI_BA2, EMI_CASN, EMI_RASN, EMI_WEN,
+	EMI_CE0N, EMI_CE1N, EMI_CKE,
+
+	/* Debug UART */
+	PWM0_DUART_RX | VE_3_3V,
+	PWM1_DUART_TX | VE_3_3V,
+};
+
+static noinline void duckbill_init(void)
+{
+	int i;
+
+	/* initialize muxing */
+	for (i = 0; i < ARRAY_SIZE(iomux_pads); i++)
+		imx_gpio_mode(iomux_pads[i]);
+
+	pr_debug("initializing power...\n");
+
+	mx28_power_init();
+
+	pr_debug("initializing SDRAM...\n");
+
+	mx28_mem_init();
+
+	pr_debug("DONE\n");
+}
+
+ENTRY_FUNCTION(prep_start_barebox_duckbill, r0, r1, r2)
+{
+	void (*back)(unsigned long) = (void *)get_lr();
+
+	relocate_to_current_adr();
+	setup_c();
+
+	duckbill_init();
+
+	back(0);
+}
diff --git a/arch/arm/configs/duckbill_defconfig b/arch/arm/configs/duckbill_defconfig
new file mode 100644
index 0000000..6210416
--- /dev/null
+++ b/arch/arm/configs/duckbill_defconfig
@@ -0,0 +1,100 @@
+CONFIG_ARCH_MXS=y
+CONFIG_ARCH_IMX28=y
+CONFIG_MACH_DUCKBILL=y
+CONFIG_ARCH_MXS_USBLOADER=y
+CONFIG_AEABI=y
+CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS=y
+CONFIG_ARM_UNWIND=y
+CONFIG_MMU=y
+CONFIG_TEXT_BASE=0x0
+CONFIG_MALLOC_SIZE=0x0
+CONFIG_MALLOC_TLSF=y
+CONFIG_KALLSYMS=y
+CONFIG_RELOCATABLE=y
+CONFIG_HUSH_FANCY_PROMPT=y
+CONFIG_CMDLINE_EDITING=y
+CONFIG_AUTO_COMPLETE=y
+CONFIG_MENU=y
+CONFIG_BLSPEC=y
+CONFIG_DEFAULT_ENVIRONMENT_GENERIC_NEW=y
+CONFIG_RESET_SOURCE=y
+CONFIG_DEBUG_INFO=y
+CONFIG_CMD_DMESG=y
+CONFIG_LONGHELP=y
+CONFIG_CMD_IOMEM=y
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_BOOTM_SHOW_TYPE=y
+CONFIG_CMD_BOOTM_VERBOSE=y
+CONFIG_CMD_BOOTM_INITRD=y
+CONFIG_CMD_GO=y
+CONFIG_CMD_RESET=y
+CONFIG_CMD_UIMAGE=y
+CONFIG_CMD_PARTITION=y
+CONFIG_CMD_EXPORT=y
+CONFIG_CMD_LOADENV=y
+CONFIG_CMD_PRINTENV=y
+CONFIG_CMD_MAGICVAR=y
+CONFIG_CMD_MAGICVAR_HELP=y
+CONFIG_CMD_SAVEENV=y
+CONFIG_CMD_CMP=y
+CONFIG_CMD_FILETYPE=y
+CONFIG_CMD_LN=y
+CONFIG_CMD_MD5SUM=y
+CONFIG_CMD_UNCOMPRESS=y
+CONFIG_CMD_LET=y
+CONFIG_CMD_MSLEEP=y
+CONFIG_CMD_READF=y
+CONFIG_CMD_SLEEP=y
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_HOST=y
+CONFIG_CMD_MIITOOL=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_TFTP=y
+CONFIG_CMD_ECHO_E=y
+CONFIG_CMD_EDIT=y
+CONFIG_CMD_MENUTREE=y
+CONFIG_CMD_SPLASH=y
+CONFIG_CMD_READLINE=y
+CONFIG_CMD_TIMEOUT=y
+CONFIG_CMD_CRC=y
+CONFIG_CMD_CRC_CMP=y
+CONFIG_CMD_MM=y
+CONFIG_CMD_CLK=y
+CONFIG_CMD_DETECT=y
+CONFIG_CMD_FLASH=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_LED=y
+CONFIG_CMD_NANDTEST=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_LED_TRIGGER=y
+CONFIG_CMD_USBGADGET=y
+CONFIG_CMD_OF_NODE=y
+CONFIG_CMD_OF_PROPERTY=y
+CONFIG_CMD_OFTREE=y
+CONFIG_NET=y
+CONFIG_OFDEVICE=y
+CONFIG_OF_BAREBOX_DRIVERS=y
+CONFIG_DRIVER_SERIAL_AUART=y
+CONFIG_DRIVER_NET_FEC_IMX=y
+CONFIG_DRIVER_SPI_MXS=y
+CONFIG_MTD=y
+CONFIG_NAND=y
+CONFIG_NAND_MXS=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_DFU=y
+CONFIG_USB_GADGET_SERIAL=y
+CONFIG_USB_GADGET_FASTBOOT=y
+CONFIG_VIDEO=y
+CONFIG_DRIVER_VIDEO_STM=y
+CONFIG_MCI=y
+CONFIG_MCI_STARTUP=y
+CONFIG_MCI_MXS=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_LED_GPIO_OF=y
+CONFIG_LED_TRIGGERS=y
+CONFIG_MXS_APBH_DMA=y
+CONFIG_FS_TFTP=y
+CONFIG_FS_FAT=y
+CONFIG_FS_FAT_WRITE=y
+CONFIG_FS_FAT_LFN=y
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index dc32dd3..f716628 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -10,6 +10,7 @@ obj-y += empty.o
 pbl-dtb-$(CONFIG_MACH_AFI_GF) += am335x-afi-gf.dtb.o
 pbl-dtb-$(CONFIG_MACH_BEAGLEBONE) += am335x-bone.dtb.o am335x-boneblack.dtb.o am335x-bone-common.dtb.o
 pbl-dtb-$(CONFIG_MACH_DFI_FS700_M60) += imx6q-dfi-fs700-m60-6q.dtb.o imx6dl-dfi-fs700-m60-6s.dtb.o
+pbl-dtb-$(CONFIG_MACH_DUCKBILL) += imx28-duckbill.dtb.o
 pbl-dtb-$(CONFIG_MACH_EFIKA_MX_SMARTBOOK) += imx51-genesi-efika-sb.dtb.o
 pbl-dtb-$(CONFIG_MACH_EMBEST_RIOTBOARD) += imx6s-riotboard.dtb.o
 pbl-dtb-$(CONFIG_MACH_EMBEDSKY_E9) += imx6q-embedsky-e9.dtb.o
diff --git a/arch/arm/dts/imx28-duckbill.dts b/arch/arm/dts/imx28-duckbill.dts
new file mode 100644
index 0000000..2a995a7
--- /dev/null
+++ b/arch/arm/dts/imx28-duckbill.dts
@@ -0,0 +1,15 @@
+#include <arm/imx28-duckbill.dts>
+
+/ {
+	chosen {
+		stdout-path = &duart;
+	};
+};
+
+&duart {
+	arm,primecell-periphid = <0x00041011>;
+};
+
+&ocotp {
+	status = "okay";
+};
diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 5b50e82..ea0fa5a 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -74,6 +74,14 @@ config MACH_MX28EVK
 	help
 	  Say Y here if you are using the Freescale i.MX28-EVK board
 
+config MACH_DUCKBILL
+	bool "Duckbill"
+	select HAVE_DEFAULT_ENVIRONMENT_NEW
+	select MXS_OCOTP
+	select HAVE_PBL_MULTI_IMAGES
+	help
+	  Say Y here if you are using the I2SE Duckbill board
+
 config MACH_CFA10036
 	bool "cfa-10036"
 	select HAVE_DEFAULT_ENVIRONMENT_NEW
diff --git a/images/Makefile.mxs b/images/Makefile.mxs
index e2cdbd2..733f83b 100644
--- a/images/Makefile.mxs
+++ b/images/Makefile.mxs
@@ -22,6 +22,16 @@ board = $(srctree)/arch/$(ARCH)/boards
 mxs23cfg = $(srctree)/arch/arm/mach-mxs/mxs23img.cfg
 mxs28cfg = $(srctree)/arch/arm/mach-mxs/mxs28img.cfg
 
+pblx-$(CONFIG_MACH_DUCKBILL) += start_barebox_duckbill prep_start_barebox_duckbill
+PREP_start_barebox_duckbill.pblx.mxsbs = start_barebox_duckbill_prep
+CFG_start_barebox_duckbill.mxsbs = $(mxs28cfg)
+FILE_barebox-duckbill-bootstream.img = start_barebox_duckbill.mxsbs
+image-$(CONFIG_MACH_DUCKBILL) += barebox-duckbill-bootstream.img
+FILE_barebox-duckbill-sd.img = start_barebox_duckbill.mxsbs.mxssd
+image-$(CONFIG_MACH_DUCKBILL) += barebox-duckbill-sd.img
+FILE_barebox-duckbill-2nd.img = start_barebox_duckbill.pblx
+image-$(CONFIG_MACH_DUCKBILL) += barebox-duckbill-2nd.img
+
 pblx-$(CONFIG_MACH_TX28) += start_barebox_karo_tx28 prep_start_barebox_karo_tx28
 PREP_start_barebox_karo_tx28.pblx.mxsbs = start_barebox_karo_tx28_prep
 CFG_start_barebox_karo_tx28.mxsbs = $(mxs28cfg)
-- 
2.1.4


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