From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.free-electrons.com ([88.190.12.23]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Tj60N-0001tz-MN for barebox@lists.infradead.org; Thu, 13 Dec 2012 10:27:04 +0000 From: Maxime Ripard Date: Thu, 13 Dec 2012 11:26:43 +0100 Message-Id: <1355394405-18814-2-git-send-email-maxime.ripard@free-electrons.com> In-Reply-To: <1355394405-18814-1-git-send-email-maxime.ripard@free-electrons.com> References: <1355394405-18814-1-git-send-email-maxime.ripard@free-electrons.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/3] ARM: cfa10036: Add the AT24HC02 I2C EEPROM To: barebox@lists.infradead.org Cc: Brian Lilly This EEPROM is found on the expansion boards available for the 10036 module. Since we won't need to do anything fancy except reading/writing from it, use bitbanging to communicate with it. This EEPROM will hold mostly the board_id so that we can determine if there is an expansion board plugged in and what expansion board it is. Signed-off-by: Maxime Ripard --- arch/arm/boards/crystalfontz-cfa10036/cfa10036.c | 23 ++++++++++++++++++++++ arch/arm/configs/cfa10036_defconfig | 3 ++- arch/arm/mach-mxs/Kconfig | 3 +++ 3 files changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c index 522d2d7..df0ead9 100644 --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c @@ -26,6 +26,10 @@ #include #include +#include +#include +#include + #include #include #include @@ -58,6 +62,10 @@ static const uint32_t cfa10036_pads[] = { SSP0_SCK | VE_3_3V | BITKEEPER(0), /* MCI slot power control 1 = off */ PWM3_GPIO | VE_3_3V | GPIO_OUT | GPIO_VALUE(0), + + /* i2c0 */ + AUART0_TX_GPIO | VE_3_3V | PULLUP(1), + AUART0_RX_GPIO | VE_3_3V | PULLUP(1), }; static struct mxs_mci_platform_data mci_pdata = { @@ -67,6 +75,18 @@ static struct mxs_mci_platform_data mci_pdata = { .f_max = 25000000, }; +static struct i2c_board_info cfa10036_i2c_devices[] = { + { + I2C_BOARD_INFO("24c02", 0x50) + }, +}; + +static struct i2c_gpio_platform_data i2c_gpio_pdata = { + .sda_pin = 3 * 32 + 1, + .scl_pin = 3 * 32 + 0, + .udelay = 5, /* ~100 kHz */ +}; + static int cfa10036_mem_init(void) { arm_add_mem_device("ram0", IMX_MEMORY_BASE, 128 * 1024 * 1024); @@ -97,6 +117,9 @@ static int cfa10036_devices_init(void) 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); + return 0; } device_initcall(cfa10036_devices_init); diff --git a/arch/arm/configs/cfa10036_defconfig b/arch/arm/configs/cfa10036_defconfig index 67a0e8f..c55d50d 100644 --- a/arch/arm/configs/cfa10036_defconfig +++ b/arch/arm/configs/cfa10036_defconfig @@ -11,7 +11,7 @@ CONFIG_LONGHELP=y CONFIG_HUSH_FANCY_PROMPT=y CONFIG_CMDLINE_EDITING=y CONFIG_AUTO_COMPLETE=y -CONFIG_MENU=y +CONFIG_CONSOLE_ACTIVATE_ALL=y CONFIG_DEFAULT_ENVIRONMENT_GENERIC_NEW=y CONFIG_DEFAULT_ENVIRONMENT_PATH="arch/arm/boards/crystalfontz-cfa10036/env" CONFIG_DEBUG_INFO=y @@ -35,6 +35,7 @@ CONFIG_CMD_TIMEOUT=y CONFIG_CMD_PARTITION=y CONFIG_CMD_GPIO=y # CONFIG_SPI is not set +CONFIG_I2C=y CONFIG_MCI=y CONFIG_MCI_STARTUP=y CONFIG_MCI_MXS=y diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig index ff295f1..4e7e750 100644 --- a/arch/arm/mach-mxs/Kconfig +++ b/arch/arm/mach-mxs/Kconfig @@ -77,6 +77,9 @@ config MACH_MX28EVK config MACH_CFA10036 bool "cfa-10036" select HAVE_DEFAULT_ENVIRONMENT_NEW + select MXS_OCOTP + select I2C_GPIO + select EEPROM_AT24 help Say Y here if you are using the Crystalfontz CFA-10036 module -- 1.7.9.5 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox