* [PATCH] eukrea_cpuimx35: better usage of LCD enable pins
@ 2010-06-24 15:03 Eric Bénard
0 siblings, 0 replies; 2+ messages in thread
From: Eric Bénard @ 2010-06-24 15:03 UTC (permalink / raw)
To: barebox
Use the enable hook to driver the LCD's enable pin.
Unfortunalty, because of the time the LCD takes to come out of
reset, I have to use a GPIO in order to turn on/off the backlight
instead of driving it from the enable function, else we get a
flicker at power on.
Signed-off-by: Eric Bénard <eric@eukrea.com>
---
board/eukrea_cpuimx35/env/bin/init | 2 ++
board/eukrea_cpuimx35/eukrea_cpuimx35.c | 22 +++++++++++++---------
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/board/eukrea_cpuimx35/env/bin/init b/board/eukrea_cpuimx35/env/bin/init
index 49e54c5..ff7c2d7 100644
--- a/board/eukrea_cpuimx35/env/bin/init
+++ b/board/eukrea_cpuimx35/env/bin/init
@@ -13,9 +13,11 @@ if [ -e /dev/nand0 ]; then
fi
if [ -f /env/logo.bmp ]; then
+ fb0.enable=1
bmp /env/logo.bmp
elif [ -f /env/logo.bmp.lzo ]; then
unlzo /env/logo.bmp.lzo /logo.bmp
+ fb0.enable=1
bmp /logo.bmp
fi
diff --git a/board/eukrea_cpuimx35/eukrea_cpuimx35.c b/board/eukrea_cpuimx35/eukrea_cpuimx35.c
index 6eeb4a3..756546a 100644
--- a/board/eukrea_cpuimx35/eukrea_cpuimx35.c
+++ b/board/eukrea_cpuimx35/eukrea_cpuimx35.c
@@ -104,9 +104,15 @@ static struct fb_videomode imxfb_mode = {
.flag = 0,
};
+static void eukrea_cpuimx35_enable_display(int enable)
+{
+ gpio_direction_output(4, enable);
+}
+
static struct imx_ipu_fb_platform_data ipu_fb_data = {
.mode = &imxfb_mode,
.bpp = 16,
+ .enable = eukrea_cpuimx35_enable_display,
};
static struct device_d imxfb_dev = {
@@ -153,6 +159,7 @@ static int eukrea_cpuimx35_devices_init(void)
register_device(&fec_dev);
register_device(&sdram_dev);
+
register_device(&imxfb_dev);
armlinux_add_dram(&sdram_dev);
@@ -164,15 +171,6 @@ static int eukrea_cpuimx35_devices_init(void)
device_initcall(eukrea_cpuimx35_devices_init);
-static int eukrea_cpuimx35_enable_display(void)
-{
- gpio_direction_output(1, 1);
- gpio_direction_output(0, 0);
- return 0;
-}
-
-late_initcall(eukrea_cpuimx35_enable_display);
-
static struct device_d eukrea_cpuimx35_serial_device = {
.name = "imx_serial",
.map_base = IMX_UART1_BASE,
@@ -207,6 +205,8 @@ static struct pad_desc eukrea_cpuimx35_pads[] = {
MX35_PAD_CTS1__UART1_CTS,
MX35_PAD_LD23__GPIO3_29,
+ MX35_PAD_CONTRAST__GPIO1_1,
+ MX35_PAD_D3_CLS__GPIO1_4,
};
static int eukrea_cpuimx35_console_init(void)
@@ -214,6 +214,10 @@ static int eukrea_cpuimx35_console_init(void)
mxc_iomux_v3_setup_multiple_pads(eukrea_cpuimx35_pads,
ARRAY_SIZE(eukrea_cpuimx35_pads));
+ /* screen default on to prevent flicker */
+ gpio_direction_output(4, 1);
+ /* backlight default off */
+ gpio_direction_output(1, 0);
/* led default off */
gpio_direction_output(32 * 2 + 29, 1);
--
1.6.3.3
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^ permalink raw reply [flat|nested] 2+ messages in thread* [PATCH] eukrea_cpuimx35: better usage of LCD enable pins
@ 2010-06-29 16:25 Eric Bénard
0 siblings, 0 replies; 2+ messages in thread
From: Eric Bénard @ 2010-06-29 16:25 UTC (permalink / raw)
To: s.hauer; +Cc: barebox
Use the enable hook to driver the LCD's enable pin.
Unfortunalty, because of the time the LCD takes to come out of
reset, I have to use a GPIO in order to turn on/off the backlight
instead of driving it from the enable function, else we get a
flicker at power on.
Signed-off-by: Eric Bénard <eric@eukrea.com>
---
v2 :
update init script to turn backlight on (gpio 1)
board/eukrea_cpuimx35/env/bin/init | 4 ++++
board/eukrea_cpuimx35/eukrea_cpuimx35.c | 22 +++++++++++++---------
2 files changed, 17 insertions(+), 9 deletions(-)
diff --git a/board/eukrea_cpuimx35/env/bin/init b/board/eukrea_cpuimx35/env/bin/init
index 49e54c5..90007cd 100644
--- a/board/eukrea_cpuimx35/env/bin/init
+++ b/board/eukrea_cpuimx35/env/bin/init
@@ -13,10 +13,14 @@ if [ -e /dev/nand0 ]; then
fi
if [ -f /env/logo.bmp ]; then
+ fb0.enable=1
bmp /env/logo.bmp
+ gpio_direction_out 1 1
elif [ -f /env/logo.bmp.lzo ]; then
unlzo /env/logo.bmp.lzo /logo.bmp
+ fb0.enable=1
bmp /logo.bmp
+ gpio_direction_out 1 1
fi
if [ -z $eth0.ethaddr ]; then
diff --git a/board/eukrea_cpuimx35/eukrea_cpuimx35.c b/board/eukrea_cpuimx35/eukrea_cpuimx35.c
index 6eeb4a3..756546a 100644
--- a/board/eukrea_cpuimx35/eukrea_cpuimx35.c
+++ b/board/eukrea_cpuimx35/eukrea_cpuimx35.c
@@ -104,9 +104,15 @@ static struct fb_videomode imxfb_mode = {
.flag = 0,
};
+static void eukrea_cpuimx35_enable_display(int enable)
+{
+ gpio_direction_output(4, enable);
+}
+
static struct imx_ipu_fb_platform_data ipu_fb_data = {
.mode = &imxfb_mode,
.bpp = 16,
+ .enable = eukrea_cpuimx35_enable_display,
};
static struct device_d imxfb_dev = {
@@ -153,6 +159,7 @@ static int eukrea_cpuimx35_devices_init(void)
register_device(&fec_dev);
register_device(&sdram_dev);
+
register_device(&imxfb_dev);
armlinux_add_dram(&sdram_dev);
@@ -164,15 +171,6 @@ static int eukrea_cpuimx35_devices_init(void)
device_initcall(eukrea_cpuimx35_devices_init);
-static int eukrea_cpuimx35_enable_display(void)
-{
- gpio_direction_output(1, 1);
- gpio_direction_output(0, 0);
- return 0;
-}
-
-late_initcall(eukrea_cpuimx35_enable_display);
-
static struct device_d eukrea_cpuimx35_serial_device = {
.name = "imx_serial",
.map_base = IMX_UART1_BASE,
@@ -207,6 +205,8 @@ static struct pad_desc eukrea_cpuimx35_pads[] = {
MX35_PAD_CTS1__UART1_CTS,
MX35_PAD_LD23__GPIO3_29,
+ MX35_PAD_CONTRAST__GPIO1_1,
+ MX35_PAD_D3_CLS__GPIO1_4,
};
static int eukrea_cpuimx35_console_init(void)
@@ -214,6 +214,10 @@ static int eukrea_cpuimx35_console_init(void)
mxc_iomux_v3_setup_multiple_pads(eukrea_cpuimx35_pads,
ARRAY_SIZE(eukrea_cpuimx35_pads));
+ /* screen default on to prevent flicker */
+ gpio_direction_output(4, 1);
+ /* backlight default off */
+ gpio_direction_output(1, 0);
/* led default off */
gpio_direction_output(32 * 2 + 29, 1);
--
1.6.3.3
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-06-24 15:03 [PATCH] eukrea_cpuimx35: better usage of LCD enable pins Eric Bénard
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