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| author | Hans de Goede <hdegoede@redhat.com> | 2015-02-16 17:23:25 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2015-02-20 08:11:57 +0100 |
| commit | 55410089cb979d7a86ee817c0309c4c2348a90df (patch) | |
| tree | 8fef2d3466678e793c264cad9c199ef6ea1934d1 /board | |
| parent | 242e3d893d1311ea38abd25613076a29961d422e (diff) | |
| download | u-boot-imx-55410089cb979d7a86ee817c0309c4c2348a90df.zip u-boot-imx-55410089cb979d7a86ee817c0309c4c2348a90df.tar.gz u-boot-imx-55410089cb979d7a86ee817c0309c4c2348a90df.tar.bz2 | |
sunxi: video: Add support for LCD panels which need to be configured via i2c
This commits adds support for configuring a a bitbang i2c controller, which
is used on some boards to configure the LCD panel (via i2c).
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'board')
| -rw-r--r-- | board/sunxi/Kconfig | 24 | ||||
| -rw-r--r-- | board/sunxi/board.c | 10 |
2 files changed, 34 insertions, 0 deletions
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig index a170c56..bbb4d1b 100644 --- a/board/sunxi/Kconfig +++ b/board/sunxi/Kconfig @@ -344,6 +344,30 @@ config VIDEO_LCD_BL_PWM_ACTIVE_LOW ---help--- Set this if the backlight pwm output is active low. +config VIDEO_LCD_PANEL_I2C + bool "LCD panel needs to be configured via i2c" + depends on VIDEO + default m + ---help--- + Say y here if the LCD panel needs to be configured via i2c. This + will add a bitbang i2c controller using gpios to talk to the LCD. + +config VIDEO_LCD_PANEL_I2C_SDA + string "LCD panel i2c interface SDA pin" + depends on VIDEO_LCD_PANEL_I2C + default "PG12" + ---help--- + Set the SDA pin for the LCD i2c interface. This takes a string in the + format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H. + +config VIDEO_LCD_PANEL_I2C_SCL + string "LCD panel i2c interface SCL pin" + depends on VIDEO_LCD_PANEL_I2C + default "PG10" + ---help--- + Set the SCL pin for the LCD i2c interface. This takes a string in the + format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H. + # Note only one of these may be selected at a time! But hidden choices are # not supported by Kconfig diff --git a/board/sunxi/board.c b/board/sunxi/board.c index b70e00c..e1891d1 100644 --- a/board/sunxi/board.c +++ b/board/sunxi/board.c @@ -33,6 +33,12 @@ #include <linux/usb/musb.h> #include <net.h> +#if defined CONFIG_VIDEO_LCD_PANEL_I2C && !(defined CONFIG_SPL_BUILD) +/* So that we can use pin names in Kconfig and sunxi_name_to_gpio() */ +int soft_i2c_gpio_sda; +int soft_i2c_gpio_scl; +#endif + DECLARE_GLOBAL_DATA_PTR; /* add board specific code here */ @@ -152,6 +158,10 @@ void i2c_init_board(void) sunxi_gpio_set_cfgpin(SUNXI_GPB(0), SUNXI_GPB0_TWI0); sunxi_gpio_set_cfgpin(SUNXI_GPB(1), SUNXI_GPB0_TWI0); clock_twi_onoff(0, 1); +#if defined CONFIG_VIDEO_LCD_PANEL_I2C && !(defined CONFIG_SPL_BUILD) + soft_i2c_gpio_sda = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_PANEL_I2C_SDA); + soft_i2c_gpio_scl = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_PANEL_I2C_SCL); +#endif } #ifdef CONFIG_SPL_BUILD |