From daf7aabcc14b3d63d8f134ca181e8b66f047e2d6 Mon Sep 17 00:00:00 2001 From: Thomas Weber Date: Thu, 20 Jan 2011 15:41:48 +0000 Subject: [PATCH] OMAP3: Devkit8000: Change lcd power pin This patch fixes a wrongly used lcd enable pin. The Devkit8000 uses twl4030_ledA configured as output gpio only for the lcd enable line. twl4030_gpio.1 is used through the generic gpio functions while ledA is used via low level twl4030 calls. This patch removes the low level calls and use the generic gpio functions for initialization and use of ledA. This patch also fixes a bug where the lcd would not power down when blanking. Further this patch fixes an indentation issue. The comment line uses eight whitespace and is replaced with a hard tab. gpio_request + gpio_direction_output are replaced with gpio_request_one. The return value of gpio_request_one is used to set the value of the gpio to -EINVAL when unsuccessful, so that gpio_is_valid can detect the unsuccessful request. But already successful requested gpios are not freed. Reported-by: Daniel Morsing Signed-off-by: Thomas Weber Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/board-devkit8000.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) diff --git a/arch/arm/mach-omap2/board-devkit8000.c b/arch/arm/mach-omap2/board-devkit8000.c index e906e05bb41b..9a2a31e011ce 100644 --- a/arch/arm/mach-omap2/board-devkit8000.c +++ b/arch/arm/mach-omap2/board-devkit8000.c @@ -115,9 +115,6 @@ static struct omap2_hsmmc_info mmc[] = { static int devkit8000_panel_enable_lcd(struct omap_dss_device *dssdev) { - twl_i2c_write_u8(TWL4030_MODULE_GPIO, 0x80, REG_GPIODATADIR1); - twl_i2c_write_u8(TWL4030_MODULE_LED, 0x0, 0x0); - if (gpio_is_valid(dssdev->reset_gpio)) gpio_set_value_cansleep(dssdev->reset_gpio, 1); return 0; @@ -247,6 +244,8 @@ static struct gpio_led gpio_leds[]; static int devkit8000_twl_gpio_setup(struct device *dev, unsigned gpio, unsigned ngpio) { + int ret; + omap_mux_init_gpio(29, OMAP_PIN_INPUT); /* gpio + 0 is "mmc0_cd" (input/IRQ) */ mmc[0].gpio_cd = gpio + 0; @@ -255,17 +254,23 @@ static int devkit8000_twl_gpio_setup(struct device *dev, /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */ gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1; - /* gpio + 1 is "LCD_PWREN" (out, active high) */ - devkit8000_lcd_device.reset_gpio = gpio + 1; - gpio_request(devkit8000_lcd_device.reset_gpio, "LCD_PWREN"); - /* Disable until needed */ - gpio_direction_output(devkit8000_lcd_device.reset_gpio, 0); + /* TWL4030_GPIO_MAX + 0 is "LCD_PWREN" (out, active high) */ + devkit8000_lcd_device.reset_gpio = gpio + TWL4030_GPIO_MAX + 0; + ret = gpio_request_one(devkit8000_lcd_device.reset_gpio, + GPIOF_DIR_OUT | GPIOF_INIT_LOW, "LCD_PWREN"); + if (ret < 0) { + devkit8000_lcd_device.reset_gpio = -EINVAL; + printk(KERN_ERR "Failed to request GPIO for LCD_PWRN\n"); + } /* gpio + 7 is "DVI_PD" (out, active low) */ devkit8000_dvi_device.reset_gpio = gpio + 7; - gpio_request(devkit8000_dvi_device.reset_gpio, "DVI PowerDown"); - /* Disable until needed */ - gpio_direction_output(devkit8000_dvi_device.reset_gpio, 0); + ret = gpio_request_one(devkit8000_dvi_device.reset_gpio, + GPIOF_DIR_OUT | GPIOF_INIT_LOW, "DVI PowerDown"); + if (ret < 0) { + devkit8000_dvi_device.reset_gpio = -EINVAL; + printk(KERN_ERR "Failed to request GPIO for DVI PowerDown\n"); + } return 0; } -- 2.11.0