diff options
| author | Scott Williams <scwilliams@nvidia.com> | 2011-01-10 15:24:55 -0800 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2012-03-23 19:56:34 -0700 |
| commit | 4eea987cd20dcd944989bb711cc61e20d53224ff (patch) | |
| tree | cfa9b71196b3daeb7b73a2159c54f6c970a1b7fb /arch/arm/mach-tegra/board-aruba-panel.c | |
| parent | 5ea7b1b97a357decc8882dc1633cc5585f837629 (diff) | |
arm: tegra: Backlight control for aruba2/cardhu platforms
Bug 776857
Original-Change-Id: I0ed5723c381095b684b03c5650820019ab11b8a0
Reviewed-on: http://git-master/r/15430
Tested-by: Scott Williams <scwilliams@nvidia.com>
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Original-Change-Id: Ie2dc49007c6b70be3bf0c921464cb7c72378b26e
Rebase-Id: R28653f495ee024f93546900583f35cad6ef12001
Diffstat (limited to 'arch/arm/mach-tegra/board-aruba-panel.c')
| -rw-r--r-- | arch/arm/mach-tegra/board-aruba-panel.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/board-aruba-panel.c b/arch/arm/mach-tegra/board-aruba-panel.c index a56c5d05e478..e192ef315641 100644 --- a/arch/arm/mach-tegra/board-aruba-panel.c +++ b/arch/arm/mach-tegra/board-aruba-panel.c @@ -38,6 +38,53 @@ #define PMC_SCRATCH20 0xa0 #define aruba_lvds_shutdown TEGRA_GPIO_PB2 +#define aruba_bl_enb TEGRA_GPIO_PW1 + +static int aruba_backlight_init(struct device *dev) { + int ret; + + ret = gpio_request(aruba_bl_enb, "backlight_enb"); + if (ret < 0) + return ret; + + ret = gpio_direction_output(aruba_bl_enb, 1); + if (ret < 0) + gpio_free(aruba_bl_enb); + else + tegra_gpio_enable(aruba_bl_enb); + + return ret; +}; + +static void aruba_backlight_exit(struct device *dev) { + gpio_set_value(aruba_bl_enb, 0); + gpio_free(aruba_bl_enb); + tegra_gpio_disable(aruba_bl_enb); +} + +static int aruba_backlight_notify(struct device *unused, int brightness) +{ + gpio_set_value(aruba_bl_enb, !!brightness); + return brightness; +} + +static struct platform_pwm_backlight_data aruba_backlight_data = { + .pwm_id = 2, + .max_brightness = 255, + .dft_brightness = 224, + .pwm_period_ns = 5000000, + .init = aruba_backlight_init, + .exit = aruba_backlight_exit, + .notify = aruba_backlight_notify, +}; + +static struct platform_device aruba_backlight_device = { + .name = "pwm-backlight", + .id = -1, + .dev = { + .platform_data = &aruba_backlight_data, + }, +}; static int aruba_panel_enable(void) { @@ -168,9 +215,10 @@ static struct platform_device aruba_nvmap_device = { static struct platform_device *aruba_gfx_devices[] __initdata = { &aruba_nvmap_device, &tegra_grhost_device, + &tegra_pwfm2_device, + &aruba_backlight_device, }; - static inline u32 pmc_readl(unsigned long offset) { return readl(IO_TO_VIRT(TEGRA_PMC_BASE + offset)); |