diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-07-16 12:32:05 +0200 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2013-07-19 11:22:46 +0900 |
| commit | d58226a21a7b84a3f82265821f24ce2aad267f1c (patch) | |
| tree | c7ce20517e0336eed75b6fac5a35d402ae62bb1c | |
| parent | ad81f0545ef01ea651886dddac4bef6cec930092 (diff) | |
ARM: shmobile: armadillo800eva: Add backlight support
The flat panel backlight on the Armadillo 800 EVA board is driven by the
TPU PWM output.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
| -rw-r--r-- | arch/arm/mach-shmobile/board-armadillo800eva.c | 54 |
1 files changed, 52 insertions, 2 deletions
diff --git a/arch/arm/mach-shmobile/board-armadillo800eva.c b/arch/arm/mach-shmobile/board-armadillo800eva.c index e115f6742107..9457c763b797 100644 --- a/arch/arm/mach-shmobile/board-armadillo800eva.c +++ b/arch/arm/mach-shmobile/board-armadillo800eva.c @@ -31,6 +31,8 @@ #include <linux/gpio_keys.h> #include <linux/regulator/driver.h> #include <linux/pinctrl/machine.h> +#include <linux/platform_data/pwm-renesas-tpu.h> +#include <linux/pwm_backlight.h> #include <linux/regulator/fixed.h> #include <linux/regulator/gpio-regulator.h> #include <linux/regulator/machine.h> @@ -387,7 +389,50 @@ static struct platform_device sh_eth_device = { .num_resources = ARRAY_SIZE(sh_eth_resources), }; -/* LCDC */ +/* PWM */ +static struct resource pwm_resources[] = { + [0] = { + .start = 0xe6600000, + .end = 0xe66000ff, + .flags = IORESOURCE_MEM, + }, +}; + +static struct tpu_pwm_platform_data pwm_device_data = { + .channels[2] = { + .polarity = PWM_POLARITY_INVERSED, + } +}; + +static struct platform_device pwm_device = { + .name = "renesas-tpu-pwm", + .id = -1, + .dev = { + .platform_data = &pwm_device_data, + }, + .num_resources = ARRAY_SIZE(pwm_resources), + .resource = pwm_resources, +}; + +static struct pwm_lookup pwm_lookup[] = { + PWM_LOOKUP("renesas-tpu-pwm", 2, "pwm-backlight.0", NULL), +}; + +/* LCDC and backlight */ +static struct platform_pwm_backlight_data pwm_backlight_data = { + .lth_brightness = 50, + .max_brightness = 255, + .dft_brightness = 255, + .pwm_period_ns = 33333, /* 30kHz */ +}; + +static struct platform_device pwm_backlight_device = { + .name = "pwm-backlight", + .dev = { + .platform_data = &pwm_backlight_data, + }, +}; + static struct fb_videomode lcdc0_mode = { .name = "AMPIER/AM-800480", .xres = 800, @@ -1030,6 +1075,8 @@ static struct i2c_board_info i2c2_devices[] = { */ static struct platform_device *eva_devices[] __initdata = { &lcdc0_device, + &pwm_device, + &pwm_backlight_device, &gpio_keys_device, &sh_eth_device, &vcc_sdhi0, @@ -1101,6 +1148,9 @@ static const struct pinctrl_map eva_pinctrl_map[] = { /* ST1232 */ PIN_MAP_MUX_GROUP_DEFAULT("0-0055", "pfc-r8a7740", "intc_irq10", "intc"), + /* TPU0 */ + PIN_MAP_MUX_GROUP_DEFAULT("renesas-tpu-pwm", "pfc-r8a7740", + "tpu0_to2_1", "tpu0"), /* USBHS */ PIN_MAP_MUX_GROUP_DEFAULT("renesas_usbhs", "pfc-r8a7740", "intc_irq7_1", "intc"), @@ -1154,13 +1204,13 @@ static void __init eva_init(void) ARRAY_SIZE(fixed3v3_power_consumers), 3300000); pinctrl_register_mappings(eva_pinctrl_map, ARRAY_SIZE(eva_pinctrl_map)); + pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup)); r8a7740_pinmux_init(); r8a7740_meram_workaround(); /* LCDC0 */ gpio_request_one(61, GPIOF_OUT_INIT_HIGH, NULL); /* LCDDON */ - gpio_request_one(202, GPIOF_OUT_INIT_LOW, NULL); /* LCD0_LED_CONT */ /* Touchscreen */ gpio_request_one(166, GPIOF_OUT_INIT_HIGH, NULL); /* TP_RST_B */ |