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ARM: shmobile: armadillo800eva: Add backlight support

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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>
This commit is contained in:
Laurent Pinchart 2013-07-16 12:32:05 +02:00 committed by Simon Horman
parent ad81f0545e
commit d58226a21a
1 changed files with 52 additions and 2 deletions
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54
arch/arm/mach-shmobile/board-armadillo800eva.c
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@ -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 */