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Commit d58226a2 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Simon Horman
Browse files

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: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: default avatarSimon Horman <horms@verge.net.au>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent ad81f054

arch/arm/mach-shmobile/board-armadillo800eva.c

+52 −2
Original line number Diff line number Diff line
@@ -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 */