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@xxxxxxxxxxxxxxxx>
Tested-by: Simon Horman <horms@xxxxxxxxxxxx>
---
arch/arm/mach-shmobile/board-armadillo800eva.c | 51 +++++++++++++++++++++++++-
1 file changed, 49 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-shmobile/board-armadillo800eva.c b/arch/arm/mach-shmobile/board-armadillo800eva.c
index ff04d1e..fca1817 100644
--- a/arch/arm/mach-shmobile/board-armadillo800eva.c
+++ b/arch/arm/mach-shmobile/board-armadillo800eva.c
@@ -30,6 +30,8 @@
#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>
@@ -381,7 +383,48 @@ 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] = {
+ .enabled = true,
+ .active_low = 1,
+ }
+};
+
+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,
+};
+
+/* LCDC and backlight */
+static struct platform_pwm_backlight_data pwm_backlight_data = {
+ .pwm_id = TPU_PWM_ID(0, 2),
+ .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,
@@ -1019,6 +1062,8 @@ 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,
@@ -1090,6 +1135,9 @@ 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"),
@@ -1149,7 +1197,6 @@ static void __init eva_init(void)
/* 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 */
--
1.8.1.5
--
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