ARM: OMAP: omap3beagle: Use the pwm_leds driver to control the PMU_STAT led

With the PWM backed driver the PMU_STAT led's brighness can be controlled.
This needs the new drivers for the TWL PWM/LED to work.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 909e7fa..2a6e8ad 100644 (file)
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -20,6 +20,8 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/leds.h>
+#include <linux/pwm.h>
+#include <linux/leds_pwm.h>
 #include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
@@ -55,6 +57,32 @@
 
 #define        NAND_CS 0
 
+static struct pwm_lookup pwm_lookup[] = {
+       /* LEDB -> PMU_STAT */
+       PWM_LOOKUP("twl-pwmled", 1, "leds_pwm", "beagleboard::pmu_stat"),
+};
+
+static struct led_pwm pwm_leds[] = {
+       {
+               .name           = "beagleboard::pmu_stat",
+               .max_brightness = 127,
+               .pwm_period_ns  = 7812500,
+       },
+};
+
+static struct led_pwm_platform_data pwm_data = {
+       .num_leds       = ARRAY_SIZE(pwm_leds),
+       .leds           = pwm_leds,
+};
+
+static struct platform_device leds_pwm = {
+       .name   = "leds_pwm",
+       .id     = -1,
+       .dev    = {
+               .platform_data = &pwm_data,
+       },
+};
+
 /*
  * OMAP3 Beagle revision
  * Run time detection of Beagle revision is done by reading GPIO.
@@ -292,9 +320,6 @@ static int beagle_twl_gpio_setup(struct device *dev,
        gpio_request_one(gpio + TWL4030_GPIO_MAX, beagle_config.usb_pwr_level,
                        "nEN_USB_PWR");
 
-       /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
-       gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;
-
        return 0;
 }
 
@@ -376,11 +401,6 @@ static struct gpio_led gpio_leds[] = {
                .default_trigger        = "mmc0",
                .gpio                   = 149,
        },
-       {
-               .name                   = "beagleboard::pmu_stat",
-               .gpio                   = -EINVAL,      /* gets replaced */
-               .active_low             = true,
-       },
 };
 
 static struct gpio_led_platform_data gpio_led_info = {
@@ -428,6 +448,7 @@ static struct platform_device *omap3_beagle_devices[] __initdata = {
        &leds_gpio,
        &keys_gpio,
        &madc_hwmon,
+       &leds_pwm,
 };
 
 static const struct usbhs_omap_board_data usbhs_bdata __initconst = {
@@ -532,6 +553,8 @@ static void __init omap3_beagle_init(void)
        /* Ensure SDRC pins are mux'd for self-refresh */
        omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
        omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
+
+       pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup));
 }
 
 MACHINE_START(OMAP3_BEAGLE, "OMAP3 Beagle Board")