New PWM drivers are being prepared for twl series which will enable the use of all PWMs (PWMs and LEDs). They are implemented as generic PWM drivers to be able to use them for different purposes. The current platform code was broken: the leds_pwm driver was not able to pick up the PWM since the pwm_id was incorrect. With the other patches we will be able to control the followings: LCD backlight via pwm-backlight driver Keypad leds via leds_pwm driver as normal LED Charging indicator via leds_pwm driver as normal LED Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx> --- Hello, This patch needs the following series to work: - twl regmap IO conversion series: http://lkml.org/lkml/2012/11/13/97 - PWM drivers for twl4030/6030 (v2): https://lkml.org/lkml/2012/11/8/219 - leds-pwm series (v2): https://lkml.org/lkml/2012/11/12/222 With these in place we can have keypad light and LCD backlight working on Blaze when booting in legacy mode. I will send the DT patches after the leds-pwm DT support has been accepted. Regards, Peter arch/arm/mach-omap2/board-4430sdp.c | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c index 3669c12..8cf781e 100644 --- a/arch/arm/mach-omap2/board-4430sdp.c +++ b/arch/arm/mach-omap2/board-4430sdp.c @@ -24,8 +24,10 @@ #include <linux/gpio_keys.h> #include <linux/regulator/machine.h> #include <linux/regulator/fixed.h> +#include <linux/pwm.h> #include <linux/leds.h> #include <linux/leds_pwm.h> +#include <linux/pwm_backlight.h> #include <linux/platform_data/omap4-keypad.h> #include <asm/hardware/gic.h> @@ -263,10 +265,20 @@ static struct gpio_led_platform_data sdp4430_led_data = { .num_leds = ARRAY_SIZE(sdp4430_gpio_leds), }; +static struct pwm_lookup sdp4430_pwm_lookup[] = { + PWM_LOOKUP("twl-pwm", 0, "leds_pwm", "omap4::keypad"), + PWM_LOOKUP("twl-pwm", 1, "pwm-backlight", "backlight"), + PWM_LOOKUP("twl-pwmled", 0, "leds_pwm", "omap4:green:chrg"), +}; + static struct led_pwm sdp4430_pwm_leds[] = { { + .name = "omap4::keypad", + .max_brightness = 127, + .pwm_period_ns = 7812500, + }, + { .name = "omap4:green:chrg", - .pwm_id = 1, .max_brightness = 255, .pwm_period_ns = 7812500, }, @@ -285,6 +297,21 @@ static struct platform_device sdp4430_leds_pwm = { }, }; +static struct platform_pwm_backlight_data sdp4430_backlight_data = { + .pwm_id = 1, + .max_brightness = 127, + .dft_brightness = 127, + .pwm_period_ns = 7812500, +}; + +static struct platform_device sdp4430_backlight_pwm = { + .name = "pwm-backlight", + .id = -1, + .dev = { + .platform_data = &sdp4430_backlight_data, + }, +}; + static int omap_prox_activate(struct device *dev) { gpio_set_value(OMAP4_SFH7741_ENABLE_GPIO , 1); @@ -419,6 +446,7 @@ static struct platform_device *sdp4430_devices[] __initdata = { &sdp4430_gpio_keys_device, &sdp4430_leds_gpio, &sdp4430_leds_pwm, + &sdp4430_backlight_pwm, &sdp4430_vbat, &sdp4430_dmic_codec, &sdp4430_abe_audio, @@ -862,6 +890,7 @@ static void __init omap_4430sdp_init(void) ARRAY_SIZE(sdp4430_spi_board_info)); } + pwm_add_table(sdp4430_pwm_lookup, ARRAY_SIZE(sdp4430_pwm_lookup)); status = omap4_keyboard_init(&sdp4430_keypad_data, &keypad_data); if (status) pr_err("Keypad initialization failed: %d\n", status); -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
