[PATCH 2/2] ARM: mx53/loco: add pwm backlight device

[Eric Miao]

On Tue, Aug 30, 2011 at 3:52 PM,  <jason.chen at freescale.com> wrote:
> From: Jason Chen <b02280 at freescale.com>
>
> Signed-off-by: Jason Chen <b02280 at freescale.com>
> Signed-off-by: Jason Chen <jason.chen at linaro.org>
> ---
>  arch/arm/mach-mx5/Kconfig           |    1 +
>  arch/arm/mach-mx5/board-mx53_loco.c |   11 +++++++++++
>  arch/arm/mach-mx5/devices-imx53.h   |    4 ++++
>  3 files changed, 16 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-mx5/Kconfig b/arch/arm/mach-mx5/Kconfig
> index b4e7c58..1463cd3 100644
> --- a/arch/arm/mach-mx5/Kconfig
> +++ b/arch/arm/mach-mx5/Kconfig
> @@ -202,6 +202,7 @@ config MACH_MX53_LOCO
>        select IMX_HAVE_PLATFORM_IMX2_WDT
>        select IMX_HAVE_PLATFORM_IMX_I2C
>        select IMX_HAVE_PLATFORM_IMX_UART
> +       select IMX_HAVE_PLATFORM_MXC_PWM
>        select IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
>        select IMX_HAVE_PLATFORM_GPIO_KEYS
>        select LEDS_GPIO_REGISTER
> diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
> index 4e1d51d..e2d916d 100644
> --- a/arch/arm/mach-mx5/board-mx53_loco.c
> +++ b/arch/arm/mach-mx5/board-mx53_loco.c
> @@ -22,6 +22,7 @@
>  #include <linux/clk.h>
>  #include <linux/delay.h>
>  #include <linux/gpio.h>
> +#include <linux/pwm_backlight.h>
>
>  #include <mach/common.h>
>  #include <mach/hardware.h>
> @@ -257,6 +258,13 @@ static const struct gpio_led_platform_data mx53loco_leds_data __initconst = {
>        .num_leds       = ARRAY_SIZE(mx53loco_leds),
>  };
>
> +static struct platform_pwm_backlight_data loco_pwm_backlight_data = {
> +       .pwm_id = 1,
> +       .max_brightness = 255,
> +       .dft_brightness = 128,
> +       .pwm_period_ns = 50000,
> +};
> +
>  static void __init mx53_loco_board_init(void)
>  {
>        imx53_soc_init();
> @@ -273,6 +281,9 @@ static void __init mx53_loco_board_init(void)
>        imx53_add_sdhci_esdhc_imx(2, &mx53_loco_sd3_data);
>        imx_add_gpio_keys(&loco_button_data);
>        gpio_led_register_device(-1, &mx53loco_leds_data);
> +
> +       imx53_add_mxc_pwm(1);
> +       imx53_add_mxc_pwm_backlight(0, &loco_pwm_backlight_data);
>  }
>
>  static void __init mx53_loco_timer_init(void)
> diff --git a/arch/arm/mach-mx5/devices-imx53.h b/arch/arm/mach-mx5/devices-imx53.h
> index 258e68f..2aa8ef8 100644
> --- a/arch/arm/mach-mx5/devices-imx53.h
> +++ b/arch/arm/mach-mx5/devices-imx53.h
> @@ -44,3 +44,7 @@ extern const struct imx_imx_keypad_data imx53_imx_keypad_data;
>  extern const struct imx_mxc_pwm_data imx53_mxc_pwm_data[] __initconst;
>  #define imx53_add_mxc_pwm(id)  \
>        imx_add_mxc_pwm(&imx53_mxc_pwm_data[id])
> +
> +#define imx53_add_mxc_pwm_backlight(id, pdata)                 \
> +       platform_device_register_resndata(NULL, "pwm-backlight",\
> +                       id, NULL, 0, pdata, sizeof(*pdata));

This could be made more generic like imx_add_pwm_backlight()? So
that other boards can make use of the same API as well.