RE: [PATCH 2/7] ARM: EXYNOS5: add machine specific support for backlight

[Jingoo Han <jg1.han@xxxxxxxxxxx>]

On July 11, 2012 6:11 PM, Leela Krishna Amudala <l.krishna@xxxxxxxxxxx> wrote:

> 
> Adds machine specific support for LCD backlight for SMDK board based
> on Exynos5
> 
> Signed-off-by: Leela Krishna Amudala <l.krishna@xxxxxxxxxxx>
> ---
>  arch/arm/mach-exynos/Kconfig           |    1 +
>  arch/arm/mach-exynos/mach-exynos5-dt.c |   28 ++++++++++++++++++++++++++++
>  2 files changed, 29 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
> index 498596b..a2a2940 100644
> --- a/arch/arm/mach-exynos/Kconfig
> +++ b/arch/arm/mach-exynos/Kconfig
> @@ -412,6 +412,7 @@ config MACH_EXYNOS5_DT
>  	select SOC_EXYNOS5250
>  	select USE_OF
>  	select ARM_AMBA
> +	select SAMSUNG_DEV_BACKLIGHT
>  	help
>  	  Machine support for Samsung Exynos4 machine with device tree enabled.
>  	  Select this if a fdt blob is available for the EXYNOS4 SoC based board.
> diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
> index 7b1e11a..0a200fd 100644
> --- a/arch/arm/mach-exynos/mach-exynos5-dt.c
> +++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
> @@ -11,6 +11,8 @@
> 
>  #include <linux/of_platform.h>
>  #include <linux/serial_core.h>
> +#include <linux/pwm_backlight.h>
> +#include <linux/gpio.h>
> 
>  #include <asm/mach/arch.h>
>  #include <asm/hardware/gic.h>
> @@ -18,9 +20,34 @@
> 
>  #include <plat/cpu.h>
>  #include <plat/regs-serial.h>
> +#include <plat/backlight.h>
> +#include <plat/gpio-cfg.h>
> 
>  #include "common.h"
> 
> +

Delete this useless line.

> +static int smdk5250_bl_notify(struct device *unused, int brightness)
> +{
> +	/* manage lcd_bl_en signal */
> +	if (brightness)
> +		gpio_set_value(EXYNOS5_GPX3(0), 1);
> +	else
> +		gpio_set_value(EXYNOS5_GPX3(0), 0);
> +
> +	return brightness;
> +}
> +
> +/* LCD Backlight data */
> +static struct samsung_bl_gpio_info smdk5250_bl_gpio_info = {
> +	.no	= EXYNOS5_GPB2(0),
> +	.func	= S3C_GPIO_SFN(2),
> +};
> +
> +static struct platform_pwm_backlight_data smdk5250_bl_data = {
> +	.pwm_period_ns	= 1000000,
> +	.notify		= smdk5250_bl_notify,
> +};
> +
>  /*
>   * The following lookup table is used to override device names when devices
>   * are registered from device tree. This is temporarily added to enable
> @@ -61,6 +88,7 @@ static void __init exynos5250_dt_map_io(void)
> 
>  static void __init exynos5250_dt_machine_init(void)
>  {
> +	samsung_bl_set(&smdk5250_bl_gpio_info, &smdk5250_bl_data);
>  	of_platform_populate(NULL, of_default_bus_match_table,
>  				exynos5250_auxdata_lookup, NULL);
>  }
> --
> 1.7.0.4
> 
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