[v2] gpio: samsung: add devicetree init for s3c24xx arches

Commit Message

Kim Kukjin Sept. 7, 2012, 5:38 a.m. UTC

Heiko Stübner wrote:
> 
> Until now the Exynos-SoC was the only Samsung-SoC supporting the GPIOs
> via the device tree. This patch implements dt-support for the
> s3c24xx arches.
> 
> The controllers contain only 3 cells, as the underlying gpio controller
> does not support controlling the drive strength on a gpio level.
> 
> Tested with the gpio-keys driver on a s3c2416 based machine.
> 
> Signed-off-by: Heiko Stuebner <[e-mail]>
> Reviewed-by: Thomas Abraham <[e-mail]>
> ---

[...]

> +#if defined(CONFIG_PLAT_S3C24XX) && defined(CONFIG_OF)

[...]

> +static __init void s3c24xx_gpiolib_attach_ofnode(struct samsung_gpio_chip
> *chip,
> +						 u64 base, u64 offset)
> +{

[...]

> +}
> +#elif defined(CONFIG_PLAT_S3C24XX)

Heiko, above line breaks building for other samsung stuff except s3c24xx. I fixed with following which has been amended in your patch. If any problems, please let me know.

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <[e-mail]>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.


> +static __init void s3c24xx_gpiolib_attach_ofnode(struct samsung_gpio_chip
> *chip,
> +						 u64 base, u64 offset)
> +{
> +	return;
> +}
> +#endif /* defined(CONFIG_PLAT_S3C24XX) && defined(CONFIG_OF) */
> +
>  static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip
> *chip,
>  					     int nr_chips, void __iomem *base)
>  {
> @@ -962,6 +1023,8 @@ static void __init s3c24xx_gpiolib_add_chips(struct
> samsung_gpio_chip *chip,
>  			gc->direction_output = samsung_gpiolib_2bit_output;
> 
>  		samsung_gpiolib_add(chip);
> +
> +		s3c24xx_gpiolib_attach_ofnode(chip, S3C24XX_PA_GPIO, i *
> 0x10);
>  	}
>  }
> 
> --
> 1.7.2.3

Comments

Heiko Stübner Sept. 7, 2012, 7:27 a.m. UTC | #1

Am Freitag, 7. September 2012, 07:38:52 schrieb Kukjin Kim:
> Heiko Stübner wrote:
> > Until now the Exynos-SoC was the only Samsung-SoC supporting the GPIOs
> > via the device tree. This patch implements dt-support for the
> > s3c24xx arches.
> > 
> > The controllers contain only 3 cells, as the underlying gpio controller
> > does not support controlling the drive strength on a gpio level.
> > 
> > Tested with the gpio-keys driver on a s3c2416 based machine.
> > 
> > Signed-off-by: Heiko Stuebner <[e-mail]>
> > Reviewed-by: Thomas Abraham <[e-mail]>
> > ---
> 
> [...]
> 
> > +#if defined(CONFIG_PLAT_S3C24XX) && defined(CONFIG_OF)
> 
> [...]
> 
> > +static __init void s3c24xx_gpiolib_attach_ofnode(struct
> > samsung_gpio_chip *chip,
> > +						 u64 base, u64 offset)
> > +{
> 
> [...]
> 
> > +}
> > +#elif defined(CONFIG_PLAT_S3C24XX)
> 
> Heiko, above line breaks building for other samsung stuff except s3c24xx. I
> fixed with following which has been amended in your patch. If any
> problems, please let me know.

yeah, I see the problem now. Thanks for the fix and sorry to have caused 
additional work.


Heiko

Patch

diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index 5dcdcda..a006f0d 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -991,7 +991,7 @@  static __init void s3c24xx_gpiolib_attach_ofnode(struct samsun
 	gc->of_gpio_n_cells = 3;
 	gc->of_xlate = s3c24xx_gpio_xlate;
 }
-#elif defined(CONFIG_PLAT_S3C24XX)
+#else
 static __init void s3c24xx_gpiolib_attach_ofnode(struct samsung_gpio_chip *chip,
 						u64 base, u64 offset)
 {