Re: [PATCH v2 2/4] ARM: dts: exynos: Use 'hpd-gpios' instead of 'hpd-gpio'

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 08/24/2016 04:25 AM, Milo Kim wrote:
> This patch enables getting a HPD GPIO descriptor quickly.
> The exynos-hdmi driver uses "hpd" for HDMI hot plug detection.
>
> 	static int hdmi_resources_init(struct hdmi_context *hdata)
> 	{
> 		...
> 		hdata->hpd_gpio = devm_gpiod_get(dev, "hpd", GPIOD_IN);
> 		...
> 	}
>
> This calls 'of_find_gpio()' and it generates the GPIO consumer ID by referring
> GPIO suffix. So 'hpd-gpios' is preferred on getting a GPIO descriptor.
>
> However, if the device tree uses 'hpd-gpio', then the exynos-hdmi driver
> always retries to get a GPIO descriptor because the first GPIO suffix is not
> 'gpio' but 'gpios'. So you always see the debug message below.
>
> 	of_get_named_gpiod_flags: can't parse 'hpd-gpios' property of node '/soc/hdmi@14530000[0]'
>
> Use the preferred property, 'hpd-gpios' instead of 'hpd-gpio'.
>
> Acked-by: Rob Herring <robh@xxxxxxxxxx>
> Cc: Kukjin Kim <kgene@xxxxxxxxxx>
> Cc: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Inki Dae <inki.dae@xxxxxxxxxxx>
> Cc: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> Cc: Seung-Woo Kim <sw0312.kim@xxxxxxxxxxx>
> Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-samsung-soc@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Milo Kim <woogyom.kim@xxxxxxxxx>
I am not sure if this long Cc list is necessary.
Anyway:

Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
--
Regards
Andrzej

--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux SoC Development]     [Linux Rockchip Development]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Linux SCSI]     [Yosemite News]

  Powered by Linux