On Wed, Apr 06, 2016 at 04:38:22PM +0800, Sugar Zhang wrote:
> There are 3 i2s sdio pins, which iomux mode is as follows:
s/i2s sdio/I2S\/SDIO muxed/
>
> - sdi3_sdo1
> - sdi2_sdo2
> - sdi1_sdo3
>
> we need to configure these pins' iomux mode via the GRF register
> when use multi channel playback/capture.
Why not a pinctrl binding here? If you want SDIO mode, then you need
similar code in the SDIO driver (or just rely on default mode).
>
> Signed-off-by: Sugar Zhang <sugar.zhang@xxxxxxxxxxxxxx>
> ---
>
> .../devicetree/bindings/sound/rockchip-i2s.txt | 5 +++
> sound/soc/rockchip/rockchip_i2s.c | 39 +++++++++++++++++++++-
> sound/soc/rockchip/rockchip_i2s.h | 8 +++++
> 3 files changed, 51 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
> index 6e86d8a..ad72a7d 100644
> --- a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
> +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
> @@ -23,6 +23,11 @@ Required properties:
> - rockchip,playback-channels: max playback channels, if not set, 8 channels default.
> - rockchip,capture-channels: max capture channels, if not set, 2 channels default.
>
> +Required properties for controller which support multi channels playback/capture:
> +
> +- rockchip,grf: Should be phandle/offset pair. the phandle of the syscon node for GRF register,
Wrap your lines at less than 80 chars.
> + and the offset of the GRF for control register.
> +
> Example for rk3288 I2S controller:
>
> i2s@ff890000 {
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