On Thu, Jan 25, 2018 at 10:07:45AM +0100, Code Kipper wrote:
> On 25 January 2018 at 09:29, Maxime Ripard
> <maxime.ripard@xxxxxxxxxxxxxxxxxx> wrote:
> > On Wed, Jan 24, 2018 at 12:39:31PM +0100, Code Kipper wrote:
> >> On 24 January 2018 at 12:02, Maxime Ripard
> >> <maxime.ripard@xxxxxxxxxxxxxxxxxx> wrote:
> >> > Hi,
> >> >
> >> > On Wed, Jan 24, 2018 at 11:39:43AM +0100, codekipper@xxxxxxxxx wrote:
> >> >> From: Marcus Cooper <codekipper@xxxxxxxxx>
> >> >>
> >> >> Add the DAI blocks to the device tree. I2S0 and I2S1 are for
> >> >> connecting to an external codec.
> >> >>
> >> >> Signed-off-by: Marcus Cooper <codekipper@xxxxxxxxx>
> >> >> ---
> >> >> arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 26 ++++++++++++++++++++++++++
> >> >> 1 file changed, 26 insertions(+)
> >> >>
> >> >> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> >> >> index f060a58f374c..f3354f8c2026 100644
> >> >> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> >> >> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> >> >> @@ -419,6 +419,32 @@
> >> >> status = "disabled";
> >> >> };
> >> >>
> >> >> + i2s0: i2s@1c22000 {
> >> >> + #sound-dai-cells = <0>;
> >> >> + compatible = "allwinner,sun8i-h3-i2s";
> >> >
> >> > Same remark than for the spdif, please add a soc-specific compatible.
> >>
> >> Is that really necessary?..
> >
> > Yes.
> >
> >> for example on the a20 the functionality of the i2s is the same as
> >> the a10 so it is down as "allwinner,sun4i-a10-i2s", likewise here
> >> it's the same as the changes required for the H3. I was planning on
> >> using the compatible "allwinner,sun50i-a64-i2s" for the audio codec
> >> as there are some quirks that need to be addressed.
> >
> > And this is exactly why it is necessary. If we ever find a quirk in
> > the future, supporting that quirk will be smooth if we already have a
> > compatible for that SoC in the DT, and a pain if we don't.
>
> ACK, but is there any reason why we're not doing this for i2c?
We try to do that for all the IPs, but some fell through the cracks.
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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