[PATCH] ARM: dts: imx6qdl: Fix SPDIF regression

[PATCH] ARM: dts: imx6qdl: Fix SPDIF regression

[Fabio Estevam]

Commit 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
changed many more clocks than only the SPDIF core clock as stated in
the commit message.

The MLB clock has been added and this causes SPDIF regression as
reported by Xavi Drudis Ferran and also in this forum post:
https://forum.digikey.com/thread/34240

The MX6Q Reference Manual does not mention that MLB is a clock related
to SPDIF, so change it back to a dummy clock to restore SPDIF
functionality.

Thanks to Ambika for providing the fix at:
https://community.nxp.com/thread/387131

Fixes: 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
Cc: <stable@vger.kernel.org> # 4.4.x
Reported-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
---
 arch/arm/boot/dts/imx6qdl.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index b620ac8..b13b0b2 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -243,7 +243,7 @@
 					clocks = <&clks IMX6QDL_CLK_SPDIF_GCLK>, <&clks IMX6QDL_CLK_OSC>,
 						 <&clks IMX6QDL_CLK_SPDIF>, <&clks IMX6QDL_CLK_ASRC>,
 						 <&clks IMX6QDL_CLK_DUMMY>, <&clks IMX6QDL_CLK_ESAI_EXTAL>,
-						 <&clks IMX6QDL_CLK_IPG>, <&clks IMX6QDL_CLK_MLB>,
+						 <&clks IMX6QDL_CLK_IPG>, <&clks IMX6QDL_CLK_DUMMY>,
 						 <&clks IMX6QDL_CLK_DUMMY>, <&clks IMX6QDL_CLK_SPBA>;
 					clock-names = "core",  "rxtx0",
 						      "rxtx1", "rxtx2",
-- 
1.9.1

[PATCH] ARM: dts: imx6qdl: Fix SPDIF regression

[Xavi Drudis Ferran]

El Wed, Aug 31, 2016 at 10:56:48AM -0300, Fabio Estevam deia:
> Commit 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
> changed many more clocks than only the SPDIF core clock as stated in
> the commit message.
> 
> The MLB clock has been added and this causes SPDIF regression as
> reported by Xavi Drudis Ferran and also in this forum post:
> https://forum.digikey.com/thread/34240
> 
> The MX6Q Reference Manual does not mention that MLB is a clock related
> to SPDIF, so change it back to a dummy clock to restore SPDIF
> functionality.
> 
> Thanks to Ambika for providing the fix at:
> https://community.nxp.com/thread/387131
> 
> Fixes: 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
> Cc: <stable@vger.kernel.org> # 4.4.x
> Reported-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
> ---
>  arch/arm/boot/dts/imx6qdl.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
> index b620ac8..b13b0b2 100644
> --- a/arch/arm/boot/dts/imx6qdl.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl.dtsi
> @@ -243,7 +243,7 @@
>  					clocks = <&clks IMX6QDL_CLK_SPDIF_GCLK>, <&clks IMX6QDL_CLK_OSC>,
>  						 <&clks IMX6QDL_CLK_SPDIF>, <&clks IMX6QDL_CLK_ASRC>,
>  						 <&clks IMX6QDL_CLK_DUMMY>, <&clks IMX6QDL_CLK_ESAI_EXTAL>,
> -						 <&clks IMX6QDL_CLK_IPG>, <&clks IMX6QDL_CLK_MLB>,
> +						 <&clks IMX6QDL_CLK_IPG>, <&clks IMX6QDL_CLK_DUMMY>,
>  						 <&clks IMX6QDL_CLK_DUMMY>, <&clks IMX6QDL_CLK_SPBA>;
>  					clock-names = "core",  "rxtx0",
>  						      "rxtx1", "rxtx2",
> -- 
> 1.9.1
> 

Tested-by:  Xavi Drudis Ferran <xdrudis@tinet.cat>

(on linux-libre-4.7, wandboard-quad-rev-b1, imx6q MCIMX6Q5EYM10AC ,according to wandboard manual BOM)
Before the change I didn't hear output on spdif, after the change output sounds ok. 

[PATCH] ARM: dts: imx6qdl: Fix SPDIF regression

[Shawn Guo]

On Wed, Aug 31, 2016 at 10:56:48AM -0300, Fabio Estevam wrote:
> Commit 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
> changed many more clocks than only the SPDIF core clock as stated in
> the commit message.
> 
> The MLB clock has been added and this causes SPDIF regression as
> reported by Xavi Drudis Ferran and also in this forum post:
> https://forum.digikey.com/thread/34240
> 
> The MX6Q Reference Manual does not mention that MLB is a clock related
> to SPDIF, so change it back to a dummy clock to restore SPDIF
> functionality.
> 
> Thanks to Ambika for providing the fix at:
> https://community.nxp.com/thread/387131
> 
> Fixes: 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
> Cc: <stable@vger.kernel.org> # 4.4.x
> Reported-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

Applied, thanks.