[1/3] media: dt-bindings: media: meson-ao-cec: Add G12A AO-CEC-B Compatible
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Message ID 20190325173501.22863-2-narmstrong@baylibre.com
State New
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  • media: platform: Add support for the Amlogic Meson G12A AO CEC Controller
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Commit Message

Neil Armstrong March 25, 2019, 5:34 p.m. UTC
The Amlogic G12A embeds a second CEC controller named AO-CEC-B, and
the other one is AO-CEC-A described by the current bindings.

The registers interface is very close but the internal architecture
is totally different.

The other difference is the closk source, the AO-CEC-B takes the
"oscin", the Always-On Oscillator clock, as input and embeds a
dual-divider clock divider to provide the precise 32768Hz base
clock for CEC communication.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 .../devicetree/bindings/media/meson-ao-cec.txt    | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

Comments

Hans Verkuil March 27, 2019, 12:39 p.m. UTC | #1
On 3/25/19 6:34 PM, Neil Armstrong wrote:
> The Amlogic G12A embeds a second CEC controller named AO-CEC-B, and
> the other one is AO-CEC-A described by the current bindings.
> 
> The registers interface is very close but the internal architecture

registers -> register

> is totally different.
> 
> The other difference is the closk source, the AO-CEC-B takes the

closk -> clock

> "oscin", the Always-On Oscillator clock, as input and embeds a
> dual-divider clock divider to provide the precise 32768Hz base
> clock for CEC communication.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  .../devicetree/bindings/media/meson-ao-cec.txt    | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/meson-ao-cec.txt b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
> index 8671bdb08080..d6e2f9cf0aaf 100644
> --- a/Documentation/devicetree/bindings/media/meson-ao-cec.txt
> +++ b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
> @@ -4,16 +4,23 @@ The Amlogic Meson AO-CEC module is present is Amlogic SoCs and its purpose is
>  to handle communication between HDMI connected devices over the CEC bus.
>  
>  Required properties:
> -  - compatible : value should be following
> -	"amlogic,meson-gx-ao-cec"
> +  - compatible : value should be following depending on the SoC :
> +  	For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
> +  	"amlogic,meson-gx-ao-cec"
> +	For G12A (AO_CEC_B module) :
> +	"amlogic,meson-g12a-ao-cec"

The driver uses "amlogic,meson-g12a-ao-cec-b", so there is a mismatch between
the bindings and the driver.

Please repost since it is important that the two correspond.

Thanks!

	Hans

>  
>    - reg : Physical base address of the IP registers and length of memory
>  	  mapped region.
>  
>    - interrupts : AO-CEC interrupt number to the CPU.
>    - clocks : from common clock binding: handle to AO-CEC clock.
> -  - clock-names : from common clock binding: must contain "core",
> -		  corresponding to entry in the clocks property.
> +  - clock-names : from common clock binding, must contain :
> +		For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
> +		- "core"
> +		For G12A (AO_CEC_B module) :
> +		- "oscin"
> +		corresponding to entry in the clocks property.
>    - hdmi-phandle: phandle to the HDMI controller
>  
>  Example:
>
Neil Armstrong March 27, 2019, 1:08 p.m. UTC | #2
On 27/03/2019 13:39, Hans Verkuil wrote:
> On 3/25/19 6:34 PM, Neil Armstrong wrote:
>> The Amlogic G12A embeds a second CEC controller named AO-CEC-B, and
>> the other one is AO-CEC-A described by the current bindings.
>>
>> The registers interface is very close but the internal architecture
> 
> registers -> register
> 
>> is totally different.
>>
>> The other difference is the closk source, the AO-CEC-B takes the
> 
> closk -> clock
> 
>> "oscin", the Always-On Oscillator clock, as input and embeds a
>> dual-divider clock divider to provide the precise 32768Hz base
>> clock for CEC communication.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>> ---
>>  .../devicetree/bindings/media/meson-ao-cec.txt    | 15 +++++++++++----
>>  1 file changed, 11 insertions(+), 4 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/media/meson-ao-cec.txt b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
>> index 8671bdb08080..d6e2f9cf0aaf 100644
>> --- a/Documentation/devicetree/bindings/media/meson-ao-cec.txt
>> +++ b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
>> @@ -4,16 +4,23 @@ The Amlogic Meson AO-CEC module is present is Amlogic SoCs and its purpose is
>>  to handle communication between HDMI connected devices over the CEC bus.
>>  
>>  Required properties:
>> -  - compatible : value should be following
>> -	"amlogic,meson-gx-ao-cec"
>> +  - compatible : value should be following depending on the SoC :
>> +  	For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
>> +  	"amlogic,meson-gx-ao-cec"
>> +	For G12A (AO_CEC_B module) :
>> +	"amlogic,meson-g12a-ao-cec"
> 
> The driver uses "amlogic,meson-g12a-ao-cec-b", so there is a mismatch between
> the bindings and the driver.
> 
> Please repost since it is important that the two correspond.

Indeed, thanks for spotting this, I'll fix the typos and the compatible in v2

Neil

> 
> Thanks!
> 
> 	Hans
> 
>>  
>>    - reg : Physical base address of the IP registers and length of memory
>>  	  mapped region.
>>  
>>    - interrupts : AO-CEC interrupt number to the CPU.
>>    - clocks : from common clock binding: handle to AO-CEC clock.
>> -  - clock-names : from common clock binding: must contain "core",
>> -		  corresponding to entry in the clocks property.
>> +  - clock-names : from common clock binding, must contain :
>> +		For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
>> +		- "core"
>> +		For G12A (AO_CEC_B module) :
>> +		- "oscin"
>> +		corresponding to entry in the clocks property.
>>    - hdmi-phandle: phandle to the HDMI controller
>>  
>>  Example:
>>
>

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/media/meson-ao-cec.txt b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
index 8671bdb08080..d6e2f9cf0aaf 100644
--- a/Documentation/devicetree/bindings/media/meson-ao-cec.txt
+++ b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
@@ -4,16 +4,23 @@  The Amlogic Meson AO-CEC module is present is Amlogic SoCs and its purpose is
 to handle communication between HDMI connected devices over the CEC bus.
 
 Required properties:
-  - compatible : value should be following
-	"amlogic,meson-gx-ao-cec"
+  - compatible : value should be following depending on the SoC :
+  	For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
+  	"amlogic,meson-gx-ao-cec"
+	For G12A (AO_CEC_B module) :
+	"amlogic,meson-g12a-ao-cec"
 
   - reg : Physical base address of the IP registers and length of memory
 	  mapped region.
 
   - interrupts : AO-CEC interrupt number to the CPU.
   - clocks : from common clock binding: handle to AO-CEC clock.
-  - clock-names : from common clock binding: must contain "core",
-		  corresponding to entry in the clocks property.
+  - clock-names : from common clock binding, must contain :
+		For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
+		- "core"
+		For G12A (AO_CEC_B module) :
+		- "oscin"
+		corresponding to entry in the clocks property.
   - hdmi-phandle: phandle to the HDMI controller
 
 Example: