Hi Rob,
Thanks a lot for your review !
2016-02-09 1:15 GMT+01:00 Rob Herring <robh@xxxxxxxxxx>:
> On Mon, Feb 08, 2016 at 12:20:24PM +0100, Jean-Michel Hautbois wrote:
>> This device is a SPI based device from TI.
>> It is a 3 Gbps HD/SD SDI Dual Output Low Power
>> Extended Reach Adaptive Cable Equalizer.
>>
>> LMH0395 enables the use of up to two outputs.
>> These can be configured using DT.
>> The name gives the spi bus, and the CS associated.
>> Example : lmh0395-1@spi2
>> LMH0395 is on bus SPI2 with CS number 1.
>>
>> Controls should be accessible from userspace too.
>> This will have to be done later.
>
> Your line wrap should be ~72 columns.
You mean my current line wrap is too short ?
>> Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@xxxxxxxxxxxx>
>> ---
>> v2: Add DT support
>> v3: Change the bit set/clear in output_type as disabled means 'set the bit'
>> v4: Clearer description of endpoints usage in Doc, and some init changes.
>> Add a dependency on OF and don't test CONFIG_OF anymore.
>> v5: Change port description in Documentation
>> Multiple ports : required #address-cells and #size-cells
>> Alphabetical order for include files
>> Simplify register set/clear
>> Check device ID
>> Implement log_status handler
>> v6: Take Laurent Pinchart remarks into account
>> Correct register settings
>> Use next generation MC
>>
>> .../devicetree/bindings/media/spi/lmh0395.txt | 51 +++
>> MAINTAINERS | 6 +
>> drivers/media/Kconfig | 1 +
>> drivers/media/Makefile | 2 +-
>> drivers/media/spi/Kconfig | 15 +
>> drivers/media/spi/Makefile | 1 +
>> drivers/media/spi/lmh0395.c | 477 +++++++++++++++++++++
>> drivers/media/spi/lmh039x.h | 55 +++
>> 8 files changed, 607 insertions(+), 1 deletion(-)
>> create mode 100644 Documentation/devicetree/bindings/media/spi/lmh0395.txt
>> create mode 100644 drivers/media/spi/Kconfig
>> create mode 100644 drivers/media/spi/Makefile
>> create mode 100644 drivers/media/spi/lmh0395.c
>> create mode 100644 drivers/media/spi/lmh039x.h
>>
>> diff --git a/Documentation/devicetree/bindings/media/spi/lmh0395.txt b/Documentation/devicetree/bindings/media/spi/lmh0395.txt
>> new file mode 100644
>> index 0000000..5c6ab4a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/spi/lmh0395.txt
>> @@ -0,0 +1,51 @@
>> +* Texas Instruments lmh0395 3G HD/SD SDI equalizer
>> +
>> +"The LMH0395 is an SDI equalizer designed to extend the reach of SDI signals
>> +transmitted over cable by equalizing the input signal and generating clean
>> +outputs. It has one differential input and two differential output that can be
>> +independently controlled."
>> +
>> +Required Properties :
>> +- compatible: Must be "ti,lmh0395"
>
> You don't state this is a SPI device and uses standard SPI device
> properties.
Right, will add a word about this.
>> +
>> +The device node must contain one 'port' child node per device input and output
>> +port, in accordance with the video interface bindings defined in
>> +Documentation/devicetree/bindings/media/video-interfaces.txt.
>> +
>> +The LMH0395 has three ports numbered as follows.
>> +
>> + Port LMH0395
>> +------------------------------------------------------------
>> + SDI (SDI input) 0
>> + SDO0 (SDI output 0) 1
>> + SDO1 (SDI output 1) 2
>> +
>> +Example:
>> +
>> +ecspi@02010000 {
>
> s/ecspi/spi/ and drop the leading 0.
>
> Presumbly the dts you based this on was wrong.
I am using a i.MX6 platform, so yes, I based it on i.MX6 DTS files,
and it stated ecspi.
I will change it to make it more generic.
>> + ...
>> + ...
>> +
>> + lmh0395@1 {
>> + compatible = "ti,lmh0395";
>> + reg = <1>;
>> + spi-max-frequency = <20000000>;
>> + ports {
>> + port@0 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>
> These belong up one level in ports.
Yes, of course !
>> + reg = <0>;
>> + sdi0_in: endpoint {};
>> + };
>> + port@1 {
>> + reg = <1>;
>> + sdi0_out0: endpoint {};
>> + };
>> + port@2 {
>> + reg = <2>;
>> + /* endpoint not specified, disable output */
>> + };
>> + };
>> + };
>> + ...
>> +};
Thanks,
JM
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