[PATCH v2] ARM: davinci: Add the clock for the CPPI 4.1 DMA engine

[Alexandre Bailon]

On 04/07/2017 04:36 PM, Sekhar Nori wrote:
> On Wednesday 05 April 2017 10:47 PM, Alexandre Bailon wrote:
>> The CPPI 4.1 DMA is sharing its clock with the USB OTG,
>> and most of the time, the clock will be enabled by USB.
>> But during the init of the DMA, USB is not enabled (waiting for DMA),
>> and then we must enable the clock before doing anything.
>> Add the clock for the CPPI 4.1 DMA engine.
>>
>> Signed-off-by: Alexandre Bailon <abailon at baylibre.com>
>> ---
>>   arch/arm/mach-davinci/da830.c | 6 ++++++
>>   arch/arm/mach-davinci/da850.c | 6 ++++++
>>   2 files changed, 12 insertions(+)
>>
>> diff --git a/arch/arm/mach-davinci/da830.c b/arch/arm/mach-davinci/da830.c
>> index 073c458..bd88470 100644
>> --- a/arch/arm/mach-davinci/da830.c
>> +++ b/arch/arm/mach-davinci/da830.c
>> @@ -304,6 +304,11 @@ static struct clk usb20_clk = {
>>   	.gpsc		= 1,
>>   };
>>   
>> +static struct clk cppi41_clk = {
>> +	.name		= "cppi41",
>> +	.parent		= &usb20_clk,
>> +};
>> +
>>   static struct clk aemif_clk = {
>>   	.name		= "aemif",
>>   	.parent		= &pll0_sysclk3,
>> @@ -413,6 +418,7 @@ static struct clk_lookup da830_clks[] = {
>>   	CLK("davinci-mcasp.1",	NULL,		&mcasp1_clk),
>>   	CLK("davinci-mcasp.2",	NULL,		&mcasp2_clk),
>>   	CLK("musb-da8xx",	"usb20",	&usb20_clk),
>> +	CLK("cppi41-dmaengine",	NULL,		&cppi41_clk),
> I dont see this device name being used in current linux-next. Is this
> name accepted ?
There is here a typo. The name should be cppi41-dma-engine.
I will fix it.
>
> The patch otherwise looks okay.
>
> Thanks,
> Sekhar
Thanks,
Alexandre