Re: [PATCH v2 2/3] iio: adc: sun20i-gpadc: add A523 gpadc support

[Andre Przywara <andre.przywara@arm.com>]

Hi Sanjay,

thanks for having a look!

On 5/13/26 13:44, Sanjay Chitroda wrote:
> 
> 
> On 13 May 2026 10:29:43 am IST, Michal Piekos <michal.piekos@mmpsystems.pl> wrote:
>> A523 differs from existing sun20i-gpadc-iio by having two clocks; bus
>> clock and module clock.
>>
>> Change driver to enable all clocks.
>>
>> Signed-off-by: Michal Piekos <michal.piekos@mmpsystems.pl>
>> ---
>> drivers/iio/adc/sun20i-gpadc-iio.c | 11 +++++++----
>> 1 file changed, 7 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/iio/adc/sun20i-gpadc-iio.c b/drivers/iio/adc/sun20i-gpadc-iio.c
>> index 861c14da75ad..3f1f07b3a385 100644
>> --- a/drivers/iio/adc/sun20i-gpadc-iio.c
>> +++ b/drivers/iio/adc/sun20i-gpadc-iio.c
>> @@ -180,7 +180,7 @@ static int sun20i_gpadc_probe(struct platform_device *pdev)
>> 	struct iio_dev *indio_dev;
>> 	struct sun20i_gpadc_iio *info;
>> 	struct reset_control *rst;
>> -	struct clk *clk;
>> +	struct clk_bulk_data *clks;
>> 	int irq;
>> 	int ret;
>>
>> @@ -205,9 +205,11 @@ static int sun20i_gpadc_probe(struct platform_device *pdev)
>> 	if (IS_ERR(info->regs))
>> 		return PTR_ERR(info->regs);
>>
>> -	clk = devm_clk_get_enabled(dev, NULL);
>> -	if (IS_ERR(clk))
>> -		return dev_err_probe(dev, PTR_ERR(clk), "failed to enable bus clock\n");
>> +	ret = devm_clk_bulk_get_all_enabled(dev, &clks);
>> +	if (ret <= 0)
> 
> Thank you Michal for the change.
> 
> Have you validated the changes ?
> It looks while success ret would be 0 and it would give return error.

But devm_clk_bulk_get_all_enabled() returns the number of clocks found 
and enabled. And since we need at least one, I think this is correct, 
and the error message below reflects that.

To me that change looks good:

Reviewed-by: Andre Przywara <andre.przywara@arm.com>

Cheers,
Andre


> 
> Thanks, Sanjay
> 
> 
>> +		return dev_err_probe(
>> +			dev, ret,
>> +			"failed to enable clocks or no clocks defined\n");
>>
>> 	rst = devm_reset_control_get_exclusive(dev, NULL);
>> 	if (IS_ERR(rst))
>> @@ -243,6 +245,7 @@ static int sun20i_gpadc_probe(struct platform_device *pdev)
>>
>> static const struct of_device_id sun20i_gpadc_of_id[] = {
>> 	{ .compatible = "allwinner,sun20i-d1-gpadc" },
>> +	{ .compatible = "allwinner,sun55i-a523-gpadc" },
>> 	{ }
>> };
>> MODULE_DEVICE_TABLE(of, sun20i_gpadc_of_id);
>>
>