On 15.08.2018 18:02, Jon Hunter wrote:
> On 14/08/18 15:01, Marcel Ziswiler wrote:
>> From: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx>
>>
>> Actually report the error codes from of_get_named_gpio() resp.
>> devm_gpio_request_one() upon trying to get the codec reset resp. sync
>> GPIOs unless it is just a probe deferral.
>>
>> Signed-off-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx>
>>
>> ---
>>
>> Changes in v2:
>> - Silence probe deferral as suggested by Stefan.
>> - Fix line over 80 characters as reported by checkpatch.
>>
>> sound/soc/tegra/tegra20_ac97.c | 19 ++++++++++++++++---
>> 1 file changed, 16 insertions(+), 3 deletions(-)
>>
>> diff --git a/sound/soc/tegra/tegra20_ac97.c b/sound/soc/tegra/tegra20_ac97.c
>> index 682ef33afb5f..2ac6b2d73980 100644
>> --- a/sound/soc/tegra/tegra20_ac97.c
>> +++ b/sound/soc/tegra/tegra20_ac97.c
>> @@ -351,18 +351,31 @@ static int tegra20_ac97_platform_probe(struct platform_device *pdev)
>> ret = devm_gpio_request_one(&pdev->dev, ac97->reset_gpio,
>> GPIOF_OUT_INIT_HIGH, "codec-reset");
>> if (ret) {
>> - dev_err(&pdev->dev, "could not get codec-reset GPIO\n");
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(&pdev->dev,
>> + "could not get codec-reset GPIO: %d\n",
>> + ret);
>> +
>> goto err_clk_put;
>> }
>> } else {
>> - dev_err(&pdev->dev, "no codec-reset GPIO supplied\n");
>> + ret = ac97->reset_gpio;
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(&pdev->dev,
>> + "no codec-reset GPIO supplied: %d\n",
>> + ret);
>> +
>> goto err_clk_put;
>> }
>>
>> ac97->sync_gpio = of_get_named_gpio(pdev->dev.of_node,
>> "nvidia,codec-sync-gpio", 0);
>> if (!gpio_is_valid(ac97->sync_gpio)) {
>> - dev_err(&pdev->dev, "no codec-sync GPIO supplied\n");
>> + ret = ac97->sync_gpio;
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(&pdev->dev, "no codec-sync GPIO supplied: %d\n",
>> + ret);
>> +
>> goto err_clk_put;
>> }
>
> Thanks, looks good to me. However, I wonder why we don't request the
> 'sync_gpio' in the probe like we do for the reset? Otherwise ...
The comment in tegra20_ac97_codec_warm_reset() is probably the reason:
/*
* although sync line is driven by the DAC pad group warm reset using
* the controller cmd is not working, have to toggle sync line
* manually.
*/
I guess the GPIO need to be freed so that the DAC pad group can use the
sync line?
>
> Acked-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Also looks good to me:
Reviewed-by: Stefan Agner <stefan@xxxxxxxx>
--
Stefan
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