[alsa-devel] [PATCH] ASoC: cs4271: claim reset GPIO in bus probe function

[Daniel Mack]

On 02/19/2014 05:08 PM, Austin, Brian wrote:
>> On Feb 19, 2014, at 7:06, "Daniel Mack" <zonque at gmail.com> wrote:

>> -    if (gpio_nreset >= 0)
>> -        if (devm_gpio_request(codec->dev, gpio_nreset, "CS4271 Reset"))
>> -            gpio_nreset = -EINVAL;
>> -    if (gpio_nreset >= 0) {
>> +    if (gpio_is_valid(cs4271->gpio_nreset)) {
>>        /* Reset codec */
>> -        gpio_direction_output(gpio_nreset, 0);
>> +        gpio_direction_output(cs4271->gpio_nreset, 0);
>>        udelay(1);
>> -        gpio_set_value(gpio_nreset, 1);
>> +        gpio_set_value(cs4271->gpio_nreset, 1);
>>        /* Give the codec time to wake up */
>>        udelay(1);
>>    }
>
> Since your moving all the GPIO reset code into a new function that's
> called from the bus probes why not put the reset in there as well?

Because I want the codec to stay in reset until it is actually used, and
the machine drivers builds the DAI link.


Daniel