[alsa-devel] [PATCH 2/2 v2] ALSA: ASoC: Add reset-gpio DT property to cs4270 driver

[Daniel Mack]

On 25.07.2012 15:18, Mark Brown wrote:
> On Wed, Jul 25, 2012 at 09:03:29AM +0200, Daniel Mack wrote:
>> In the process of moving over from static board files to the device
>> tree, reset pins of peripheral reset pins should be handled by their
>> corresponding drivers.
>>
>> Add a reset-gpio DT property to the cs4270 driver, and de-assert it
>> before probing the chip. The logic could be augmented some day to
>> re-assert it when codec is put to suspend.
> 
> I'm missing 1/2...  Please also don't bury patches in the middle of
> previous threads.
> 
>> +		enum of_gpio_flags flags;
>> +		int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
>> +
>> +		if (gpio_is_valid(gpio))
>> +			devm_gpio_request_one(&i2c_client->dev, gpio,
>> +				     flags & OF_GPIO_ACTIVE_LOW ?
>> +					GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
>> +				     "cs4270 reset");
> 
> This ignores the return code and won't work well with probe deferral, if
> we manage to get a GPIO from the DT then we should fail if we're unable
> request it.  Passing back the return code should get you deferral
> support for free in 3.6 and onwards.
> 

Ok, will resent both patches.