Subject: [PATCH 1/2] ARM: S5PV210: Add audio support to Aquila

From: [email-masked] (Chanwoo Choi)
Date: Thu, 30 Sep 2010 10:23:06 +0900

Kukjin Kim wrote:
> Chanwoo Choi wrote:
>> Mark Brown wrote:
>>> On Wed, Jul 28, 2010 at 12:04:44PM +0900, Chanwoo Choi wrote:
>>>
>>>> +static struct regulator_consumer_supply wm8994_fixed_voltage0_supplies[] =
>> {
>>>> +	{
>>>> +		.dev_name	= "5-001a",
>>>> +		.supply		= "DBVDD",
>>>> +	}, {
>>>> +		.dev_name	= "5-001a",
>>>> +		.supply		= "AVDD2",
>>>> +	}, {
>>>> +		.dev_name	= "5-001a",
>>>> +		.supply		= "CPVDD",
>>>> +	},
>>>> +
>>>> +};
>>>> +
>>>> +static struct regulator_consumer_supply wm8994_fixed_voltage1_supplies[] =
>> {
>>> All these fixed voltage regulators seem a bit suspicous for a mobile
>>> phone - I'd have expected that the supplies would all be being provided
>>> by your PMIC except for things taken directly from the battery supply
>>> (like the speakers tend to be, for example)?  There's no problem with
>>> the code itself, it just looks a bit odd.
>>>
>> All these consumer supply of WM8994 codec connected the below
>> regulator(VCC_1.8V) on
>> a circuit diagram. "VCC_1.8V" regualtor is always enabled, because it is used to
>> many devices.
>> Then I haven't connected all these consumer supply of WM8994 codec to
>> "VCC_1.8V" regulator.
>> I will modify that the consumer supply would be provided by PMIC.
>>
>> static struct regulator_init_data aquila_buck3_data = {
>> 	.constraints	= {
>> 		.name		= "VCC_1.8V",
>> 		.min_uV		= 1800000,
>> 		.max_uV		= 1800000,
>> 		.apply_uV	= 1,
>> 		.state_mem	= {
>> 			.enabled = 1,
>> 		},
>> 	},
>> };
>>
>>>> +static struct i2c_board_info i2c_gpio5_devs[] __initdata = {
>>>> +	{
>>>> +		/* CS/ADDR = low 0x34 (FYI: high = 0x36) */
>>>> +		I2C_BOARD_INFO("wm8994", 0x34 >> 1),
>>>> +		.platform_data	= &wm8994_platform_data,
>>>> +	},
>>>> +};
>>> Probably clearer for generic Linux use to specify the address as 0x1a
>>> directly.
>> Ok, I will do.
>>
>>>> +static void __init aquila_sound_init(void)
>>>> +{
>>>> +	unsigned int gpio;
>>>> +
>>>> +	/* CODEC_XTAL_EN */
>>>> +	gpio = S5PV210_GPH3(2);		/* XEINT_26 */
>>>> +	gpio_request(gpio, "CODEC_XTAL_EN");
>>>> +	s3c_gpio_cfgpin(gpio, S3C_GPIO_OUTPUT);
>>>> +	s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
>>>> +	gpio_direction_output(gpio, 1);
>>> Might be as well to provide some or all this stuff in your audio machine
>>> driver?
>> The Aquila board have a oscillator which provide main clock to
>> WM8994 audio codec. The oscillator provide 24MHz clock to WM8994 audio codec
>> (MCLK1 pin). I set gpio setting of "CODEC_XTAL_EN" to enable a oscillator.
>>
>>>> +	/* MICBIAS_EN */
>>>> +	gpio = S5PV210_GPJ4(2);			/* XMSMRN */
>>>> +	gpio_request(gpio, "MICBIAS_EN");
>>>> +	s3c_gpio_cfgpin(gpio, S3C_GPIO_OUTPUT);
>>>> +	gpio_direction_output(gpio, 1);
>>> This in particular would benefit from keeping the request of the GPIO
>>> joined up with the driver that uses it.
>> Ok, I will move this code to machine driver(sound/soc/s3c24xxx/aquila_wm8994.c).
>>
>>>> +	/* ADC_EN */
>>>> +	gpio = S5PV210_GPJ3(2);
>>>> +	gpio_request(gpio, "ADC_EN");
>>>> +	s3c_gpio_cfgpin(gpio, S3C_GPIO_OUTPUT);
>>>> +	gpio_direction_output(gpio, 1);
>>> I'm not sure what this does?
>>>
>> I explained below description about "ADC_EN" :
>> "ADC_EN : This gpio enable the ADC device which is used to detect
>>  the kind of jack. (SND_JACK_HEADPHONE/HEADSET/MECHANICAL/AVOUT)
>>  According to the kind of jack, an electric current is changed.
>>  (Only used on Aquila board) "
>>
>> When inserting the jack to Aquila board, I used ADC driver so that, detecting
>> the kind of jack(SND_JACK_HEADPHONE/HEADSET/MECHANICAL/AVOUT).
>>
>> I will separately make the another function to initialize ADC driver.
>>
>> Thank you for your comment.
>> Chanwoo Choi
>>
> Hi,
> 
> How was going on?
> 

I did post this patch and reviewed by maintainer.
The request was reflected to following patch.
Also, I did explain the constraints of the regulator of WM8994 codec
and resend following patch. This patch include Goni and Aquila board code
related to audio.
	[PATCH] ARM: S5PV210: Add audio support to Goni and Aquila board

This is my mistake, "RESEND" word is leaved out in the subject.

Thanks,
Chanwoo Choi

> Thanks.
> 
> Best regards,
> Kgene.
> --
> Kukjin Kim <[email-masked]>, Senior Engineer,
> SW Solution Development Team, Samsung Electronics Co., Ltd.
> 
> 
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