[alsa-devel] [PATCH v2] snd-cs8427: separate HW initialization

[Takashi Iwai]

At Thu, 3 Apr 2014 14:49:46 +0200,
Ondrej Zary wrote:
> 
> Separate HW initialization from device creation.
> This is needed for suspend/resume support.
> 
> Signed-off-by: Ondrej Zary <linux at rainbow-software.org>

Thanks, applied.


Takashi

> ---
>  include/sound/cs8427.h |    1 +
>  sound/i2c/cs8427.c     |   57 ++++++++++++++++++++++++++++++++----------------
>  2 files changed, 39 insertions(+), 19 deletions(-)
> 
> diff --git a/include/sound/cs8427.h b/include/sound/cs8427.h
> index f862cff..0b6a187 100644
> --- a/include/sound/cs8427.h
> +++ b/include/sound/cs8427.h
> @@ -188,6 +188,7 @@
>  
>  struct snd_pcm_substream;
>  
> +int snd_cs8427_init(struct snd_i2c_bus *bus, struct snd_i2c_device *device);
>  int snd_cs8427_create(struct snd_i2c_bus *bus, unsigned char addr,
>  		      unsigned int reset_timeout, struct snd_i2c_device **r_cs8427);
>  int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
> diff --git a/sound/i2c/cs8427.c b/sound/i2c/cs8427.c
> index 6c2dc38..7e21621 100644
> --- a/sound/i2c/cs8427.c
> +++ b/sound/i2c/cs8427.c
> @@ -150,10 +150,8 @@ static void snd_cs8427_free(struct snd_i2c_device *device)
>  	kfree(device->private_data);
>  }
>  
> -int snd_cs8427_create(struct snd_i2c_bus *bus,
> -		      unsigned char addr,
> -		      unsigned int reset_timeout,
> -		      struct snd_i2c_device **r_cs8427)
> +int snd_cs8427_init(struct snd_i2c_bus *bus,
> +		    struct snd_i2c_device *device)
>  {
>  	static unsigned char initvals1[] = {
>  	  CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
> @@ -200,22 +198,10 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
>  	     Inhibit E->F transfers. */
>  	  CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
>  	};
> +	struct cs8427 *chip = device->private_data;
>  	int err;
> -	struct cs8427 *chip;
> -	struct snd_i2c_device *device;
>  	unsigned char buf[24];
>  
> -	if ((err = snd_i2c_device_create(bus, "CS8427",
> -					 CS8427_ADDR | (addr & 7),
> -					 &device)) < 0)
> -		return err;
> -	chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
> -	if (chip == NULL) {
> -	      	snd_i2c_device_free(device);
> -		return -ENOMEM;
> -	}
> -	device->private_free = snd_cs8427_free;
> -	
>  	snd_i2c_lock(bus);
>  	err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
>  	if (err != CS8427_VER8427A) {
> @@ -264,10 +250,44 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
>  	snd_i2c_unlock(bus);
>  
>  	/* turn on run bit and rock'n'roll */
> +	snd_cs8427_reset(device);
> +
> +	return 0;
> +
> +__fail:
> +	snd_i2c_unlock(bus);
> +
> +	return err;
> +}
> +EXPORT_SYMBOL(snd_cs8427_init);
> +
> +int snd_cs8427_create(struct snd_i2c_bus *bus,
> +		      unsigned char addr,
> +		      unsigned int reset_timeout,
> +		      struct snd_i2c_device **r_cs8427)
> +{
> +	int err;
> +	struct cs8427 *chip;
> +	struct snd_i2c_device *device;
> +
> +	err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7),
> +				    &device);
> +	if (err < 0)
> +		return err;
> +	chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
> +	if (chip == NULL) {
> +		snd_i2c_device_free(device);
> +		return -ENOMEM;
> +	}
> +	device->private_free = snd_cs8427_free;
> +
>  	if (reset_timeout < 1)
>  		reset_timeout = 1;
>  	chip->reset_timeout = reset_timeout;
> -	snd_cs8427_reset(device);
> +
> +	err = snd_cs8427_init(bus, device);
> +	if (err)
> +		goto __fail;
>  
>  #if 0	// it's nice for read tests
>  	{
> @@ -286,7 +306,6 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
>  	return 0;
>  
>        __fail:
> -      	snd_i2c_unlock(bus);
>        	snd_i2c_device_free(device);
>        	return err < 0 ? err : -EIO;
>  }
> -- 
> Ondrej Zary
>