Re: [PATCH] ASoC: cs42l42: Add control for audio slow-start switch

On Fri, Oct 29, 2021 at 05:13:05PM +0100, Richard Fitzgerald wrote:

+static int cs42l42_slow_start_put(struct snd_kcontrol *kcontrol,

• 		  struct snd_ctl_elem_value *ucontrol)
  

+{

• struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
• u8 val;
• /* all bits of SLOW_START_EN much change together */
• switch (ucontrol->value.integer.value[0]) {
• case 0:

• val = 0;
  

• break;
  

• case 1:

• val = CS42L42_SLOW_START_EN_MASK;
  

• break;
  

• default:

• return -EINVAL;
  

• }
• snd_soc_component_update_bits(component, CS42L42_SLOW_START_ENABLE,

• 		      CS42L42_SLOW_START_EN_MASK, val);
  

• return 0;

This should return 1 if the value changed.