linux-4.4.1/snd_soc_component_update_bits() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-4.4.1/snd_soc_component_update_bits() へ行く。
• linux-4.4.1/snd_soc_component_update_bits() の差分を削除

*参照元 [#w16ed1f4]
#backlinks

*説明 [#h51b232b]
-パス: [[linux-4.4.1/sound/soc/soc-io.c]]

-FIXME: これは何？
--説明


**引数 [#p68bbbe3]
-struct snd_soc_component *component
--
--[[linux-4.4.1/snd_soc_component]]
-unsigned int reg
--
-unsigned int mask
--
-unsigned int val
--


**返り値 [#o019f69e]
-int
--


**参考 [#xc69fcd8]


*実装 [#j8da2175]
 /**
  * snd_soc_component_update_bits() - Perform read/modify/write cycle
  * @component: Component to update
  * @reg: Register to update
  * @mask: Mask that specifies which bits to update
  * @val: New value for the bits specified by mask
  *
  * Return: 1 if the operation was successful and the value of the register
  * changed, 0 if the operation was successful, but the value did not change.
  * Returns a negative error code otherwise.
  */
 int snd_soc_component_update_bits(struct snd_soc_component *component,
         unsigned int reg, unsigned int mask, unsigned int val)
 {
         bool change;
         int ret;
 
         if (component->regmap)
                 ret = regmap_update_bits_check(component->regmap, reg, mask,
                         val, &change);
         else
                 ret = snd_soc_component_update_bits_legacy(component, reg,
                         mask, val, &change);
 
-
--[[linux-4.4.1/regmap_update_bits_check()]]
--[[linux-4.4.1/snd_soc_component_update_bits_legacy()]]

         if (ret < 0)
                 return ret;
         return change;
 }
 EXPORT_SYMBOL_GPL(snd_soc_component_update_bits);
-
--[[linux-4.4.1/EXPORT_SYMBOL_GPL()]]


*コメント [#vc391426]