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Commit a8fc415c authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Mark Brown
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ASoC: twl4030: Separate write condition checking from I/O function 



Simplifies the code a bit and prepares it to the removal of local caching.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 258549c0

sound/soc/codecs/twl4030.c

+23 −17
Original line number Diff line number Diff line
@@ -181,50 +181,56 @@ static inline void twl4030_write_reg_cache(struct snd_soc_codec *codec, 
	cache[reg] = value;

}



/*

 * write to the twl4030 register space

 */

static int twl4030_write(struct snd_soc_codec *codec,

			unsigned int reg, unsigned int value)

static bool twl4030_can_write_to_chip(struct snd_soc_codec *codec,

				      unsigned int reg)

{

	struct twl4030_priv *twl4030 = snd_soc_codec_get_drvdata(codec);

	int write_to_reg = 0;

	bool write_to_reg = false;



	twl4030_write_reg_cache(codec, reg, value);

	/* Decide if the given register can be written */

	switch (reg) {

	case TWL4030_REG_EAR_CTL:

		if (twl4030->earpiece_enabled)

			write_to_reg = 1;

			write_to_reg = true;

		break;

	case TWL4030_REG_PREDL_CTL:

		if (twl4030->predrivel_enabled)

			write_to_reg = 1;

			write_to_reg = true;

		break;

	case TWL4030_REG_PREDR_CTL:

		if (twl4030->predriver_enabled)

			write_to_reg = 1;

			write_to_reg = true;

		break;

	case TWL4030_REG_PRECKL_CTL:

		if (twl4030->carkitl_enabled)

			write_to_reg = 1;

			write_to_reg = true;

		break;

	case TWL4030_REG_PRECKR_CTL:

		if (twl4030->carkitr_enabled)

			write_to_reg = 1;

			write_to_reg = true;

		break;

	case TWL4030_REG_HS_GAIN_SET:

		if (twl4030->hsl_enabled || twl4030->hsr_enabled)

			write_to_reg = 1;

			write_to_reg = true;

		break;

	default:

		/* All other register can be written */

		write_to_reg = 1;

		write_to_reg = true;

		break;

	}

	if (write_to_reg)

		return twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,

					    value, reg);



	return write_to_reg;

}



/*

 * write to the twl4030 register space

 */

static int twl4030_write(struct snd_soc_codec *codec,

			 unsigned int reg, unsigned int value)

{

	twl4030_write_reg_cache(codec, reg, value);

	if (twl4030_can_write_to_chip(codec, reg))

		return twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);



	return 0;

}