ASoC: soc-component: merge snd_soc_component_read() and snd_soc_component_read32()

We had read/write function for Codec, Platform, etc,
but these has been merged into snd_soc_component_read/write().

Internally, it is using regmap or driver function.
In read case, each styles are like below

regmap
	ret = regmap_read(..., reg, &val);

driver function
	val = xxx->read(..., reg);

Because of this kind of different style, to keep same read style,
when we merged each read function into snd_soc_component_read(),
we created snd_soc_component_read32(), like below.
commit 738b49ef ("ASoC: add snd_soc_component_read32")

(1)	val = snd_soc_component_read32(component, reg);

(2)	ret = snd_soc_component_read(component, reg, &val);

Many drivers are using snd_soc_component_read32(), and
some drivers are using snd_soc_component_read() today.

In generally, we don't check read function successes,
because, we will have many other issues at initial timing
if read function didn't work.

Now we can use soc_component_err() when error case.
This means, it is easy to notice if error occurred.

This patch aggressively merge snd_soc_component_read() and _read32(),
and makes snd_soc_component_read/write() as generally style.

This patch do
	1) merge snd_soc_component_read() and snd_soc_component_read32()
	2) it uses soc_component_err() when error case (easy to notice)
	3) keeps read32 for now by #define
	4) update snd_soc_component_read() for all drivers

Because _read() user drivers are not too many, this patch changes
all user drivers.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/87sgev4mfl.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-component.h

@@ -333,9 +333,8 @@ void snd_soc_component_set_aux(struct snd_soc_component *component,
 int snd_soc_component_init(struct snd_soc_component *component);
 
 /* component IO */
-int snd_soc_component_read(struct snd_soc_component *component,
-			   unsigned int reg, unsigned int *val);
-unsigned int snd_soc_component_read32(struct snd_soc_component *component,
+#define snd_soc_component_read32 snd_soc_component_read
+unsigned int snd_soc_component_read(struct snd_soc_component *component,
 				      unsigned int reg);
 int snd_soc_component_write(struct snd_soc_component *component,
 			    unsigned int reg, unsigned int val);

sound/soc/codecs/ak4613.c

@@ -490,8 +490,8 @@ static void ak4613_dummy_write(struct work_struct *work)
 	 */
 	udelay(5000000 / priv->rate);
 
-	snd_soc_component_read(component, PW_MGMT1, &mgmt1);
-	snd_soc_component_read(component, PW_MGMT3, &mgmt3);
+	mgmt1 = snd_soc_component_read(component, PW_MGMT1);
+	mgmt3 = snd_soc_component_read(component, PW_MGMT3);
 
 	snd_soc_component_write(component, PW_MGMT1, mgmt1);
 	snd_soc_component_write(component, PW_MGMT3, mgmt3);

sound/soc/codecs/cs47l35.c

@@ -129,19 +129,11 @@ static void cs47l35_hp_post_enable(struct snd_soc_dapm_widget *w)
 	struct snd_soc_component *component =
 		snd_soc_dapm_to_component(w->dapm);
 	unsigned int val;
-	int ret;
 
 	switch (w->shift) {
 	case MADERA_OUT1L_ENA_SHIFT:
 	case MADERA_OUT1R_ENA_SHIFT:
-		ret = snd_soc_component_read(component, MADERA_OUTPUT_ENABLES_1,
-					     &val);
-		if (ret) {
-			dev_err(component->dev,
-				"Failed to check output enables: %d\n", ret);
-			return;
-		}
-
+		val = snd_soc_component_read(component, MADERA_OUTPUT_ENABLES_1);
 		val &= (MADERA_OUT1L_ENA | MADERA_OUT1R_ENA);
 
 		if (val != (MADERA_OUT1L_ENA | MADERA_OUT1R_ENA))

sound/soc/codecs/cs47l85.c

@@ -191,19 +191,11 @@ static void cs47l85_hp_post_enable(struct snd_soc_dapm_widget *w)
 	struct snd_soc_component *component =
 		snd_soc_dapm_to_component(w->dapm);
 	unsigned int val;
-	int ret;
 
 	switch (w->shift) {
 	case MADERA_OUT1L_ENA_SHIFT:
 	case MADERA_OUT1R_ENA_SHIFT:
-		ret = snd_soc_component_read(component, MADERA_OUTPUT_ENABLES_1,
-					     &val);
-		if (ret) {
-			dev_err(component->dev,
-				"Failed to check output enables: %d\n", ret);
-			return;
-		}
-
+		val = snd_soc_component_read(component, MADERA_OUTPUT_ENABLES_1);
 		val &= (MADERA_OUT1L_ENA | MADERA_OUT1R_ENA);
 
 		if (val != (MADERA_OUT1L_ENA | MADERA_OUT1R_ENA))

sound/soc/codecs/inno_rk3036.c

@@ -48,11 +48,9 @@ static int rk3036_codec_antipop_get(struct snd_kcontrol *kcontrol,
 				    struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
-	int val, ret, regval;
+	int val, regval;
 
-	ret = snd_soc_component_read(component, INNO_R09, &regval);
-	if (ret)
-		return ret;
+	regval = snd_soc_component_read(component, INNO_R09);
 	val = ((regval >> INNO_R09_HPL_ANITPOP_SHIFT) &
 	       INNO_R09_HP_ANTIPOP_MSK) == INNO_R09_HP_ANTIPOP_ON;
 	ucontrol->value.integer.value[0] = val;

sound/soc/codecs/madera.c

@@ -628,12 +628,8 @@ int madera_out1_demux_get(struct snd_kcontrol *kcontrol,
 	struct snd_soc_component *component =
 		snd_soc_dapm_kcontrol_component(kcontrol);
 	unsigned int val;
-	int ret;
-
-	ret = snd_soc_component_read(component, MADERA_OUTPUT_ENABLES_1, &val);
-	if (ret)
-		return ret;
 
+	val = snd_soc_component_read(component, MADERA_OUTPUT_ENABLES_1);
 	val &= MADERA_EP_SEL_MASK;
 	val >>= MADERA_EP_SEL_SHIFT;
 	ucontrol->value.enumerated.item[0] = val;
@@ -1068,12 +1064,7 @@ int madera_rate_put(struct snd_kcontrol *kcontrol,
 	 */
 	mutex_lock(&priv->rate_lock);
 
-	ret = snd_soc_component_read(component, e->reg, &val);
-	if (ret < 0) {
-		dev_warn(priv->madera->dev, "Failed to read 0x%x (%d)\n",
-			 e->reg, ret);
-		goto out;
-	}
+	val = snd_soc_component_read(component, e->reg);
 	val >>= e->shift_l;
 	val &= e->mask;
 	if (snd_soc_enum_item_to_val(e, item) == val) {
@@ -2178,10 +2169,7 @@ int madera_dfc_put(struct snd_kcontrol *kcontrol,
 
 	snd_soc_dapm_mutex_lock(dapm);
 
-	ret = snd_soc_component_read(component, reg, &val);
-	if (ret)
-		goto exit;
-
+	val = snd_soc_component_read(component, reg);
 	if (val & MADERA_DFC1_ENA) {
 		ret = -EBUSY;
 		dev_err(component->dev, "Can't change mode on an active DFC\n");
@@ -2211,9 +2199,7 @@ int madera_lp_mode_put(struct snd_kcontrol *kcontrol,
 	snd_soc_dapm_mutex_lock(dapm);
 
 	/* Cannot change lp mode on an active input */
-	ret = snd_soc_component_read(component, MADERA_INPUT_ENABLES, &val);
-	if (ret)
-		goto exit;
+	val = snd_soc_component_read(component, MADERA_INPUT_ENABLES);
 	mask = (mc->reg - MADERA_ADC_DIGITAL_VOLUME_1L) / 4;
 	mask ^= 0x1; /* Flip bottom bit for channel order */
 
@@ -2276,7 +2262,6 @@ int madera_in_ev(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
 	struct madera_priv *priv = snd_soc_component_get_drvdata(component);
 	unsigned int reg, val;
-	int ret;
 
 	if (w->shift % 2)
 		reg = MADERA_ADC_DIGITAL_VOLUME_1L + ((w->shift / 2) * 8);
@@ -2305,9 +2290,8 @@ int madera_in_ev(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
 		break;
 	case SND_SOC_DAPM_POST_PMD:
 		/* Disable volume updates if no inputs are enabled */
-		ret = snd_soc_component_read(component, MADERA_INPUT_ENABLES,
-					     &val);
-		if (!ret && !val)
+		val = snd_soc_component_read(component, MADERA_INPUT_ENABLES);
+		if (!val)
 			madera_in_set_vu(priv, false);
 		break;
 	default:
@@ -3087,26 +3071,16 @@ static int madera_aif_cfg_changed(struct snd_soc_component *component,
 				  int base, int bclk, int lrclk, int frame)
 {
 	unsigned int val;
-	int ret;
 
-	ret = snd_soc_component_read(component, base + MADERA_AIF_BCLK_CTRL,
-				     &val);
-	if (ret)
-		return ret;
+	val = snd_soc_component_read(component, base + MADERA_AIF_BCLK_CTRL);
 	if (bclk != (val & MADERA_AIF1_BCLK_FREQ_MASK))
 		return 1;
 
-	ret = snd_soc_component_read(component, base + MADERA_AIF_RX_BCLK_RATE,
-				     &val);
-	if (ret)
-		return ret;
+	val = snd_soc_component_read(component, base + MADERA_AIF_RX_BCLK_RATE);
 	if (lrclk != (val & MADERA_AIF1RX_BCPF_MASK))
 		return 1;
 
-	ret = snd_soc_component_read(component, base + MADERA_AIF_FRAME_CTRL_1,
-				     &val);
-	if (ret)
-		return ret;
+	val = snd_soc_component_read(component, base + MADERA_AIF_FRAME_CTRL_1);
 	if (frame != (val & (MADERA_AIF1TX_WL_MASK |
 			     MADERA_AIF1TX_SLOT_LEN_MASK)))
 		return 1;
@@ -3162,10 +3136,7 @@ static int madera_hw_params(struct snd_pcm_substream *substream,
 	}
 
 	/* Force multiple of 2 channels for I2S mode */
-	ret = snd_soc_component_read(component, base + MADERA_AIF_FORMAT, &val);
-	if (ret)
-		return ret;
-
+	val = snd_soc_component_read(component, base + MADERA_AIF_FORMAT);
 	val &= MADERA_AIF1_FMT_MASK;
 	if ((channels & 1) && val == MADERA_FMT_I2S_MODE) {
 		madera_aif_dbg(dai, "Forcing stereo mode\n");

sound/soc/codecs/nau8822.c

@@ -831,7 +831,7 @@ static int nau8822_hw_params(struct snd_pcm_substream *substream,
 	unsigned int ctrl_val, bclk_fs, bclk_div;
 
 	/* make BCLK and LRC divide configuration if the codec as master. */
-	snd_soc_component_read(component, NAU8822_REG_CLOCKING, &ctrl_val);
+	ctrl_val = snd_soc_component_read(component, NAU8822_REG_CLOCKING);
 	if (ctrl_val & NAU8822_CLK_MASTER) {
 		/* get the bclk and fs ratio */
 		bclk_fs = snd_soc_params_to_bclk(params) / params_rate(params);

sound/soc/codecs/rt1305.c

@@ -411,7 +411,7 @@ static int rt1305_is_rc_clk_from_pll(struct snd_soc_dapm_widget *source,
 	struct rt1305_priv *rt1305 = snd_soc_component_get_drvdata(component);
 	unsigned int val;
 
-	snd_soc_component_read(component, RT1305_CLK_1, &val);
+	val = snd_soc_component_read(component, RT1305_CLK_1);
 
 	if (rt1305->sysclk_src == RT1305_FS_SYS_PRE_S_PLL1 &&
 		(val & RT1305_SEL_PLL_SRC_2_RCCLK))

sound/soc/codecs/rt5682.c

@@ -2640,8 +2640,7 @@ static unsigned long rt5682_bclk_recalc_rate(struct clk_hw *hw,
 	struct snd_soc_component *component = rt5682->component;
 	unsigned int bclks_per_wclk;
 
-	snd_soc_component_read(component, RT5682_TDM_TCON_CTRL,
-		&bclks_per_wclk);
+	bclks_per_wclk = snd_soc_component_read(component, RT5682_TDM_TCON_CTRL);
 
 	switch (bclks_per_wclk & RT5682_TDM_BCLK_MS1_MASK) {
 	case RT5682_TDM_BCLK_MS1_256:

sound/soc/codecs/tas5720.c

@@ -508,10 +508,10 @@ static int tas5722_volume_get(struct snd_kcontrol *kcontrol,
 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
 	unsigned int val;
 
-	snd_soc_component_read(component, TAS5720_VOLUME_CTRL_REG, &val);
+	val = snd_soc_component_read(component, TAS5720_VOLUME_CTRL_REG);
 	ucontrol->value.integer.value[0] = val << 1;
 
-	snd_soc_component_read(component, TAS5722_DIGITAL_CTRL2_REG, &val);
+	val = snd_soc_component_read(component, TAS5722_DIGITAL_CTRL2_REG);
 	ucontrol->value.integer.value[0] |= val & TAS5722_VOL_CONTROL_LSB;
 
 	return 0;

sound/soc/codecs/tda7419.c

@@ -187,18 +187,13 @@ static int tda7419_vol_get(struct snd_kcontrol *kcontrol,
 	int thresh = tvc->thresh;
 	unsigned int invert = tvc->invert;
 	int val;
-	int ret;
 
-	ret = snd_soc_component_read(component, reg, &val);
-	if (ret < 0)
-		return ret;
+	val = snd_soc_component_read(component, reg);
 	ucontrol->value.integer.value[0] =
 		tda7419_vol_get_value(val, mask, min, thresh, invert);
 
 	if (tda7419_vol_is_stereo(tvc)) {
-		ret = snd_soc_component_read(component, rreg, &val);
-		if (ret < 0)
-			return ret;
+		val = snd_soc_component_read(component, rreg);
 		ucontrol->value.integer.value[1] =
 			tda7419_vol_get_value(val, mask, min, thresh, invert);
 	}

sound/soc/codecs/tscs454.c

@@ -353,12 +353,7 @@ static int write_coeff_ram(struct snd_soc_component *component, u8 *coeff_ram,
 	for (cnt = 0; cnt < coeff_cnt; cnt++, coeff_addr++) {
 
 		for (trys = 0; trys < DACCRSTAT_MAX_TRYS; trys++) {
-			ret = snd_soc_component_read(component, r_stat, &val);
-			if (ret < 0) {
-				dev_err(component->dev,
-					"Failed to read stat (%d)\n", ret);
-				return ret;
-			}
+			val = snd_soc_component_read(component, r_stat);
 			if (!val)
 				break;
 		}
@@ -444,12 +439,7 @@ static int coeff_ram_put(struct snd_kcontrol *kcontrol,
 	mutex_lock(&tscs454->pll1.lock);
 	mutex_lock(&tscs454->pll2.lock);
 
-	ret = snd_soc_component_read(component, R_PLLSTAT, &val);
-	if (ret < 0) {
-		dev_err(component->dev, "Failed to read PLL status (%d)\n",
-				ret);
-		goto exit;
-	}
+	val = snd_soc_component_read(component, R_PLLSTAT);
 	if (val) { /* PLLs locked */
 		ret = write_coeff_ram(component, coeff_ram,
 			r_stat, r_addr, r_wr,
@@ -2642,13 +2632,10 @@ static int tscs454_set_sysclk(struct snd_soc_dai *dai,
 	struct tscs454 *tscs454 = snd_soc_component_get_drvdata(component);
 	unsigned int val;
 	int bclk_dai;
-	int ret;
 
 	dev_dbg(component->dev, "%s(): freq = %u\n", __func__, freq);
 
-	ret = snd_soc_component_read(component, R_PLLCTL, &val);
-	if (ret < 0)
-		return ret;
+	val = snd_soc_component_read(component, R_PLLCTL);
 
 	bclk_dai = (val & FM_PLLCTL_BCLKSEL) >> FB_PLLCTL_BCLKSEL;
 	if (bclk_dai != dai->id)
@@ -3204,10 +3191,7 @@ static int tscs454_hw_params(struct snd_pcm_substream *substream,
 	}
 
 	if (!aifs_active(&tscs454->aifs_status)) { /* First active aif */
-		ret = snd_soc_component_read(component, R_ISRC, &val);
-		if (ret < 0)
-			goto exit;
-
+		val = snd_soc_component_read(component, R_ISRC);
 		if ((val & FM_ISRC_IBR) == FV_IBR_48)
 			tscs454->internal_rate.pll = &tscs454->pll1;
 		else

sound/soc/fsl/fsl_audmix.c

@@ -116,13 +116,9 @@ static int fsl_audmix_put_mix_clk_src(struct snd_kcontrol *kcontrol,
 	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 	unsigned int *item = ucontrol->value.enumerated.item;
 	unsigned int reg_val, val, mix_clk;
-	int ret;
 
 	/* Get current state */
-	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);
-	if (ret)
-		return ret;
-
+	reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR);
 	mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK)
 			>> FSL_AUDMIX_CTR_MIXCLK_SHIFT);
 	val = snd_soc_enum_item_to_val(e, item[0]);
@@ -162,9 +158,7 @@ static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol,
 	int ret;
 
 	/* Get current state */
-	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);
-	if (ret)
-		return ret;
+	reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR);
 
 	/* "From" state */
 	out_src = ((reg_val & FSL_AUDMIX_CTR_OUTSRC_MASK)

sound/soc/fsl/fsl_easrc.c

@@ -79,11 +79,8 @@ static int fsl_easrc_get_reg(struct snd_kcontrol *kcontrol,
 	struct soc_mreg_control *mc =
 		(struct soc_mreg_control *)kcontrol->private_value;
 	unsigned int regval;
-	int ret;
 
-	ret = snd_soc_component_read(component, mc->regbase, &regval);
-	if (ret < 0)
-		return ret;
+	regval = snd_soc_component_read(component, mc->regbase);
 
 	ucontrol->value.integer.value[0] = regval;
 

sound/soc/meson/aiu-encoder-i2s.c

@@ -72,11 +72,10 @@ static int aiu_encoder_i2s_setup_desc(struct snd_soc_component *component,
 {
 	/* Always operate in split (classic interleaved) mode */
 	unsigned int desc = AIU_I2S_SOURCE_DESC_MODE_SPLIT;
-	unsigned int val;
 
 	/* Reset required to update the pipeline */
 	snd_soc_component_write(component, AIU_RST_SOFT, AIU_RST_SOFT_I2S_FAST);
-	snd_soc_component_read(component, AIU_I2S_SYNC, &val);
+	snd_soc_component_read(component, AIU_I2S_SYNC);
 
 	switch (params_physical_width(params)) {
 	case 16: /* Nothing to do */

sound/soc/meson/aiu-fifo-i2s.c

@@ -46,7 +46,6 @@ static int aiu_fifo_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 				struct snd_soc_dai *dai)
 {
 	struct snd_soc_component *component = dai->component;
-	unsigned int val;
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
@@ -54,7 +53,7 @@ static int aiu_fifo_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		snd_soc_component_write(component, AIU_RST_SOFT,
 					AIU_RST_SOFT_I2S_FAST);
-		snd_soc_component_read(component, AIU_I2S_SYNC, &val);
+		snd_soc_component_read(component, AIU_I2S_SYNC);
 		break;
 	}
 

sound/soc/meson/aiu-fifo.c

@@ -37,8 +37,7 @@ snd_pcm_uframes_t aiu_fifo_pointer(struct snd_soc_component *component,
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	unsigned int addr;
 
-	snd_soc_component_read(component, fifo->mem_offset + AIU_MEM_RD,
-			       &addr);
+	addr = snd_soc_component_read(component, fifo->mem_offset + AIU_MEM_RD);
 
 	return bytes_to_frames(runtime, addr - (unsigned int)runtime->dma_addr);
 }

sound/soc/soc-ac97.c

@@ -82,13 +82,12 @@ static int snd_soc_ac97_gpio_get(struct gpio_chip *chip, unsigned offset)
 	struct snd_soc_component *component = gpio_to_component(chip);
 	int ret;
 
-	if (snd_soc_component_read(component, AC97_GPIO_STATUS, &ret) < 0)
-		ret = -1;
+	ret = snd_soc_component_read(component, AC97_GPIO_STATUS);
 
 	dev_dbg(component->dev, "get gpio %d : %d\n", offset,
-		ret < 0 ? ret : ret & (1 << offset));
+		ret & (1 << offset));
 
-	return ret < 0 ? ret : !!(ret & (1 << offset));
+	return !!(ret & (1 << offset));
 }
 
 static void snd_soc_ac97_gpio_set(struct gpio_chip *chip, unsigned offset,

sound/soc/soc-component.c

@@ -407,41 +407,30 @@ EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
  * snd_soc_component_read() - Read register value
  * @component: Component to read from
  * @reg: Register to read
- * @val: Pointer to where the read value is stored
  *
- * Return: 0 on success, a negative error code otherwise.
+ * Return: read value
  */
-int snd_soc_component_read(struct snd_soc_component *component,
-			   unsigned int reg, unsigned int *val)
+unsigned int snd_soc_component_read(struct snd_soc_component *component,
+				    unsigned int reg)
 {
 	int ret;
+	unsigned int val = 0;
 
 	if (component->regmap)
-		ret = regmap_read(component->regmap, reg, val);
+		ret = regmap_read(component->regmap, reg, &val);
 	else if (component->driver->read) {
-		*val = component->driver->read(component, reg);
 		ret = 0;
+		val = component->driver->read(component, reg);
 	}
 	else
 		ret = -EIO;
 
-	return soc_component_ret(component, ret);
-}
-EXPORT_SYMBOL_GPL(snd_soc_component_read);
-
-unsigned int snd_soc_component_read32(struct snd_soc_component *component,
-				      unsigned int reg)
-{
-	unsigned int val;
-	int ret;
-
-	ret = snd_soc_component_read(component, reg, &val);
 	if (ret < 0)
-		return soc_component_ret(component, -1);
+		soc_component_ret(component, ret);
 
 	return val;
 }
-EXPORT_SYMBOL_GPL(snd_soc_component_read32);
+EXPORT_SYMBOL_GPL(snd_soc_component_read);
 
 /**
  * snd_soc_component_write() - Write register value
@@ -470,19 +459,17 @@ static int snd_soc_component_update_bits_legacy(
 	unsigned int mask, unsigned int val, bool *change)
 {
 	unsigned int old, new;
-	int ret;
+	int ret = 0;
 
 	mutex_lock(&component->io_mutex);
 
-	ret = snd_soc_component_read(component, reg, &old);
-	if (ret < 0)
-		goto out_unlock;
+	old = snd_soc_component_read(component, reg);
 
 	new = (old & ~mask) | (val & mask);
 	*change = old != new;
 	if (*change)
 		ret = snd_soc_component_write(component, reg, new);
-out_unlock:
+
 	mutex_unlock(&component->io_mutex);
 
 	return soc_component_ret(component, ret);
@@ -584,11 +571,8 @@ int snd_soc_component_test_bits(struct snd_soc_component *component,
 				unsigned int reg, unsigned int mask, unsigned int value)
 {
 	unsigned int old, new;
-	int ret;
 
-	ret = snd_soc_component_read(component, reg, &old);
-	if (ret < 0)
-		return soc_component_ret(component, ret);
+	old = snd_soc_component_read(component, reg);
 	new = (old & ~mask) | value;
 	return old != new;
 }

sound/soc/soc-dapm.c

@@ -616,12 +616,11 @@ static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
 	return dapm->component->name_prefix;
 }
 
-static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
-	unsigned int *value)
+static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg)
 {
 	if (!dapm->component)
 		return -EIO;
-	return snd_soc_component_read(dapm->component, reg, value);
+	return  snd_soc_component_read(dapm->component, reg);
 }
 
 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
@@ -753,7 +752,7 @@ static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
 	int i;
 
 	if (e->reg != SND_SOC_NOPM) {
-		soc_dapm_read(dapm, e->reg, &val);
+		val = soc_dapm_read(dapm, e->reg);
 		val = (val >> e->shift_l) & e->mask;
 		item = snd_soc_enum_val_to_item(e, val);
 	} else {
@@ -790,7 +789,7 @@ static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
 	unsigned int val;
 
 	if (reg != SND_SOC_NOPM) {
-		soc_dapm_read(p->sink->dapm, reg, &val);
+		val = soc_dapm_read(p->sink->dapm, reg);
 		/*
 		 * The nth_path argument allows this function to know
 		 * which path of a kcontrol it is setting the initial
@@ -805,7 +804,7 @@ static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
 		 */
 		if (snd_soc_volsw_is_stereo(mc) && nth_path > 0) {
 			if (reg != mc->rreg)
-				soc_dapm_read(p->sink->dapm, mc->rreg, &val);
+				val = soc_dapm_read(p->sink->dapm, mc->rreg);
 			val = (val >> mc->rshift) & mask;
 		} else {
 			val = (val >> shift) & mask;
@@ -3246,7 +3245,7 @@ int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
 
 		/* Read the initial power state from the device */
 		if (w->reg >= 0) {
-			soc_dapm_read(w->dapm, w->reg, &val);
+			val = soc_dapm_read(w->dapm, w->reg);
 			val = val >> w->shift;
 			val &= w->mask;
 			if (val == w->on_val)
@@ -3288,15 +3287,14 @@ int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
 	unsigned int mask = (1 << fls(max)) - 1;
 	unsigned int invert = mc->invert;
 	unsigned int reg_val, val, rval = 0;
-	int ret = 0;
 
 	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
 	if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
-		ret = soc_dapm_read(dapm, reg, &reg_val);
+		reg_val = soc_dapm_read(dapm, reg);
 		val = (reg_val >> shift) & mask;
 
-		if (ret == 0 && reg != mc->rreg)
-			ret = soc_dapm_read(dapm, mc->rreg, &reg_val);
+		if (reg != mc->rreg)
+			reg_val = soc_dapm_read(dapm, mc->rreg);
 
 		if (snd_soc_volsw_is_stereo(mc))
 			rval = (reg_val >> mc->rshift) & mask;
@@ -3309,9 +3307,6 @@ int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
 	}
 	mutex_unlock(&card->dapm_mutex);
 
-	if (ret)
-		return ret;
-
 	if (invert)
 		ucontrol->value.integer.value[0] = max - val;
 	else
@@ -3324,7 +3319,7 @@ int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
 			ucontrol->value.integer.value[1] = rval;
 	}
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
 
@@ -3439,11 +3434,7 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
 
 	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
 	if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
-		int ret = soc_dapm_read(dapm, e->reg, &reg_val);
-		if (ret) {
-			mutex_unlock(&card->dapm_mutex);
-			return ret;
-		}
+		reg_val = soc_dapm_read(dapm, e->reg);
 	} else {
 		reg_val = dapm_kcontrol_get_value(kcontrol);
 	}

sound/soc/soc-ops.c

@@ -63,11 +63,8 @@ int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
 	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 	unsigned int val, item;
 	unsigned int reg_val;
-	int ret;
 
-	ret = snd_soc_component_read(component, e->reg, &reg_val);
-	if (ret)
-		return ret;
+	reg_val = snd_soc_component_read(component, e->reg);
 	val = (reg_val >> e->shift_l) & e->mask;
 	item = snd_soc_enum_val_to_item(e, val);
 	ucontrol->value.enumerated.item[0] = item;
@@ -136,10 +133,7 @@ static int snd_soc_read_signed(struct snd_soc_component *component,
 	int ret;
 	unsigned int val;
 
-	ret = snd_soc_component_read(component, reg, &val);
-	if (ret < 0)
-		return ret;
-
+	val = snd_soc_component_read(component, reg);
 	val = (val >> shift) & mask;
 
 	if (!sign_bit) {
@@ -375,19 +369,12 @@ int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
 	int min = mc->min;
 	unsigned int mask = (1U << (fls(min + max) - 1)) - 1;
 	unsigned int val;
-	int ret;
-
-	ret = snd_soc_component_read(component, reg, &val);
-	if (ret < 0)
-		return ret;
 
+	val = snd_soc_component_read(component, reg);
 	ucontrol->value.integer.value[0] = ((val >> shift) - min) & mask;
 
 	if (snd_soc_volsw_is_stereo(mc)) {
-		ret = snd_soc_component_read(component, reg2, &val);
-		if (ret < 0)
-			return ret;
-
+		val = snd_soc_component_read(component, reg2);
 		val = ((val >> rshift) - min) & mask;
 		ucontrol->value.integer.value[1] = val;
 	}
@@ -548,12 +535,8 @@ int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
 	unsigned int mask = (1 << fls(max)) - 1;
 	unsigned int invert = mc->invert;
 	unsigned int val;
-	int ret;
-
-	ret = snd_soc_component_read(component, reg, &val);
-	if (ret)
-		return ret;
 
+	val = snd_soc_component_read(component, reg);
 	ucontrol->value.integer.value[0] = (val >> shift) & mask;
 	if (invert)
 		ucontrol->value.integer.value[0] =
@@ -563,10 +546,7 @@ int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
 			ucontrol->value.integer.value[0] - min;
 
 	if (snd_soc_volsw_is_stereo(mc)) {
-		ret = snd_soc_component_read(component, rreg, &val);
-		if (ret)
-			return ret;
-
+		val = snd_soc_component_read(component, rreg);
 		ucontrol->value.integer.value[1] = (val >> shift) & mask;
 		if (invert)
 			ucontrol->value.integer.value[1] =
@@ -833,12 +813,9 @@ int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
 	long val = 0;
 	unsigned int regval;
 	unsigned int i;
-	int ret;
 
 	for (i = 0; i < regcount; i++) {
-		ret = snd_soc_component_read(component, regbase+i, &regval);
-		if (ret)
-			return ret;
+		regval = snd_soc_component_read(component, regbase+i);
 		val |= (regval & regwmask) << (regwshift*(regcount-i-1));
 	}
 	val &= mask;
@@ -918,12 +895,8 @@ int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
 	unsigned int mask = 1 << shift;
 	unsigned int invert = mc->invert != 0;
 	unsigned int val;
-	int ret;
-
-	ret = snd_soc_component_read(component, reg, &val);
-	if (ret)
-		return ret;
 
+	val = snd_soc_component_read(component, reg);
 	val &= mask;
 
 	if (shift != 0 && val != 0)