ASoC: codecs: tas675x: misc bugfixes and minor changes

Sen Wang <sen@ti.com> says:

Few miscellaneous bug fixes after the initial merge of TAS675x driver, of
which includes:

- Adding READ_ONCE for all concurrent read params
- Corrected kcontrol bits for temperature range
- Corrected conversion notes in the driver documentation

Link: https://patch.msgid.link/20260630183126.2588322-1-sen@ti.com

Author: broonie

Documentation/sound/codecs/tas675x.rst

@@ -281,18 +281,19 @@ Global Temperature
 :Description: Global die temperature sense register.
 :Type:        Integer (read-only)
 :Range:       0 to 255
-:Conversion:  (value × 0.5 °C) − 50 °C
+:Conversion:  value × 2.19 K; subtract 273.15 for °C
 :Register:    0x75
 
 CHx Temperature Range
 ---------------------
 
 :Description: Per-channel coarse temperature range indicator (x = 1, 2, 3, 4).
 :Type:        Integer (read-only)
-:Range:       0 to 3
-:Mapping:     0 = <80 °C, 1 = 80–100 °C, 2 = 100–120 °C, 3 = >120 °C
-:Register:    0xBB bits [7:6] (CH1), bits [5:4] (CH2),
-              0xBC bits [3:2] (CH3), bits [1:0] (CH4)
+:Range:       0 to 7
+:Mapping:     0 = <95 °C, 1 = 95–110 °C, 2 = 110–125 °C, 3 = 125–135 °C,
+              4 = 135–145 °C, 5 = 145–155 °C, 6 = 155–165 °C, 7 = >165 °C
+:Register:    0xBB bits [2:0] (CH1), bits [5:3] (CH2),
+              0xBC bits [2:0] (CH3), bits [5:3] (CH4)
 
 Load Diagnostics
 ================

sound/soc/codecs/tas675x.c

@@ -954,10 +954,10 @@ static const struct snd_kcontrol_new tas675x_snd_controls[] = {
 	/* Temperature and Voltage Monitoring */
 	SOC_SINGLE_RO("PVDD Sense", TAS675X_PVDD_SENSE_REG, 0, 0xFF),
 	SOC_SINGLE_RO("Global Temperature", TAS675X_TEMP_GLOBAL_REG, 0, 0xFF),
-	SOC_SINGLE_RO("CH1 Temperature Range", TAS675X_TEMP_CH1_CH2_REG, 6, 3),
-	SOC_SINGLE_RO("CH2 Temperature Range", TAS675X_TEMP_CH1_CH2_REG, 4, 3),
-	SOC_SINGLE_RO("CH3 Temperature Range", TAS675X_TEMP_CH3_CH4_REG, 2, 3),
-	SOC_SINGLE_RO("CH4 Temperature Range", TAS675X_TEMP_CH3_CH4_REG, 0, 3),
+	SOC_SINGLE_RO("CH1 Temperature Range", TAS675X_TEMP_CH1_CH2_REG, 0, 7),
+	SOC_SINGLE_RO("CH2 Temperature Range", TAS675X_TEMP_CH1_CH2_REG, 3, 7),
+	SOC_SINGLE_RO("CH3 Temperature Range", TAS675X_TEMP_CH3_CH4_REG, 0, 7),
+	SOC_SINGLE_RO("CH4 Temperature Range", TAS675X_TEMP_CH3_CH4_REG, 3, 7),
 
 	/* Speaker Protection & Detection */
 	SOC_SINGLE("Tweeter Detection Switch", TAS675X_TWEETER_DETECT_CTRL_REG, 0, 1, 1),
@@ -1133,7 +1133,7 @@ static int tas675x_hw_params(struct snd_pcm_substream *substream,
 	 * Single clock domain: SDIN and SDOUT share one SCLK/FSYNC pair,
 	 * so all active DAIs must use the same sample rate.
 	 */
-	if ((tas->active_playback_dais || tas->active_capture_dais) &&
+	if ((READ_ONCE(tas->active_playback_dais) || READ_ONCE(tas->active_capture_dais)) &&
 	    tas->rate && tas->rate != rate) {
 		dev_err(component->dev,
 			"Rate %u conflicts with active rate %u\n",
@@ -1397,14 +1397,14 @@ static int tas675x_mute_stream(struct snd_soc_dai *dai, int mute, int direction)
 		set_bit(dai->id, &tas->active_playback_dais);
 
 	/* Last playback stream */
-	if (mute && !tas->active_playback_dais) {
+	if (mute && !READ_ONCE(tas->active_playback_dais)) {
 		ret = tas675x_set_state_all(tas, TAS675X_STATE_SLEEP_BOTH);
 		regmap_read(tas->regmap, TAS675X_CLK_FAULT_LATCHED_REG, &discard);
 		return ret;
 	}
 
 	return tas675x_set_state_all(tas,
-				     tas->active_playback_dais ?
+				     READ_ONCE(tas->active_playback_dais) ?
 					TAS675X_STATE_PLAY_BOTH :
 					TAS675X_STATE_SLEEP_BOTH);
 }