ASoC: sta350: add support for bits in miscellaneous registers

Add support for RPDNEN, NSHHPEN, BRIDGOFF, CPWMEN and PNDLSL, and add DT
bindings to access them.

Signed-off-by: Daniel Mack <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/st,sta350.txt

···
   -  st,invalid-input-detect-mute:
 	If present, automatic invalid input detect mute is enabled.
 
+  -  st,activate-mute-output:
+	If present, a mute output will be activated in ase the volume will
+	reach a value lower than -76 dBFS.
 
+  -  st,bridge-immediate-off:
+	If present, the bridge will be switched off immediately after the
+	power-down-gpio goes low. Otherwise, the bridge will wait for 13
+	million clock cycles to pass before shutting down.
+
+  -  st,noise-shape-dc-cut:
+	If present, the noise-shaping technique on the DC cutoff filter are
+	enabled.
+
+  -  st,powerdown-master-volume:
+	If present, the power-down pin and I2C power-down functions will
+	act on the master volume. Otherwise, the functions will act on the
+	mute commands.
+
+  -  st,powerdown-delay-divider:
+	If present, the bridge power-down time will be divided by the provided
+	value. If not specified, a divider of 1 will be used. Allowed values
+	are 1, 2, 4, 8, 16, 32, 64 and 128.
+	This property has to be specified as '/bits/ 8' value.
 
 Example:
 

include/sound/sta350.h

···
 	u8 ch3_output_mapping;
 	u8 ffx_power_output_mode;
 	u8 drop_compensation_ns;
+	u8 powerdown_delay_divider;
 	unsigned int thermal_warning_recovery:1;
 	unsigned int thermal_warning_adjustment:1;
 	unsigned int fault_detect_recovery:1;
···
 	unsigned int odd_pwm_speed_mode:1;
 	unsigned int distortion_compensation:1;
 	unsigned int invalid_input_detect_mute:1;
+	unsigned int activate_mute_output:1;
+	unsigned int bridge_immediate_off:1;
+	unsigned int noise_shape_dc_cut:1;
+	unsigned int powerdown_master_vol:1;
 };
 
 #endif /* __LINUX_SND__STA350_H */

sound/soc/codecs/sta350.c

···
 			   pdata->ch3_output_mapping
 				<< STA350_CxCFG_OM_SHIFT);
 
+	/* miscellaneous registers */
+	regmap_update_bits(sta350->regmap, STA350_MISC1,
+			   STA350_MISC1_CPWMEN,
+			   pdata->activate_mute_output ?
+				STA350_MISC1_CPWMEN : 0);
+	regmap_update_bits(sta350->regmap, STA350_MISC1,
+			   STA350_MISC1_BRIDGOFF,
+			   pdata->bridge_immediate_off ?
+				STA350_MISC1_BRIDGOFF : 0);
+	regmap_update_bits(sta350->regmap, STA350_MISC1,
+			   STA350_MISC1_NSHHPEN,
+			   pdata->noise_shape_dc_cut ?
+				STA350_MISC1_NSHHPEN : 0);
+	regmap_update_bits(sta350->regmap, STA350_MISC1,
+			   STA350_MISC1_RPDNEN,
+			   pdata->powerdown_master_vol ?
+				STA350_MISC1_RPDNEN: 0);
+
+	regmap_update_bits(sta350->regmap, STA350_MISC2,
+			   STA350_MISC2_PNDLSL_MASK,
+			   pdata->powerdown_delay_divider
+				<< STA350_MISC2_PNDLSL_SHIFT);
+
 	/* initialize coefficient shadow RAM with reset values */
 	for (i = 4; i <= 49; i += 5)
 		sta350->coef_shadow[i] = 0x400000;
···
 	struct sta350_platform_data *pdata;
 	const char *ffx_power_mode;
 	u16 tmp;
+	u8 tmp8;
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
···
 	/* CONFF */
 	if (of_get_property(np, "st,invalid-input-detect-mute", NULL))
 		pdata->invalid_input_detect_mute = 1;
+
+	/* MISC */
+	if (of_get_property(np, "st,activate-mute-output", NULL))
+		pdata->activate_mute_output = 1;
+
+	if (of_get_property(np, "st,bridge-immediate-off", NULL))
+		pdata->bridge_immediate_off = 1;
+
+	if (of_get_property(np, "st,noise-shape-dc-cut", NULL))
+		pdata->noise_shape_dc_cut = 1;
+
+	if (of_get_property(np, "st,powerdown-master-volume", NULL))
+		pdata->powerdown_master_vol = 1;
+
+	if (!of_property_read_u8(np, "st,powerdown-delay-divider", &tmp8)) {
+		if (is_power_of_2(tmp8) && tmp8 >= 1 && tmp8 <= 128)
+			pdata->powerdown_delay_divider = ilog2(tmp8);
+		else
+			dev_warn(dev, "Unsupported powerdown delay divider %d\n",
+				 tmp8);
+	}
 
 	sta350->pdata = pdata;
 

sound/soc/codecs/sta350.h

···
 #define STA350_C3_MIX1		60
 #define STA350_C3_MIX2		61
 
+/* miscellaneous register 1 */
+#define STA350_MISC1_CPWMEN	BIT(2)
+#define STA350_MISC1_BRIDGOFF	BIT(5)
+#define STA350_MISC1_NSHHPEN	BIT(6)
+#define STA350_MISC1_RPDNEN	BIT(7)
+
+/* miscellaneous register 2 */
+#define STA350_MISC2_PNDLSL_MASK	0x1c
+#define STA350_MISC2_PNDLSL_SHIFT	2
+
 #endif /* _ASOC_STA_350_H */