ASoC: ts3a227e control debounce times

Merge series from Astrid Rost <astrid.rost@axis.com>:

Add debounce support to the ts3a227e driver.

Documentation/devicetree/bindings/sound/ti,ts3a227e.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/ti,ts3a227e.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TS3A227E
+  Autonomous Audio Accessory Detection and Configuration Switch
+
+maintainers:
+  - Dylan Reid <dgreid@chromium.org>
+
+description: |
+  The TS3A227E detect headsets of 3-ring and 4-ring standards and
+  switches automatically to route the microphone correctly. It also
+  handles key press detection in accordance with the Android audio
+  headset specification v1.0.
+
+properties:
+  compatible:
+    enum:
+      - ti,ts3a227e
+
+  reg:
+    const: 0x3b
+
+  interrupts:
+    maxItems: 1
+
+  ti,micbias:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Intended MICBIAS voltage (datasheet section 9.6.7).
+    enum:
+      - 0 # 2.1 V
+      - 1 # 2.2 V
+      - 2 # 2.3 V
+      - 3 # 2.4 V
+      - 4 # 2.5 V
+      - 5 # 2.6 V
+      - 6 # 2.7 V
+      - 7 # 2.8 V
+    default: 1
+
+  ti,debounce-release-ms:
+    description: key release debounce time in ms (datasheet section 9.6.7).
+    enum:
+      - 0
+      - 20
+    default: 20
+
+  ti,debounce-press-ms:
+    description: key press debounce time in ms (datasheet section 9.6.7).
+    enum:
+      - 2
+      - 40
+      - 80
+      - 120
+    default: 80
+
+  ti,debounce-insertion-ms:
+    description: headset insertion debounce time in ms (datasheet section 9.6.5).
+    enum:
+      - 2
+      - 30
+      - 60
+      - 90
+      - 120
+      - 150
+      - 1000
+      - 2000
+    default: 90
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        codec: audio-controller@3b {
+            compatible = "ti,ts3a227e";
+            reg = <0x3b>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
+        };
+    };
+
+...

Documentation/devicetree/bindings/sound/ts3a227e.txt

-Texas Instruments TS3A227E
-Autonomous Audio Accessory Detection and Configuration Switch
-
-The TS3A227E detect headsets of 3-ring and 4-ring standards and
-switches automatically to route the microphone correctly.  It also
-handles key press detection in accordance with the Android audio
-headset specification v1.0.
-
-Required properties:
-
- - compatible:		Should contain "ti,ts3a227e".
- - reg:			The i2c address. Should contain <0x3b>.
- - interrupts:		Interrupt number for /INT pin from the 227e
-
-Optional properies:
- - ti,micbias:   Intended MICBIAS voltage (datasheet section 9.6.7).
-      Select 0/1/2/3/4/5/6/7 to specify MICBIAS voltage
-      2.1V/2.2V/2.3V/2.4V/2.5V/2.6V/2.7V/2.8V
-      Default value is "1" (2.2V).
-
-Examples:
-
-	i2c {
-		ts3a227e@3b {
-			compatible = "ti,ts3a227e";
-			reg = <0x3b>;
-			interrupt-parent = <&gpio>;
-			interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
-		};
-	};

sound/soc/codecs/ts3a227e.c

@@ -78,12 +78,20 @@ static const int ts3a227e_buttons[] = {
 #define ADC_COMPLETE_INT_DISABLE 0x04
 #define INTB_DISABLE 0x08
 
+/* TS3A227E_REG_SETTING_1 0x4 */
+#define DEBOUNCE_INSERTION_SETTING_SFT (0)
+#define DEBOUNCE_INSERTION_SETTING_MASK (0x7 << DEBOUNCE_PRESS_SETTING_SFT)
+
 /* TS3A227E_REG_SETTING_2 0x05 */
 #define KP_ENABLE 0x04
 
 /* TS3A227E_REG_SETTING_3 0x06 */
-#define MICBIAS_SETTING_SFT (3)
+#define MICBIAS_SETTING_SFT 3
 #define MICBIAS_SETTING_MASK (0x7 << MICBIAS_SETTING_SFT)
+#define DEBOUNCE_RELEASE_SETTING_SFT 2
+#define DEBOUNCE_RELEASE_SETTING_MASK (0x1 << DEBOUNCE_RELEASE_SETTING_SFT)
+#define DEBOUNCE_PRESS_SETTING_SFT 0
+#define DEBOUNCE_PRESS_SETTING_MASK (0x3 << DEBOUNCE_PRESS_SETTING_SFT)
 
 /* TS3A227E_REG_ACCESSORY_STATUS  0x0b */
 #define TYPE_3_POLE 0x01
@@ -136,7 +144,7 @@ static bool ts3a227e_volatile_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case TS3A227E_REG_INTERRUPT ... TS3A227E_REG_INTERRUPT_DISABLE:
-	case TS3A227E_REG_SETTING_2:
+	case TS3A227E_REG_SETTING_1 ... TS3A227E_REG_SETTING_2:
 	case TS3A227E_REG_SWITCH_STATUS_1 ... TS3A227E_REG_ADC_OUTPUT:
 		return true;
 	default:
@@ -269,14 +277,55 @@ static const struct regmap_config ts3a227e_regmap_config = {
 static int ts3a227e_parse_device_property(struct ts3a227e *ts3a227e,
 				struct device *dev)
 {
-	u32 micbias;
+	u32 value;
+	u32 value_ms;
+	u32 setting3_value = 0;
+	u32 setting3_mask = 0;
 	int err;
 
-	err = device_property_read_u32(dev, "ti,micbias", &micbias);
+	err = device_property_read_u32(dev, "ti,micbias", &value);
+	if (!err) {
+		setting3_mask = MICBIAS_SETTING_MASK;
+		setting3_value = (value << MICBIAS_SETTING_SFT) &
+				 MICBIAS_SETTING_MASK;
+	}
+
+	err = device_property_read_u32(dev, "ti,debounce-release-ms",
+				       &value_ms);
 	if (!err) {
+		value = (value_ms > 10);
+		setting3_mask |= DEBOUNCE_RELEASE_SETTING_MASK;
+		setting3_value |= (value << DEBOUNCE_RELEASE_SETTING_SFT) &
+				  DEBOUNCE_RELEASE_SETTING_MASK;
+	}
+
+	err = device_property_read_u32(dev, "ti,debounce-press-ms", &value_ms);
+	if (!err) {
+		value = (value_ms + 20) / 40;
+		if (value > 3)
+			value = 3;
+		setting3_mask |= DEBOUNCE_PRESS_SETTING_MASK;
+		setting3_value |= (value << DEBOUNCE_PRESS_SETTING_SFT) &
+				  DEBOUNCE_PRESS_SETTING_MASK;
+	}
+
+	if (setting3_mask)
 		regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_3,
-			MICBIAS_SETTING_MASK,
-			(micbias & 0x07) << MICBIAS_SETTING_SFT);
+				   setting3_mask, setting3_value);
+
+	err = device_property_read_u32(dev, "ti,debounce-insertion-ms",
+				       &value_ms);
+	if (!err) {
+		if (value_ms < 165)
+			value = (value_ms + 15) / 30;
+		else if (value_ms < 1500)
+			value = 6;
+		else
+			value = 7;
+		regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_1,
+				   DEBOUNCE_INSERTION_SETTING_MASK,
+				   (value << DEBOUNCE_INSERTION_SETTING_SFT) &
+					   DEBOUNCE_INSERTION_SETTING_MASK);
 	}
 
 	return 0;