linux-kernel - [PATCH v3 3/3] ASoC: ts3a227e: add parameters to control debounce times

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 19 Sep 2022 13:12:58 +0200
From:   Astrid Rost <astrid.rost@...s.com>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC:     <kernel@...s.com>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, Astrid Rost <astridr@...s.com>,
        Astrid Rost <astrid.rost@...s.com>
Subject: [PATCH v3 3/3] ASoC: ts3a227e: add parameters to control debounce times

Add devicetree parameters to control the insert, release and press
debounce times.

Signed-off-by: Astrid Rost <astrid.rost@...s.com>
---
 sound/soc/codecs/ts3a227e.c | 58 +++++++++++++++++++++++++++++++++----
 1 file changed, 52 insertions(+), 6 deletions(-)

diff --git a/sound/soc/codecs/ts3a227e.c b/sound/soc/codecs/ts3a227e.c
index d8ab0810fceb..f2d1367c46ca 100644
--- a/sound/soc/codecs/ts3a227e.c
+++ b/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 +277,52 @@ 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;
-- 
2.20.1