linux-kernel - [PATCH 2/2] pinctrl: pinconf-generic: Add support for "input-schmitt-microvolt" property

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Message-ID:
 <IA1PR20MB4953806785BA04E075DC4F03BBAC2@IA1PR20MB4953.namprd20.prod.outlook.com>
Date: Thu, 18 Jul 2024 10:23:54 +0800
From: Inochi Amaoto <inochiama@...look.com>
To: Linus Walleij <linus.walleij@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: Inochi Amaoto <inochiama@...look.com>,
	linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] pinctrl: pinconf-generic: Add support for "input-schmitt-microvolt" property

Add "input-schmitt-microvolt" property to generic options used for DT
parsing files. This enables drivers, which use generic pin configurations,
to get the value passed to this property.

Signed-off-by: Inochi Amaoto <inochiama@...look.com>
---
 drivers/pinctrl/pinconf-generic.c       | 2 ++
 include/linux/pinctrl/pinconf-generic.h | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index 80de389199bd..b9860fd31cbf 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -44,6 +44,7 @@ static const struct pin_config_item conf_items[] = {
 	PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "usec", true),
 	PCONFDUMP(PIN_CONFIG_INPUT_ENABLE, "input enabled", NULL, false),
 	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL, false),
+	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_UV, "input schmitt threshold", "uV", true),
 	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_ENABLE, "input schmitt enabled", NULL, false),
 	PCONFDUMP(PIN_CONFIG_MODE_LOW_POWER, "pin low power", "mode", true),
 	PCONFDUMP(PIN_CONFIG_OUTPUT_ENABLE, "output enabled", NULL, false),
@@ -177,6 +178,7 @@ static const struct pinconf_generic_params dt_params[] = {
 	{ "input-schmitt", PIN_CONFIG_INPUT_SCHMITT, 0 },
 	{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
 	{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
+	{ "input-schmitt-microvolts", PIN_CONFIG_INPUT_SCHMITT_UV, 0 },
 	{ "low-power-disable", PIN_CONFIG_MODE_LOW_POWER, 0 },
 	{ "low-power-enable", PIN_CONFIG_MODE_LOW_POWER, 1 },
 	{ "output-disable", PIN_CONFIG_OUTPUT_ENABLE, 0 },
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h
index a65d3d078e58..53cfde98433d 100644
--- a/include/linux/pinctrl/pinconf-generic.h
+++ b/include/linux/pinctrl/pinconf-generic.h
@@ -81,6 +81,8 @@ struct pinctrl_map;
  * @PIN_CONFIG_INPUT_SCHMITT_ENABLE: control schmitt-trigger mode on the pin.
  *      If the argument != 0, schmitt-trigger mode is enabled. If it's 0,
  *      schmitt-trigger mode is disabled.
+ * @PIN_CONFIG_INPUT_SCHMITT_UV: this will configure an input pin to run in
+ *	schmitt-trigger mode. The argument is in uV.
  * @PIN_CONFIG_MODE_LOW_POWER: this will configure the pin for low power
  *	operation, if several modes of operation are supported these can be
  *	passed in the argument on a custom form, else just use argument 1
@@ -132,6 +134,7 @@ enum pin_config_param {
 	PIN_CONFIG_INPUT_ENABLE,
 	PIN_CONFIG_INPUT_SCHMITT,
 	PIN_CONFIG_INPUT_SCHMITT_ENABLE,
+	PIN_CONFIG_INPUT_SCHMITT_UV,
 	PIN_CONFIG_MODE_LOW_POWER,
 	PIN_CONFIG_MODE_PWM,
 	PIN_CONFIG_OUTPUT,
--
2.45.2