[PATCH v3 2/7] pinctrl: pinconf-generic: Add properties 'input-voltage-microvolt'

[Yu-Chun Lin <eleanor.lin@realtek.com>]

From: Tzuyi Chang <tychang@realtek.com>

Add a new generic pin configuration parameter PIN_CONFIG_INPUT_VOLTAGE_UV.
This parameter is used to specify the input voltage level of a pin in
microvolts, which corresponds to the 'input-voltage-microvolt' property
in Device Tree.

Signed-off-by: Tzuyi Chang <tychang@realtek.com>
Co-developed-by: Yu-Chun Lin <eleanor.lin@realtek.com>
Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
---
Changes in v3:
- None
---
 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 855ca973a1c8..06cdc885a442 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -57,6 +57,7 @@ static const struct pin_config_item conf_items[] = {
 	PCONFDUMP(PIN_CONFIG_SKEW_DELAY, "skew delay", NULL, true),
 	PCONFDUMP(PIN_CONFIG_SKEW_DELAY_INPUT_PS, "input skew delay", "ps", true),
 	PCONFDUMP(PIN_CONFIG_SKEW_DELAY_OUTPUT_PS, "output skew delay", "ps", true),
+	PCONFDUMP(PIN_CONFIG_INPUT_VOLTAGE_UV, "input voltage in microvolt", "uV", true),
 };
 
 static void pinconf_generic_dump_one(struct pinctrl_dev *pctldev,
@@ -203,6 +204,7 @@ static const struct pinconf_generic_params dt_params[] = {
 	{ "skew-delay", PIN_CONFIG_SKEW_DELAY, 0 },
 	{ "skew-delay-input-ps", PIN_CONFIG_SKEW_DELAY_INPUT_PS, 0 },
 	{ "skew-delay-output-ps", PIN_CONFIG_SKEW_DELAY_OUTPUT_PS, 0 },
+	{ "input-voltage-microvolt", PIN_CONFIG_INPUT_VOLTAGE_UV, 0 },
 };
 
 /**
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h
index 531dc3e9b3f7..a5d4b2d8633a 100644
--- a/include/linux/pinctrl/pinconf-generic.h
+++ b/include/linux/pinctrl/pinconf-generic.h
@@ -83,6 +83,8 @@ struct pinctrl_map;
  *      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_INPUT_VOLTAGE_UV: this will configure the input voltage level of
+ * the pin. The argument is specified in microvolts.
  * @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
@@ -145,6 +147,7 @@ enum pin_config_param {
 	PIN_CONFIG_INPUT_SCHMITT,
 	PIN_CONFIG_INPUT_SCHMITT_ENABLE,
 	PIN_CONFIG_INPUT_SCHMITT_UV,
+	PIN_CONFIG_INPUT_VOLTAGE_UV,
 	PIN_CONFIG_MODE_LOW_POWER,
 	PIN_CONFIG_MODE_PWM,
 	PIN_CONFIG_LEVEL,
-- 
2.34.1