linux-kernel - [PATCH 3/4] pinctrl: amd: Unify debounce handling into amd_pinconf

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Message-ID: <20230630194716.6497-4-mario.limonciello@amd.com>
Date:   Fri, 30 Jun 2023 14:47:15 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     <Basavaraj.Natikar@....com>, <Shyam-sundar.S-k@....com>,
        <linus.walleij@...aro.org>
CC:     <npliashechnikov@...il.com>, <nmschulte@...il.com>,
        <friedrich.vock@....de>, <dridri85@...il.com>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH 3/4] pinctrl: amd: Unify debounce handling into amd_pinconf_set()

Debounce handling is done in two different entry points in the driver.
Unify this to make sure that it's always handled the same.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/pinctrl/pinctrl-amd.c | 38 +++++++++++++++--------------------
 1 file changed, 16 insertions(+), 22 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
index cd46a5200f9b4..a22e02e2f5d35 100644
--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -115,16 +115,12 @@ static void amd_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
 	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
 }
 
-static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
-		unsigned debounce)
+static int amd_gpio_set_debounce(struct amd_gpio *gpio_dev, unsigned offset,
+				 unsigned debounce)
 {
 	u32 time;
 	u32 pin_reg;
 	int ret = 0;
-	unsigned long flags;
-	struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
-
-	raw_spin_lock_irqsave(&gpio_dev->lock, flags);
 
 	/* Use special handling for Pin0 debounce */
 	if (offset == 0) {
@@ -183,23 +179,10 @@ static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
 		pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
 	}
 	writel(pin_reg, gpio_dev->base + offset * 4);
-	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
 
 	return ret;
 }
 
-static int amd_gpio_set_config(struct gpio_chip *gc, unsigned offset,
-			       unsigned long config)
-{
-	u32 debounce;
-
-	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
-		return -ENOTSUPP;
-
-	debounce = pinconf_to_config_argument(config);
-	return amd_gpio_set_debounce(gc, offset, debounce);
-}
-
 #ifdef CONFIG_DEBUG_FS
 static void amd_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gc)
 {
@@ -794,9 +777,8 @@ static int amd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 
 		switch (param) {
 		case PIN_CONFIG_INPUT_DEBOUNCE:
-			pin_reg &= ~DB_TMR_OUT_MASK;
-			pin_reg |= arg & DB_TMR_OUT_MASK;
-			break;
+			ret = amd_gpio_set_debounce(gpio_dev, pin, arg);
+			goto out;
 
 		case PIN_CONFIG_BIAS_PULL_DOWN:
 			pin_reg &= ~BIT(PULL_DOWN_ENABLE_OFF);
@@ -823,6 +805,7 @@ static int amd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 
 		writel(pin_reg, gpio_dev->base + pin*4);
 	}
+out:
 	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
 
 	return ret;
@@ -864,6 +847,17 @@ static int amd_pinconf_group_set(struct pinctrl_dev *pctldev,
 	return 0;
 }
 
+static int amd_gpio_set_config(struct gpio_chip *gc, unsigned pin,
+			       unsigned long config)
+{
+	struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	return amd_pinconf_set(gpio_dev->pctrl, pin, &config, 1);
+}
+
 static const struct pinconf_ops amd_pinconf_ops = {
 	.pin_config_get		= amd_pinconf_get,
 	.pin_config_set		= amd_pinconf_set,
-- 
2.34.1