linux-kernel - [PATCH 1/3] pinctrl: at91-pio4: Enable Push-Pull configuration

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Date:   Wed, 17 May 2023 13:54:04 +0200
From:   <Ryan.Wanner@...rochip.com>
To:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <claudiu.beznea@...rochip.com>,
        <linus.walleij@...aro.org>, <ludovic.desroches@...rochip.com>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        Ryan Wanner <Ryan.Wanner@...rochip.com>
Subject: [PATCH 1/3] pinctrl: at91-pio4: Enable Push-Pull configuration

From: Ryan Wanner <Ryan.Wanner@...rochip.com>

Enable push-pull configuration. Remove integer value argument from
open-drain configuration as it is discarded when pinconf function is
called from gpiolib. Add push-pull do debug and get functions.

Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
---
 drivers/pinctrl/pinctrl-at91-pio4.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
index 2fe40acb6a3e..3c39d62bbc3c 100644
--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -762,6 +762,11 @@ static int atmel_conf_pin_config_group_get(struct pinctrl_dev *pctldev,
 			return -EINVAL;
 		arg = 1;
 		break;
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		if (res & ATMEL_PIO_OPD_MASK)
+			return -EINVAL;
+		arg = 1;
+		break;
 	case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 		if (!(res & ATMEL_PIO_SCHMITT_MASK))
 			return -EINVAL;
@@ -827,10 +832,10 @@ static int atmel_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
 			conf &= (~ATMEL_PIO_PUEN_MASK);
 			break;
 		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
-			if (arg == 0)
-				conf &= (~ATMEL_PIO_OPD_MASK);
-			else
-				conf |= ATMEL_PIO_OPD_MASK;
+			conf |= ATMEL_PIO_OPD_MASK;
+			break;
+		case PIN_CONFIG_DRIVE_PUSH_PULL:
+			conf &= (~ATMEL_PIO_OPD_MASK);
 			break;
 		case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 			if (arg == 0)
@@ -948,6 +953,8 @@ static void atmel_conf_pin_config_dbg_show(struct pinctrl_dev *pctldev,
 		seq_printf(s, "%s ", "debounce");
 	if (conf & ATMEL_PIO_OPD_MASK)
 		seq_printf(s, "%s ", "open-drain");
+	if (!(conf & ATMEL_PIO_OPD_MASK))
+		seq_printf(s, "%s ", "push-pull");
 	if (conf & ATMEL_PIO_SCHMITT_MASK)
 		seq_printf(s, "%s ", "schmitt");
 	if (atmel_pioctrl->slew_rate_support && (conf & ATMEL_PIO_SR_MASK))
-- 
2.39.2