linux-kernel - [PATCH 2/2] pinctrl: at91-pio4: Add persist state case in config

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Date:   Fri, 7 Oct 2022 08:16:47 -0700
From:   <Ryan.Wanner@...rochip.com>
To:     <ludovic.desroches@...rochip.com>, <linus.walleij@...aro.org>,
        <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <claudiu.beznea@...rochip.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Ryan Wanner <Ryan.Wanner@...rochip.com>
Subject: [PATCH 2/2] pinctrl: at91-pio4: Add persist state case in config

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

Adding persist state case to atmel_conf_pin_config_group_set() function.
After adding configuration support for userspace gpiod api, there was an
extra flag PIN_CONFIG_PERSIST_STATE that was not passed in before.

Based on other drivers like TI drivers, added a switch case and return
ENOTSUPP in that case.

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

diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
index 13b77f1eb6e2..40f1b9397767 100644
--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -780,6 +780,8 @@ static int atmel_conf_pin_config_group_get(struct pinctrl_dev *pctldev,
 			return -EINVAL;
 		arg = (res & ATMEL_PIO_DRVSTR_MASK) >> ATMEL_PIO_DRVSTR_OFFSET;
 		break;
+	case PIN_CONFIG_PERSIST_STATE:
+		return -ENOTSUPP;
 	default:
 		return -ENOTSUPP;
 	}
@@ -888,6 +890,8 @@ static int atmel_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
 				dev_warn(pctldev->dev, "drive strength not updated (incorrect value)\n");
 			}
 			break;
+		case PIN_CONFIG_PERSIST_STATE:
+			return -ENOTSUPP;
 		default:
 			dev_warn(pctldev->dev,
 				 "unsupported configuration parameter: %u\n",
-- 
2.34.1