linux-kernel - [PATCH] spi-at91-usart: replacing legacy gpio interface for gpiod

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Date:   Tue, 19 Oct 2021 15:05:24 -0300
From:   Maíra Canal <maira.canal@....br>
To:     broonie@...nel.org, radu_nicolae.pirea@....ro
Cc:     nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
        ludovic.desroches@...rochip.com, linux-spi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] spi-at91-usart: replacing legacy gpio interface for gpiod

Removing dependency of linux/of_gpio.h and replacing it for
linux/gpio/consumer.h

Signed-off-by: Maíra Canal <maira.canal@....br>
---
 drivers/spi/spi-at91-usart.c | 27 +++++----------------------
 1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/drivers/spi/spi-at91-usart.c b/drivers/spi/spi-at91-usart.c
index 8c8352625d23..9cd738682aab 100644
--- a/drivers/spi/spi-at91-usart.c
+++ b/drivers/spi/spi-at91-usart.c
@@ -14,7 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of_platform.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
@@ -482,29 +482,12 @@ static void at91_usart_spi_init(struct at91_usart_spi *aus)
 
 static int at91_usart_gpio_setup(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.parent->of_node;
-	int i;
-	int ret;
-	int nb;
-
-	if (!np)
-		return -EINVAL;
-
-	nb = of_gpio_named_count(np, "cs-gpios");
-	for (i = 0; i < nb; i++) {
-		int cs_gpio = of_get_named_gpio(np, "cs-gpios", i);
+	struct gpio_descs *cs_gpios;
 
-		if (cs_gpio < 0)
-			return cs_gpio;
+	cs_gpios = devm_gpiod_get_array_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 
-		if (gpio_is_valid(cs_gpio)) {
-			ret = devm_gpio_request_one(&pdev->dev, cs_gpio,
-						    GPIOF_DIR_OUT,
-						    dev_name(&pdev->dev));
-			if (ret)
-				return ret;
-		}
-	}
+	if (IS_ERR(cs_gpios))
+		return PTR_ERR(cs_gpios);
 
 	return 0;
 }
-- 
2.31.1