From 1d267ea6539f266352f4739c718e278dc62b1df7 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Thu, 12 Feb 2015 15:24:42 +0100 Subject: [PATCH] serial: mctrl-gpio: simplify init routine MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Instead of ignoring errors returned by devm_gpiod_get_index use devm_gpiod_get_index_optional which results in slightly more strict error handling which is good. Also use the fourth parameter to devm_gpiod_get_index_optional to be able to drop the explicit direction setting. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_mctrl_gpio.c | 29 +++++++++++------------------ 1 file changed, 11 insertions(+), 18 deletions(-) diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index c0381a09f12d..5027db7b5814 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.c +++ b/drivers/tty/serial/serial_mctrl_gpio.c @@ -94,27 +94,20 @@ struct mctrl_gpios *mctrl_gpio_init(struct device *dev, unsigned int idx) return ERR_PTR(-ENOMEM); for (i = 0; i < UART_GPIO_MAX; i++) { - gpios->gpio[i] = devm_gpiod_get_index(dev, - mctrl_gpios_desc[i].name, - idx); - - /* - * The GPIOs are maybe not all filled, - * this is not an error. - */ - if (IS_ERR_OR_NULL(gpios->gpio[i])) - continue; + enum gpiod_flags flags; if (mctrl_gpios_desc[i].dir_out) - err = gpiod_direction_output(gpios->gpio[i], 0); + flags = GPIOD_OUT_LOW; else - err = gpiod_direction_input(gpios->gpio[i]); - if (err) { - dev_dbg(dev, "Unable to set direction for %s GPIO", - mctrl_gpios_desc[i].name); - devm_gpiod_put(dev, gpios->gpio[i]); - gpios->gpio[i] = NULL; - } + flags = GPIOD_IN; + + gpios->gpio[i] = + devm_gpiod_get_index_optional(dev, + mctrl_gpios_desc[i].name, + idx, flags); + + if (IS_ERR(gpios->gpio[i])) + return PTR_ERR(gpios->gpio[i]); } return gpios; -- 2.11.0