diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2015-02-12 14:24:42 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-07 02:15:04 (GMT) |
| commit | 1d267ea6539f266352f4739c718e278dc62b1df7 (patch) | |
| tree | 6835a58888a86ec7cb697a91e93266a0f2780969 /drivers/tty/serial/serial_mctrl_gpio.c | |
| parent | 9e9f079c56517568868788945dc4a080de6e150b (diff) | |
| download | linux-1d267ea6539f266352f4739c718e278dc62b1df7.tar.xz | |
serial: mctrl-gpio: simplify init routine
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 <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/serial_mctrl_gpio.c')
| -rw-r--r-- | drivers/tty/serial/serial_mctrl_gpio.c | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index c0381a0..5027db7 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; |