Hello Yegor,
On Mon, May 23, 2016 at 09:30:56AM +0200, yegorslists@xxxxxxxxxxxxxx wrote:
> From: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx>
>
> mctrl_gpio_get_outputs() returns the state of following signals:
>
> RTS, DTR
>
> Signed-off-by: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx>
> ---
> drivers/tty/serial/serial_mctrl_gpio.c | 18 ++++++++++++++++++
> drivers/tty/serial/serial_mctrl_gpio.h | 15 ++++++++++++++-
> 2 files changed, 32 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c
> index e8dd509..a868595 100644
> --- a/drivers/tty/serial/serial_mctrl_gpio.c
> +++ b/drivers/tty/serial/serial_mctrl_gpio.c
> @@ -86,6 +86,24 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl)
> }
> EXPORT_SYMBOL_GPL(mctrl_gpio_get);
>
> +unsigned int
> +mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl)
> +{
> + enum mctrl_gpio_idx i;
> +
> + for (i = 0; i < UART_GPIO_MAX; i++) {
> + if (gpios->gpio[i] && mctrl_gpios_desc[i].dir_out) {
> + if (gpiod_get_value(gpios->gpio[i]))
> + *mctrl |= mctrl_gpios_desc[i].mctrl;
> + else
> + *mctrl &= ~mctrl_gpios_desc[i].mctrl;
Given that get_value for outputs isn't well defined I'd prefer if there
were no usecase for this. This is intended for probe-time, right?
Otherwise the state of these lines should be known.
> + }
> + }
> +
> + return *mctrl;
> +}
> +EXPORT_SYMBOL_GPL(mctrl_gpio_get_outputs);
> +
> struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx)
> {
> struct mctrl_gpios *gpios;
> diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
> index 332a33a..fa000bc 100644
> --- a/drivers/tty/serial/serial_mctrl_gpio.h
> +++ b/drivers/tty/serial/serial_mctrl_gpio.h
> @@ -48,12 +48,19 @@ struct mctrl_gpios;
> void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl);
>
> /*
> - * Get state of the modem control output lines from GPIOs.
> + * Get state of the modem control input lines from GPIOs.
This looks right, should be a separate patch or mentioned in the commit
log.
> +unsigned int
> +mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl);
Personally I'd prefer the following formatting:
unsigned int mctrl_gpio_get_outputs(struct mctrl_gpios *gpios,
unsigned int *mctrl)
I didn't check though which of these two is more consistent in that
file.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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