On Mon, Jun 03, 2019 at 10:33:32AM +0200, Stefan Roese wrote:
> From: Yegor Yefremov <yegorsli...@googlemail.com>
>
> This patch permits the usage for GPIOs to control
> the CTS/RTS/DTR/DSR/DCD/RI signals.
> + if (up->gpios) {
> + mctrl_gpio_set(up->gpios, mctrl_gpio);
> + }
...
> + if (up->gpios) {
> + mctrl_gpio = mctrl_gpio_get_outputs(up->gpios, &mctrl_gpio);
> + }
...
> + gpios = mctrl_gpio_init(&uart->port, 0);
> + if (IS_ERR(gpios)) {
> + if (PTR_ERR(gpios) != -ENOSYS)
> + return PTR_ERR(gpios);
> + }
...
> + if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
> + UART_GPIO_RTS))) {
> + }
...
> - if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW) {
> + if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW
> + && IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
> + UART_GPIO_RTS))) {
> }
...
> + if (up->gpios)
> + mctrl_gpio_disable_ms(up->gpios);
...
> + if (up->gpios)
> + mctrl_gpio_enable_ms(up->gpios);
...
> + if (up->gpios)
> + return mctrl_gpio_get(up->gpios, &ret);
Can we rather make this mimic the gpiod_get_optional() API?
So, if we get an error, it's an error, otherwise with NULL pointer the
operations goes to be no-op.
[IS_ERR_OR_NULL() -> IS_ERR(), if (up->gpios) -> /dev/null, etc]
--
With Best Regards,
Andy Shevchenko
