On Sat, Sep 27, 2014 at 11:46:35AM +0200, Janusz Uzycki wrote:
> @@ -635,7 +645,12 @@ static void mxs_auart_settermios(struct uart_port *u,
> ctrl |= AUART_LINECTRL_STP2;
>
> /* figure out the hardware flow control settings */
> - if (cflag & CRTSCTS) {
> + /* FIXME: Likely DMA could be enabled not only for HW flow control */
> + if (cflag & CRTSCTS &&
> + (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(s->gpios,
> + UART_GPIO_RTS)) ||
> + IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(s->gpios,
> + UART_GPIO_CTS)))) {
There has to be a better way to do this.
> +static int mxs_auart_init_gpios(struct mxs_auart_port *s, struct device *dev)
> +{
> + s->gpios = mctrl_gpio_init(dev, 0);
> + if (IS_ERR_OR_NULL(s->gpios))
> + return -1;
> + return 0;
I personally hate the practise of returning -1 - it ends up getting returned
to userspace as an error code, and it means EPERM. If you want to indicate
success/failure, use the bool return type, and return true/false.
> @@ -1074,6 +1100,11 @@ static int mxs_auart_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, s);
>
> + ret = mxs_auart_init_gpios(s, &pdev->dev);
> + if (ret < 0)
> + dev_err(&pdev->dev, "%s",
> + "Failed to initialize GPIOs. The serial port may not work as expected");
Does the "%s" do anything for this message? More importantly though, it's
lacking a newline.
--
FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.
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