Re: [PATCH v2, 3/3] tty/serial: meson_uart: add the core clock handling to the driver

Jerome Brunet
2017-03-28T19:16:23Z

On Tue, 2017-03-28 at 11:25 +0200, Helmut Klein wrote:
> This patch gets the core clock as provided by the DT and enables it.
> The code was taken from Amlogic's serial driver, and was tested on my
> board.
>
> Signed-off-by: Helmut Klein <hgkr.klein@gmail.com>
> ---
>  drivers/tty/serial/meson_uart.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
> index 60f16795d16b..cb99112288eb 100644
> --- a/drivers/tty/serial/meson_uart.c
> +++ b/drivers/tty/serial/meson_uart.c
> @@ -600,6 +600,7 @@ static int meson_uart_probe(struct platform_device *pdev)
>   struct resource *res_mem, *res_irq;
>   struct uart_port *port;
>   struct clk *clk;
> + struct clk *core_clk;
>   int ret = 0;
>
>   if (pdev->dev.of_node)
> @@ -625,6 +626,15 @@ static int meson_uart_probe(struct platform_device *pdev)
>   if (!port)
>   return -ENOMEM;
>
> + core_clk = devm_clk_get(&pdev->dev, "core");
> + if (!IS_ERR(core_clk)) {
> + ret = clk_prepare_enable(core_clk);
> + if (ret) {
> + dev_err(&pdev->dev, "couldn't enable clkc\n");
> + return ret;
> + }
> + }
> +
>   clk = clk_get(&pdev->dev, NULL);
Now that you have 2 clocks, shouldn't this be named as well ?

>   if (IS_ERR(clk))
>   return PTR_ERR(clk);
> --
> 2.11.0
>
>
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