[PATCH linux dev-5.8 3/4] fsi: Aspeed master: Set clock frequency from devicetree

[Joel Stanley]

On Mon, 24 Aug 2020 at 22:11, Eddie James <eajames at linux.ibm.com> wrote:
>
> Set the FSI clock frequency based on the value encoded in the
> devicetree, if present.

Should we default it to 166 if it's not present?

Reviewed-by: Joel Stanley <joel at jms.id.au>

>
> Signed-off-by: Eddie James <eajames at linux.ibm.com>
> ---
>  drivers/fsi/fsi-master-aspeed.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
> index c006ec008a1a..aedcc9be48ca 100644
> --- a/drivers/fsi/fsi-master-aspeed.c
> +++ b/drivers/fsi/fsi-master-aspeed.c
> @@ -515,6 +515,7 @@ static int fsi_master_aspeed_probe(struct platform_device *pdev)
>         struct fsi_master_aspeed *aspeed;
>         struct resource *res;
>         int rc, links, reg;
> +       u32 clk_freq;
>         __be32 raw;
>
>         rc = tacoma_cabled_fsi_fixup(&pdev->dev);
> @@ -539,6 +540,11 @@ static int fsi_master_aspeed_probe(struct platform_device *pdev)
>                 dev_err(aspeed->dev, "couldn't get clock\n");
>                 return PTR_ERR(aspeed->clk);
>         }
> +
> +       if (!of_property_read_u32(pdev->dev.of_node, "clock-frequency",
> +                                 &clk_freq))
> +               clk_set_rate(aspeed->clk, clk_freq);
> +
>         rc = clk_prepare_enable(aspeed->clk);
>         if (rc) {
>                 dev_err(aspeed->dev, "couldn't enable clock\n");
> --
> 2.26.2
>