On Mon, 2019-02-04 at 11:58 +0100, Fabien Parent wrote:
> Some MediaTek SoC need an additional clock "source_cg". Enable
> this new clock. We reuse the same clock name as in the kernel.
>
> Signed-off-by: Fabien Parent <fpar...@baylibre.com>
Acked-by: Ryder Lee <ryder....@mediatek.com>
> ---
> drivers/mmc/mtk-sd.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/mmc/mtk-sd.c b/drivers/mmc/mtk-sd.c
> index d3f0778368..8573ea7430 100644
> --- a/drivers/mmc/mtk-sd.c
> +++ b/drivers/mmc/mtk-sd.c
> @@ -247,7 +247,9 @@ struct msdc_host {
> struct msdc_compatible *dev_comp;
>
> struct clk src_clk; /* for SD/MMC bus clock */
> + struct clk src_clk_cg; /* optional, MSDC source clock control gate */
> struct clk h_clk; /* MSDC core clock */
> + bool has_src_clk_cg;
<just_checking>
Could we have a chance to get rid of this flag?
</just_checking>
> u32 src_clk_freq; /* source clock */
> u32 mclk; /* mmc framework required bus clock */
> @@ -1269,6 +1271,8 @@ static void msdc_ungate_clock(struct msdc_host *host)
> {
> clk_enable(&host->src_clk);
> clk_enable(&host->h_clk);
> + if (host->has_src_clk_cg)
> + clk_enable(&host->src_clk_cg);
> }
>
> static int msdc_drv_probe(struct udevice *dev)
> @@ -1332,6 +1336,10 @@ static int msdc_ofdata_to_platdata(struct udevice *dev)
> if (ret < 0)
> return ret;
>
> + ret = clk_get_by_name(dev, "source_cg", &host->src_clk_cg); /* optional
> */
> + if (!ret)
> + host->has_src_clk_cg = true;
> +
> #if IS_ENABLED(DM_GPIO)
> gpio_request_by_name(dev, "wp-gpios", 0, &host->gpio_wp, GPIOD_IS_IN);
> gpio_request_by_name(dev, "cd-gpios", 0, &host->gpio_cd, GPIOD_IS_IN);
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