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 fparent@baylibre.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;
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);