[U-Boot] [PATCH v3 1/7] mmc: mtk-sd: add source_cg clock support
Fabien Parent
fparent at baylibre.com
Sun Mar 24 15:46:32 UTC 2019
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 at baylibre.com>
Acked-by: Ryder Lee <ryder.lee at mediatek.com>
---
v3:
* No change
v2:
* Get rid of variable has_src_clk_cg
---
drivers/mmc/mtk-sd.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/mmc/mtk-sd.c b/drivers/mmc/mtk-sd.c
index d3f0778368..eed98b769c 100644
--- a/drivers/mmc/mtk-sd.c
+++ b/drivers/mmc/mtk-sd.c
@@ -247,6 +247,7 @@ 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 */
u32 src_clk_freq; /* source clock */
@@ -1269,6 +1270,8 @@ static void msdc_ungate_clock(struct msdc_host *host)
{
clk_enable(&host->src_clk);
clk_enable(&host->h_clk);
+ if (host->src_clk_cg.dev)
+ clk_enable(&host->src_clk_cg);
}
static int msdc_drv_probe(struct udevice *dev)
@@ -1332,6 +1335,8 @@ static int msdc_ofdata_to_platdata(struct udevice *dev)
if (ret < 0)
return ret;
+ clk_get_by_name(dev, "source_cg", &host->src_clk_cg); /* optional */
+
#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);
--
2.20.1
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