[PATCH 3/4] mmc: sdhci-of-k1: Set clock-frequency of io clock

[Yixun Lan <dlan@kernel.org>]

From: Long Wan <long.wan@linux.spacemit.com>

Add a clock-frequency property to set the rate of io clock, for SDIO
case, a clock frequency need to propagate down early.

Signed-off-by: Long Wan <long.wan@linux.spacemit.com>
Signed-off-by: Yixun Lan <dlan@kernel.org>
---
 drivers/mmc/host/sdhci-of-k1.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/host/sdhci-of-k1.c b/drivers/mmc/host/sdhci-of-k1.c
index 37b0911e7cf2..e6ab40c9a555 100644
--- a/drivers/mmc/host/sdhci-of-k1.c
+++ b/drivers/mmc/host/sdhci-of-k1.c
@@ -438,6 +438,8 @@ static inline int spacemit_sdhci_get_clocks(struct device *dev,
 					    struct sdhci_pltfm_host *pltfm_host)
 {
 	struct spacemit_sdhci_host *sdhst = sdhci_pltfm_priv(pltfm_host);
+	struct device_node *np = dev->of_node;
+	u32 freq;
 
 	sdhst->clk_core = devm_clk_get_enabled(dev, "core");
 	if (IS_ERR(sdhst->clk_core))
@@ -447,6 +449,9 @@ static inline int spacemit_sdhci_get_clocks(struct device *dev,
 	if (IS_ERR(sdhst->clk_io))
 		return -EINVAL;
 
+	if (!of_property_read_u32(np, "clock-frequency", &freq))
+		clk_set_rate(sdhst->clk_io, freq);
+
 	pltfm_host->clk = sdhst->clk_io;
 
 	return 0;

-- 
2.55.0