mmc: tmio: Switch to clock framework

Switch the driver to using clk_get_rate()/clk_set_rate() instead of
caching the mclk frequency in it's private data. This is required on
the SDHI variant of the controller, where the upstream mclk need to
be adjusted when using UHS modes.

Platforms which do not support clock framework or do not support it
in eg. SPL default to 100 MHz clock.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
---
V2: - Fix build on certain platforms using SPL without clock framework
V3: - Turn clk_get_rate into a callback and fill it as needed on both
      renesas and socionext platforms

1 files changed, 13 insertions, 8 deletions

diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c
index e7f96f8bf22..f4283d055fd 100644
--- a/drivers/mmc/renesas-sdhi.c
+++ b/drivers/mmc/renesas-sdhi.c
@@ -358,15 +358,21 @@ static const struct udevice_id renesas_sdhi_match[] = {
 	{ /* sentinel */ }
 };
 
+static ulong renesas_sdhi_clk_get_rate(struct tmio_sd_priv *priv)
+{
+	return clk_get_rate(&priv->clk);
+}
+
 static int renesas_sdhi_probe(struct udevice *dev)
 {
 	struct tmio_sd_priv *priv = dev_get_priv(dev);
 	u32 quirks = dev_get_driver_data(dev);
 	struct fdt_resource reg_res;
-	struct clk clk;
 	DECLARE_GLOBAL_DATA_PTR;
 	int ret;
 
+	priv->clk_get_rate = renesas_sdhi_clk_get_rate;
+
 	if (quirks == RENESAS_GEN2_QUIRKS) {
 		ret = fdt_get_resource(gd->fdt_blob, dev_of_offset(dev),
 				       "reg", 0, &reg_res);
@@ -380,22 +386,21 @@ static int renesas_sdhi_probe(struct udevice *dev)
 			quirks |= TMIO_SD_CAP_16BIT;
 	}
 
-	ret = clk_get_by_index(dev, 0, &clk);
+	ret = clk_get_by_index(dev, 0, &priv->clk);
 	if (ret < 0) {
 		dev_err(dev, "failed to get host clock\n");
 		return ret;
 	}
 
 	/* set to max rate */
-	priv->mclk = clk_set_rate(&clk, ULONG_MAX);
-	if (IS_ERR_VALUE(priv->mclk)) {
+	ret = clk_set_rate(&priv->clk, 200000000);
+	if (ret < 0) {
 		dev_err(dev, "failed to set rate for host clock\n");
-		clk_free(&clk);
-		return priv->mclk;
+		clk_free(&priv->clk);
+		return ret;
 	}
 
-	ret = clk_enable(&clk);
-	clk_free(&clk);
+	ret = clk_enable(&priv->clk);
 	if (ret) {
 		dev_err(dev, "failed to enable host clock\n");
 		return ret;