clk: renesas: Allow reconfiguring SDHI clock on Gen3

The SDHI clock must be configured differently for HS200/HS400/SDR104
modes. Add support for reconfiguring the SDHI clock settings into the
clock driver.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

diff --git a/drivers/clk/renesas/clk-rcar-gen3.c b/drivers/clk/renesas/clk-rcar-gen3.c
index 99698b1..0529fc8 100644 (file)
--- a/drivers/clk/renesas/clk-rcar-gen3.c
+++ b/drivers/clk/renesas/clk-rcar-gen3.c
@@ -107,7 +107,7 @@ static int gen3_clk_get_parent(struct gen3_clk_priv *priv, struct clk *clk,
        return renesas_clk_get_parent(clk, info, parent);
 }
 
-static int gen3_clk_setup_sdif_div(struct clk *clk)
+static int gen3_clk_setup_sdif_div(struct clk *clk, ulong rate)
 {
        struct gen3_clk_priv *priv = dev_get_priv(clk->dev);
        struct cpg_mssr_info *info = priv->info;
@@ -133,7 +133,7 @@ static int gen3_clk_setup_sdif_div(struct clk *clk)
 
        debug("%s[%i] SDIF offset=%x\n", __func__, __LINE__, core->offset);
 
-       writel(1, priv->base + core->offset);
+       writel((rate == 400000000) ? 0x4 : 0x1, priv->base + core->offset);
 
        return 0;
 }
@@ -141,10 +141,6 @@ static int gen3_clk_setup_sdif_div(struct clk *clk)
 static int gen3_clk_enable(struct clk *clk)
 {
        struct gen3_clk_priv *priv = dev_get_priv(clk->dev);
-       int ret = gen3_clk_setup_sdif_div(clk);
-
-       if (ret)
-               return ret;
 
        return renesas_clk_endisable(clk, priv->base, true);
 }
@@ -328,7 +324,7 @@ static ulong gen3_clk_get_rate(struct clk *clk)
 static ulong gen3_clk_set_rate(struct clk *clk, ulong rate)
 {
        /* Force correct SD-IF divider configuration if applicable */
-       gen3_clk_setup_sdif_div(clk);
+       gen3_clk_setup_sdif_div(clk, rate);
        return gen3_clk_get_rate64(clk);
 }