[U-Boot] [PATCH v2] mmc: sunxi: Fix mmc clocks for DM_MMC

[Jagan Teki]

Existing clock configure code has been followed based on the
legacy MMC dt node definitions and it cannot work with recent
dts(i) sync from Linux.

So, add clock configure code for Allwinner platforms which support
DM_MMC and eventually this will drop once CLK support is in Mainline.

Fixes: 3c92cca3cda0 ("ARM: dts: sun4i: Update A10 dts(i) files from Linux-v4.18-rc3")
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
Changes for v2:
- Use u16 for gate and mclk offset, since future support for H6

 drivers/mmc/sunxi_mmc.c | 50 ++++++++++++++++++++++++++++++-----------
 1 file changed, 37 insertions(+), 13 deletions(-)

diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index 9bf040cb40..302332bf97 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -19,6 +19,13 @@
 #include <asm/arch/mmc.h>
 #include <asm-generic/gpio.h>
 
+#ifdef CONFIG_DM_MMC
+struct sunxi_mmc_variant {
+	u16 gate_offset;
+	u16 mclk_offset;
+};
+#endif
+
 struct sunxi_mmc_plat {
 	struct mmc_config cfg;
 	struct mmc mmc;
@@ -32,6 +39,9 @@ struct sunxi_mmc_priv {
 	int cd_inverted;		/* Inverted Card Detect */
 	struct sunxi_mmc *reg;
 	struct mmc_config cfg;
+#ifdef CONFIG_DM_MMC
+	const struct sunxi_mmc_variant *variant;
+#endif
 };
 
 #if !CONFIG_IS_ENABLED(DM_MMC)
@@ -599,7 +609,7 @@ static int sunxi_mmc_probe(struct udevice *dev)
 	struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 	struct mmc_config *cfg = &plat->cfg;
 	struct ofnode_phandle_args args;
-	u32 *gate_reg;
+	u32 *gate_reg, *ccu_reg;
 	int bus_width, ret;
 
 	cfg->name = dev->name;
@@ -618,21 +628,21 @@ static int sunxi_mmc_probe(struct udevice *dev)
 	cfg->f_max = 52000000;
 
 	priv->reg = (void *)dev_read_addr(dev);
+	priv->variant =
+		(const struct sunxi_mmc_variant *)dev_get_driver_data(dev);
 
 	/* We don't have a sunxi clock driver so find the clock address here */
 	ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
 					  1, &args);
 	if (ret)
 		return ret;
-	priv->mclkreg = (u32 *)ofnode_get_addr(args.node);
+	ccu_reg = (u32 *)ofnode_get_addr(args.node);
 
-	ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
-					  0, &args);
-	if (ret)
-		return ret;
-	gate_reg = (u32 *)ofnode_get_addr(args.node);
-	setbits_le32(gate_reg, 1 << args.args[0]);
-	priv->mmc_no = args.args[0] - 8;
+	priv->mmc_no = ((uintptr_t)priv->reg - SUNXI_MMC0_BASE) / 0x1000;
+	priv->mclkreg = (void *)ccu_reg +
+			(priv->variant->mclk_offset + (priv->mmc_no * 4));
+	gate_reg = (void *)ccu_reg + priv->variant->gate_offset;
+	setbits_le32(gate_reg, BIT(AHB_GATE_OFFSET_MMC(priv->mmc_no)));
 
 	ret = mmc_set_mod_clk(priv, 24000000);
 	if (ret)
@@ -665,11 +675,25 @@ static int sunxi_mmc_bind(struct udevice *dev)
 	return mmc_bind(dev, &plat->mmc, &plat->cfg);
 }
 
+static const struct sunxi_mmc_variant sun4i_a10_variant = {
+	.gate_offset = 0x60,
+	.mclk_offset = 0x88,
+};
+
 static const struct udevice_id sunxi_mmc_ids[] = {
-	{ .compatible = "allwinner,sun4i-a10-mmc" },
-	{ .compatible = "allwinner,sun5i-a13-mmc" },
-	{ .compatible = "allwinner,sun7i-a20-mmc" },
-	{ }
+	{
+	  .compatible = "allwinner,sun4i-a10-mmc",
+	  .data = (ulong)&sun4i_a10_variant,
+	},
+	{
+	  .compatible = "allwinner,sun5i-a13-mmc",
+	  .data = (ulong)&sun4i_a10_variant,
+	},
+	{
+	  .compatible = "allwinner,sun7i-a20-mmc",
+	  .data = (ulong)&sun4i_a10_variant,
+	},
+	{ /* sentinel */ }
 };
 
 U_BOOT_DRIVER(sunxi_mmc_drv) = {
-- 
2.18.0.321.gffc6fa0e3