[U-Boot] [PATCH v4 3/9] sunxi: clk: A80: add MMC clock support

[Andre Przywara]

The A80 handles resets and clock gates for the MMC devices differently,
outside of the CCU IP block. Consequently we have a separate clock
device with a separate binding for that.

Implement that with the respective clock gates and resets to allow the
A80 taking part in the DM_MMC game.

Signed-off-by: Andre Przywara <andre.przywara at arm.com>
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 drivers/clk/sunxi/clk_a80.c | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/sunxi/clk_a80.c b/drivers/clk/sunxi/clk_a80.c
index d4bfb0a98b..aec1d80c46 100644
--- a/drivers/clk/sunxi/clk_a80.c
+++ b/drivers/clk/sunxi/clk_a80.c
@@ -34,19 +34,45 @@ static const struct ccu_reset a80_resets[] = {
 	[RST_BUS_UART5]		= RESET(0x5b4, BIT(21)),
 };
 
+static const struct ccu_clk_gate a80_mmc_gates[] = {
+	[0]			= GATE(0x0, BIT(16)),
+	[1]			= GATE(0x4, BIT(16)),
+	[2]			= GATE(0x8, BIT(16)),
+	[3]			= GATE(0xc, BIT(16)),
+};
+
+static const struct ccu_reset a80_mmc_resets[] = {
+	[0]			= GATE(0x0, BIT(18)),
+	[1]			= GATE(0x4, BIT(18)),
+	[2]			= GATE(0x8, BIT(18)),
+	[3]			= GATE(0xc, BIT(18)),
+};
+
 static const struct ccu_desc a80_ccu_desc = {
 	.gates = a80_gates,
 	.resets = a80_resets,
 };
 
+static const struct ccu_desc a80_mmc_clk_desc = {
+	.gates = a80_mmc_gates,
+	.resets = a80_mmc_resets,
+};
+
 static int a80_clk_bind(struct udevice *dev)
 {
-	return sunxi_reset_bind(dev, ARRAY_SIZE(a80_resets));
+	ulong count = ARRAY_SIZE(a80_resets);
+
+	if (device_is_compatible(dev, "allwinner,sun9i-a80-mmc-config-clk"))
+		count = ARRAY_SIZE(a80_mmc_resets);
+
+	return sunxi_reset_bind(dev, count);
 }
 
 static const struct udevice_id a80_ccu_ids[] = {
 	{ .compatible = "allwinner,sun9i-a80-ccu",
 	  .data = (ulong)&a80_ccu_desc },
+	{ .compatible = "allwinner,sun9i-a80-mmc-config-clk",
+	  .data = (ulong)&a80_mmc_clk_desc },
 	{ }
 };
 
-- 
2.17.1