[PATCH 1/4] spi: rockchip_sfc: Support sclk_x2 version

[Jonas Karlman]

From: Jon Lin <jon.lin at rock-chips.com>

SFC after version 8 supports dtr mode, so the IO is the binary output of
the controller clock.

Signed-off-by: Jon Lin <jon.lin at rock-chips.com>
Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 drivers/spi/rockchip_sfc.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/rockchip_sfc.c b/drivers/spi/rockchip_sfc.c
index 73738ab26d33..60e74117057a 100644
--- a/drivers/spi/rockchip_sfc.c
+++ b/drivers/spi/rockchip_sfc.c
@@ -108,6 +108,7 @@
 #define  SFC_VER_3			0x3
 #define  SFC_VER_4			0x4
 #define  SFC_VER_5			0x5
+#define  SFC_VER_8			0x8
 
 /* Delay line controller resiter */
 #define SFC_DLL_CTRL0			0x3C
@@ -589,6 +590,16 @@ static int rockchip_sfc_adjust_op_size(struct spi_slave *mem, struct spi_mem_op
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(CLK)
+static int rockchip_sfc_clk_set_rate(struct rockchip_sfc *sfc, uint speed)
+{
+	if (sfc->version >= SFC_VER_8)
+		return clk_set_rate(&sfc->clk, speed * 2);
+	else
+		return clk_set_rate(&sfc->clk, speed);
+}
+#endif
+
 static int rockchip_sfc_set_speed(struct udevice *bus, uint speed)
 {
 	struct rockchip_sfc *sfc = dev_get_plat(bus);
@@ -600,7 +611,7 @@ static int rockchip_sfc_set_speed(struct udevice *bus, uint speed)
 		return 0;
 
 #if CONFIG_IS_ENABLED(CLK)
-	int ret = clk_set_rate(&sfc->clk, speed);
+	int ret = rockchip_sfc_clk_set_rate(sfc, speed);
 
 	if (ret < 0) {
 		dev_err(sfc->dev, "set_freq=%dHz fail, check if it's the cru support level\n",
-- 
2.49.0