[U-Boot] [PATCH v4 06/18] stm32f7: use clock driver to enable sdram controller clock

[Vikas Manocha]

This patch also removes the sdram/fmc clock enable from board specific
code.

Signed-off-by: Vikas Manocha <vikas.manocha at st.com>
cc: Christophe KERELLO <christophe.kerello at st.com>
---
Changed in v4: None
Changed in v3: None
Changed in v2: None

 arch/arm/dts/stm32f746.dtsi                |  1 +
 board/st/stm32f746-disco/stm32f746-disco.c |  2 --
 drivers/ram/stm32_sdram.c                  | 15 +++++++++++++++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/arch/arm/dts/stm32f746.dtsi b/arch/arm/dts/stm32f746.dtsi
index 3707550..e9fd6f4 100644
--- a/arch/arm/dts/stm32f746.dtsi
+++ b/arch/arm/dts/stm32f746.dtsi
@@ -74,6 +74,7 @@
 		fmc: fmc at A0000000 {
 			compatible = "st,stm32-fmc";
 			reg = <0xA0000000 0x1000>;
+			clocks = <&rcc 0 64>;
 			u-boot,dm-pre-reloc;
 		};
 
diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c
index e1113a6..370db15 100644
--- a/board/st/stm32f746-disco/stm32f746-disco.c
+++ b/board/st/stm32f746-disco/stm32f746-disco.c
@@ -51,8 +51,6 @@ int dram_init(void)
 	if (rv)
 		return rv;
 
-	clock_setup(FMC_CLOCK_CFG);
-
 	rv = uclass_get_device(UCLASS_RAM, 0, &dev);
 	if (rv) {
 		debug("DRAM init failed: %d\n", rv);
diff --git a/drivers/ram/stm32_sdram.c b/drivers/ram/stm32_sdram.c
index 67be61f..67d8855 100644
--- a/drivers/ram/stm32_sdram.c
+++ b/drivers/ram/stm32_sdram.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include <ram.h>
 #include <asm/io.h>
@@ -122,6 +123,20 @@ int stm32_sdram_init(void)
 
 static int stm32_fmc_probe(struct udevice *dev)
 {
+#ifdef CONFIG_CLK
+	int ret;
+	struct clk clk;
+	ret = clk_get_by_index(dev, 0, &clk);
+	if (ret < 0)
+		return ret;
+
+	ret = clk_enable(&clk);
+
+	if (ret) {
+		dev_err(dev, "failed to enable clock\n");
+		return ret;
+	}
+#endif
 	stm32_sdram_init();
 	return 0;
 }
-- 
1.9.1