[U-Boot] [PATCH 3/9] stm32mp1: ram: change ddr speed to kHz

[Patrick Delaunay]

Allow fractional support in DDR tools.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 arch/arm/dts/stm32mp15-ddr3-1x4Gb-1066-binG.dtsi           |  2 +-
 arch/arm/dts/stm32mp15-ddr3-2x4Gb-1066-binG.dtsi           |  2 +-
 .../memory-controllers/st,stm32mp1-ddr.txt                 |  4 ++--
 drivers/ram/stm32mp1/stm32mp1_ddr.c                        |  4 ++--
 drivers/ram/stm32mp1/stm32mp1_ddr.h                        |  4 ++--
 drivers/ram/stm32mp1/stm32mp1_ram.c                        | 14 +++++++-------
 6 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/arch/arm/dts/stm32mp15-ddr3-1x4Gb-1066-binG.dtsi b/arch/arm/dts/stm32mp15-ddr3-1x4Gb-1066-binG.dtsi
index 7d9b95c..b86a1c0 100644
--- a/arch/arm/dts/stm32mp15-ddr3-1x4Gb-1066-binG.dtsi
+++ b/arch/arm/dts/stm32mp15-ddr3-1x4Gb-1066-binG.dtsi
@@ -17,7 +17,7 @@
  * Tc > + 85C : N
  */
 #define DDR_MEM_NAME "DDR3-1066/888 bin G 1x4Gb 533MHz v1.43"
-#define DDR_MEM_SPEED 533
+#define DDR_MEM_SPEED 533000
 #define DDR_MEM_SIZE 0x20000000
 
 #define DDR_MSTR 0x00041401
diff --git a/arch/arm/dts/stm32mp15-ddr3-2x4Gb-1066-binG.dtsi b/arch/arm/dts/stm32mp15-ddr3-2x4Gb-1066-binG.dtsi
index 8a5a821..99e5200 100644
--- a/arch/arm/dts/stm32mp15-ddr3-2x4Gb-1066-binG.dtsi
+++ b/arch/arm/dts/stm32mp15-ddr3-2x4Gb-1066-binG.dtsi
@@ -18,7 +18,7 @@
  */
 
 #define DDR_MEM_NAME "DDR3-1066 bin G 2x4Gb 533MHz v1.36"
-#define DDR_MEM_SPEED 533
+#define DDR_MEM_SPEED 533000
 #define DDR_MEM_SIZE 0x40000000
 
 #define DDR_MSTR 0x00040401
diff --git a/doc/device-tree-bindings/memory-controllers/st,stm32mp1-ddr.txt b/doc/device-tree-bindings/memory-controllers/st,stm32mp1-ddr.txt
index 3028636..e5b1bb5 100644
--- a/doc/device-tree-bindings/memory-controllers/st,stm32mp1-ddr.txt
+++ b/doc/device-tree-bindings/memory-controllers/st,stm32mp1-ddr.txt
@@ -16,7 +16,7 @@ included in STM32 Cube tool
 info attributes:
 ----------------
 - st,mem-name	: name for DDR configuration, simple string for information
-- st,mem-speed	: DDR expected speed for the setting in MHz
+- st,mem-speed	: DDR expected speed for the setting in kHz
 - st,mem-size	: DDR mem size in byte
 
 
@@ -173,7 +173,7 @@ Example:
 				      "ddrphycapb";
 
 			st,mem-name = "DDR3 2x4Gb 533MHz";
-			st,mem-speed = <533>;
+			st,mem-speed = <533000>;
 			st,mem-size = <0x40000000>;
 
 			st,ctl-reg = <
diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr.c b/drivers/ram/stm32mp1/stm32mp1_ddr.c
index 8200366..1c40a32 100644
--- a/drivers/ram/stm32mp1/stm32mp1_ddr.c
+++ b/drivers/ram/stm32mp1/stm32mp1_ddr.c
@@ -373,7 +373,7 @@ void stm32mp1_ddr_init(struct ddr_info *priv,
 		panic("ddr power init failed\n");
 
 	debug("name = %s\n", config->info.name);
-	debug("speed = %d MHz\n", config->info.speed);
+	debug("speed = %d kHz\n", config->info.speed);
 	debug("size  = 0x%x\n", config->info.size);
 /*
  * 1. Program the DWC_ddr_umctl2 registers
@@ -389,7 +389,7 @@ void stm32mp1_ddr_init(struct ddr_info *priv,
 
 /* 1.2. start CLOCK */
 	if (stm32mp1_ddr_clk_enable(priv, config->info.speed))
-		panic("invalid DRAM clock : %d MHz\n",
+		panic("invalid DRAM clock : %d kHz\n",
 		      config->info.speed);
 
 /* 1.3. deassert reset */
diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr.h b/drivers/ram/stm32mp1/stm32mp1_ddr.h
index 3cd0161..a8eed89 100644
--- a/drivers/ram/stm32mp1/stm32mp1_ddr.h
+++ b/drivers/ram/stm32mp1/stm32mp1_ddr.h
@@ -157,7 +157,7 @@ struct stm32mp1_ddrphy_cal {
 
 struct stm32mp1_ddr_info {
 	const char *name;
-	u16 speed; /* in MHZ */
+	u32 speed; /* in kHZ */
 	u32 size;  /* memory size in byte = col * row * width */
 };
 
@@ -172,7 +172,7 @@ struct stm32mp1_ddr_config {
 	struct stm32mp1_ddrphy_cal p_cal;
 };
 
-int stm32mp1_ddr_clk_enable(struct ddr_info *priv, u16 mem_speed);
+int stm32mp1_ddr_clk_enable(struct ddr_info *priv, u32 mem_speed);
 void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir);
 void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl);
 void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
diff --git a/drivers/ram/stm32mp1/stm32mp1_ram.c b/drivers/ram/stm32mp1/stm32mp1_ram.c
index e45a3b2..d04c6aa 100644
--- a/drivers/ram/stm32mp1/stm32mp1_ram.c
+++ b/drivers/ram/stm32mp1/stm32mp1_ram.c
@@ -20,7 +20,7 @@ static const char *const clkname[] = {
 	"ddrphyc" /* LAST clock => used for get_rate() */
 };
 
-int stm32mp1_ddr_clk_enable(struct ddr_info *priv, uint16_t mem_speed)
+int stm32mp1_ddr_clk_enable(struct ddr_info *priv, uint32_t mem_speed)
 {
 	unsigned long ddrphy_clk;
 	unsigned long ddr_clk;
@@ -43,13 +43,13 @@ int stm32mp1_ddr_clk_enable(struct ddr_info *priv, uint16_t mem_speed)
 	priv->clk = clk;
 	ddrphy_clk = clk_get_rate(&priv->clk);
 
-	debug("DDR: mem_speed (%d MHz), RCC %d MHz\n",
-	      mem_speed, (u32)(ddrphy_clk / 1000 / 1000));
+	debug("DDR: mem_speed (%d kHz), RCC %d kHz\n",
+	      mem_speed, (u32)(ddrphy_clk / 1000));
 	/* max 10% frequency delta */
-	ddr_clk = abs(ddrphy_clk - mem_speed * 1000 * 1000);
-	if (ddr_clk > (mem_speed * 1000 * 100)) {
-		pr_err("DDR expected freq %d MHz, current is %d MHz\n",
-		       mem_speed, (u32)(ddrphy_clk / 1000 / 1000));
+	ddr_clk = abs(ddrphy_clk - mem_speed * 1000);
+	if (ddr_clk > (mem_speed * 100)) {
+		pr_err("DDR expected freq %d kHz, current is %d kHz\n",
+		       mem_speed, (u32)(ddrphy_clk / 1000));
 		return -EINVAL;
 	}
 
-- 
2.7.4