clk: stm32mp1: add debug information

Add support of clk dump command and
display information during probe (under CONFIG_DISPLAY_CPUINFO).

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

2 files changed, 80 insertions, 4 deletions

diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index 304688e56f..d20b2ab350 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -19,6 +19,7 @@ CONFIG_SYS_PROMPT="STM32MP> "
 # CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_MEMINFO=y
 CONFIG_CMD_ADC=y
+CONFIG_CMD_CLK=y
 CONFIG_CMD_FUSE=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_GPT=y
diff --git a/drivers/clk/clk_stm32mp1.c b/drivers/clk/clk_stm32mp1.c
index 916f9f9e8c..09227cf8db 100644
--- a/drivers/clk/clk_stm32mp1.c
+++ b/drivers/clk/clk_stm32mp1.c
@@ -666,8 +666,8 @@ static const u8 stm32mp1_axi_div[8] = {
 	1, 2, 3, 4, 4, 4, 4, 4
 };
 
-#ifdef DEBUG
-static const char * const stm32mp1_clk_parent_name[_PARENT_NB] = {
+static const __maybe_unused
+char * const stm32mp1_clk_parent_name[_PARENT_NB] = {
 	[_HSI] = "HSI",
 	[_HSE] = "HSE",
 	[_CSI] = "CSI",
@@ -705,7 +705,8 @@ static const char * const stm32mp1_clk_parent_name[_PARENT_NB] = {
 	[_DSI_PHY] = "DSI_PHY_PLL",
 };
 
-static const char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = {
+static const __maybe_unused
+char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = {
 	[_I2C12_SEL] = "I2C12",
 	[_I2C35_SEL] = "I2C35",
 	[_I2C46_SEL] = "I2C46",
@@ -724,7 +725,6 @@ static const char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = {
 	[_DSI_SEL] = "DSI",
 	[_ADC12_SEL] = "ADC12",
 };
-#endif
 
 static const struct stm32mp1_clk_data stm32mp1_data = {
 	.gate = stm32mp1_clk_gate,
@@ -1870,6 +1870,54 @@ static void stm32mp1_osc_init(struct udevice *dev)
 	}
 }
 
+static void  __maybe_unused stm32mp1_clk_dump(struct stm32mp1_clk_priv *priv)
+{
+	char buf[32];
+	int i, s, p;
+
+	printf("Clocks:\n");
+	for (i = 0; i < _PARENT_NB; i++) {
+		printf("- %s : %s MHz\n",
+		       stm32mp1_clk_parent_name[i],
+		       strmhz(buf, stm32mp1_clk_get(priv, i)));
+	}
+	printf("Source Clocks:\n");
+	for (i = 0; i < _PARENT_SEL_NB; i++) {
+		p = (readl(priv->base + priv->data->sel[i].offset) >>
+		     priv->data->sel[i].src) & priv->data->sel[i].msk;
+		if (p < priv->data->sel[i].nb_parent) {
+			s = priv->data->sel[i].parent[p];
+			printf("- %s(%d) => parent %s(%d)\n",
+			       stm32mp1_clk_parent_sel_name[i], i,
+			       stm32mp1_clk_parent_name[s], s);
+		} else {
+			printf("- %s(%d) => parent index %d is invalid\n",
+			       stm32mp1_clk_parent_sel_name[i], i, p);
+		}
+	}
+}
+
+#ifdef CONFIG_CMD_CLK
+int soc_clk_dump(void)
+{
+	struct udevice *dev;
+	struct stm32mp1_clk_priv *priv;
+	int ret;
+
+	ret = uclass_get_device_by_driver(UCLASS_CLK,
+					  DM_GET_DRIVER(stm32mp1_clock),
+					  &dev);
+	if (ret)
+		return ret;
+
+	priv = dev_get_priv(dev);
+
+	stm32mp1_clk_dump(priv);
+
+	return 0;
+}
+#endif
+
 static int stm32mp1_clk_probe(struct udevice *dev)
 {
 	int result = 0;
@@ -1893,6 +1941,33 @@ static int stm32mp1_clk_probe(struct udevice *dev)
 		result = stm32mp1_clktree(dev);
 #endif
 
+#ifndef CONFIG_SPL_BUILD
+#if defined(DEBUG)
+	/* display debug information for probe after relocation */
+	if (gd->flags & GD_FLG_RELOC)
+		stm32mp1_clk_dump(priv);
+#endif
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+	if (gd->flags & GD_FLG_RELOC) {
+		char buf[32];
+
+		printf("Clocks:\n");
+		printf("- MPU : %s MHz\n",
+		       strmhz(buf, stm32mp1_clk_get(priv, _CK_MPU)));
+		printf("- MCU : %s MHz\n",
+		       strmhz(buf, stm32mp1_clk_get(priv, _CK_MCU)));
+		printf("- AXI : %s MHz\n",
+		       strmhz(buf, stm32mp1_clk_get(priv, _ACLK)));
+		printf("- PER : %s MHz\n",
+		       strmhz(buf, stm32mp1_clk_get(priv, _CK_PER)));
+		/* DDRPHYC father */
+		printf("- DDR : %s MHz\n",
+		       strmhz(buf, stm32mp1_clk_get(priv, _PLL2_R)));
+	}
+#endif /* CONFIG_DISPLAY_CPUINFO */
+#endif
+
 	return result;
 }