[PATCH v2 1/2] clk: imx: imx6ul: Move csi_sel mux to correct base register

Subsystems: common clk framework, nxp i.mx clock drivers, the rest

STALE1847d LANDED

Landed in mainline as 2f9d61869640 on 2021-10-01.

4 messages, 2 authors, 2021-09-28 · open the first message on its own page

[PATCH v2 1/2] clk: imx: imx6ul: Move csi_sel mux to correct base register

From: Stefan Riedmueller <hidden>
Date: 2021-09-27 07:29:01

The csi_sel mux register is located in the CCM register base and not the
CCM_ANALOG register base. So move it to the correct position in code.

Otherwise changing the parent of the csi clock can lead to a complete
system failure due to the CCM_ANALOG_PLL_SYS_TOG register being falsely
modified.

Also remove the SET_RATE_PARENT flag since one possible supply for the
csi_sel mux is the system PLL which we don't want to modify.

Signed-off-by: Stefan Riedmueller <redacted>
---
No changes in v2.
---
 drivers/clk/imx/clk-imx6ul.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c
index 5dbb6a937732..206e4c43f68f 100644
--- a/drivers/clk/imx/clk-imx6ul.c
+++ b/drivers/clk/imx/clk-imx6ul.c

@@ -161,7 +161,6 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 	hws[IMX6UL_PLL5_BYPASS] = imx_clk_hw_mux_flags("pll5_bypass", base + 0xa0, 16, 1, pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_PLL6_BYPASS] = imx_clk_hw_mux_flags("pll6_bypass", base + 0xe0, 16, 1, pll6_bypass_sels, ARRAY_SIZE(pll6_bypass_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_PLL7_BYPASS] = imx_clk_hw_mux_flags("pll7_bypass", base + 0x20, 16, 1, pll7_bypass_sels, ARRAY_SIZE(pll7_bypass_sels), CLK_SET_RATE_PARENT);
-	hws[IMX6UL_CLK_CSI_SEL] = imx_clk_hw_mux_flags("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels), CLK_SET_RATE_PARENT);
 
 	/* Do not bypass PLLs initially */
 	clk_set_parent(hws[IMX6UL_PLL1_BYPASS]->clk, hws[IMX6UL_CLK_PLL1]->clk);

@@ -270,6 +269,7 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 	hws[IMX6UL_CLK_ECSPI_SEL]	  = imx_clk_hw_mux("ecspi_sel",	base + 0x38, 18, 1, ecspi_sels, ARRAY_SIZE(ecspi_sels));
 	hws[IMX6UL_CLK_LCDIF_PRE_SEL]	  = imx_clk_hw_mux_flags("lcdif_pre_sel", base + 0x38, 15, 3, lcdif_pre_sels, ARRAY_SIZE(lcdif_pre_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_CLK_LCDIF_SEL]	  = imx_clk_hw_mux("lcdif_sel",	base + 0x38, 9, 3, lcdif_sels, ARRAY_SIZE(lcdif_sels));
+	hws[IMX6UL_CLK_CSI_SEL]		  = imx_clk_hw_mux("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels));
 
 	hws[IMX6UL_CLK_LDB_DI0_DIV_SEL]  = imx_clk_hw_mux("ldb_di0", base + 0x20, 10, 1, ldb_di0_div_sels, ARRAY_SIZE(ldb_di0_div_sels));
 	hws[IMX6UL_CLK_LDB_DI1_DIV_SEL]  = imx_clk_hw_mux("ldb_di1", base + 0x20, 11, 1, ldb_di1_div_sels, ARRAY_SIZE(ldb_di1_div_sels));

-- 
2.25.1


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[PATCH v2 2/2] clk: imx: imx6ul: Fix csi clk gate register

From: Stefan Riedmueller <hidden>
Date: 2021-09-27 07:29:03

According to the imx6ul Reference Manual the csi clk gate register is
CCM_CCGR3 (offset 0x74) bit 0/1. For the imx6ull on the other hand the
Reference Manual lists register CCM_CCGR2 (offset 0x70) bit 2/3 as the
csi clk gate which is the current setting.

Tests have shown though that the correct csi clk gate register for the
imx6ull is actually CCM_CCGR3 bit 0/1 as well. Thus set the correct
register for both platforms.

Signed-off-by: Stefan Riedmueller <redacted>
Tested-by: Fabio Estevam <festevam@gmail.com>
---
Changes in v2:
 - Added comment about ref manual mismatch
 - Added Tested-by from Fabio
---
 drivers/clk/imx/clk-imx6ul.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c
index 206e4c43f68f..520b100bff4b 100644
--- a/drivers/clk/imx/clk-imx6ul.c
+++ b/drivers/clk/imx/clk-imx6ul.c

@@ -380,7 +380,6 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 		hws[IMX6ULL_CLK_ESAI_IPG]	= imx_clk_hw_gate2_shared("esai_ipg",	"ahb",		base + 0x70,	0, &share_count_esai);
 		hws[IMX6ULL_CLK_ESAI_MEM]	= imx_clk_hw_gate2_shared("esai_mem",	"ahb",		base + 0x70,	0, &share_count_esai);
 	}
-	hws[IMX6UL_CLK_CSI]		= imx_clk_hw_gate2("csi",		"csi_podf",		base + 0x70,	2);
 	hws[IMX6UL_CLK_I2C1]		= imx_clk_hw_gate2("i2c1",		"perclk",	base + 0x70,	6);
 	hws[IMX6UL_CLK_I2C2]		= imx_clk_hw_gate2("i2c2",		"perclk",	base + 0x70,	8);
 	hws[IMX6UL_CLK_I2C3]		= imx_clk_hw_gate2("i2c3",		"perclk",	base + 0x70,	10);

@@ -391,6 +390,12 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 	hws[IMX6UL_CLK_PXP]		= imx_clk_hw_gate2("pxp",		"axi",		base + 0x70,	30);
 
 	/* CCGR3 */
+	/*
+	 * Although the imx6ull reference manual lists CCGR2 as the csi clk
+	 * gate register, tests have shown that it is actually the CCGR3
+	 * register bit 0/1, same as for the imx6ul.
+	 */
+	hws[IMX6UL_CLK_CSI]		= imx_clk_hw_gate2("csi",	"csi_podf",	base + 0x74,	0);
 	hws[IMX6UL_CLK_UART5_IPG]	= imx_clk_hw_gate2("uart5_ipg",	"ipg",		base + 0x74,	2);
 	hws[IMX6UL_CLK_UART5_SERIAL]	= imx_clk_hw_gate2("uart5_serial",	"uart_podf",	base + 0x74,	2);
 	if (clk_on_imx6ul()) {

-- 
2.25.1


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Re: [PATCH v2 1/2] clk: imx: imx6ul: Move csi_sel mux to correct base register

From: Abel Vesa <hidden>
Date: 2021-09-27 08:34:40

On 21-09-27 09:28:56, Stefan Riedmueller wrote:

The csi_sel mux register is located in the CCM register base and not the
CCM_ANALOG register base. So move it to the correct position in code.

Otherwise changing the parent of the csi clock can lead to a complete
system failure due to the CCM_ANALOG_PLL_SYS_TOG register being falsely
modified.

Also remove the SET_RATE_PARENT flag since one possible supply for the
csi_sel mux is the system PLL which we don't want to modify.

Signed-off-by: Stefan Riedmueller <redacted>

For both patches:

Reviewed-by: Abel Vesa <redacted>

quoted hunk

---
No changes in v2.
---
 drivers/clk/imx/clk-imx6ul.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c
index 5dbb6a937732..206e4c43f68f 100644
--- a/drivers/clk/imx/clk-imx6ul.c
+++ b/drivers/clk/imx/clk-imx6ul.c

@@ -161,7 +161,6 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 	hws[IMX6UL_PLL5_BYPASS] = imx_clk_hw_mux_flags("pll5_bypass", base + 0xa0, 16, 1, pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_PLL6_BYPASS] = imx_clk_hw_mux_flags("pll6_bypass", base + 0xe0, 16, 1, pll6_bypass_sels, ARRAY_SIZE(pll6_bypass_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_PLL7_BYPASS] = imx_clk_hw_mux_flags("pll7_bypass", base + 0x20, 16, 1, pll7_bypass_sels, ARRAY_SIZE(pll7_bypass_sels), CLK_SET_RATE_PARENT);
-	hws[IMX6UL_CLK_CSI_SEL] = imx_clk_hw_mux_flags("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels), CLK_SET_RATE_PARENT);
 
 	/* Do not bypass PLLs initially */
 	clk_set_parent(hws[IMX6UL_PLL1_BYPASS]->clk, hws[IMX6UL_CLK_PLL1]->clk);

@@ -270,6 +269,7 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 	hws[IMX6UL_CLK_ECSPI_SEL]	  = imx_clk_hw_mux("ecspi_sel",	base + 0x38, 18, 1, ecspi_sels, ARRAY_SIZE(ecspi_sels));
 	hws[IMX6UL_CLK_LCDIF_PRE_SEL]	  = imx_clk_hw_mux_flags("lcdif_pre_sel", base + 0x38, 15, 3, lcdif_pre_sels, ARRAY_SIZE(lcdif_pre_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_CLK_LCDIF_SEL]	  = imx_clk_hw_mux("lcdif_sel",	base + 0x38, 9, 3, lcdif_sels, ARRAY_SIZE(lcdif_sels));
+	hws[IMX6UL_CLK_CSI_SEL]		  = imx_clk_hw_mux("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels));
 
 	hws[IMX6UL_CLK_LDB_DI0_DIV_SEL]  = imx_clk_hw_mux("ldb_di0", base + 0x20, 10, 1, ldb_di0_div_sels, ARRAY_SIZE(ldb_di0_div_sels));
 	hws[IMX6UL_CLK_LDB_DI1_DIV_SEL]  = imx_clk_hw_mux("ldb_di1", base + 0x20, 11, 1, ldb_di1_div_sels, ARRAY_SIZE(ldb_di1_div_sels));

-- 
2.25.1

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Re: [PATCH v2 1/2] clk: imx: imx6ul: Move csi_sel mux to correct base register

From: Abel Vesa <hidden>
Date: 2021-09-28 09:11:45

On 21-09-27 09:28:56, Stefan Riedmueller wrote:

The csi_sel mux register is located in the CCM register base and not the
CCM_ANALOG register base. So move it to the correct position in code.

Otherwise changing the parent of the csi clock can lead to a complete
system failure due to the CCM_ANALOG_PLL_SYS_TOG register being falsely
modified.

Also remove the SET_RATE_PARENT flag since one possible supply for the
csi_sel mux is the system PLL which we don't want to modify.

Signed-off-by: Stefan Riedmueller <redacted>

Applied both. Thanks.

quoted hunk

---
No changes in v2.
---
 drivers/clk/imx/clk-imx6ul.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c
index 5dbb6a937732..206e4c43f68f 100644
--- a/drivers/clk/imx/clk-imx6ul.c
+++ b/drivers/clk/imx/clk-imx6ul.c

@@ -161,7 +161,6 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 	hws[IMX6UL_PLL5_BYPASS] = imx_clk_hw_mux_flags("pll5_bypass", base + 0xa0, 16, 1, pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_PLL6_BYPASS] = imx_clk_hw_mux_flags("pll6_bypass", base + 0xe0, 16, 1, pll6_bypass_sels, ARRAY_SIZE(pll6_bypass_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_PLL7_BYPASS] = imx_clk_hw_mux_flags("pll7_bypass", base + 0x20, 16, 1, pll7_bypass_sels, ARRAY_SIZE(pll7_bypass_sels), CLK_SET_RATE_PARENT);
-	hws[IMX6UL_CLK_CSI_SEL] = imx_clk_hw_mux_flags("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels), CLK_SET_RATE_PARENT);
 
 	/* Do not bypass PLLs initially */
 	clk_set_parent(hws[IMX6UL_PLL1_BYPASS]->clk, hws[IMX6UL_CLK_PLL1]->clk);

@@ -270,6 +269,7 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node)
 	hws[IMX6UL_CLK_ECSPI_SEL]	  = imx_clk_hw_mux("ecspi_sel",	base + 0x38, 18, 1, ecspi_sels, ARRAY_SIZE(ecspi_sels));
 	hws[IMX6UL_CLK_LCDIF_PRE_SEL]	  = imx_clk_hw_mux_flags("lcdif_pre_sel", base + 0x38, 15, 3, lcdif_pre_sels, ARRAY_SIZE(lcdif_pre_sels), CLK_SET_RATE_PARENT);
 	hws[IMX6UL_CLK_LCDIF_SEL]	  = imx_clk_hw_mux("lcdif_sel",	base + 0x38, 9, 3, lcdif_sels, ARRAY_SIZE(lcdif_sels));
+	hws[IMX6UL_CLK_CSI_SEL]		  = imx_clk_hw_mux("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels));
 
 	hws[IMX6UL_CLK_LDB_DI0_DIV_SEL]  = imx_clk_hw_mux("ldb_di0", base + 0x20, 10, 1, ldb_di0_div_sels, ARRAY_SIZE(ldb_di0_div_sels));
 	hws[IMX6UL_CLK_LDB_DI1_DIV_SEL]  = imx_clk_hw_mux("ldb_di1", base + 0x20, 11, 1, ldb_di1_div_sels, ARRAY_SIZE(ldb_di1_div_sels));

-- 
2.25.1

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