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mx35: Move clock enums to clock.h

PATCH New Benoît Thébaudeau 2 participants 31 messages Aug 14, 2012 – Oct 10, 2012

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#0 lore raw

PATCH 1/7 mx35: Move clock enums to clock.h

---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |    4 +--
 .../arch/arm/include/asm/arch-mx35/clock.h         |   28 +++++++++++++++++++-
 .../arch/arm/include/asm/arch-mx35/imx-regs.h      |   26 ------------------
 3 files changed, 29 insertions(+), 29 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +2 -2
index 986b1f9..dba4903 100644
@@ -205,7 +205,7 @@ u32 imx_get_uartclk(void)
 	return freq;
 }
 
-unsigned int mxc_get_main_clock(enum mxc_main_clocks clk)
+unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 {
 	u32 nfc_pdf, hsp_podf;
 	u32 pll, ret_val = 0, usb_prdf, usb_podf;
@@ -270,7 +270,7 @@ unsigned int mxc_get_main_clock(enum mxc_main_clocks clk)
 
 	return ret_val;
 }
-unsigned int mxc_get_peri_clock(enum mxc_peri_clocks clk)
+unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 {
 	u32 ret_val = 0, pdf, pre_pdf, clk_sel;
 	struct ccm_regs *ccm =
arch/arm/include/asm/arch-mx35/clock.h +27 -1
index 4c0ddfd..5dc53ba 100644
@@ -25,7 +25,7 @@
 #define __ASM_ARCH_CLOCK_H
 
 enum mxc_clock {
-	MXC_ARM_CLK = 0,
+	MXC_ARM_CLK,
 	MXC_AHB_CLK,
 	MXC_IPG_CLK,
 	MXC_IPG_PERCLK,
@@ -36,6 +36,32 @@ enum mxc_clock {
 	MXC_FEC_CLK,
 };
 
+enum mxc_main_clock {
+	CPU_CLK,
+	AHB_CLK,
+	IPG_CLK,
+	IPG_PER_CLK,
+	NFC_CLK,
+	USB_CLK,
+	HSP_CLK,
+};
+
+enum mxc_peri_clock {
+	UART1_BAUD,
+	UART2_BAUD,
+	UART3_BAUD,
+	SSI1_BAUD,
+	SSI2_BAUD,
+	CSI_BAUD,
+	MSHC_CLK,
+	ESDHC1_CLK,
+	ESDHC2_CLK,
+	ESDHC3_CLK,
+	SPDIF_CLK,
+	SPI1_CLK,
+	SPI2_CLK,
+};
+
 unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref);
 
 u32 imx_get_uartclk(void);
arch/arm/include/asm/arch-mx35/imx-regs.h +0 -26
index 3146006..fba29b2 100644
@@ -216,32 +216,6 @@
 #if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__))
 #include <asm/types.h>
 
-enum mxc_main_clocks {
-	CPU_CLK,
-	AHB_CLK,
-	IPG_CLK,
-	IPG_PER_CLK,
-	NFC_CLK,
-	USB_CLK,
-	HSP_CLK,
-};
-
-enum mxc_peri_clocks {
-	UART1_BAUD,
-	UART2_BAUD,
-	UART3_BAUD,
-	SSI1_BAUD,
-	SSI2_BAUD,
-	CSI_BAUD,
-	MSHC_CLK,
-	ESDHC1_CLK,
-	ESDHC2_CLK,
-	ESDHC3_CLK,
-	SPDIF_CLK,
-	SPI1_CLK,
-	SPI2_CLK,
-};
-
 /* Clock Control Module (CCM) registers */
 struct ccm_regs {
 	u32 ccmr;	/* Control */
#1 lore raw

PATCH 2/7 mx35: Remove declaration of non-existing function

---
 .../arch/arm/include/asm/arch-mx35/clock.h         |    2 --
 1 file changed, 2 deletions(-)
arch/arm/include/asm/arch-mx35/clock.h +0 -2
index 5dc53ba..e94f124 100644
@@ -62,8 +62,6 @@ enum mxc_peri_clock {
 	SPI2_CLK,
 };
 
-unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref);
-
 u32 imx_get_uartclk(void);
 u32 imx_get_fecclk(void);
 unsigned int mxc_get_clock(enum mxc_clock clk);
#2 lore raw

PATCH 2/7 mx35: Remove declaration of non-existing function

Quoted 3 lines · Beno?t Th?baudeau

---

Hi Beno?t,

Quoted 9 lines
 .../arch/arm/include/asm/arch-mx35/clock.h         |    2 --
 1 file changed, 2 deletions(-)
arch/arm/include/asm/arch-mx35/clock.h +0 -0
index 5dc53ba..e94f124 100644

arch/arm/include/asm/arch-mx35/clock.h enum mxc_peri_clock { · line 67

Quoted 8 lines
arch/arm/include/asm/arch-mx35/clock.h +0 -2
@@ -62,8 +62,6 @@ enum mxc_peri_clock {
 	SPI2_CLK,
 };
 
-unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref);
-
 u32 imx_get_uartclk(void);
 u32 imx_get_fecclk(void);
 unsigned int mxc_get_clock(enum mxc_clock clk);

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#3 lore raw

PATCH 3/7 mx35: Fix decode_pll

In reply to Benoît Thébaudeau

The MFN bit-field of the PLL registers represents a signed value. See the reference manual.

---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +6 -3
index dba4903..e369c86 100644
@@ -24,6 +24,7 @@
  */
 
 #include <common.h>
+#include <div64.h>
 #include <asm/io.h>
 #include <asm/errno.h>
 #include <asm/arch/imx-regs.h>
@@ -126,15 +127,17 @@ static int get_ahb_div(u32 pdr0)
 static u32 decode_pll(u32 reg, u32 infreq)
 {
 	u32 mfi = (reg >> 10) & 0xf;
-	u32 mfn = reg & 0x3f;
-	u32 mfd = (reg >> 16) & 0x3f;
+	s32 mfn = reg & 0x3ff;
+	u32 mfd = (reg >> 16) & 0x3ff;
 	u32 pd = (reg >> 26) & 0xf;
 
 	mfi = mfi <= 5 ? 5 : mfi;
+	mfn = mfn >= 512 ? mfn - 1024 : mfn;
 	mfd += 1;
 	pd += 1;
 
-	return ((2 * (infreq / 1000) * (mfi * mfd + mfn)) / (mfd * pd)) * 1000;
+	return lldiv(2 * (u64)infreq * (mfi * mfd + mfn),
+		mfd * pd);
 }
 
 static u32 get_mcu_main_clk(void)
#4 lore raw

PATCH 3/7 mx35: Fix decode_pll

Quoted 6 lines · Beno?t Th?baudeau

The MFN bit-field of the PLL registers represents a signed value. See the reference manual.

---

Hi Beno?t,

Quoted 16 lines
 .../arch/arm/cpu/arm1136/mx35/generic.c            |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +1 -0
index dba4903..e369c86 100644
@@ -24,6 +24,7 @@
  */
 
 #include <common.h>
+#include <div64.h>
 #include <asm/io.h>
 #include <asm/errno.h>
 #include <asm/arch/imx-regs.h>

arch/arm/cpu/arm1136/mx35/generic.c static int get_ahb_div(u32 pdr0) · line 131

Quoted 7 lines
arch/arm/cpu/arm1136/mx35/generic.c +2 -2
@@ -126,15 +127,17 @@ static int get_ahb_div(u32 pdr0)
 static u32 decode_pll(u32 reg, u32 infreq)
 {
 	u32 mfi = (reg >> 10) & 0xf;
-	u32 mfn = reg & 0x3f;
-	u32 mfd = (reg >> 16) & 0x3f;
+	s32 mfn = reg & 0x3ff;
+	u32 mfd = (reg >> 16) & 0x3ff;

The MFN is a signed value. But you are masking now 11 bits. According to the manual, bit 9-0 are MFN. You are taking in the mask the first bit of MFI, and this is wrong, isn't it ?

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#5 lore raw

PATCH 3/7 mx35: Fix decode_pll

Am 01/09/2012 10:15, schrieb Stefano Babic:

Quoted 29 lines · Beno?t Th?baudeau
Quoted 6 lines

The MFN bit-field of the PLL registers represents a signed value. See the reference manual.

---

Hi Beno?t,

Quoted 19 lines
 .../arch/arm/cpu/arm1136/mx35/generic.c            |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +1 -0
index dba4903..e369c86 100644
@@ -24,6 +24,7 @@
  */
 
 #include <common.h>
+#include <div64.h>
 #include <asm/io.h>
 #include <asm/errno.h>
 #include <asm/arch/imx-regs.h>
@@ -126,15 +127,17 @@ static int get_ahb_div(u32 pdr0)
 static u32 decode_pll(u32 reg, u32 infreq)
 {
 	u32 mfi = (reg >> 10) & 0xf;
Quoted 8 lines

arch/arm/cpu/arm1136/mx35/generic.c static int get_ahb_div(u32 pdr0) · line 131

Quoted 4 lines
arch/arm/cpu/arm1136/mx35/generic.c +2 -2
-	u32 mfn = reg & 0x3f;
-	u32 mfd = (reg >> 16) & 0x3f;
+	s32 mfn = reg & 0x3ff;
+	u32 mfd = (reg >> 16) & 0x3ff;

The MFN is a signed value. But you are masking now 11 bits. According to the manual, bit 9-0 are MFN. You are taking in the mask the first bit of MFI, and this is wrong, isn't it ?

Sorry, mask is correct

Regards,
Stefano

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================
#6 lore raw

PATCH 3/7 mx35: Fix decode_pll

In reply to Benoît Thébaudeau
Quoted 6 lines · Beno?t Th?baudeau

The MFN bit-field of the PLL registers represents a signed value. See the reference manual.

---

Applied to u-boot-imx, thanks.

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#7 lore raw

PATCH 4/7 mx35: Add definitions for clock gate values

In reply to Benoît Thébaudeau
---
 .../arch/arm/include/asm/arch-mx35/crm_regs.h      |    6 ++++++
 1 file changed, 6 insertions(+)
arch/arm/include/asm/arch-mx35/crm_regs.h +6 -0
index e903cf1..66bc1ba 100644
@@ -144,6 +144,12 @@
 #define MXC_CCM_ACMR_SSI2_CLK_SEL_MASK		(0xF << 0)
 
 /* Bit definitions for Clock gating Register*/
+#define MXC_CCM_CGR_CG_MASK			0x3
+#define MXC_CCM_CGR_CG_OFF			0x0
+#define MXC_CCM_CGR_CG_RUN_ON			0x1
+#define MXC_CCM_CGR_CG_RUN_WAIT_ON		0x2
+#define MXC_CCM_CGR_CG_ON			0x3
+
 #define MXC_CCM_CGR0_ASRC_OFFSET		0
 #define MXC_CCM_CGR0_ASRC_MASK			(0x3 << 0)
 #define MXC_CCM_CGR0_ATA_OFFSET			2
#8 lore raw

PATCH 4/7 mx35: Add definitions for clock gate values

Quoted 3 lines · Beno?t Th?baudeau

---

Applied to u-boot-imx, thanks.

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#9 lore raw

PATCH 5/7 mx35: Fix clock dividers

In reply to Benoît Thébaudeau

The clock dividers that were used do not match at all the reference manual. They were either completely broken, or came from an early silicon revision incompatible with the current one.

---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |   48 ++++++++------------
 .../arch/arm/include/asm/arch-mx35/crm_regs.h      |   42 ++++++-----------
 2 files changed, 31 insertions(+), 59 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +18 -30
index e369c86..4af052c 100644
@@ -171,17 +171,14 @@ static u32 get_ipg_per_clk(void)
 	u32 pdr4 = readl(&ccm->pdr4);
 	u32 div;
 	if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
-		div = (CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_PER0_PRDF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1) *
-			(CCM_GET_DIVIDER(pdr4,
+		div = CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_PER0_PODF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1);
+			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;
 	} else {
 		div = CCM_GET_DIVIDER(pdr0,
 			MXC_CCM_PDR0_PER_PODF_MASK,
 			MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
-		freq /= get_ahb_div(pdr0);
+		div *= get_ahb_div(pdr0);
 	}
 	return freq / div;
 }
@@ -199,19 +196,16 @@ u32 imx_get_uartclk(void)
 		freq = decode_pll(readl(&ccm->ppctl),
 			CONFIG_MX35_HCLK_FREQ);
 	}
-	freq /= ((CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_UART_PRDF_MASK,
-			MXC_CCM_PDR4_UART_PRDF_OFFSET) + 1) *
-		(CCM_GET_DIVIDER(pdr4,
+	freq /= CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_UART_PODF_MASK,
-			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1));
+			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;
 	return freq;
 }
 
 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 {
 	u32 nfc_pdf, hsp_podf;
-	u32 pll, ret_val = 0, usb_prdf, usb_podf;
+	u32 pll, ret_val = 0, usb_podf;
 	struct ccm_regs *ccm =
 		(struct ccm_regs *)IMX_CCM_BASE;
 
@@ -255,8 +249,7 @@ unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 		ret_val = pll / (nfc_pdf + 1);
 		break;
 	case USB_CLK:
-		usb_prdf = (reg4 >> 25) & 0x7;
-		usb_podf = (reg4 >> 22) & 0x7;
+		usb_podf = (reg4 >> 22) & 0x3F;
 		if (reg4 & 0x200) {
 			pll = get_mcu_main_clk();
 		} else {
@@ -264,7 +257,7 @@ unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 				CONFIG_MX35_HCLK_FREQ);
 		}
 
-		ret_val = pll / ((usb_prdf + 1) * (usb_podf + 1));
+		ret_val = pll / (usb_podf + 1);
 		break;
 	default:
 		printf("Unknown clock: %d\n", clk);
@@ -287,11 +280,10 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 	case UART2_BAUD:
 	case UART3_BAUD:
 		clk_sel = mpdr3 & (1 << 14);
-		pre_pdf = (mpdr4 >> 13) & 0x7;
-		pdf = (mpdr4 >> 10) & 0x7;
+		pdf = (mpdr4 >> 10) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
 			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+				(pdf + 1);
 		break;
 	case SSI1_BAUD:
 		pre_pdf = (mpdr2 >> 24) & 0x7;
@@ -311,11 +303,10 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 		break;
 	case CSI_BAUD:
 		clk_sel = mpdr2 & (1 << 7);
-		pre_pdf = (mpdr2 >> 16) & 0x7;
-		pdf = (mpdr2 >> 19) & 0x7;
+		pdf = (mpdr2 >> 16) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
 			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+				(pdf + 1);
 		break;
 	case MSHC_CLK:
 		pre_pdf = readl(&ccm->pdr1);
@@ -328,27 +319,24 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 		break;
 	case ESDHC1_CLK:
 		clk_sel = mpdr3 & 0x40;
-		pre_pdf = mpdr3 & 0x7;
-		pdf = (mpdr3>>3) & 0x7;
+		pdf = mpdr3 & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
 			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+				(pdf + 1);
 		break;
 	case ESDHC2_CLK:
 		clk_sel = mpdr3 & 0x40;
-		pre_pdf = (mpdr3 >> 8) & 0x7;
-		pdf = (mpdr3 >> 11) & 0x7;
+		pdf = (mpdr3 >> 8) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
 			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+				(pdf + 1);
 		break;
 	case ESDHC3_CLK:
 		clk_sel = mpdr3 & 0x40;
-		pre_pdf = (mpdr3 >> 16) & 0x7;
-		pdf = (mpdr3 >> 19) & 0x7;
+		pdf = (mpdr3 >> 16) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
 			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				((pre_pdf + 1) * (pdf + 1));
+				(pdf + 1);
 		break;
 	case SPDIF_CLK:
 		clk_sel = mpdr3 & 0x400000;
arch/arm/include/asm/arch-mx35/crm_regs.h +13 -29

83 lines not on this page · raw message

#10 lore raw

PATCH 5/7 mx35: Fix clock dividers

Quoted 16 lines · Beno?t Th?baudeau

The clock dividers that were used do not match at all the reference manual. They were either completely broken, or came from an early silicon revision incompatible with the current one.

---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |   48 ++++++++------------
 .../arch/arm/include/asm/arch-mx35/crm_regs.h      |   42 ++++++-----------
 2 files changed, 31 insertions(+), 59 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +0 -0
index e369c86..4af052c 100644

arch/arm/cpu/arm1136/mx35/generic.c static u32 get_ipg_per_clk(void) · line 177

Quoted 7 lines
arch/arm/cpu/arm1136/mx35/generic.c +0 -4
@@ -171,17 +171,14 @@ static u32 get_ipg_per_clk(void)
 	u32 pdr4 = readl(&ccm->pdr4);
 	u32 div;
 	if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
-		div = (CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_PER0_PRDF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1) *
-			(CCM_GET_DIVIDER(pdr4,

It seems also to me that the current code is wrong if MXC_CCM_PDR0_PER_SEL is set. Maybe it was never set. As I see in figure 5-4, the ipg_per_clk depends only on pdr[21:16]. No idea where the second multiplier comes.

arch/arm/cpu/arm1136/mx35/generic.c static u32 get_ipg_per_clk(void) · line 176

Quoted 4 lines
arch/arm/cpu/arm1136/mx35/generic.c +2 -1
+		div = CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_PER0_PODF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1);
+			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;

The name remains quite confusing. In the manual is PER0_DIV, which is the meaning of PODF here ?

Anyway, the masks you set are correct, I agree.

arch/arm/cpu/arm1136/mx35/generic.c static u32 get_ipg_per_clk(void) · line 181

Quoted 6 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -1
 	} else {
 		div = CCM_GET_DIVIDER(pdr0,
 			MXC_CCM_PDR0_PER_PODF_MASK,
 			MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
-		freq /= get_ahb_div(pdr0);
+		div *= get_ahb_div(pdr0);

This does not change the behavior.

Quoted 5 lines
arch/arm/cpu/arm1136/mx35/generic.c +0 -0
 	}
 	return freq / div;
 }
@@ -199,19 +196,16 @@ u32 imx_get_uartclk(void)
 		freq = decode_pll(readl(&ccm->ppctl),

arch/arm/cpu/arm1136/mx35/generic.c u32 imx_get_uartclk(void) · line 201

Quoted 10 lines
arch/arm/cpu/arm1136/mx35/generic.c +2 -5
 			CONFIG_MX35_HCLK_FREQ);
 	}
-	freq /= ((CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_UART_PRDF_MASK,
-			MXC_CCM_PDR4_UART_PRDF_OFFSET) + 1) *
-		(CCM_GET_DIVIDER(pdr4,
+	freq /= CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_UART_PODF_MASK,
-			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1));
+			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;

This is also right. I am only asking myself why it works correctly now.

Quoted 12 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -1
 	return freq;
 }
 
 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 {
 	u32 nfc_pdf, hsp_podf;
-	u32 pll, ret_val = 0, usb_prdf, usb_podf;
+	u32 pll, ret_val = 0, usb_podf;
 	struct ccm_regs *ccm =
 		(struct ccm_regs *)IMX_CCM_BASE;
 

arch/arm/cpu/arm1136/mx35/generic.c unsigned int mxc_get_main_clock(enum mxc_main_clock clk) · line 252

Quoted 6 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -2
@@ -255,8 +249,7 @@ unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 		ret_val = pll / (nfc_pdf + 1);
 		break;
 	case USB_CLK:
-		usb_prdf = (reg4 >> 25) & 0x7;
-		usb_podf = (reg4 >> 22) & 0x7;
+		usb_podf = (reg4 >> 22) & 0x3F;

Agree again. The code seems generated from another manual. Maybe the USB_DIV field was split into two fields. With this in mind, there is no apparent error in current code, but it cannot be derived from the manual.

arch/arm/cpu/arm1136/mx35/generic.c unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk) · line 283

Quoted 10 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -2
 		break;
 	default:
 		printf("Unknown clock: %d\n", clk);
@@ -287,11 +280,10 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 	case UART2_BAUD:
 	case UART3_BAUD:
 		clk_sel = mpdr3 & (1 << 14);
-		pre_pdf = (mpdr4 >> 13) & 0x7;
-		pdf = (mpdr4 >> 10) & 0x7;
+		pdf = (mpdr4 >> 10) & 0x3F;

Right !

The main issue about this patch is that it does not fix one problem, but a lot of. Really it should be split into several patches. Anyway, I will make some tests on the mx35 boards I have - if I will not get problems, I will push it, hoping that someone else can make some further tests.

Best regards,
Stefano

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#11 lore raw

PATCH 5/7 mx35: Fix clock dividers

Hi Stefano,

Quoted 27 lines · Stefano Babic
Quoted 26 lines · Beno?t Th?baudeau

The clock dividers that were used do not match at all the reference manual. They
were either completely broken, or came from an early silicon revision
incompatible with the current one.

---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |   48
 ++++++++------------
 .../arch/arm/include/asm/arch-mx35/crm_regs.h      |   42
 ++++++-----------
 2 files changed, 31 insertions(+), 59 deletions(-)
(quoted diff) +0 -0

u-boot-4d3c95f/arch/arm/cpu/arm1136/mx35/generic.c index e369c86..4af052c 100644

arch/arm/cpu/arm1136/mx35/generic.c +0 -2
@@ -171,17 +171,14 @@ static u32 get_ipg_per_clk(void)
 	u32 pdr4 = readl(&ccm->pdr4);
 	u32 div;
 	if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
-		div = (CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_PER0_PRDF_MASK,
Quoted 8 lines

arch/arm/cpu/arm1136/mx35/generic.c static u32 get_ipg_per_clk(void) · line 177

Quoted 2 lines
arch/arm/cpu/arm1136/mx35/generic.c +0 -2
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1) *
-			(CCM_GET_DIVIDER(pdr4,

It seems also to me that the current code is wrong if MXC_CCM_PDR0_PER_SEL is set. Maybe it was never set. As I see in figure
5-4, the ipg_per_clk depends only on pdr[21:16]. No idea where the second multiplier comes.

It looks like the current code is based on a pre(PRDF)-/post(PODF)-divider scheme. Perhaps the first silicon revision was different and incompatible, or it was just a bug in the older revisions of the reference manual. The history of the reference manual says that this figure and some CCM register descriptions have been updated at some point. Anyway, Linux does like my patch.

Quoted 7 lines

arch/arm/cpu/arm1136/mx35/generic.c static u32 get_ipg_per_clk(void) · line 176

Quoted 4 lines
arch/arm/cpu/arm1136/mx35/generic.c +2 -1
+		div = CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_PER0_PODF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1);
+			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;

The name remains quite confusing. In the manual is PER0_DIV, which is the meaning of PODF here ?

It the abbreviation FSL uses for post-dividers. If the pre-divider is merged with the post-divider to form a single divider, the naming from the RM makes more sense. Do you want a new version changing this naming?

Quoted 10 lines

Anyway, the masks you set are correct, I agree.

arch/arm/cpu/arm1136/mx35/generic.c static u32 get_ipg_per_clk(void) · line 181

Quoted 6 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -1
 	} else {
 		div = CCM_GET_DIVIDER(pdr0,
 			MXC_CCM_PDR0_PER_PODF_MASK,
 			MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
-		freq /= get_ahb_div(pdr0);
+		div *= get_ahb_div(pdr0);

This does not change the behavior.

It does: Dividing twice in a row affects rounding.

Quoted 10 lines
Quoted 10 lines
arch/arm/cpu/arm1136/mx35/generic.c +0 -3
 	}
 	return freq / div;
 }
@@ -199,19 +196,16 @@ u32 imx_get_uartclk(void)
 		freq = decode_pll(readl(&ccm->ppctl),
 			CONFIG_MX35_HCLK_FREQ);
 	}
-	freq /= ((CCM_GET_DIVIDER(pdr4,
-			MXC_CCM_PDR4_UART_PRDF_MASK,
-			MXC_CCM_PDR4_UART_PRDF_OFFSET) + 1) *
Quoted 8 lines

arch/arm/cpu/arm1136/mx35/generic.c u32 imx_get_uartclk(void) · line 201

Quoted 5 lines
arch/arm/cpu/arm1136/mx35/generic.c +2 -2
-		(CCM_GET_DIVIDER(pdr4,
+	freq /= CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_UART_PODF_MASK,
-			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1));
+			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;

This is also right. I am only asking myself why it works correctly now.

It currently works... or not depending on the divider settings selected by board inits. As long as the bits in the current PRDF bit-fields are kept cleared (luck...), it works.

Quoted 11 lines
Quoted 11 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -1
 	return freq;
 }
 
 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 {
 	u32 nfc_pdf, hsp_podf;
-	u32 pll, ret_val = 0, usb_prdf, usb_podf;
+	u32 pll, ret_val = 0, usb_podf;
 	struct ccm_regs *ccm =
 		(struct ccm_regs *)IMX_CCM_BASE;
 
Quoted 14 lines

arch/arm/cpu/arm1136/mx35/generic.c unsigned int mxc_get_main_clock(enum · line 253

Quoted 8 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -2
@@ -255,8 +249,7 @@ unsigned int mxc_get_main_clock(enum
 mxc_main_clock clk)
 		ret_val = pll / (nfc_pdf + 1);
 		break;
 	case USB_CLK:
-		usb_prdf = (reg4 >> 25) & 0x7;
-		usb_podf = (reg4 >> 22) & 0x7;
+		usb_podf = (reg4 >> 22) & 0x3F;

Agree again. The code seems generated from another manual. Maybe the USB_DIV field was split into two fields. With this in mind, there is no
apparent error in current code, but it cannot be derived from the manual.

The resulting frequency is different here too if some PRDF bits are set.

Quoted 15 lines

arch/arm/cpu/arm1136/mx35/generic.c unsigned int mxc_get_peri_clock(enum · line 284

Quoted 11 lines
arch/arm/cpu/arm1136/mx35/generic.c +0 -0
 		break;
 	default:
arch/arm/cpu/arm1136/mx35/generic.c +1 -2
 		printf("Unknown clock: %d\n", clk);
@@ -287,11 +280,10 @@ unsigned int mxc_get_peri_clock(enum
 mxc_peri_clock clk)
 	case UART2_BAUD:
 	case UART3_BAUD:
 		clk_sel = mpdr3 & (1 << 14);
-		pre_pdf = (mpdr4 >> 13) & 0x7;
-		pdf = (mpdr4 >> 10) & 0x7;
+		pdf = (mpdr4 >> 10) & 0x3F;

Right !

Quoted 3 lines

The main issue about this patch is that it does not fix one problem, but
a lot of. Really it should be split into several patches.

Indeed, but these problems have a common root cause: wrong RM in some way.

Quoted 5 lines

Anyway, I
will
make some tests on the mx35 boards I have - if I will not get problems,
I will push it, hoping that someone else can make some further tests.

OK. I have also tested it on a board that I have here.

The best test would be to set some PRDF bits and to scope the resulting frequency (e.g. with PER0_DIV and I?C SCL). I'm not sure I have already performed this specific test. I'll do that when possible.

There is also stuff like AUTO_CON and AUTO_MUX_DIV that are now marked as reserved in the RM. I've kept this code since it can not be harmful contrary to the wrong decoding of the divider fields.

Best regards,
Beno?t

#12 lore raw

PATCH 5/7 mx35: Fix clock dividers

Quoted 2 lines · Beno?t Th?baudeau

Hi Stefano,

Hi Beno?t,

Quoted 8 lines
Quoted 5 lines

It seems also to me that the current code is wrong if MXC_CCM_PDR0_PER_SEL is set. Maybe it was never set. As I see in figure
5-4, the ipg_per_clk depends only on pdr[21:16]. No idea where the second multiplier comes.

It looks like the current code is based on a pre(PRDF)-/post(PODF)-divider scheme.

I thought the same.

Quoted 13 lines

Perhaps the first silicon revision was different and incompatible, or it was just a bug in the older revisions of the reference manual. The history of the reference manual says that this figure and some CCM register descriptions have been updated at some point. Anyway, Linux does like my patch.

Quoted 7 lines

arch/arm/cpu/arm1136/mx35/generic.c static u32 get_ipg_per_clk(void) · line 176

Quoted 4 lines
arch/arm/cpu/arm1136/mx35/generic.c +2 -1
+		div = CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_PER0_PODF_MASK,
-			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1);
+			MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;

The name remains quite confusing. In the manual is PER0_DIV, which is the meaning of PODF here ?

Quoted 3 lines

It the abbreviation FSL uses for post-dividers. If the pre-divider is merged with the post-divider to form a single divider, the naming from the RM makes more sense. Do you want a new version changing this naming?

Yes, make this small change - then from my point of view I am ready to merge it.

Regards,
Stefano

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#13 lore raw

PATCH 5/7 mx35: Fix clock dividers

Quoted 2 lines · Stefano Babic

Yes, make this small change - then from my point of view I am ready to merge it.

Nevermind - this is really a detail. I prefer to fix soon the bugs. Thanks for having discovered and fixed. I merge the series now.

Regards,
Stefano

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#14 lore raw

PATCH 5/7 mx35: Fix clock dividers

In reply to Benoît Thébaudeau
Quoted 7 lines · Beno?t Th?baudeau

The clock dividers that were used do not match at all the reference manual. They were either completely broken, or came from an early silicon revision incompatible with the current one.

---

Applied to u-boot-imx, thanks.

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#15 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

In reply to Benoît Thébaudeau

Each eSDHC instance has a dedicated clock.

---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |   14 ++++++++++++--
 .../arch/arm/include/asm/arch-mx35/clock.h         |    4 +++-
 2 files changed, 15 insertions(+), 3 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +12 -2
index 4af052c..15a0098 100644
@@ -368,8 +368,12 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return imx_get_uartclk();
-	case MXC_ESDHC_CLK:
+	case MXC_ESDHC1_CLK:
 		return mxc_get_peri_clock(ESDHC1_CLK);
+	case MXC_ESDHC2_CLK:
+		return mxc_get_peri_clock(ESDHC2_CLK);
+	case MXC_ESDHC3_CLK:
+		return mxc_get_peri_clock(ESDHC3_CLK);
 	case MXC_USB_CLK:
 		return mxc_get_main_clock(USB_CLK);
 	case MXC_FEC_CLK:
@@ -469,7 +473,13 @@ int cpu_eth_init(bd_t *bis)
 int get_clocks(void)
 {
 #ifdef CONFIG_FSL_ESDHC
-	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+#if CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC1_BASE_ADDR
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
+#elif CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC2_BASE_ADDR
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+#elif CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC3_BASE_ADDR
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+#endif
 #endif
 	return 0;
 }
arch/arm/include/asm/arch-mx35/clock.h +3 -1
index e94f124..0575dad 100644
@@ -30,7 +30,9 @@ enum mxc_clock {
 	MXC_IPG_CLK,
 	MXC_IPG_PERCLK,
 	MXC_UART_CLK,
-	MXC_ESDHC_CLK,
+	MXC_ESDHC1_CLK,
+	MXC_ESDHC2_CLK,
+	MXC_ESDHC3_CLK,
 	MXC_USB_CLK,
 	MXC_CSPI_CLK,
 	MXC_FEC_CLK,
#16 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

Quoted 5 lines · Beno?t Th?baudeau

Each eSDHC instance has a dedicated clock.

---

Hi Beno?t,

Quoted 12 lines
 .../arch/arm/cpu/arm1136/mx35/generic.c            |   14 ++++++++++++--
 .../arch/arm/include/asm/arch-mx35/clock.h         |    4 +++-
 2 files changed, 15 insertions(+), 3 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +0 -0
index 4af052c..15a0098 100644
@@ -368,8 +368,12 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return imx_get_uartclk();

arch/arm/cpu/arm1136/mx35/generic.c unsigned int mxc_get_clock(enum mxc_clock clk) · line 379

Quoted 10 lines
arch/arm/cpu/arm1136/mx35/generic.c +5 -1
-	case MXC_ESDHC_CLK:
+	case MXC_ESDHC1_CLK:
 		return mxc_get_peri_clock(ESDHC1_CLK);
+	case MXC_ESDHC2_CLK:
+		return mxc_get_peri_clock(ESDHC2_CLK);
+	case MXC_ESDHC3_CLK:
+		return mxc_get_peri_clock(ESDHC3_CLK);
 	case MXC_USB_CLK:
 		return mxc_get_main_clock(USB_CLK);
 	case MXC_FEC_CLK:

Your change let understand that we can have different clocks among the ESDHC controllers. One thing is not clear to me is that the MX35 have two ESDHC controllers, and you define here a thitd one. Where is it ?

Even if the two controllers can have different clocks, this is not supported by the driver. In fact, in drivers/mmc/fsl_esdhc.c:

int sdhc_clk = gd->sdhc_clk;

The driver uses always the same clock, stored in the global structure. Before extending the code as in this patch, the driver should be modified to handle separate clocks. Currently the driver supports multiple controller, but they share the same clock or at least the same frequency.

Best regards,
Stefano

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#17 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

Hi Stefano,

Quoted 29 lines · Beno?t Th?baudeau
Quoted 5 lines

Each eSDHC instance has a dedicated clock.

---

Hi Beno?t,

Quoted 20 lines
 .../arch/arm/cpu/arm1136/mx35/generic.c            |   14
 ++++++++++++--
 .../arch/arm/include/asm/arch-mx35/clock.h         |    4 +++-
 2 files changed, 15 insertions(+), 3 deletions(-)
(quoted diff) +0 -0

u-boot-4d3c95f/arch/arm/cpu/arm1136/mx35/generic.c index 4af052c..15a0098 100644

arch/arm/cpu/arm1136/mx35/generic.c +4 -1
@@ -368,8 +368,12 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return imx_get_uartclk();
-	case MXC_ESDHC_CLK:
+	case MXC_ESDHC1_CLK:
 		return mxc_get_peri_clock(ESDHC1_CLK);
+	case MXC_ESDHC2_CLK:
+		return mxc_get_peri_clock(ESDHC2_CLK);
+	case MXC_ESDHC3_CLK:
Quoted 8 lines

arch/arm/cpu/arm1136/mx35/generic.c unsigned int mxc_get_clock(enum mxc_clock clk) · line 379

Quoted 4 lines
arch/arm/cpu/arm1136/mx35/generic.c +1 -0
+		return mxc_get_peri_clock(ESDHC3_CLK);
 	case MXC_USB_CLK:
 		return mxc_get_main_clock(USB_CLK);
 	case MXC_FEC_CLK:

Your change let understand that we can have different clocks among the
ESDHC controllers.

Indeed.

Quoted 2 lines

One thing is not clear to me is that the MX35 have
two ESDHC controllers, and you define here a thitd one. Where is it ?

No, there are 3. See the reference manual. It's referenced in the memory map, in the interrupts, in the pin multiplexing and in the clocks.

Quoted 5 lines

Even if the two controllers can have different clocks, this is not supported by the driver. In fact, in drivers/mmc/fsl_esdhc.c:

int sdhc_clk = gd->sdhc_clk;

Quoted 7 lines

The driver uses always the same clock, stored in the global structure.
Before extending the code as in this patch, the driver should be modified to handle separate clocks. Currently the driver supports multiple controller, but they share the same clock or at least the same
frequency.

Indeed, I had seen that. I didn't know what to decide as to the driver clocks, so I made this change to select the correct clock if a single clock or frequency is used.

If several clock frequencies are to be supported at once, what kind of API would you like? gd->sdhc_clk could be changed to an array, then the corresponding index could be passed to the init function through the fsl_esdhc_cfg struct.

Best regards,
Beno?t

#18 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

Hi Stefano,

Quoted 19 lines
Quoted 5 lines

Even if the two controllers can have different clocks, this is not supported by the driver. In fact, in drivers/mmc/fsl_esdhc.c:

int sdhc_clk = gd->sdhc_clk;

Quoted 7 lines

The driver uses always the same clock, stored in the global structure.
Before extending the code as in this patch, the driver should be modified to handle separate clocks. Currently the driver supports multiple controller, but they share the same clock or at least the same
frequency.

Indeed, I had seen that. I didn't know what to decide as to the driver clocks,
so I made this change to select the correct clock if a single clock or frequency
is used.

Quoted 6 lines

If several clock frequencies are to be supported at once, what kind of API would
you like? gd->sdhc_clk could be changed to an array, then the corresponding
index could be passed to the init function through the fsl_esdhc_cfg struct.

But there is also the issue of fsl_esdhc_mmc_init() that would need a new config just to pass this index. I don't like that. Any suggestion?

Best regards,
Beno?t

#19 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

Quoted 2 lines · Beno?t Th?baudeau

Hi Stefano,

Hi Beno?t,

Quoted 26 lines
Quoted 19 lines
Quoted 5 lines

Even if the two controllers can have different clocks, this is not supported by the driver. In fact, in drivers/mmc/fsl_esdhc.c:

int sdhc_clk = gd->sdhc_clk;

Quoted 7 lines

The driver uses always the same clock, stored in the global structure.
Before extending the code as in this patch, the driver should be modified to handle separate clocks. Currently the driver supports multiple controller, but they share the same clock or at least the same
frequency.

Indeed, I had seen that. I didn't know what to decide as to the driver clocks,
so I made this change to select the correct clock if a single clock or frequency
is used.

Quoted 6 lines

If several clock frequencies are to be supported at once, what kind of API would
you like? gd->sdhc_clk could be changed to an array, then the corresponding
index could be passed to the init function through the fsl_esdhc_cfg struct.

Quoted 2 lines

But there is also the issue of fsl_esdhc_mmc_init() that would need a new config just to pass this index. I don't like that. Any suggestion?

There is another issue. The driver is used by both ARM (i.MX) and PowerPCs (PowerQuickIII, ...).

fsl_esdhc_mmc_init() is already the interface when one parameter is enough. If we need more than one controller, we should already call fsl_esdhc_initialize() with the cfg structure.

Then adding a field to the struct fsl_esdhc_cfg is maybe not too bad. Instead of an index, we can add directly the frequency - reading the driver this is all that the driver needs.

Best regards,
Stefano

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#20 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

Hi Stefano,

Quoted 38 lines
Quoted 31 lines
Quoted 22 lines
Quoted 6 lines

Even if the two controllers can have different clocks, this is not
supported by the driver. In fact, in drivers/mmc/fsl_esdhc.c:

int sdhc_clk = gd->sdhc_clk;

Quoted 8 lines

The driver uses always the same clock, stored in the global structure.
Before extending the code as in this patch, the driver should be modified to handle separate clocks. Currently the driver supports multiple controller, but they share the same clock or at least the
same
frequency.

Indeed, I had seen that. I didn't know what to decide as to the driver clocks,
so I made this change to select the correct clock if a single clock
or frequency
is used.

Quoted 8 lines

If several clock frequencies are to be supported at once, what kind
of API would
you like? gd->sdhc_clk could be changed to an array, then the corresponding
index could be passed to the init function through the fsl_esdhc_cfg
struct.

Quoted 3 lines

But there is also the issue of fsl_esdhc_mmc_init() that would need a new config
just to pass this index. I don't like that. Any suggestion?

There is another issue. The driver is used by both ARM (i.MX) and PowerPCs (PowerQuickIII, ...).

Quoted 7 lines

fsl_esdhc_mmc_init() is already the interface when one parameter is enough. If we need more than one controller, we should already call fsl_esdhc_initialize() with the cfg structure.

Then adding a field to the struct fsl_esdhc_cfg is maybe not too bad. Instead of an index, we can add directly the frequency - reading the driver this is all that the driver needs.

OK, then this patch does the job for the single eSDHC instance use case, which will still use gd->sdhc_clk. I will make another patch before or after this one for the multi-instance use case. I will do the same in the v2 of my mx5 clock series (for gd->sdhc_clk). I think I also have the same stuff for mx25.

Best regards,
Beno?t

#21 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

Quoted 3 lines · Beno?t Th?baudeau

OK, then this patch does the job for the single eSDHC instance use case, which will still use gd->sdhc_clk.

Yes, but then we do not need ESDHC1, ESDHC2 and ESDHC3, because the driver does not support different clocks.

Quoted 2 lines

I will make another patch before or after this one for the multi-instance use case.

Fine.

Quoted 2 lines

I will do the same in the v2 of my mx5 clock
series (for gd->sdhc_clk). I think I also have the same stuff for mx25.

Ok - I read the series for MX5, but I need to check it with the manuals to understand the changes. I need some more time...

Best regards,
Stefano

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#22 lore raw

PATCH 6/7 mx35: Fix eSDHC clocks

Hi Stefano,

Quoted 7 lines
Quoted 4 lines

OK, then this patch does the job for the single eSDHC instance use case, which
will still use gd->sdhc_clk.

Yes, but then we do not need ESDHC1, ESDHC2 and ESDHC3, because the driver does not support different clocks.

We need them: Yes, the driver supports a single eSDHC instance and a single clock with gd->sdhc_clk and fsl_esdhc_mmc_init(), but there is a choice to determine at compile time depending on CONFIG_SYS_FSL_ESDHC_ADDR. You don't want to use the clock of eSDHC1 if CONFIG_SYS_FSL_ESDHC_ADDR selects eSDHC2. This is use case exists on i.MX with cpu_mmc_init() if a single eSDHC instance is needed.

Quoted 4 lines
Quoted 2 lines

I will make another patch before or after this one for the multi-instance use case.

Fine.

OK.

Quoted 7 lines
Quoted 3 lines

I will do the same in the v2 of my mx5 clock
series (for gd->sdhc_clk). I think I also have the same stuff for mx25.

Ok - I read the series for MX5, but I need to check it with the manuals
to understand the changes. I need some more time...

No problem.

Best regards,
Beno?t

#23 lore raw

PATCH v2 1/1 mx35: Fix eSDHC clocks

In reply to Benoît Thébaudeau

Each eSDHC instance has a dedicated clock.

gd->sdhc_clk must also be set accordingly. This is good for the case only a single SDHC instance is used (initialization made with fsl_esdhc_mmc_init()). A future patch will fix the multi-instance use case (initialization made directly with fsl_esdhc_initialize()).

Cc Stefano Babic <[email protected]>
Cc Eric B?nard <[email protected]>
Cc Otavio Salvador <[email protected]>

---
This patch supersedes http://patchwork.ozlabs.org/patch/177438/ . Changes for v2:
- Improve detailed description.
- Make eSDHC1 the default for gd->sdhc_clk.

 .../arch/arm/cpu/arm1136/mx35/generic.c            |   14 ++++++++++++--
 .../arch/arm/include/asm/arch-mx35/clock.h         |    4 +++-
 2 files changed, 15 insertions(+), 3 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +12 -2
index ef65176..75c25d4 100644
@@ -360,8 +360,12 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return imx_get_uartclk();
-	case MXC_ESDHC_CLK:
+	case MXC_ESDHC1_CLK:
 		return mxc_get_peri_clock(ESDHC1_CLK);
+	case MXC_ESDHC2_CLK:
+		return mxc_get_peri_clock(ESDHC2_CLK);
+	case MXC_ESDHC3_CLK:
+		return mxc_get_peri_clock(ESDHC3_CLK);
 	case MXC_USB_CLK:
 		return mxc_get_main_clock(USB_CLK);
 	case MXC_FEC_CLK:
@@ -471,7 +475,13 @@ int cpu_mmc_init(bd_t *bis)
 int get_clocks(void)
 {
 #ifdef CONFIG_FSL_ESDHC
-	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+#if CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC2_BASE_ADDR
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+#elif CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC3_BASE_ADDR
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+#else
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
+#endif
 #endif
 	return 0;
 }
arch/arm/include/asm/arch-mx35/clock.h +3 -1
index eb7458a..60285df 100644
@@ -44,7 +44,9 @@ enum mxc_clock {
 	MXC_IPG_CLK,
 	MXC_IPG_PERCLK,
 	MXC_UART_CLK,
-	MXC_ESDHC_CLK,
+	MXC_ESDHC1_CLK,
+	MXC_ESDHC2_CLK,
+	MXC_ESDHC3_CLK,
 	MXC_USB_CLK,
 	MXC_CSPI_CLK,
 	MXC_FEC_CLK,
#24 lore raw

PATCH v2 1/1 mx35: Fix eSDHC clocks

Quoted 7 lines · Beno?t Th?baudeau

Each eSDHC instance has a dedicated clock.

gd->sdhc_clk must also be set accordingly. This is good for the case only a single SDHC instance is used (initialization made with fsl_esdhc_mmc_init()). A future patch will fix the multi-instance use case (initialization made directly with fsl_esdhc_initialize()).

Quoted 5 lines
Cc Stefano Babic <[email protected]>
Cc Eric B?nard <[email protected]>
Cc Otavio Salvador <[email protected]>

---

Applied to u-boot-imx, next branch, thanks.

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#25 lore raw

PATCH 7/7 mx35: Add cpu_mmc_init()

In reply to Benoît Thébaudeau

Add cpu_mmc_init() function to make it easy to init a single eSDHC instance.

---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |   19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)
arch/arm/cpu/arm1136/mx35/generic.c +18 -1
index 15a0098..7b643b7 100644
@@ -31,6 +31,9 @@
 #include <asm/arch/crm_regs.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/sys_proto.h>
+#ifdef CONFIG_FSL_ESDHC
+#include <fsl_esdhc.h>
+#endif
 #include <netdev.h>
 
 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
@@ -458,7 +461,6 @@ int print_cpuinfo(void)
  * Initializes on-chip ethernet controllers.
  * to override, implement board_eth_init()
  */
-
 int cpu_eth_init(bd_t *bis)
 {
 	int rc = -ENODEV;
@@ -470,6 +472,21 @@ int cpu_eth_init(bd_t *bis)
 	return rc;
 }
 
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()
+ */
+int cpu_mmc_init(bd_t * bis)
+{
+	int rc = -ENODEV;
+
+#ifdef CONFIG_FSL_ESDHC
+	rc = fsl_esdhc_mmc_init(bis);
+#endif
+
+	return rc;
+}
+
 int get_clocks(void)
 {
 #ifdef CONFIG_FSL_ESDHC
#26 lore raw

PATCH v2 7/7 mx35: Add cpu_mmc_init()

Add cpu_mmc_init() function to make it easy to init a single eSDHC instance.

---
Changes for v2:
- Do not define cpu_mmc_init() if CONFIG_FSL_ESDHC is not defined.

 .../arch/arm/cpu/arm1136/mx35/generic.c            |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
arch/arm/cpu/arm1136/mx35/generic.c +14 -1
index 15a0098..8f61069 100644
@@ -31,6 +31,9 @@
 #include <asm/arch/crm_regs.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/sys_proto.h>
+#ifdef CONFIG_FSL_ESDHC
+#include <fsl_esdhc.h>
+#endif
 #include <netdev.h>
 
 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
@@ -458,7 +461,6 @@ int print_cpuinfo(void)
  * Initializes on-chip ethernet controllers.
  * to override, implement board_eth_init()
  */
-
 int cpu_eth_init(bd_t *bis)
 {
 	int rc = -ENODEV;
@@ -470,6 +472,17 @@ int cpu_eth_init(bd_t *bis)
 	return rc;
 }
 
+#ifdef CONFIG_FSL_ESDHC
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()
+ */
+int cpu_mmc_init(bd_t *bis)
+{
+	return fsl_esdhc_mmc_init(bis);
+}
+#endif
+
 int get_clocks(void)
 {
 #ifdef CONFIG_FSL_ESDHC
#27 lore raw

PATCH v2 7/7 mx35: Add cpu_mmc_init()

Quoted 42 lines · Beno?t Th?baudeau

Add cpu_mmc_init() function to make it easy to init a single eSDHC instance.

---
Changes for v2:
- Do not define cpu_mmc_init() if CONFIG_FSL_ESDHC is not defined.

 .../arch/arm/cpu/arm1136/mx35/generic.c            |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
arch/arm/cpu/arm1136/mx35/generic.c +7 -1
index 15a0098..8f61069 100644
@@ -31,6 +31,9 @@
 #include <asm/arch/crm_regs.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/sys_proto.h>
+#ifdef CONFIG_FSL_ESDHC
+#include <fsl_esdhc.h>
+#endif
 #include <netdev.h>
 
 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
@@ -458,7 +461,6 @@ int print_cpuinfo(void)
  * Initializes on-chip ethernet controllers.
  * to override, implement board_eth_init()
  */
-
 int cpu_eth_init(bd_t *bis)
 {
 	int rc = -ENODEV;
@@ -470,6 +472,17 @@ int cpu_eth_init(bd_t *bis)
 	return rc;
 }
 
+#ifdef CONFIG_FSL_ESDHC
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()

arch/arm/cpu/arm1136/mx35/generic.c int cpu_eth_init(bd_t *bis) · line 488

Quoted 10 lines
arch/arm/cpu/arm1136/mx35/generic.c +7 -0
+ */
+int cpu_mmc_init(bd_t *bis)
+{
+	return fsl_esdhc_mmc_init(bis);
+}
+#endif
+
 int get_clocks(void)
 {
 #ifdef CONFIG_FSL_ESDHC

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#28 lore raw

PATCH v2 7/7 mx35: Add cpu_mmc_init()

In reply to Benoît Thébaudeau
Quoted 42 lines · Beno?t Th?baudeau

Add cpu_mmc_init() function to make it easy to init a single eSDHC instance.

---
Changes for v2:
- Do not define cpu_mmc_init() if CONFIG_FSL_ESDHC is not defined.

 .../arch/arm/cpu/arm1136/mx35/generic.c            |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
arch/arm/cpu/arm1136/mx35/generic.c +7 -1
index 15a0098..8f61069 100644
@@ -31,6 +31,9 @@
 #include <asm/arch/crm_regs.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/sys_proto.h>
+#ifdef CONFIG_FSL_ESDHC
+#include <fsl_esdhc.h>
+#endif
 #include <netdev.h>
 
 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
@@ -458,7 +461,6 @@ int print_cpuinfo(void)
  * Initializes on-chip ethernet controllers.
  * to override, implement board_eth_init()
  */
-
 int cpu_eth_init(bd_t *bis)
 {
 	int rc = -ENODEV;
@@ -470,6 +472,17 @@ int cpu_eth_init(bd_t *bis)
 	return rc;
 }
 
+#ifdef CONFIG_FSL_ESDHC
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()

arch/arm/cpu/arm1136/mx35/generic.c int cpu_eth_init(bd_t *bis) · line 488

Quoted 10 lines
arch/arm/cpu/arm1136/mx35/generic.c +7 -0
+ */
+int cpu_mmc_init(bd_t *bis)
+{
+	return fsl_esdhc_mmc_init(bis);
+}
+#endif
+
 int get_clocks(void)
 {
 #ifdef CONFIG_FSL_ESDHC

Applied to u-boot-imx, thanks.

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#29 lore raw

PATCH 1/7 mx35: Move clock enums to clock.h

In reply to Benoît Thébaudeau
Quoted 104 lines · Beno?t Th?baudeau
---
 .../arch/arm/cpu/arm1136/mx35/generic.c            |    4 +--
 .../arch/arm/include/asm/arch-mx35/clock.h         |   28 +++++++++++++++++++-
 .../arch/arm/include/asm/arch-mx35/imx-regs.h      |   26 ------------------
 3 files changed, 29 insertions(+), 29 deletions(-)
arch/arm/cpu/arm1136/mx35/generic.c +2 -2
index 986b1f9..dba4903 100644
@@ -205,7 +205,7 @@ u32 imx_get_uartclk(void)
 	return freq;
 }
 
-unsigned int mxc_get_main_clock(enum mxc_main_clocks clk)
+unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 {
 	u32 nfc_pdf, hsp_podf;
 	u32 pll, ret_val = 0, usb_prdf, usb_podf;
@@ -270,7 +270,7 @@ unsigned int mxc_get_main_clock(enum mxc_main_clocks clk)
 
 	return ret_val;
 }
-unsigned int mxc_get_peri_clock(enum mxc_peri_clocks clk)
+unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 {
 	u32 ret_val = 0, pdf, pre_pdf, clk_sel;
 	struct ccm_regs *ccm =
arch/arm/include/asm/arch-mx35/clock.h +27 -1
index 4c0ddfd..5dc53ba 100644
@@ -25,7 +25,7 @@
 #define __ASM_ARCH_CLOCK_H
 
 enum mxc_clock {
-	MXC_ARM_CLK = 0,
+	MXC_ARM_CLK,
 	MXC_AHB_CLK,
 	MXC_IPG_CLK,
 	MXC_IPG_PERCLK,
@@ -36,6 +36,32 @@ enum mxc_clock {
 	MXC_FEC_CLK,
 };
 
+enum mxc_main_clock {
+	CPU_CLK,
+	AHB_CLK,
+	IPG_CLK,
+	IPG_PER_CLK,
+	NFC_CLK,
+	USB_CLK,
+	HSP_CLK,
+};
+
+enum mxc_peri_clock {
+	UART1_BAUD,
+	UART2_BAUD,
+	UART3_BAUD,
+	SSI1_BAUD,
+	SSI2_BAUD,
+	CSI_BAUD,
+	MSHC_CLK,
+	ESDHC1_CLK,
+	ESDHC2_CLK,
+	ESDHC3_CLK,
+	SPDIF_CLK,
+	SPI1_CLK,
+	SPI2_CLK,
+};
+
 unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref);
 
 u32 imx_get_uartclk(void);
arch/arm/include/asm/arch-mx35/imx-regs.h +0 -19
index 3146006..fba29b2 100644
@@ -216,32 +216,6 @@
 #if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__))
 #include <asm/types.h>
 
-enum mxc_main_clocks {
-	CPU_CLK,
-	AHB_CLK,
-	IPG_CLK,
-	IPG_PER_CLK,
-	NFC_CLK,
-	USB_CLK,
-	HSP_CLK,
-};
-
-enum mxc_peri_clocks {
-	UART1_BAUD,
-	UART2_BAUD,
-	UART3_BAUD,
-	SSI1_BAUD,
-	SSI2_BAUD,
-	CSI_BAUD,
-	MSHC_CLK,
-	ESDHC1_CLK,

arch/arm/include/asm/arch-mx35/imx-regs.h line 221

Quoted 10 lines
arch/arm/include/asm/arch-mx35/imx-regs.h +0 -7
-	ESDHC2_CLK,
-	ESDHC3_CLK,
-	SPDIF_CLK,
-	SPI1_CLK,
-	SPI2_CLK,
-};
-
 /* Clock Control Module (CCM) registers */
 struct ccm_regs {
 	u32 ccmr;	/* Control */

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================
#30 lore raw

PATCH 1/7 mx35: Move clock enums to clock.h

In reply to Benoît Thébaudeau
Quoted 3 lines · Beno?t Th?baudeau

---

Applied to u-boot-imx, thanks.

Best regards,
Stefano Babic

Signature · 5 lines
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================