[U-Boot] [PATCH 5/7] mx35: Fix clock dividers
Benoît Thébaudeau
benoit.thebaudeau at advansee.com
Tue Aug 14 22:33:27 CEST 2012
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.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau at advansee.com>
Cc: Stefano Babic <sbabic at denx.de>
---
.../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(-)
diff --git u-boot-4d3c95f.orig/arch/arm/cpu/arm1136/mx35/generic.c u-boot-4d3c95f/arch/arm/cpu/arm1136/mx35/generic.c
index e369c86..4af052c 100644
--- u-boot-4d3c95f.orig/arch/arm/cpu/arm1136/mx35/generic.c
+++ u-boot-4d3c95f/arch/arm/cpu/arm1136/mx35/generic.c
@@ -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;
diff --git u-boot-4d3c95f.orig/arch/arm/include/asm/arch-mx35/crm_regs.h u-boot-4d3c95f/arch/arm/include/asm/arch-mx35/crm_regs.h
index 66bc1ba..f6b381b 100644
--- u-boot-4d3c95f.orig/arch/arm/include/asm/arch-mx35/crm_regs.h
+++ u-boot-4d3c95f/arch/arm/include/asm/arch-mx35/crm_regs.h
@@ -32,8 +32,8 @@
#define MXC_CCM_CCMR_VOL_RDY_CNT_MASK (0xF << 20)
#define MXC_CCM_CCMR_ROMW_OFFSET 18
#define MXC_CCM_CCMR_ROMW_MASK (0x3 << 18)
-#define MXC_CCM_CCMR_RAMW_OFFSET 21
-#define MXC_CCM_CCMR_RAMW_MASK (0x3 << 21)
+#define MXC_CCM_CCMR_RAMW_OFFSET 16
+#define MXC_CCM_CCMR_RAMW_MASK (0x3 << 16)
#define MXC_CCM_CCMR_LPM_OFFSET 14
#define MXC_CCM_CCMR_LPM_MASK (0x3 << 14)
#define MXC_CCM_CCMR_UPE (1 << 9)
@@ -47,7 +47,7 @@
#define MXC_CCM_PDR0_CON_MUX_DIV_MASK (0xF << 16)
#define MXC_CCM_PDR0_CKIL_SEL (1 << 15)
#define MXC_CCM_PDR0_PER_PODF_OFFSET 12
-#define MXC_CCM_PDR0_PER_PODF_MASK (0xF << 12)
+#define MXC_CCM_PDR0_PER_PODF_MASK (0x7 << 12)
#define MXC_CCM_PDR0_AUTO_MUX_DIV_OFFSET 9
#define MXC_CCM_PDR0_AUTO_MUX_DIV_MASK (0x7 << 9)
#define MXC_CCM_PDR0_AUTO_CON 0x1
@@ -62,10 +62,8 @@
#define MXC_CCM_PDR2_SSI2_PRDF_MASK (0x7 << 27)
#define MXC_CCM_PDR2_SSI1_PRDF_OFFSET 24
#define MXC_CCM_PDR2_SSI1_PRDF_MASK (0x7 << 24)
-#define MXC_CCM_PDR2_CSI_PRDF_OFFSET 19
-#define MXC_CCM_PDR2_CSI_PRDF_MASK (0x7 << 19)
#define MXC_CCM_PDR2_CSI_PODF_OFFSET 16
-#define MXC_CCM_PDR2_CSI_PODF_MASK (0x7 << 16)
+#define MXC_CCM_PDR2_CSI_PODF_MASK (0x3F << 16)
#define MXC_CCM_PDR2_SSI2_PODF_OFFSET 8
#define MXC_CCM_PDR2_SSI2_PODF_MASK (0x3F << 8)
#define MXC_CCM_PDR2_CSI_M_U (1 << 7)
@@ -78,35 +76,23 @@
#define MXC_CCM_PDR3_SPDIF_PODF_OFFSET 23
#define MXC_CCM_PDR3_SPDIF_PODF_MASK (0x3F << 23)
#define MXC_CCM_PDR3_SPDIF_M_U (1 << 22)
-#define MXC_CCM_PDR3_ESDHC3_PRDF_OFFSET 19
-#define MXC_CCM_PDR3_ESDHC3_PRDF_MASK (0x7 << 19)
#define MXC_CCM_PDR3_ESDHC3_PODF_OFFSET 16
-#define MXC_CCM_PDR3_ESDHC3_PODF_MASK (0x7 << 16)
-#define MXC_CCM_PDR3_UART_M_U (1 << 15)
-#define MXC_CCM_PDR3_ESDHC2_PRDF_OFFSET 11
-#define MXC_CCM_PDR3_ESDHC2_PRDF_MASK (0x7 << 11)
+#define MXC_CCM_PDR3_ESDHC3_PODF_MASK (0x3F << 16)
+#define MXC_CCM_PDR3_UART_M_U (1 << 14)
#define MXC_CCM_PDR3_ESDHC2_PODF_OFFSET 8
-#define MXC_CCM_PDR3_ESDHC2_PODF_MASK (0x7 << 8)
+#define MXC_CCM_PDR3_ESDHC2_PODF_MASK (0x3F << 8)
#define MXC_CCM_PDR3_ESDHC_M_U (1 << 6)
-#define MXC_CCM_PDR3_ESDHC1_PRDF_OFFSET 3
-#define MXC_CCM_PDR3_ESDHC1_PRDF_MASK (0x7 << 3)
#define MXC_CCM_PDR3_ESDHC1_PODF_OFFSET 0
-#define MXC_CCM_PDR3_ESDHC1_PODF_MASK (0x7)
+#define MXC_CCM_PDR3_ESDHC1_PODF_MASK (0x3F)
#define MXC_CCM_PDR4_NFC_PODF_OFFSET 28
#define MXC_CCM_PDR4_NFC_PODF_MASK (0xF << 28)
-#define MXC_CCM_PDR4_USB_PRDF_OFFSET 25
-#define MXC_CCM_PDR4_USB_PRDF_MASK (0x7 << 25)
#define MXC_CCM_PDR4_USB_PODF_OFFSET 22
-#define MXC_CCM_PDR4_USB_PODF_MASK (0x7 << 22)
-#define MXC_CCM_PDR4_PER0_PRDF_OFFSET 19
-#define MXC_CCM_PDR4_PER0_PRDF_MASK (0x7 << 19)
+#define MXC_CCM_PDR4_USB_PODF_MASK (0x3F << 22)
#define MXC_CCM_PDR4_PER0_PODF_OFFSET 16
-#define MXC_CCM_PDR4_PER0_PODF_MASK (0x7 << 16)
-#define MXC_CCM_PDR4_UART_PRDF_OFFSET 13
-#define MXC_CCM_PDR4_UART_PRDF_MASK (0x7 << 13)
+#define MXC_CCM_PDR4_PER0_PODF_MASK (0x3F << 16)
#define MXC_CCM_PDR4_UART_PODF_OFFSET 10
-#define MXC_CCM_PDR4_UART_PODF_MASK (0x7 << 10)
+#define MXC_CCM_PDR4_UART_PODF_MASK (0x3F << 10)
#define MXC_CCM_PDR4_USB_M_U (1 << 9)
/* Bit definitions for RCSR */
@@ -257,10 +243,8 @@
#define MXC_CCM_COSR_CLKOSEL_OFFSET 0
#define MXC_CCM_COSR_CLKOEN (1 << 5)
#define MXC_CCM_COSR_CLKOUTDIV_1 (1 << 6)
-#define MXC_CCM_COSR_CLKOUT_PREDIV_MASK (0x7 << 10)
-#define MXC_CCM_COSR_CLKOUT_PREDIV_OFFSET 10
-#define MXC_CCM_COSR_CLKOUT_PRODIV_MASK (0x7 << 13)
-#define MXC_CCM_COSR_CLKOUT_PRODIV_OFFSET 13
+#define MXC_CCM_COSR_CLKOUT_DIV_MASK (0x3F << 10)
+#define MXC_CCM_COSR_CLKOUT_DIV_OFFSET 10
#define MXC_CCM_COSR_SSI1_RX_SRC_SEL_MASK (0x3 << 16)
#define MXC_CCM_COSR_SSI1_RX_SRC_SEL_OFFSET 16
#define MXC_CCM_COSR_SSI1_TX_SRC_SEL_MASK (0x3 << 18)
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