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Diffstat (limited to 'arch/arm/cpu/arm1136/mx35/generic.c')
-rw-r--r--arch/arm/cpu/arm1136/mx35/generic.c90
1 files changed, 35 insertions, 55 deletions
diff --git a/arch/arm/cpu/arm1136/mx35/generic.c b/arch/arm/cpu/arm1136/mx35/generic.c
index d435e8af69..ef65176eed 100644
--- a/arch/arm/cpu/arm1136/mx35/generic.c
+++ b/arch/arm/cpu/arm1136/mx35/generic.c
@@ -24,6 +24,7 @@
*/
#include <common.h>
+#include <div64.h>
#include <asm/io.h>
#include <asm/errno.h>
#include <asm/arch/imx-regs.h>
@@ -129,15 +130,17 @@ 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)
@@ -146,9 +149,7 @@ static u32 get_mcu_main_clk(void)
struct ccm_regs *ccm =
(struct ccm_regs *)IMX_CCM_BASE;
arm_div = get_arm_div(readl(&ccm->pdr0), &fi, &fd);
- fi *=
- decode_pll(readl(&ccm->mpctl),
- CONFIG_MX35_HCLK_FREQ);
+ fi *= decode_pll(readl(&ccm->mpctl), MXC_HCLK);
return fi / (arm_div * fd);
}
@@ -171,17 +172,14 @@ 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;
}
@@ -193,25 +191,20 @@ u32 imx_get_uartclk(void)
(struct ccm_regs *)IMX_CCM_BASE;
u32 pdr4 = readl(&ccm->pdr4);
- if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U) {
+ if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U)
freq = get_mcu_main_clk();
- } else {
- 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,
+ else
+ freq = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
+ 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;
@@ -255,16 +248,13 @@ 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;
- if (reg4 & 0x200) {
+ usb_podf = (reg4 >> 22) & 0x3F;
+ if (reg4 & 0x200)
pll = get_mcu_main_clk();
- } else {
- pll = decode_pll(readl(&ccm->ppctl),
- CONFIG_MX35_HCLK_FREQ);
- }
+ else
+ pll = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
- ret_val = pll / ((usb_prdf + 1) * (usb_podf + 1));
+ ret_val = pll / (usb_podf + 1);
break;
default:
printf("Unknown clock: %d\n", clk);
@@ -287,18 +277,16 @@ 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));
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
break;
case SSI1_BAUD:
pre_pdf = (mpdr2 >> 24) & 0x7;
pdf = mpdr2 & 0x3F;
clk_sel = mpdr2 & (1 << 6);
ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
- decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
((pre_pdf + 1) * (pdf + 1));
break;
case SSI2_BAUD:
@@ -306,16 +294,14 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
pdf = (mpdr2 >> 8) & 0x3F;
clk_sel = mpdr2 & (1 << 6);
ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
- decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
((pre_pdf + 1) * (pdf + 1));
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));
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
break;
case MSHC_CLK:
pre_pdf = readl(&ccm->pdr1);
@@ -323,39 +309,33 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
pdf = (pre_pdf >> 22) & 0x3F;
pre_pdf = (pre_pdf >> 28) & 0x7;
ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
- decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
((pre_pdf + 1) * (pdf + 1));
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));
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (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));
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (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));
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
break;
case SPDIF_CLK:
clk_sel = mpdr3 & 0x400000;
pre_pdf = (mpdr3 >> 29) & 0x7;
pdf = (mpdr3 >> 23) & 0x3F;
ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
- decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+ decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
((pre_pdf + 1) * (pdf + 1));
break;
default:
generated by cgit (git 2.34.1) at 2024-12-24 12:42:53 +0000