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authorJason Liu <r64343@freescale.com>2010-05-19 22:15:05 +0800
committerJason Liu <r64343@freescale.com>2010-05-19 22:23:42 +0800
commitaf46d9f54b192076c1e3096299d594e2783fc175 (patch)
tree6c5c61d313950c0ee0e004d9635baf403664b8dd
parenta0e1ec967f99d08ce0a48c45a509959453e5f3a7 (diff)
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ENGR00123630 Set ddr clk clock according to the board IDrel_imx_2.6.31_10.05.02imx_v2009.08_10.05.02
Set DDR clock to 400Mhz on MX53-EVK with DDR2 1GByte RevB Set DDR clock to 300Mhz on MX53-EVK with DDR2 2GByte RevA1 Remove the clock dump during boot, user can use clk command to get the clock information. Using help clk to get the command help Signed-off-by:Jason Liu <r64343@freescale.com>
-rw-r--r--board/freescale/mx53_evk/mx53_evk.c29
-rw-r--r--cpu/arm_cortexa8/mx53/generic.c29
2 files changed, 35 insertions, 23 deletions
diff --git a/board/freescale/mx53_evk/mx53_evk.c b/board/freescale/mx53_evk/mx53_evk.c
index 6be0b37..98d5938 100644
--- a/board/freescale/mx53_evk/mx53_evk.c
+++ b/board/freescale/mx53_evk/mx53_evk.c
@@ -44,6 +44,10 @@
#include <asm/arch/mmu.h>
#endif
+#ifdef CONFIG_CMD_CLOCK
+#include <asm/clock.h>
+#endif
+
DECLARE_GLOBAL_DATA_PTR;
static u32 system_rev;
@@ -415,6 +419,25 @@ static int __print_board_info(int id0, int id1)
return ret;
}
+static int _identify_board_fix_up(int id0, int id1)
+{
+ int ret = 0;
+
+#ifdef CONFIG_CMD_CLOCK
+ /* For EVK RevB, set DDR to 400MHz */
+ if (id0 == 21 && id1 == 15) {
+ ret = clk_config(CONFIG_REF_CLK_FREQ, 400, PERIPH_CLK);
+ if (ret < 0)
+ return ret;
+
+ ret = clk_config(CONFIG_REF_CLK_FREQ, 400, DDR_CLK);
+ if (ret < 0)
+ return ret;
+ }
+#endif
+ return ret;
+}
+
int identify_board_id(void)
{
int ret = 0;
@@ -440,6 +463,10 @@ int identify_board_id(void)
return ret;
ret = __print_board_info(bd_id0, bd_id1);
+ if (ret < 0)
+ return ret;
+
+ ret = _identify_board_fix_up(bd_id0, bd_id1);
return ret;
@@ -682,7 +709,7 @@ int board_late_init(void)
int checkboard(void)
{
- printf("Board: ");
+ printf("Board: ");
#ifdef CONFIG_I2C_MXC
identify_board_id();
diff --git a/cpu/arm_cortexa8/mx53/generic.c b/cpu/arm_cortexa8/mx53/generic.c
index 26a7894..791c0c3 100644
--- a/cpu/arm_cortexa8/mx53/generic.c
+++ b/cpu/arm_cortexa8/mx53/generic.c
@@ -641,8 +641,8 @@ int clk_info(u32 clk_type)
mxc_get_clock(MXC_DDR_CLK));
break;
case ALL_CLK:
- printf("cpu clock: %dHz\n",
- mxc_get_clock(MXC_ARM_CLK));
+ printf("cpu clock: %dMHz\n",
+ mxc_get_clock(MXC_ARM_CLK) / SZ_DEC_1M);
mxc_dump_clocks();
break;
default:
@@ -702,6 +702,8 @@ u32 calc_per_cbcdr_val(u32 per_clk, u32 cbcmr)
#define CHANGE_PLL_SETTINGS(base, pd, mfi, mfn, mfd) \
{ \
+ writel(0x1232, base + PLL_DP_CTL); \
+ writel(0x2, base + PLL_DP_CONFIG); \
writel(((pd - 1) << 0) | (mfi << 4), \
base + PLL_DP_OP); \
writel(mfn, base + PLL_DP_MFN); \
@@ -710,6 +712,9 @@ u32 calc_per_cbcdr_val(u32 per_clk, u32 cbcmr)
base + PLL_DP_HFS_OP); \
writel(mfn, base + PLL_DP_HFS_MFN); \
writel(mfd - 1, base + PLL_DP_HFS_MFD); \
+ writel(0x1232, base + PLL_DP_CTL); \
+ while (!readl(base + PLL_DP_CTL) & 0x1) \
+ ; \
}
int config_pll_clk(enum pll_clocks pll, struct pll_param *pll_param)
@@ -815,15 +820,6 @@ int config_periph_clk(u32 ref, u32 freq)
u32 old_cbcmr = readl(CCM_BASE_ADDR + CLKCTL_CBCMR);
u32 cbcdr = 0;
- /* Set PLL3 to 400MHz */
- ret = calc_pll_params(ref, 400000000, &pll_param);
- if (ret != 0) {
- printf("Can't find pll parameters: %d\n",
- ret);
- return ret;
- }
- config_pll_clk(PLL3_CLK, &pll_param);
-
/* Switch peripheral to PLL3 */
writel(0x00015154, CCM_BASE_ADDR + CLKCTL_CBCMR);
writel(0x02888945, CCM_BASE_ADDR + CLKCTL_CBCDR);
@@ -850,16 +846,6 @@ int config_periph_clk(u32 ref, u32 freq)
/* Make sure change is effective */
while (readl(CCM_BASE_ADDR + CLKCTL_CDHIPR) != 0)
;
-
- /* Switch PLL3's freq back */
- ret = calc_pll_params(ref, pll3_freq, &pll_param);
- if (ret != 0) {
- printf("Can't find pll parameters: %d\n",
- ret);
- return ret;
- }
- config_pll_clk(PLL3_CLK, &pll_param);
-
puts("\n");
}
@@ -974,7 +960,6 @@ int print_cpuinfo(void)
(get_board_rev() & 0xFF) >> 4,
(get_board_rev() & 0xF),
__get_mcu_main_clk() / 1000000);
- mxc_dump_clocks();
return 0;
}
#endif