@@ -30,6 +30,7 @@ typedef struct cpld_data {
u8 serdes_mux; /* 0xc - Multiplexed pin Select Register */
u8 sw[1]; /* 0xd - SW2 Status */
u8 system_rst_default; /* 0xe - system reset to default register */
+ u8 sysclk_sw1; /* 0xf - sysclk configuration register */
} __attribute__ ((packed)) cpld_data_t;
#define SERDES_MUX_LANE_6_MASK 0x2
@@ -41,6 +42,8 @@ typedef struct cpld_data {
#define SERDES_MUX_LANE_D_MASK 0x8
#define SERDES_MUX_LANE_D_SHIFT 3
#define CPLD_SWITCH_BANK_ENABLE 0x40
+#define CPLD_SYSCLK_83 0x1 /* system clock 83.3MHz */
+#define CPLD_SYSCLK_100 0x2 /* system clock 100MHz */
/* Pointer to the CPLD register set */
#define cpld ((cpld_data_t *)CPLD_BASE)
@@ -129,6 +129,20 @@ int board_early_init_r(void)
return 0;
}
+unsigned long get_board_sys_clk(unsigned long dummy)
+{
+ u8 sysclk_conf = CPLD_READ(sysclk_sw1);
+
+ switch (sysclk_conf & 0x7) {
+ case CPLD_SYSCLK_83:
+ return 83333333;
+ case CPLD_SYSCLK_100:
+ return 100000000;
+ default:
+ return 66666666;
+ }
+}
+
static const char *serdes_clock_to_string(u32 clock)
{
switch (clock) {
@@ -102,7 +102,10 @@
#define CONFIG_ENV_SECT_SIZE 0x20000 /* 128K (one sector) */
#endif
-#define CONFIG_SYS_CLK_FREQ 66666666
+#ifndef __ASSEMBLY__
+unsigned long get_board_sys_clk(unsigned long dummy);
+#endif
+#define CONFIG_SYS_CLK_FREQ get_board_sys_clk(0)
/*
* These can be toggled for performance analysis, otherwise use default.
P2041RDB supports 3 sysclk frequencies, it's selected by SW1[6~8], software need to read the SW1 status to decide what the sysclk needs. SW1[8~6] : frequency 0 0 1 : 83.3MHz 0 1 0 : 100MHz others: 66.667MHz Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com> --- board/freescale/p2041rdb/cpld.h | 3 +++ board/freescale/p2041rdb/p2041rdb.c | 14 ++++++++++++++ include/configs/P2041RDB.h | 5 ++++- 3 files changed, 21 insertions(+), 1 deletions(-)