blob: c5e6118cba5da734219e1825960ec66f5448c6d8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <clock_legacy.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/arch/immap_ls102xa.h>
#include <asm/arch/clock.h>
#include <fsl_ifc.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS
#define CONFIG_SYS_FSL_NUM_CC_PLLS 2
#endif
void get_sys_info(struct sys_info *sys_info)
{
struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_LS1_CLK_ADDR);
unsigned int cpu;
const u8 core_cplx_pll[6] = {
[0] = 0, /* CC1 PPL / 1 */
[1] = 0, /* CC1 PPL / 2 */
[4] = 1, /* CC2 PPL / 1 */
[5] = 1, /* CC2 PPL / 2 */
};
const u8 core_cplx_pll_div[6] = {
[0] = 1, /* CC1 PPL / 1 */
[1] = 2, /* CC1 PPL / 2 */
[4] = 1, /* CC2 PPL / 1 */
[5] = 2, /* CC2 PPL / 2 */
};
uint i;
uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS];
uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS];
unsigned long sysclk = get_board_sys_clk();
sys_info->freq_systembus = sysclk;
#if defined(CONFIG_DYNAMIC_DDR_CLK_FREQ) || defined(CONFIG_STATIC_DDR_CLK_FREQ)
sys_info->freq_ddrbus = get_board_ddr_clk();
#else
sys_info->freq_ddrbus = sysclk;
#endif
sys_info->freq_systembus *= (in_be32(&gur->rcwsr[0]) >>
RCWSR0_SYS_PLL_RAT_SHIFT) & RCWSR0_SYS_PLL_RAT_MASK;
sys_info->freq_ddrbus *= (in_be32(&gur->rcwsr[0]) >>
RCWSR0_MEM_PLL_RAT_SHIFT) & RCWSR0_MEM_PLL_RAT_MASK;
for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) {
ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0x3f;
if (ratio[i] > 4)
freq_c_pll[i] = sysclk * ratio[i];
else
freq_c_pll[i] = sys_info->freq_systembus * ratio[i];
}
for (cpu = 0; cpu < CONFIG_MAX_CPUS; cpu++) {
u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27)
& 0xf;
u32 cplx_pll = core_cplx_pll[c_pll_sel];
sys_info->freq_processor[cpu] =
freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
}
#if defined(CONFIG_FSL_IFC)
sys_info->freq_localbus = sys_info->freq_systembus;
#endif
}
int get_clocks(void)
{
struct sys_info sys_info;
get_sys_info(&sys_info);
gd->cpu_clk = sys_info.freq_processor[0];
gd->bus_clk = sys_info.freq_systembus;
gd->mem_clk = sys_info.freq_ddrbus * 2;
#if defined(CONFIG_FSL_ESDHC)
gd->arch.sdhc_clk = gd->bus_clk;
#endif
return 0;
}
ulong get_bus_freq(ulong dummy)
{
return gd->bus_clk;
}
ulong get_ddr_freq(ulong dummy)
{
return gd->mem_clk;
}
int get_serial_clock(void)
{
return gd->bus_clk / 2;
}
unsigned int mxc_get_clock(enum mxc_clock clk)
{
switch (clk) {
case MXC_I2C_CLK:
return get_bus_freq(0) / 2;
case MXC_DSPI_CLK:
return get_bus_freq(0) / 2;
case MXC_UART_CLK:
return get_bus_freq(0) / 2;
default:
printf("Unsupported clock\n");
}
return 0;
}
|
