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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* Keystone2: get clk rate for K2L
*
* (C) Copyright 2012-2014
* Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/clock_defs.h>
const struct keystone_pll_regs keystone_pll_regs[] = {
[CORE_PLL] = {KS2_MAINPLLCTL0, KS2_MAINPLLCTL1},
[PASS_PLL] = {KS2_PASSPLLCTL0, KS2_PASSPLLCTL1},
[TETRIS_PLL] = {KS2_ARMPLLCTL0, KS2_ARMPLLCTL1},
[DDR3_PLL] = {KS2_DDR3APLLCTL0, KS2_DDR3APLLCTL1},
};
int dev_speeds[] = {
SPD800,
SPD1000,
SPD1200,
SPD800,
SPD800,
SPD800,
SPD800,
SPD800,
SPD1200,
SPD1000,
SPD800,
SPD800,
SPD800,
};
int arm_speeds[] = {
SPD800,
SPD1000,
SPD1200,
SPD1350,
SPD1400,
SPD800,
SPD1400,
SPD1350,
SPD1200,
SPD1000,
SPD800,
SPD800,
SPD800,
};
/**
* pll_freq_get - get pll frequency
* Fout = Fref * NF(mult) / NR(prediv) / OD
* @pll: pll identifier
*/
static unsigned long pll_freq_get(int pll)
{
unsigned long mult = 1, prediv = 1, output_div = 2;
unsigned long ret;
u32 tmp, reg;
if (pll == CORE_PLL) {
ret = external_clk[sys_clk];
if (pllctl_reg_read(pll, ctl) & PLLCTL_PLLEN) {
/* PLL mode */
tmp = __raw_readl(KS2_MAINPLLCTL0);
prediv = (tmp & PLL_DIV_MASK) + 1;
mult = (((tmp & PLLM_MULT_HI_SMASK) >> 6) |
(pllctl_reg_read(pll, mult) &
PLLM_MULT_LO_MASK)) + 1;
output_div = ((pllctl_reg_read(pll, secctl) >>
PLL_CLKOD_SHIFT) & PLL_CLKOD_MASK) + 1;
ret = ret / prediv / output_div * mult;
}
} else {
switch (pll) {
case PASS_PLL:
ret = external_clk[pa_clk];
reg = KS2_PASSPLLCTL0;
break;
case TETRIS_PLL:
ret = external_clk[tetris_clk];
reg = KS2_ARMPLLCTL0;
break;
case DDR3_PLL:
ret = external_clk[ddr3_clk];
reg = KS2_DDR3APLLCTL0;
break;
default:
return 0;
}
tmp = __raw_readl(reg);
if (!(tmp & PLLCTL_BYPASS)) {
/* Bypass disabled */
prediv = (tmp & PLL_DIV_MASK) + 1;
mult = ((tmp >> PLL_MULT_SHIFT) & PLL_MULT_MASK) + 1;
output_div = ((tmp >> PLL_CLKOD_SHIFT) &
PLL_CLKOD_MASK) + 1;
ret = ((ret / prediv) * mult) / output_div;
}
}
return ret;
}
unsigned long clk_get_rate(unsigned int clk)
{
switch (clk) {
case core_pll_clk: return pll_freq_get(CORE_PLL);
case pass_pll_clk: return pll_freq_get(PASS_PLL);
case tetris_pll_clk: return pll_freq_get(TETRIS_PLL);
case ddr3_pll_clk: return pll_freq_get(DDR3_PLL);
case sys_clk0_1_clk:
case sys_clk0_clk: return pll_freq_get(CORE_PLL) / pll0div_read(1);
case sys_clk1_clk: return pll_freq_get(CORE_PLL) / pll0div_read(2);
case sys_clk2_clk: return pll_freq_get(CORE_PLL) / pll0div_read(3);
case sys_clk3_clk: return pll_freq_get(CORE_PLL) / pll0div_read(4);
case sys_clk0_2_clk: return clk_get_rate(sys_clk0_clk) / 2;
case sys_clk0_3_clk: return clk_get_rate(sys_clk0_clk) / 3;
case sys_clk0_4_clk: return clk_get_rate(sys_clk0_clk) / 4;
case sys_clk0_6_clk: return clk_get_rate(sys_clk0_clk) / 6;
case sys_clk0_8_clk: return clk_get_rate(sys_clk0_clk) / 8;
case sys_clk0_12_clk: return clk_get_rate(sys_clk0_clk) / 12;
case sys_clk0_24_clk: return clk_get_rate(sys_clk0_clk) / 24;
case sys_clk1_3_clk: return clk_get_rate(sys_clk1_clk) / 3;
case sys_clk1_4_clk: return clk_get_rate(sys_clk1_clk) / 4;
case sys_clk1_6_clk: return clk_get_rate(sys_clk1_clk) / 6;
case sys_clk1_12_clk: return clk_get_rate(sys_clk1_clk) / 12;
default:
break;
}
return 0;
}
|
