blob: fd129566c1cef8329ddfa27d8b59ed886a8d22a0 [file] [log] [blame]
Thomas Petazzoni66ecbfe2014-04-22 23:26:08 +02001/*
2 * Marvell Orion SoC clocks
3 *
4 * Copyright (C) 2014 Thomas Petazzoni
5 *
6 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
7 *
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12
13#include <linux/kernel.h>
14#include <linux/clk-provider.h>
15#include <linux/io.h>
16#include <linux/of.h>
17#include "common.h"
18
19static const struct coreclk_ratio orion_coreclk_ratios[] __initconst = {
20 { .id = 0, .name = "ddrclk", }
21};
22
23/*
24 * Orion 5182
25 */
26
27#define SAR_MV88F5182_TCLK_FREQ 8
28#define SAR_MV88F5182_TCLK_FREQ_MASK 0x3
29
30static u32 __init mv88f5182_get_tclk_freq(void __iomem *sar)
31{
32 u32 opt = (readl(sar) >> SAR_MV88F5182_TCLK_FREQ) &
33 SAR_MV88F5182_TCLK_FREQ_MASK;
34 if (opt == 1)
35 return 150000000;
36 else if (opt == 2)
37 return 166666667;
38 else
39 return 0;
40}
41
42#define SAR_MV88F5182_CPU_FREQ 4
43#define SAR_MV88F5182_CPU_FREQ_MASK 0xf
44
45static u32 __init mv88f5182_get_cpu_freq(void __iomem *sar)
46{
47 u32 opt = (readl(sar) >> SAR_MV88F5182_CPU_FREQ) &
48 SAR_MV88F5182_CPU_FREQ_MASK;
49 if (opt == 0)
50 return 333333333;
51 else if (opt == 1 || opt == 2)
52 return 400000000;
53 else if (opt == 3)
54 return 500000000;
55 else
56 return 0;
57}
58
59static void __init mv88f5182_get_clk_ratio(void __iomem *sar, int id,
60 int *mult, int *div)
61{
62 u32 opt = (readl(sar) >> SAR_MV88F5182_CPU_FREQ) &
63 SAR_MV88F5182_CPU_FREQ_MASK;
64 if (opt == 0 || opt == 1) {
65 *mult = 1;
66 *div = 2;
67 } else if (opt == 2 || opt == 3) {
68 *mult = 1;
69 *div = 3;
70 } else {
71 *mult = 0;
72 *div = 1;
73 }
74}
75
76static const struct coreclk_soc_desc mv88f5182_coreclks = {
77 .get_tclk_freq = mv88f5182_get_tclk_freq,
78 .get_cpu_freq = mv88f5182_get_cpu_freq,
79 .get_clk_ratio = mv88f5182_get_clk_ratio,
80 .ratios = orion_coreclk_ratios,
81 .num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
82};
83
84static void __init mv88f5182_clk_init(struct device_node *np)
85{
86 return mvebu_coreclk_setup(np, &mv88f5182_coreclks);
87}
88
89CLK_OF_DECLARE(mv88f5182_clk, "marvell,mv88f5182-core-clock", mv88f5182_clk_init);
90
91/*
92 * Orion 5281
93 */
94
95static u32 __init mv88f5281_get_tclk_freq(void __iomem *sar)
96{
97 /* On 5281, tclk is always 166 Mhz */
98 return 166666667;
99}
100
101#define SAR_MV88F5281_CPU_FREQ 4
102#define SAR_MV88F5281_CPU_FREQ_MASK 0xf
103
104static u32 __init mv88f5281_get_cpu_freq(void __iomem *sar)
105{
106 u32 opt = (readl(sar) >> SAR_MV88F5281_CPU_FREQ) &
107 SAR_MV88F5281_CPU_FREQ_MASK;
108 if (opt == 1 || opt == 2)
109 return 400000000;
110 else if (opt == 3)
111 return 500000000;
112 else
113 return 0;
114}
115
116static void __init mv88f5281_get_clk_ratio(void __iomem *sar, int id,
117 int *mult, int *div)
118{
119 u32 opt = (readl(sar) >> SAR_MV88F5281_CPU_FREQ) &
120 SAR_MV88F5281_CPU_FREQ_MASK;
121 if (opt == 1) {
122 *mult = 1;
123 *div = 2;
124 } else if (opt == 2 || opt == 3) {
125 *mult = 1;
126 *div = 3;
127 } else {
128 *mult = 0;
129 *div = 1;
130 }
131}
132
133static const struct coreclk_soc_desc mv88f5281_coreclks = {
134 .get_tclk_freq = mv88f5281_get_tclk_freq,
135 .get_cpu_freq = mv88f5281_get_cpu_freq,
136 .get_clk_ratio = mv88f5281_get_clk_ratio,
137 .ratios = orion_coreclk_ratios,
138 .num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
139};
140
141static void __init mv88f5281_clk_init(struct device_node *np)
142{
143 return mvebu_coreclk_setup(np, &mv88f5281_coreclks);
144}
145
146CLK_OF_DECLARE(mv88f5281_clk, "marvell,mv88f5281-core-clock", mv88f5281_clk_init);
147
148/*
149 * Orion 6183
150 */
151
152#define SAR_MV88F6183_TCLK_FREQ 9
153#define SAR_MV88F6183_TCLK_FREQ_MASK 0x1
154
155static u32 __init mv88f6183_get_tclk_freq(void __iomem *sar)
156{
157 u32 opt = (readl(sar) >> SAR_MV88F6183_TCLK_FREQ) &
158 SAR_MV88F6183_TCLK_FREQ_MASK;
159 if (opt == 0)
160 return 133333333;
161 else if (opt == 1)
162 return 166666667;
163 else
164 return 0;
165}
166
167#define SAR_MV88F6183_CPU_FREQ 1
168#define SAR_MV88F6183_CPU_FREQ_MASK 0x3f
169
170static u32 __init mv88f6183_get_cpu_freq(void __iomem *sar)
171{
172 u32 opt = (readl(sar) >> SAR_MV88F6183_CPU_FREQ) &
173 SAR_MV88F6183_CPU_FREQ_MASK;
174 if (opt == 9)
175 return 333333333;
176 else if (opt == 17)
177 return 400000000;
178 else
179 return 0;
180}
181
182static void __init mv88f6183_get_clk_ratio(void __iomem *sar, int id,
183 int *mult, int *div)
184{
185 u32 opt = (readl(sar) >> SAR_MV88F6183_CPU_FREQ) &
186 SAR_MV88F6183_CPU_FREQ_MASK;
187 if (opt == 9 || opt == 17) {
188 *mult = 1;
189 *div = 2;
190 } else {
191 *mult = 0;
192 *div = 1;
193 }
194}
195
196static const struct coreclk_soc_desc mv88f6183_coreclks = {
197 .get_tclk_freq = mv88f6183_get_tclk_freq,
198 .get_cpu_freq = mv88f6183_get_cpu_freq,
199 .get_clk_ratio = mv88f6183_get_clk_ratio,
200 .ratios = orion_coreclk_ratios,
201 .num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
202};
203
204
205static void __init mv88f6183_clk_init(struct device_node *np)
206{
207 return mvebu_coreclk_setup(np, &mv88f6183_coreclks);
208}
209
210CLK_OF_DECLARE(mv88f6183_clk, "marvell,mv88f6183-core-clock", mv88f6183_clk_init);