tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * pxa910 clock framework source file
3 *
4 * Copyright (C) 2012 Marvell
5 * Chao Xie <xiechao.mail@gmail.com>
6 *
7 * This file is licensed under the terms of the GNU General Public
8 * License version 2. This program is licensed "as is" without any
9 * warranty of any kind, whether express or implied.
10 */
11
12#include <linux/clk.h>
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/spinlock.h>
16#include <linux/io.h>
17#include <linux/delay.h>
18#include <linux/err.h>
19
20#include "clk.h"
21
22#define APBC_RTC 0x28
23#define APBC_TWSI0 0x2c
24#define APBC_KPC 0x18
25#define APBC_UART0 0x0
26#define APBC_UART1 0x4
27#define APBC_GPIO 0x8
28#define APBC_PWM0 0xc
29#define APBC_PWM1 0x10
30#define APBC_PWM2 0x14
31#define APBC_PWM3 0x18
32#define APBC_SSP0 0x1c
33#define APBC_SSP1 0x20
34#define APBC_SSP2 0x4c
35#define APBCP_TWSI1 0x28
36#define APBCP_UART2 0x1c
37#define APMU_SDH0 0x54
38#define APMU_SDH1 0x58
39#define APMU_USB 0x5c
40#define APMU_DISP0 0x4c
41#define APMU_CCIC0 0x50
42#define APMU_DFC 0x60
43#define MPMU_UART_PLL 0x14
44
45static DEFINE_SPINLOCK(clk_lock);
46
47static struct mmp_clk_factor_masks uart_factor_masks = {
48 .factor = 2,
49 .num_mask = 0x1fff,
50 .den_mask = 0x1fff,
51 .num_shift = 16,
52 .den_shift = 0,
53};
54
55static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
56 {.num = 8125, .den = 1536}, /*14.745MHZ */
57};
58
59static const char *uart_parent[] = {"pll1_3_16", "uart_pll"};
60static const char *ssp_parent[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};
61static const char *sdh_parent[] = {"pll1_12", "pll1_13"};
62static const char *disp_parent[] = {"pll1_2", "pll1_12"};
63static const char *ccic_parent[] = {"pll1_2", "pll1_12"};
64static const char *ccic_phy_parent[] = {"pll1_6", "pll1_12"};
65
66void __init pxa910_clk_init(phys_addr_t mpmu_phys, phys_addr_t apmu_phys,
67 phys_addr_t apbc_phys, phys_addr_t apbcp_phys)
68{
69 struct clk *clk;
70 struct clk *uart_pll;
71 void __iomem *mpmu_base;
72 void __iomem *apmu_base;
73 void __iomem *apbcp_base;
74 void __iomem *apbc_base;
75
76 mpmu_base = ioremap(mpmu_phys, SZ_4K);
77 if (!mpmu_base) {
78 pr_err("error to ioremap MPMU base\n");
79 return;
80 }
81
82 apmu_base = ioremap(apmu_phys, SZ_4K);
83 if (!apmu_base) {
84 pr_err("error to ioremap APMU base\n");
85 return;
86 }
87
88 apbcp_base = ioremap(apbcp_phys, SZ_4K);
89 if (!apbcp_base) {
90 pr_err("error to ioremap APBC extension base\n");
91 return;
92 }
93
94 apbc_base = ioremap(apbc_phys, SZ_4K);
95 if (!apbc_base) {
96 pr_err("error to ioremap APBC base\n");
97 return;
98 }
99
100 clk = clk_register_fixed_rate(NULL, "clk32", NULL, 0, 3200);
101 clk_register_clkdev(clk, "clk32", NULL);
102
103 clk = clk_register_fixed_rate(NULL, "vctcxo", NULL, 0, 26000000);
104 clk_register_clkdev(clk, "vctcxo", NULL);
105
106 clk = clk_register_fixed_rate(NULL, "pll1", NULL, 0, 624000000);
107 clk_register_clkdev(clk, "pll1", NULL);
108
109 clk = clk_register_fixed_factor(NULL, "pll1_2", "pll1",
110 CLK_SET_RATE_PARENT, 1, 2);
111 clk_register_clkdev(clk, "pll1_2", NULL);
112
113 clk = clk_register_fixed_factor(NULL, "pll1_4", "pll1_2",
114 CLK_SET_RATE_PARENT, 1, 2);
115 clk_register_clkdev(clk, "pll1_4", NULL);
116
117 clk = clk_register_fixed_factor(NULL, "pll1_8", "pll1_4",
118 CLK_SET_RATE_PARENT, 1, 2);
119 clk_register_clkdev(clk, "pll1_8", NULL);
120
121 clk = clk_register_fixed_factor(NULL, "pll1_16", "pll1_8",
122 CLK_SET_RATE_PARENT, 1, 2);
123 clk_register_clkdev(clk, "pll1_16", NULL);
124
125 clk = clk_register_fixed_factor(NULL, "pll1_6", "pll1_2",
126 CLK_SET_RATE_PARENT, 1, 3);
127 clk_register_clkdev(clk, "pll1_6", NULL);
128
129 clk = clk_register_fixed_factor(NULL, "pll1_12", "pll1_6",
130 CLK_SET_RATE_PARENT, 1, 2);
131 clk_register_clkdev(clk, "pll1_12", NULL);
132
133 clk = clk_register_fixed_factor(NULL, "pll1_24", "pll1_12",
134 CLK_SET_RATE_PARENT, 1, 2);
135 clk_register_clkdev(clk, "pll1_24", NULL);
136
137 clk = clk_register_fixed_factor(NULL, "pll1_48", "pll1_24",
138 CLK_SET_RATE_PARENT, 1, 2);
139 clk_register_clkdev(clk, "pll1_48", NULL);
140
141 clk = clk_register_fixed_factor(NULL, "pll1_96", "pll1_48",
142 CLK_SET_RATE_PARENT, 1, 2);
143 clk_register_clkdev(clk, "pll1_96", NULL);
144
145 clk = clk_register_fixed_factor(NULL, "pll1_13", "pll1",
146 CLK_SET_RATE_PARENT, 1, 13);
147 clk_register_clkdev(clk, "pll1_13", NULL);
148
149 clk = clk_register_fixed_factor(NULL, "pll1_13_1_5", "pll1",
150 CLK_SET_RATE_PARENT, 2, 3);
151 clk_register_clkdev(clk, "pll1_13_1_5", NULL);
152
153 clk = clk_register_fixed_factor(NULL, "pll1_2_1_5", "pll1",
154 CLK_SET_RATE_PARENT, 2, 3);
155 clk_register_clkdev(clk, "pll1_2_1_5", NULL);
156
157 clk = clk_register_fixed_factor(NULL, "pll1_3_16", "pll1",
158 CLK_SET_RATE_PARENT, 3, 16);
159 clk_register_clkdev(clk, "pll1_3_16", NULL);
160
161 uart_pll = mmp_clk_register_factor("uart_pll", "pll1_4", 0,
162 mpmu_base + MPMU_UART_PLL,
163 &uart_factor_masks, uart_factor_tbl,
164 ARRAY_SIZE(uart_factor_tbl), &clk_lock);
165 clk_set_rate(uart_pll, 14745600);
166 clk_register_clkdev(uart_pll, "uart_pll", NULL);
167
168 clk = mmp_clk_register_apbc("twsi0", "pll1_13_1_5",
169 apbc_base + APBC_TWSI0, 10, 0, &clk_lock);
170 clk_register_clkdev(clk, NULL, "pxa2xx-i2c.0");
171
172 clk = mmp_clk_register_apbc("twsi1", "pll1_13_1_5",
173 apbcp_base + APBCP_TWSI1, 10, 0, &clk_lock);
174 clk_register_clkdev(clk, NULL, "pxa2xx-i2c.1");
175
176 clk = mmp_clk_register_apbc("gpio", "vctcxo",
177 apbc_base + APBC_GPIO, 10, 0, &clk_lock);
178 clk_register_clkdev(clk, NULL, "mmp-gpio");
179
180 clk = mmp_clk_register_apbc("kpc", "clk32",
181 apbc_base + APBC_KPC, 10, 0, &clk_lock);
182 clk_register_clkdev(clk, NULL, "pxa27x-keypad");
183
184 clk = mmp_clk_register_apbc("rtc", "clk32",
185 apbc_base + APBC_RTC, 10, 0, &clk_lock);
186 clk_register_clkdev(clk, NULL, "sa1100-rtc");
187
188 clk = mmp_clk_register_apbc("pwm0", "pll1_48",
189 apbc_base + APBC_PWM0, 10, 0, &clk_lock);
190 clk_register_clkdev(clk, NULL, "pxa910-pwm.0");
191
192 clk = mmp_clk_register_apbc("pwm1", "pll1_48",
193 apbc_base + APBC_PWM1, 10, 0, &clk_lock);
194 clk_register_clkdev(clk, NULL, "pxa910-pwm.1");
195
196 clk = mmp_clk_register_apbc("pwm2", "pll1_48",
197 apbc_base + APBC_PWM2, 10, 0, &clk_lock);
198 clk_register_clkdev(clk, NULL, "pxa910-pwm.2");
199
200 clk = mmp_clk_register_apbc("pwm3", "pll1_48",
201 apbc_base + APBC_PWM3, 10, 0, &clk_lock);
202 clk_register_clkdev(clk, NULL, "pxa910-pwm.3");
203
204 clk = clk_register_mux(NULL, "uart0_mux", uart_parent,
205 ARRAY_SIZE(uart_parent),
206 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
207 apbc_base + APBC_UART0, 4, 3, 0, &clk_lock);
208 clk_set_parent(clk, uart_pll);
209 clk_register_clkdev(clk, "uart_mux.0", NULL);
210
211 clk = mmp_clk_register_apbc("uart0", "uart0_mux",
212 apbc_base + APBC_UART0, 10, 0, &clk_lock);
213 clk_register_clkdev(clk, NULL, "pxa2xx-uart.0");
214
215 clk = clk_register_mux(NULL, "uart1_mux", uart_parent,
216 ARRAY_SIZE(uart_parent),
217 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
218 apbc_base + APBC_UART1, 4, 3, 0, &clk_lock);
219 clk_set_parent(clk, uart_pll);
220 clk_register_clkdev(clk, "uart_mux.1", NULL);
221
222 clk = mmp_clk_register_apbc("uart1", "uart1_mux",
223 apbc_base + APBC_UART1, 10, 0, &clk_lock);
224 clk_register_clkdev(clk, NULL, "pxa2xx-uart.1");
225
226 clk = clk_register_mux(NULL, "uart2_mux", uart_parent,
227 ARRAY_SIZE(uart_parent),
228 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
229 apbcp_base + APBCP_UART2, 4, 3, 0, &clk_lock);
230 clk_set_parent(clk, uart_pll);
231 clk_register_clkdev(clk, "uart_mux.2", NULL);
232
233 clk = mmp_clk_register_apbc("uart2", "uart2_mux",
234 apbcp_base + APBCP_UART2, 10, 0, &clk_lock);
235 clk_register_clkdev(clk, NULL, "pxa2xx-uart.2");
236
237 clk = clk_register_mux(NULL, "ssp0_mux", ssp_parent,
238 ARRAY_SIZE(ssp_parent),
239 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
240 apbc_base + APBC_SSP0, 4, 3, 0, &clk_lock);
241 clk_register_clkdev(clk, "uart_mux.0", NULL);
242
243 clk = mmp_clk_register_apbc("ssp0", "ssp0_mux",
244 apbc_base + APBC_SSP0, 10, 0, &clk_lock);
245 clk_register_clkdev(clk, NULL, "mmp-ssp.0");
246
247 clk = clk_register_mux(NULL, "ssp1_mux", ssp_parent,
248 ARRAY_SIZE(ssp_parent),
249 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
250 apbc_base + APBC_SSP1, 4, 3, 0, &clk_lock);
251 clk_register_clkdev(clk, "ssp_mux.1", NULL);
252
253 clk = mmp_clk_register_apbc("ssp1", "ssp1_mux",
254 apbc_base + APBC_SSP1, 10, 0, &clk_lock);
255 clk_register_clkdev(clk, NULL, "mmp-ssp.1");
256
257 clk = mmp_clk_register_apmu("dfc", "pll1_4",
258 apmu_base + APMU_DFC, 0x19b, &clk_lock);
259 clk_register_clkdev(clk, NULL, "pxa3xx-nand.0");
260
261 clk = clk_register_mux(NULL, "sdh0_mux", sdh_parent,
262 ARRAY_SIZE(sdh_parent),
263 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
264 apmu_base + APMU_SDH0, 6, 1, 0, &clk_lock);
265 clk_register_clkdev(clk, "sdh0_mux", NULL);
266
267 clk = mmp_clk_register_apmu("sdh0", "sdh_mux",
268 apmu_base + APMU_SDH0, 0x1b, &clk_lock);
269 clk_register_clkdev(clk, NULL, "sdhci-pxa.0");
270
271 clk = clk_register_mux(NULL, "sdh1_mux", sdh_parent,
272 ARRAY_SIZE(sdh_parent),
273 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
274 apmu_base + APMU_SDH1, 6, 1, 0, &clk_lock);
275 clk_register_clkdev(clk, "sdh1_mux", NULL);
276
277 clk = mmp_clk_register_apmu("sdh1", "sdh1_mux",
278 apmu_base + APMU_SDH1, 0x1b, &clk_lock);
279 clk_register_clkdev(clk, NULL, "sdhci-pxa.1");
280
281 clk = mmp_clk_register_apmu("usb", "usb_pll",
282 apmu_base + APMU_USB, 0x9, &clk_lock);
283 clk_register_clkdev(clk, "usb_clk", NULL);
284
285 clk = mmp_clk_register_apmu("sph", "usb_pll",
286 apmu_base + APMU_USB, 0x12, &clk_lock);
287 clk_register_clkdev(clk, "sph_clk", NULL);
288
289 clk = clk_register_mux(NULL, "disp0_mux", disp_parent,
290 ARRAY_SIZE(disp_parent),
291 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
292 apmu_base + APMU_DISP0, 6, 1, 0, &clk_lock);
293 clk_register_clkdev(clk, "disp_mux.0", NULL);
294
295 clk = mmp_clk_register_apmu("disp0", "disp0_mux",
296 apmu_base + APMU_DISP0, 0x1b, &clk_lock);
297 clk_register_clkdev(clk, NULL, "mmp-disp.0");
298
299 clk = clk_register_mux(NULL, "ccic0_mux", ccic_parent,
300 ARRAY_SIZE(ccic_parent),
301 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
302 apmu_base + APMU_CCIC0, 6, 1, 0, &clk_lock);
303 clk_register_clkdev(clk, "ccic_mux.0", NULL);
304
305 clk = mmp_clk_register_apmu("ccic0", "ccic0_mux",
306 apmu_base + APMU_CCIC0, 0x1b, &clk_lock);
307 clk_register_clkdev(clk, "fnclk", "mmp-ccic.0");
308
309 clk = clk_register_mux(NULL, "ccic0_phy_mux", ccic_phy_parent,
310 ARRAY_SIZE(ccic_phy_parent),
311 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
312 apmu_base + APMU_CCIC0, 7, 1, 0, &clk_lock);
313 clk_register_clkdev(clk, "ccic_phy_mux.0", NULL);
314
315 clk = mmp_clk_register_apmu("ccic0_phy", "ccic0_phy_mux",
316 apmu_base + APMU_CCIC0, 0x24, &clk_lock);
317 clk_register_clkdev(clk, "phyclk", "mmp-ccic.0");
318
319 clk = clk_register_divider(NULL, "ccic0_sphy_div", "ccic0_mux",
320 CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC0,
321 10, 5, 0, &clk_lock);
322 clk_register_clkdev(clk, "sphyclk_div", NULL);
323
324 clk = mmp_clk_register_apmu("ccic0_sphy", "ccic0_sphy_div",
325 apmu_base + APMU_CCIC0, 0x300, &clk_lock);
326 clk_register_clkdev(clk, "sphyclk", "mmp-ccic.0");
327}