2 * SPEAr6xx machines clock framework source file
4 * Copyright (C) 2012 ST Microelectronics
5 * Viresh Kumar <viresh.linux@gmail.com>
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.
12 #include <linux/clk.h>
13 #include <linux/clkdev.h>
15 #include <linux/spinlock_types.h>
18 static DEFINE_SPINLOCK(_lock);
20 #define PLL1_CTR (misc_base + 0x008)
21 #define PLL1_FRQ (misc_base + 0x00C)
22 #define PLL2_CTR (misc_base + 0x014)
23 #define PLL2_FRQ (misc_base + 0x018)
24 #define PLL_CLK_CFG (misc_base + 0x020)
25 /* PLL_CLK_CFG register masks */
26 #define MCTR_CLK_SHIFT 28
27 #define MCTR_CLK_MASK 3
29 #define CORE_CLK_CFG (misc_base + 0x024)
30 /* CORE CLK CFG register masks */
31 #define HCLK_RATIO_SHIFT 10
32 #define HCLK_RATIO_MASK 2
33 #define PCLK_RATIO_SHIFT 8
34 #define PCLK_RATIO_MASK 2
36 #define PERIP_CLK_CFG (misc_base + 0x028)
37 /* PERIP_CLK_CFG register masks */
38 #define CLCD_CLK_SHIFT 2
39 #define CLCD_CLK_MASK 2
40 #define UART_CLK_SHIFT 4
41 #define UART_CLK_MASK 1
42 #define FIRDA_CLK_SHIFT 5
43 #define FIRDA_CLK_MASK 2
44 #define GPT0_CLK_SHIFT 8
45 #define GPT1_CLK_SHIFT 10
46 #define GPT2_CLK_SHIFT 11
47 #define GPT3_CLK_SHIFT 12
48 #define GPT_CLK_MASK 1
50 #define PERIP1_CLK_ENB (misc_base + 0x02C)
51 /* PERIP1_CLK_ENB register masks */
52 #define UART0_CLK_ENB 3
53 #define UART1_CLK_ENB 4
54 #define SSP0_CLK_ENB 5
55 #define SSP1_CLK_ENB 6
57 #define JPEG_CLK_ENB 8
58 #define FSMC_CLK_ENB 9
59 #define FIRDA_CLK_ENB 10
60 #define GPT2_CLK_ENB 11
61 #define GPT3_CLK_ENB 12
62 #define GPIO2_CLK_ENB 13
63 #define SSP2_CLK_ENB 14
64 #define ADC_CLK_ENB 15
65 #define GPT1_CLK_ENB 11
66 #define RTC_CLK_ENB 17
67 #define GPIO1_CLK_ENB 18
68 #define DMA_CLK_ENB 19
69 #define SMI_CLK_ENB 21
70 #define CLCD_CLK_ENB 22
71 #define GMAC_CLK_ENB 23
72 #define USBD_CLK_ENB 24
73 #define USBH0_CLK_ENB 25
74 #define USBH1_CLK_ENB 26
76 #define PRSC0_CLK_CFG (misc_base + 0x044)
77 #define PRSC1_CLK_CFG (misc_base + 0x048)
78 #define PRSC2_CLK_CFG (misc_base + 0x04C)
80 #define CLCD_CLK_SYNT (misc_base + 0x05C)
81 #define FIRDA_CLK_SYNT (misc_base + 0x060)
82 #define UART_CLK_SYNT (misc_base + 0x064)
84 /* vco rate configuration table, in ascending order of rates */
85 static struct pll_rate_tbl pll_rtbl[] = {
86 {.mode = 0, .m = 0x53, .n = 0x0F, .p = 0x1}, /* vco 332 & pll 166 MHz */
87 {.mode = 0, .m = 0x85, .n = 0x0F, .p = 0x1}, /* vco 532 & pll 266 MHz */
88 {.mode = 0, .m = 0xA6, .n = 0x0F, .p = 0x1}, /* vco 664 & pll 332 MHz */
91 /* aux rate configuration table, in ascending order of rates */
92 static struct aux_rate_tbl aux_rtbl[] = {
93 /* For PLL1 = 332 MHz */
94 {.xscale = 2, .yscale = 27, .eq = 0}, /* 12.296 MHz */
95 {.xscale = 2, .yscale = 8, .eq = 0}, /* 41.5 MHz */
96 {.xscale = 2, .yscale = 4, .eq = 0}, /* 83 MHz */
97 {.xscale = 1, .yscale = 2, .eq = 1}, /* 166 MHz */
100 static const char *clcd_parents[] = { "pll3_clk", "clcd_syn_gclk", };
101 static const char *firda_parents[] = { "pll3_clk", "firda_syn_gclk", };
102 static const char *uart_parents[] = { "pll3_clk", "uart_syn_gclk", };
103 static const char *gpt0_1_parents[] = { "pll3_clk", "gpt0_1_syn_clk", };
104 static const char *gpt2_parents[] = { "pll3_clk", "gpt2_syn_clk", };
105 static const char *gpt3_parents[] = { "pll3_clk", "gpt3_syn_clk", };
106 static const char *ddr_parents[] = { "ahb_clk", "ahbmult2_clk", "none",
109 /* gpt rate configuration table, in ascending order of rates */
110 static struct gpt_rate_tbl gpt_rtbl[] = {
111 /* For pll1 = 332 MHz */
112 {.mscale = 4, .nscale = 0}, /* 41.5 MHz */
113 {.mscale = 2, .nscale = 0}, /* 55.3 MHz */
114 {.mscale = 1, .nscale = 0}, /* 83 MHz */
117 void __init spear6xx_clk_init(void __iomem *misc_base)
119 struct clk *clk, *clk1;
121 clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, CLK_IS_ROOT,
123 clk_register_clkdev(clk, "osc_32k_clk", NULL);
125 clk = clk_register_fixed_rate(NULL, "osc_30m_clk", NULL, CLK_IS_ROOT,
127 clk_register_clkdev(clk, "osc_30m_clk", NULL);
129 /* clock derived from 32 KHz osc clk */
130 clk = clk_register_gate(NULL, "rtc_spear", "osc_32k_clk", 0,
131 PERIP1_CLK_ENB, RTC_CLK_ENB, 0, &_lock);
132 clk_register_clkdev(clk, NULL, "rtc-spear");
134 /* clock derived from 30 MHz osc clk */
135 clk = clk_register_fixed_rate(NULL, "pll3_clk", "osc_24m_clk", 0,
137 clk_register_clkdev(clk, "pll3_clk", NULL);
139 clk = clk_register_vco_pll("vco1_clk", "pll1_clk", NULL, "osc_30m_clk",
140 0, PLL1_CTR, PLL1_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl),
141 &_lock, &clk1, NULL);
142 clk_register_clkdev(clk, "vco1_clk", NULL);
143 clk_register_clkdev(clk1, "pll1_clk", NULL);
145 clk = clk_register_vco_pll("vco2_clk", "pll2_clk", NULL, "osc_30m_clk",
146 0, PLL2_CTR, PLL2_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl),
147 &_lock, &clk1, NULL);
148 clk_register_clkdev(clk, "vco2_clk", NULL);
149 clk_register_clkdev(clk1, "pll2_clk", NULL);
151 clk = clk_register_fixed_factor(NULL, "wdt_clk", "osc_30m_clk", 0, 1,
153 clk_register_clkdev(clk, NULL, "wdt");
155 /* clock derived from pll1 clk */
156 clk = clk_register_fixed_factor(NULL, "cpu_clk", "pll1_clk",
157 CLK_SET_RATE_PARENT, 1, 1);
158 clk_register_clkdev(clk, "cpu_clk", NULL);
160 clk = clk_register_divider(NULL, "ahb_clk", "pll1_clk",
161 CLK_SET_RATE_PARENT, CORE_CLK_CFG, HCLK_RATIO_SHIFT,
162 HCLK_RATIO_MASK, 0, &_lock);
163 clk_register_clkdev(clk, "ahb_clk", NULL);
165 clk = clk_register_aux("uart_syn_clk", "uart_syn_gclk", "pll1_clk", 0,
166 UART_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
168 clk_register_clkdev(clk, "uart_syn_clk", NULL);
169 clk_register_clkdev(clk1, "uart_syn_gclk", NULL);
171 clk = clk_register_mux(NULL, "uart_mclk", uart_parents,
172 ARRAY_SIZE(uart_parents), 0, PERIP_CLK_CFG,
173 UART_CLK_SHIFT, UART_CLK_MASK, 0, &_lock);
174 clk_register_clkdev(clk, "uart_mclk", NULL);
176 clk = clk_register_gate(NULL, "uart0", "uart_mclk", 0, PERIP1_CLK_ENB,
177 UART0_CLK_ENB, 0, &_lock);
178 clk_register_clkdev(clk, NULL, "d0000000.serial");
180 clk = clk_register_gate(NULL, "uart1", "uart_mclk", 0, PERIP1_CLK_ENB,
181 UART1_CLK_ENB, 0, &_lock);
182 clk_register_clkdev(clk, NULL, "d0080000.serial");
184 clk = clk_register_aux("firda_syn_clk", "firda_syn_gclk", "pll1_clk",
185 0, FIRDA_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
187 clk_register_clkdev(clk, "firda_syn_clk", NULL);
188 clk_register_clkdev(clk1, "firda_syn_gclk", NULL);
190 clk = clk_register_mux(NULL, "firda_mclk", firda_parents,
191 ARRAY_SIZE(firda_parents), 0, PERIP_CLK_CFG,
192 FIRDA_CLK_SHIFT, FIRDA_CLK_MASK, 0, &_lock);
193 clk_register_clkdev(clk, "firda_mclk", NULL);
195 clk = clk_register_gate(NULL, "firda_clk", "firda_mclk", 0,
196 PERIP1_CLK_ENB, FIRDA_CLK_ENB, 0, &_lock);
197 clk_register_clkdev(clk, NULL, "firda");
199 clk = clk_register_aux("clcd_syn_clk", "clcd_syn_gclk", "pll1_clk",
200 0, CLCD_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
202 clk_register_clkdev(clk, "clcd_syn_clk", NULL);
203 clk_register_clkdev(clk1, "clcd_syn_gclk", NULL);
205 clk = clk_register_mux(NULL, "clcd_mclk", clcd_parents,
206 ARRAY_SIZE(clcd_parents), 0, PERIP_CLK_CFG,
207 CLCD_CLK_SHIFT, CLCD_CLK_MASK, 0, &_lock);
208 clk_register_clkdev(clk, "clcd_mclk", NULL);
210 clk = clk_register_gate(NULL, "clcd_clk", "clcd_mclk", 0,
211 PERIP1_CLK_ENB, CLCD_CLK_ENB, 0, &_lock);
212 clk_register_clkdev(clk, NULL, "clcd");
215 clk = clk_register_gpt("gpt0_1_syn_clk", "pll1_clk", 0, PRSC0_CLK_CFG,
216 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
217 clk_register_clkdev(clk, "gpt0_1_syn_clk", NULL);
219 clk = clk_register_mux(NULL, "gpt0_mclk", gpt0_1_parents,
220 ARRAY_SIZE(gpt0_1_parents), 0, PERIP_CLK_CFG,
221 GPT0_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
222 clk_register_clkdev(clk, NULL, "gpt0");
224 clk = clk_register_mux(NULL, "gpt1_mclk", gpt0_1_parents,
225 ARRAY_SIZE(gpt0_1_parents), 0, PERIP_CLK_CFG,
226 GPT1_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
227 clk_register_clkdev(clk, "gpt1_mclk", NULL);
229 clk = clk_register_gate(NULL, "gpt1_clk", "gpt1_mclk", 0,
230 PERIP1_CLK_ENB, GPT1_CLK_ENB, 0, &_lock);
231 clk_register_clkdev(clk, NULL, "gpt1");
233 clk = clk_register_gpt("gpt2_syn_clk", "pll1_clk", 0, PRSC1_CLK_CFG,
234 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
235 clk_register_clkdev(clk, "gpt2_syn_clk", NULL);
237 clk = clk_register_mux(NULL, "gpt2_mclk", gpt2_parents,
238 ARRAY_SIZE(gpt2_parents), 0, PERIP_CLK_CFG,
239 GPT2_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
240 clk_register_clkdev(clk, "gpt2_mclk", NULL);
242 clk = clk_register_gate(NULL, "gpt2_clk", "gpt2_mclk", 0,
243 PERIP1_CLK_ENB, GPT2_CLK_ENB, 0, &_lock);
244 clk_register_clkdev(clk, NULL, "gpt2");
246 clk = clk_register_gpt("gpt3_syn_clk", "pll1_clk", 0, PRSC2_CLK_CFG,
247 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
248 clk_register_clkdev(clk, "gpt3_syn_clk", NULL);
250 clk = clk_register_mux(NULL, "gpt3_mclk", gpt3_parents,
251 ARRAY_SIZE(gpt3_parents), 0, PERIP_CLK_CFG,
252 GPT3_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
253 clk_register_clkdev(clk, "gpt3_mclk", NULL);
255 clk = clk_register_gate(NULL, "gpt3_clk", "gpt3_mclk", 0,
256 PERIP1_CLK_ENB, GPT3_CLK_ENB, 0, &_lock);
257 clk_register_clkdev(clk, NULL, "gpt3");
259 /* clock derived from pll3 clk */
260 clk = clk_register_gate(NULL, "usbh0_clk", "pll3_clk", 0,
261 PERIP1_CLK_ENB, USBH0_CLK_ENB, 0, &_lock);
262 clk_register_clkdev(clk, NULL, "e1800000.ehci");
263 clk_register_clkdev(clk, NULL, "e1900000.ohci");
265 clk = clk_register_gate(NULL, "usbh1_clk", "pll3_clk", 0,
266 PERIP1_CLK_ENB, USBH1_CLK_ENB, 0, &_lock);
267 clk_register_clkdev(clk, NULL, "e2000000.ehci");
268 clk_register_clkdev(clk, NULL, "e2100000.ohci");
270 clk = clk_register_gate(NULL, "usbd_clk", "pll3_clk", 0, PERIP1_CLK_ENB,
271 USBD_CLK_ENB, 0, &_lock);
272 clk_register_clkdev(clk, NULL, "designware_udc");
274 /* clock derived from ahb clk */
275 clk = clk_register_fixed_factor(NULL, "ahbmult2_clk", "ahb_clk", 0, 2,
277 clk_register_clkdev(clk, "ahbmult2_clk", NULL);
279 clk = clk_register_mux(NULL, "ddr_clk", ddr_parents,
280 ARRAY_SIZE(ddr_parents), 0, PLL_CLK_CFG, MCTR_CLK_SHIFT,
281 MCTR_CLK_MASK, 0, &_lock);
282 clk_register_clkdev(clk, "ddr_clk", NULL);
284 clk = clk_register_divider(NULL, "apb_clk", "ahb_clk",
285 CLK_SET_RATE_PARENT, CORE_CLK_CFG, PCLK_RATIO_SHIFT,
286 PCLK_RATIO_MASK, 0, &_lock);
287 clk_register_clkdev(clk, "apb_clk", NULL);
289 clk = clk_register_gate(NULL, "dma_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
290 DMA_CLK_ENB, 0, &_lock);
291 clk_register_clkdev(clk, NULL, "fc400000.dma");
293 clk = clk_register_gate(NULL, "fsmc_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
294 FSMC_CLK_ENB, 0, &_lock);
295 clk_register_clkdev(clk, NULL, "d1800000.flash");
297 clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
298 GMAC_CLK_ENB, 0, &_lock);
299 clk_register_clkdev(clk, NULL, "e0800000.ethernet");
301 clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
302 I2C_CLK_ENB, 0, &_lock);
303 clk_register_clkdev(clk, NULL, "d0200000.i2c");
305 clk = clk_register_gate(NULL, "jpeg_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
306 JPEG_CLK_ENB, 0, &_lock);
307 clk_register_clkdev(clk, NULL, "jpeg");
309 clk = clk_register_gate(NULL, "smi_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
310 SMI_CLK_ENB, 0, &_lock);
311 clk_register_clkdev(clk, NULL, "fc000000.flash");
313 /* clock derived from apb clk */
314 clk = clk_register_gate(NULL, "adc_clk", "apb_clk", 0, PERIP1_CLK_ENB,
315 ADC_CLK_ENB, 0, &_lock);
316 clk_register_clkdev(clk, NULL, "adc");
318 clk = clk_register_fixed_factor(NULL, "gpio0_clk", "apb_clk", 0, 1, 1);
319 clk_register_clkdev(clk, NULL, "f0100000.gpio");
321 clk = clk_register_gate(NULL, "gpio1_clk", "apb_clk", 0, PERIP1_CLK_ENB,
322 GPIO1_CLK_ENB, 0, &_lock);
323 clk_register_clkdev(clk, NULL, "fc980000.gpio");
325 clk = clk_register_gate(NULL, "gpio2_clk", "apb_clk", 0, PERIP1_CLK_ENB,
326 GPIO2_CLK_ENB, 0, &_lock);
327 clk_register_clkdev(clk, NULL, "d8100000.gpio");
329 clk = clk_register_gate(NULL, "ssp0_clk", "apb_clk", 0, PERIP1_CLK_ENB,
330 SSP0_CLK_ENB, 0, &_lock);
331 clk_register_clkdev(clk, NULL, "ssp-pl022.0");
333 clk = clk_register_gate(NULL, "ssp1_clk", "apb_clk", 0, PERIP1_CLK_ENB,
334 SSP1_CLK_ENB, 0, &_lock);
335 clk_register_clkdev(clk, NULL, "ssp-pl022.1");
337 clk = clk_register_gate(NULL, "ssp2_clk", "apb_clk", 0, PERIP1_CLK_ENB,
338 SSP2_CLK_ENB, 0, &_lock);
339 clk_register_clkdev(clk, NULL, "ssp-pl022.2");