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module: Convert symbol namespace to string literal
[linux.git] / drivers / clk / clk-stm32f4.c
blob07c13ebe327d5d3ea8c460fe8ff7cad4856b63db
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Author: Daniel Thompson <daniel.thompson@linaro.org>
4 *
5 * Inspired by clk-asm9260.c .
6 */
7
8 #include <linux/clk-provider.h>
9 #include <linux/err.h>
10 #include <linux/io.h>
11 #include <linux/iopoll.h>
12 #include <linux/ioport.h>
13 #include <linux/slab.h>
14 #include <linux/spinlock.h>
15 #include <linux/of.h>
16 #include <linux/of_address.h>
17 #include <linux/regmap.h>
18 #include <linux/mfd/syscon.h>
19
20 /*
21 * Include list of clocks wich are not derived from system clock (SYSCLOCK)
22 * The index of these clocks is the secondary index of DT bindings
23 *
24 */
25 #include <dt-bindings/clock/stm32fx-clock.h>
26
27 #define STM32F4_RCC_CR 0x00
28 #define STM32F4_RCC_PLLCFGR 0x04
29 #define STM32F4_RCC_CFGR 0x08
30 #define STM32F4_RCC_AHB1ENR 0x30
31 #define STM32F4_RCC_AHB2ENR 0x34
32 #define STM32F4_RCC_AHB3ENR 0x38
33 #define STM32F4_RCC_APB1ENR 0x40
34 #define STM32F4_RCC_APB2ENR 0x44
35 #define STM32F4_RCC_BDCR 0x70
36 #define STM32F4_RCC_CSR 0x74
37 #define STM32F4_RCC_PLLI2SCFGR 0x84
38 #define STM32F4_RCC_PLLSAICFGR 0x88
39 #define STM32F4_RCC_DCKCFGR 0x8c
40 #define STM32F7_RCC_DCKCFGR2 0x90
41
42 #define NONE -1
43 #define NO_IDX NONE
44 #define NO_MUX NONE
45 #define NO_GATE NONE
46
47 struct stm32f4_gate_data {
48 u8 offset;
49 u8 bit_idx;
50 const char *name;
51 const char *parent_name;
52 unsigned long flags;
53 };
54
55 static const struct stm32f4_gate_data stm32f429_gates[] __initconst = {
56 { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" },
57 { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" },
58 { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" },
59 { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" },
60 { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" },
61 { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" },
62 { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" },
63 { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" },
64 { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" },
65 { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" },
66 { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" },
67 { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" },
68 { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" },
69 { STM32F4_RCC_AHB1ENR, 20, "ccmdatam", "ahb_div" },
70 { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" },
71 { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" },
72 { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" },
73 { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" },
74 { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" },
75 { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" },
76 { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" },
77 { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" },
78 { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" },
79
80 { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" },
81 { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" },
82 { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" },
83 { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" },
84 { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" },
85
86 { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div",
87 CLK_IGNORE_UNUSED },
88
89 { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" },
90 { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" },
91 { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" },
92 { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" },
93 { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" },
94 { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" },
95 { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" },
96 { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" },
97 { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" },
98 { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" },
99 { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" },
100 { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" },
101 { STM32F4_RCC_APB1ENR, 17, "uart2", "apb1_div" },
102 { STM32F4_RCC_APB1ENR, 18, "uart3", "apb1_div" },
103 { STM32F4_RCC_APB1ENR, 19, "uart4", "apb1_div" },
104 { STM32F4_RCC_APB1ENR, 20, "uart5", "apb1_div" },
105 { STM32F4_RCC_APB1ENR, 21, "i2c1", "apb1_div" },
106 { STM32F4_RCC_APB1ENR, 22, "i2c2", "apb1_div" },
107 { STM32F4_RCC_APB1ENR, 23, "i2c3", "apb1_div" },
108 { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" },
109 { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" },
110 { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" },
111 { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" },
112 { STM32F4_RCC_APB1ENR, 30, "uart7", "apb1_div" },
113 { STM32F4_RCC_APB1ENR, 31, "uart8", "apb1_div" },
114
115 { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" },
116 { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" },
117 { STM32F4_RCC_APB2ENR, 4, "usart1", "apb2_div" },
118 { STM32F4_RCC_APB2ENR, 5, "usart6", "apb2_div" },
119 { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" },
120 { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" },
121 { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" },
122 { STM32F4_RCC_APB2ENR, 11, "sdio", "pll48" },
123 { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" },
124 { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" },
125 { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" },
126 { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" },
127 { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" },
128 { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" },
129 { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
130 { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
131 { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
132 };
133
134 static const struct stm32f4_gate_data stm32f469_gates[] __initconst = {
135 { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" },
136 { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" },
137 { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" },
138 { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" },
139 { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" },
140 { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" },
141 { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" },
142 { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" },
143 { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" },
144 { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" },
145 { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" },
146 { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" },
147 { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" },
148 { STM32F4_RCC_AHB1ENR, 20, "ccmdatam", "ahb_div" },
149 { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" },
150 { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" },
151 { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" },
152 { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" },
153 { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" },
154 { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" },
155 { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" },
156 { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" },
157 { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" },
158
159 { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" },
160 { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" },
161 { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" },
162 { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" },
163 { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" },
164
165 { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div",
166 CLK_IGNORE_UNUSED },
167 { STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div",
168 CLK_IGNORE_UNUSED },
169
170 { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" },
171 { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" },
172 { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" },
173 { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" },
174 { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" },
175 { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" },
176 { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" },
177 { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" },
178 { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" },
179 { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" },
180 { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" },
181 { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" },
182 { STM32F4_RCC_APB1ENR, 17, "uart2", "apb1_div" },
183 { STM32F4_RCC_APB1ENR, 18, "uart3", "apb1_div" },
184 { STM32F4_RCC_APB1ENR, 19, "uart4", "apb1_div" },
185 { STM32F4_RCC_APB1ENR, 20, "uart5", "apb1_div" },
186 { STM32F4_RCC_APB1ENR, 21, "i2c1", "apb1_div" },
187 { STM32F4_RCC_APB1ENR, 22, "i2c2", "apb1_div" },
188 { STM32F4_RCC_APB1ENR, 23, "i2c3", "apb1_div" },
189 { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" },
190 { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" },
191 { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" },
192 { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" },
193 { STM32F4_RCC_APB1ENR, 30, "uart7", "apb1_div" },
194 { STM32F4_RCC_APB1ENR, 31, "uart8", "apb1_div" },
195
196 { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" },
197 { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" },
198 { STM32F4_RCC_APB2ENR, 4, "usart1", "apb2_div" },
199 { STM32F4_RCC_APB2ENR, 5, "usart6", "apb2_div" },
200 { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" },
201 { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" },
202 { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" },
203 { STM32F4_RCC_APB2ENR, 11, "sdio", "sdmux" },
204 { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" },
205 { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" },
206 { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" },
207 { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" },
208 { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" },
209 { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" },
210 { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
211 { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
212 { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
213 };
214
215 static const struct stm32f4_gate_data stm32f746_gates[] __initconst = {
216 { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" },
217 { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" },
218 { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" },
219 { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" },
220 { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" },
221 { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" },
222 { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" },
223 { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" },
224 { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" },
225 { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" },
226 { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" },
227 { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" },
228 { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" },
229 { STM32F4_RCC_AHB1ENR, 20, "dtcmram", "ahb_div" },
230 { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" },
231 { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" },
232 { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" },
233 { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" },
234 { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" },
235 { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" },
236 { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" },
237 { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" },
238 { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" },
239
240 { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" },
241 { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" },
242 { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" },
243 { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" },
244 { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" },
245
246 { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div",
247 CLK_IGNORE_UNUSED },
248 { STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div",
249 CLK_IGNORE_UNUSED },
250
251 { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" },
252 { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" },
253 { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" },
254 { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" },
255 { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" },
256 { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" },
257 { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" },
258 { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" },
259 { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" },
260 { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" },
261 { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" },
262 { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" },
263 { STM32F4_RCC_APB1ENR, 16, "spdifrx", "apb1_div" },
264 { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" },
265 { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" },
266 { STM32F4_RCC_APB1ENR, 27, "cec", "apb1_div" },
267 { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" },
268 { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" },
269
270 { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" },
271 { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" },
272 { STM32F4_RCC_APB2ENR, 7, "sdmmc2", "sdmux" },
273 { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" },
274 { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" },
275 { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" },
276 { STM32F4_RCC_APB2ENR, 11, "sdmmc", "sdmux" },
277 { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" },
278 { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" },
279 { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" },
280 { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" },
281 { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" },
282 { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" },
283 { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
284 { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
285 { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
286 { STM32F4_RCC_APB2ENR, 23, "sai2", "apb2_div" },
287 };
288
289 static const struct stm32f4_gate_data stm32f769_gates[] __initconst = {
290 { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" },
291 { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" },
292 { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" },
293 { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" },
294 { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" },
295 { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" },
296 { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" },
297 { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" },
298 { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" },
299 { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" },
300 { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" },
301 { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" },
302 { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" },
303 { STM32F4_RCC_AHB1ENR, 20, "dtcmram", "ahb_div" },
304 { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" },
305 { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" },
306 { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" },
307 { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" },
308 { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" },
309 { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" },
310 { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" },
311 { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" },
312 { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" },
313
314 { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" },
315 { STM32F4_RCC_AHB2ENR, 1, "jpeg", "ahb_div" },
316 { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" },
317 { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" },
318 { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" },
319 { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" },
320
321 { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div",
322 CLK_IGNORE_UNUSED },
323 { STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div",
324 CLK_IGNORE_UNUSED },
325
326 { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" },
327 { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" },
328 { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" },
329 { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" },
330 { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" },
331 { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" },
332 { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" },
333 { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" },
334 { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" },
335 { STM32F4_RCC_APB1ENR, 10, "rtcapb", "apb1_mul" },
336 { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" },
337 { STM32F4_RCC_APB1ENR, 13, "can3", "apb1_div" },
338 { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" },
339 { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" },
340 { STM32F4_RCC_APB1ENR, 16, "spdifrx", "apb1_div" },
341 { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" },
342 { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" },
343 { STM32F4_RCC_APB1ENR, 27, "cec", "apb1_div" },
344 { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" },
345 { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" },
346
347 { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" },
348 { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" },
349 { STM32F4_RCC_APB2ENR, 7, "sdmmc2", "sdmux2" },
350 { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" },
351 { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" },
352 { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" },
353 { STM32F4_RCC_APB2ENR, 11, "sdmmc1", "sdmux1" },
354 { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" },
355 { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" },
356 { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" },
357 { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" },
358 { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" },
359 { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" },
360 { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
361 { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
362 { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
363 { STM32F4_RCC_APB2ENR, 23, "sai2", "apb2_div" },
364 { STM32F4_RCC_APB2ENR, 30, "mdio", "apb2_div" },
365 };
366
367 /*
368 * This bitmask tells us which bit offsets (0..192) on STM32F4[23]xxx
369 * have gate bits associated with them. Its combined hweight is 71.
370 */
371 #define MAX_GATE_MAP 3
372
373 static const u64 stm32f42xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull,
374 0x0000000000000001ull,
375 0x04777f33f6fec9ffull };
376
377 static const u64 stm32f46xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull,
378 0x0000000000000003ull,
379 0x0c777f33f6fec9ffull };
380
381 static const u64 stm32f746_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull,
382 0x0000000000000003ull,
383 0x04f77f833e01c9ffull };
384
385 static const u64 stm32f769_gate_map[MAX_GATE_MAP] = { 0x000000f37ef417ffull,
386 0x0000000000000003ull,
387 0x44F77F833E01EDFFull };
388
389 static const u64 *stm32f4_gate_map;
390
391 static struct clk_hw **clks;
392
393 static DEFINE_SPINLOCK(stm32f4_clk_lock);
394 static void __iomem *base;
395
396 static struct regmap *pdrm;
397
398 static int stm32fx_end_primary_clk;
399
400 /*
401 * "Multiplier" device for APBx clocks.
402 *
403 * The APBx dividers are power-of-two dividers and, if *not* running in 1:1
404 * mode, they also tap out the one of the low order state bits to run the
405 * timers. ST datasheets represent this feature as a (conditional) clock
406 * multiplier.
407 */
408 struct clk_apb_mul {
409 struct clk_hw hw;
410 u8 bit_idx;
411 };
412
413 #define to_clk_apb_mul(_hw) container_of(_hw, struct clk_apb_mul, hw)
414
415 static unsigned long clk_apb_mul_recalc_rate(struct clk_hw *hw,
416 unsigned long parent_rate)
417 {
418 struct clk_apb_mul *am = to_clk_apb_mul(hw);
419
420 if (readl(base + STM32F4_RCC_CFGR) & BIT(am->bit_idx))
421 return parent_rate * 2;
422
423 return parent_rate;
424 }
425
426 static long clk_apb_mul_round_rate(struct clk_hw *hw, unsigned long rate,
427 unsigned long *prate)
428 {
429 struct clk_apb_mul *am = to_clk_apb_mul(hw);
430 unsigned long mult = 1;
431
432 if (readl(base + STM32F4_RCC_CFGR) & BIT(am->bit_idx))
433 mult = 2;
434
435 if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
436 unsigned long best_parent = rate / mult;
437
438 *prate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent);
439 }
440
441 return *prate * mult;
442 }
443
444 static int clk_apb_mul_set_rate(struct clk_hw *hw, unsigned long rate,
445 unsigned long parent_rate)
446 {
447 /*
448 * We must report success but we can do so unconditionally because
449 * clk_apb_mul_round_rate returns values that ensure this call is a
450 * nop.
451 */
452
453 return 0;
454 }
455
456 static const struct clk_ops clk_apb_mul_factor_ops = {
457 .round_rate = clk_apb_mul_round_rate,
458 .set_rate = clk_apb_mul_set_rate,
459 .recalc_rate = clk_apb_mul_recalc_rate,
460 };
461
462 static struct clk *clk_register_apb_mul(struct device *dev, const char *name,
463 const char *parent_name,
464 unsigned long flags, u8 bit_idx)
465 {
466 struct clk_apb_mul *am;
467 struct clk_init_data init;
468 struct clk *clk;
469
470 am = kzalloc(sizeof(*am), GFP_KERNEL);
471 if (!am)
472 return ERR_PTR(-ENOMEM);
473
474 am->bit_idx = bit_idx;
475 am->hw.init = &init;
476
477 init.name = name;
478 init.ops = &clk_apb_mul_factor_ops;
479 init.flags = flags;
480 init.parent_names = &parent_name;
481 init.num_parents = 1;
482
483 clk = clk_register(dev, &am->hw);
484
485 if (IS_ERR(clk))
486 kfree(am);
487
488 return clk;
489 }
490
491 enum {
492 PLL,
493 PLL_I2S,
494 PLL_SAI,
495 };
496
497 static const struct clk_div_table pll_divp_table[] = {
498 { 0, 2 }, { 1, 4 }, { 2, 6 }, { 3, 8 }, { 0 }
499 };
500
501 static const struct clk_div_table pll_divq_table[] = {
502 { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 }, { 7, 7 },
503 { 8, 8 }, { 9, 9 }, { 10, 10 }, { 11, 11 }, { 12, 12 }, { 13, 13 },
504 { 14, 14 }, { 15, 15 },
505 { 0 }
506 };
507
508 static const struct clk_div_table pll_divr_table[] = {
509 { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 }, { 7, 7 }, { 0 }
510 };
511
512 struct stm32f4_pll {
513 spinlock_t *lock;
514 struct clk_gate gate;
515 u8 offset;
516 u8 bit_rdy_idx;
517 u8 status;
518 u8 n_start;
519 };
520
521 #define to_stm32f4_pll(_gate) container_of(_gate, struct stm32f4_pll, gate)
522
523 struct stm32f4_pll_post_div_data {
524 int idx;
525 int pll_idx;
526 const char *name;
527 const char *parent;
528 u8 flag;
529 u8 offset;
530 u8 shift;
531 u8 width;
532 u8 flag_div;
533 const struct clk_div_table *div_table;
534 };
535
536 struct stm32f4_vco_data {
537 const char *vco_name;
538 u8 offset;
539 u8 bit_idx;
540 u8 bit_rdy_idx;
541 };
542
543 static const struct stm32f4_vco_data vco_data[] = {
544 { "vco", STM32F4_RCC_PLLCFGR, 24, 25 },
545 { "vco-i2s", STM32F4_RCC_PLLI2SCFGR, 26, 27 },
546 { "vco-sai", STM32F4_RCC_PLLSAICFGR, 28, 29 },
547 };
548
549
550 static const struct clk_div_table post_divr_table[] = {
551 { 0, 2 }, { 1, 4 }, { 2, 8 }, { 3, 16 }, { 0 }
552 };
553
554 #define MAX_POST_DIV 3
555 static const struct stm32f4_pll_post_div_data post_div_data[MAX_POST_DIV] = {
556 { CLK_I2SQ_PDIV, PLL_VCO_I2S, "plli2s-q-div", "plli2s-q",
557 CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 0, 5, 0, NULL},
558
559 { CLK_SAIQ_PDIV, PLL_VCO_SAI, "pllsai-q-div", "pllsai-q",
560 CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 8, 5, 0, NULL },
561
562 { NO_IDX, PLL_VCO_SAI, "pllsai-r-div", "pllsai-r", CLK_SET_RATE_PARENT,
563 STM32F4_RCC_DCKCFGR, 16, 2, 0, post_divr_table },
564 };
565
566 struct stm32f4_div_data {
567 u8 shift;
568 u8 width;
569 u8 flag_div;
570 const struct clk_div_table *div_table;
571 };
572
573 #define MAX_PLL_DIV 3
574 static const struct stm32f4_div_data div_data[MAX_PLL_DIV] = {
575 { 16, 2, 0, pll_divp_table },
576 { 24, 4, 0, pll_divq_table },
577 { 28, 3, 0, pll_divr_table },
578 };
579
580 struct stm32f4_pll_data {
581 u8 pll_num;
582 u8 n_start;
583 const char *div_name[MAX_PLL_DIV];
584 };
585
586 static const struct stm32f4_pll_data stm32f429_pll[MAX_PLL_DIV] = {
587 { PLL, 192, { "pll", "pll48", NULL } },
588 { PLL_I2S, 192, { NULL, "plli2s-q", "plli2s-r" } },
589 { PLL_SAI, 49, { NULL, "pllsai-q", "pllsai-r" } },
590 };
591
592 static const struct stm32f4_pll_data stm32f469_pll[MAX_PLL_DIV] = {
593 { PLL, 50, { "pll", "pll-q", "pll-r" } },
594 { PLL_I2S, 50, { "plli2s-p", "plli2s-q", "plli2s-r" } },
595 { PLL_SAI, 50, { "pllsai-p", "pllsai-q", "pllsai-r" } },
596 };
597
598 static int stm32f4_pll_is_enabled(struct clk_hw *hw)
599 {
600 return clk_gate_ops.is_enabled(hw);
601 }
602
603 #define PLL_TIMEOUT 10000
604
605 static int stm32f4_pll_enable(struct clk_hw *hw)
606 {
607 struct clk_gate *gate = to_clk_gate(hw);
608 struct stm32f4_pll *pll = to_stm32f4_pll(gate);
609 int bit_status;
610 unsigned int timeout = PLL_TIMEOUT;
611
612 if (clk_gate_ops.is_enabled(hw))
613 return 0;
614
615 clk_gate_ops.enable(hw);
616
617 do {
618 bit_status = !(readl(gate->reg) & BIT(pll->bit_rdy_idx));
619
620 } while (bit_status && --timeout);
621
622 return bit_status;
623 }
624
625 static void stm32f4_pll_disable(struct clk_hw *hw)
626 {
627 clk_gate_ops.disable(hw);
628 }
629
630 static unsigned long stm32f4_pll_recalc(struct clk_hw *hw,
631 unsigned long parent_rate)
632 {
633 struct clk_gate *gate = to_clk_gate(hw);
634 struct stm32f4_pll *pll = to_stm32f4_pll(gate);
635 unsigned long n;
636
637 n = (readl(base + pll->offset) >> 6) & 0x1ff;
638
639 return parent_rate * n;
640 }
641
642 static long stm32f4_pll_round_rate(struct clk_hw *hw, unsigned long rate,
643 unsigned long *prate)
644 {
645 struct clk_gate *gate = to_clk_gate(hw);
646 struct stm32f4_pll *pll = to_stm32f4_pll(gate);
647 unsigned long n;
648
649 n = rate / *prate;
650
651 if (n < pll->n_start)
652 n = pll->n_start;
653 else if (n > 432)
654 n = 432;
655
656 return *prate * n;
657 }
658
659 static int stm32f4_pll_set_rate(struct clk_hw *hw, unsigned long rate,
660 unsigned long parent_rate)
661 {
662 struct clk_gate *gate = to_clk_gate(hw);
663 struct stm32f4_pll *pll = to_stm32f4_pll(gate);
664
665 unsigned long n;
666 unsigned long val;
667 int pll_state;
668
669 pll_state = stm32f4_pll_is_enabled(hw);
670
671 if (pll_state)
672 stm32f4_pll_disable(hw);
673
674 n = rate / parent_rate;
675
676 val = readl(base + pll->offset) & ~(0x1ff << 6);
677
678 writel(val | ((n & 0x1ff) << 6), base + pll->offset);
679
680 if (pll_state)
681 stm32f4_pll_enable(hw);
682
683 return 0;
684 }
685
686 static const struct clk_ops stm32f4_pll_gate_ops = {
687 .enable = stm32f4_pll_enable,
688 .disable = stm32f4_pll_disable,
689 .is_enabled = stm32f4_pll_is_enabled,
690 .recalc_rate = stm32f4_pll_recalc,
691 .round_rate = stm32f4_pll_round_rate,
692 .set_rate = stm32f4_pll_set_rate,
693 };
694
695 struct stm32f4_pll_div {
696 struct clk_divider div;
697 struct clk_hw *hw_pll;
698 };
699
700 #define to_pll_div_clk(_div) container_of(_div, struct stm32f4_pll_div, div)
701
702 static unsigned long stm32f4_pll_div_recalc_rate(struct clk_hw *hw,
703 unsigned long parent_rate)
704 {
705 return clk_divider_ops.recalc_rate(hw, parent_rate);
706 }
707
708 static int stm32f4_pll_div_determine_rate(struct clk_hw *hw,
709 struct clk_rate_request *req)
710 {
711 return clk_divider_ops.determine_rate(hw, req);
712 }
713
714 static int stm32f4_pll_div_set_rate(struct clk_hw *hw, unsigned long rate,
715 unsigned long parent_rate)
716 {
717 int pll_state, ret;
718
719 struct clk_divider *div = to_clk_divider(hw);
720 struct stm32f4_pll_div *pll_div = to_pll_div_clk(div);
721
722 pll_state = stm32f4_pll_is_enabled(pll_div->hw_pll);
723
724 if (pll_state)
725 stm32f4_pll_disable(pll_div->hw_pll);
726
727 ret = clk_divider_ops.set_rate(hw, rate, parent_rate);
728
729 if (pll_state)
730 stm32f4_pll_enable(pll_div->hw_pll);
731
732 return ret;
733 }
734
735 static const struct clk_ops stm32f4_pll_div_ops = {
736 .recalc_rate = stm32f4_pll_div_recalc_rate,
737 .determine_rate = stm32f4_pll_div_determine_rate,
738 .set_rate = stm32f4_pll_div_set_rate,
739 };
740
741 static struct clk_hw *clk_register_pll_div(const char *name,
742 const char *parent_name, unsigned long flags,
743 void __iomem *reg, u8 shift, u8 width,
744 u8 clk_divider_flags, const struct clk_div_table *table,
745 struct clk_hw *pll_hw, spinlock_t *lock)
746 {
747 struct stm32f4_pll_div *pll_div;
748 struct clk_hw *hw;
749 struct clk_init_data init;
750 int ret;
751
752 /* allocate the divider */
753 pll_div = kzalloc(sizeof(*pll_div), GFP_KERNEL);
754 if (!pll_div)
755 return ERR_PTR(-ENOMEM);
756
757 init.name = name;
758 init.ops = &stm32f4_pll_div_ops;
759 init.flags = flags;
760 init.parent_names = (parent_name ? &parent_name : NULL);
761 init.num_parents = (parent_name ? 1 : 0);
762
763 /* struct clk_divider assignments */
764 pll_div->div.reg = reg;
765 pll_div->div.shift = shift;
766 pll_div->div.width = width;
767 pll_div->div.flags = clk_divider_flags;
768 pll_div->div.lock = lock;
769 pll_div->div.table = table;
770 pll_div->div.hw.init = &init;
771
772 pll_div->hw_pll = pll_hw;
773
774 /* register the clock */
775 hw = &pll_div->div.hw;
776 ret = clk_hw_register(NULL, hw);
777 if (ret) {
778 kfree(pll_div);
779 hw = ERR_PTR(ret);
780 }
781
782 return hw;
783 }
784
785 static struct clk_hw *stm32f4_rcc_register_pll(const char *pllsrc,
786 const struct stm32f4_pll_data *data, spinlock_t *lock)
787 {
788 struct stm32f4_pll *pll;
789 struct clk_init_data init = { NULL };
790 void __iomem *reg;
791 struct clk_hw *pll_hw;
792 int ret;
793 int i;
794 const struct stm32f4_vco_data *vco;
795
796
797 pll = kzalloc(sizeof(*pll), GFP_KERNEL);
798 if (!pll)
799 return ERR_PTR(-ENOMEM);
800
801 vco = &vco_data[data->pll_num];
802
803 init.name = vco->vco_name;
804 init.ops = &stm32f4_pll_gate_ops;
805 init.flags = CLK_SET_RATE_GATE;
806 init.parent_names = &pllsrc;
807 init.num_parents = 1;
808
809 pll->gate.lock = lock;
810 pll->gate.reg = base + STM32F4_RCC_CR;
811 pll->gate.bit_idx = vco->bit_idx;
812 pll->gate.hw.init = &init;
813
814 pll->offset = vco->offset;
815 pll->n_start = data->n_start;
816 pll->bit_rdy_idx = vco->bit_rdy_idx;
817 pll->status = (readl(base + STM32F4_RCC_CR) >> vco->bit_idx) & 0x1;
818
819 reg = base + pll->offset;
820
821 pll_hw = &pll->gate.hw;
822 ret = clk_hw_register(NULL, pll_hw);
823 if (ret) {
824 kfree(pll);
825 return ERR_PTR(ret);
826 }
827
828 for (i = 0; i < MAX_PLL_DIV; i++)
829 if (data->div_name[i])
830 clk_register_pll_div(data->div_name[i],
831 vco->vco_name,
832 0,
833 reg,
834 div_data[i].shift,
835 div_data[i].width,
836 div_data[i].flag_div,
837 div_data[i].div_table,
838 pll_hw,
839 lock);
840 return pll_hw;
841 }
842
843 /*
844 * Converts the primary and secondary indices (as they appear in DT) to an
845 * offset into our struct clock array.
846 */
847 static int stm32f4_rcc_lookup_clk_idx(u8 primary, u8 secondary)
848 {
849 u64 table[MAX_GATE_MAP];
850
851 if (primary == 1) {
852 if (WARN_ON(secondary >= stm32fx_end_primary_clk))
853 return -EINVAL;
854 return secondary;
855 }
856
857 memcpy(table, stm32f4_gate_map, sizeof(table));
858
859 /* only bits set in table can be used as indices */
860 if (WARN_ON(secondary >= BITS_PER_BYTE * sizeof(table) ||
861 0 == (table[BIT_ULL_WORD(secondary)] &
862 BIT_ULL_MASK(secondary))))
863 return -EINVAL;
864
865 /* mask out bits above our current index */
866 table[BIT_ULL_WORD(secondary)] &=
867 GENMASK_ULL(secondary % BITS_PER_LONG_LONG, 0);
868
869 return stm32fx_end_primary_clk - 1 + hweight64(table[0]) +
870 (BIT_ULL_WORD(secondary) >= 1 ? hweight64(table[1]) : 0) +
871 (BIT_ULL_WORD(secondary) >= 2 ? hweight64(table[2]) : 0);
872 }
873
874 static struct clk_hw *
875 stm32f4_rcc_lookup_clk(struct of_phandle_args *clkspec, void *data)
876 {
877 int i = stm32f4_rcc_lookup_clk_idx(clkspec->args[0], clkspec->args[1]);
878
879 if (i < 0)
880 return ERR_PTR(-EINVAL);
881
882 return clks[i];
883 }
884
885 #define to_rgclk(_rgate) container_of(_rgate, struct stm32_rgate, gate)
886
887 static inline void disable_power_domain_write_protection(void)
888 {
889 if (pdrm)
890 regmap_update_bits(pdrm, 0x00, (1 << 8), (1 << 8));
891 }
892
893 static inline void enable_power_domain_write_protection(void)
894 {
895 if (pdrm)
896 regmap_update_bits(pdrm, 0x00, (1 << 8), (0 << 8));
897 }
898
899 static inline void sofware_reset_backup_domain(void)
900 {
901 unsigned long val;
902
903 val = readl(base + STM32F4_RCC_BDCR);
904 writel(val | BIT(16), base + STM32F4_RCC_BDCR);
905 writel(val & ~BIT(16), base + STM32F4_RCC_BDCR);
906 }
907
908 struct stm32_rgate {
909 struct clk_gate gate;
910 u8 bit_rdy_idx;
911 };
912
913 #define RGATE_TIMEOUT 50000
914
915 static int rgclk_enable(struct clk_hw *hw)
916 {
917 struct clk_gate *gate = to_clk_gate(hw);
918 struct stm32_rgate *rgate = to_rgclk(gate);
919 int bit_status;
920 unsigned int timeout = RGATE_TIMEOUT;
921
922 if (clk_gate_ops.is_enabled(hw))
923 return 0;
924
925 disable_power_domain_write_protection();
926
927 clk_gate_ops.enable(hw);
928
929 do {
930 bit_status = !(readl(gate->reg) & BIT(rgate->bit_rdy_idx));
931 if (bit_status)
932 udelay(100);
933
934 } while (bit_status && --timeout);
935
936 enable_power_domain_write_protection();
937
938 return bit_status;
939 }
940
941 static void rgclk_disable(struct clk_hw *hw)
942 {
943 clk_gate_ops.disable(hw);
944 }
945
946 static int rgclk_is_enabled(struct clk_hw *hw)
947 {
948 return clk_gate_ops.is_enabled(hw);
949 }
950
951 static const struct clk_ops rgclk_ops = {
952 .enable = rgclk_enable,
953 .disable = rgclk_disable,
954 .is_enabled = rgclk_is_enabled,
955 };
956
957 static struct clk_hw *clk_register_rgate(struct device *dev, const char *name,
958 const char *parent_name, unsigned long flags,
959 void __iomem *reg, u8 bit_idx, u8 bit_rdy_idx,
960 u8 clk_gate_flags, spinlock_t *lock)
961 {
962 struct stm32_rgate *rgate;
963 struct clk_init_data init = { NULL };
964 struct clk_hw *hw;
965 int ret;
966
967 rgate = kzalloc(sizeof(*rgate), GFP_KERNEL);
968 if (!rgate)
969 return ERR_PTR(-ENOMEM);
970
971 init.name = name;
972 init.ops = &rgclk_ops;
973 init.flags = flags;
974 init.parent_names = &parent_name;
975 init.num_parents = 1;
976
977 rgate->bit_rdy_idx = bit_rdy_idx;
978
979 rgate->gate.lock = lock;
980 rgate->gate.reg = reg;
981 rgate->gate.bit_idx = bit_idx;
982 rgate->gate.hw.init = &init;
983
984 hw = &rgate->gate.hw;
985 ret = clk_hw_register(dev, hw);
986 if (ret) {
987 kfree(rgate);
988 hw = ERR_PTR(ret);
989 }
990
991 return hw;
992 }
993
994 static int cclk_gate_enable(struct clk_hw *hw)
995 {
996 int ret;
997
998 disable_power_domain_write_protection();
999
1000 ret = clk_gate_ops.enable(hw);
1001
1002 enable_power_domain_write_protection();
1003
1004 return ret;
1005 }
1006
1007 static void cclk_gate_disable(struct clk_hw *hw)
1008 {
1009 disable_power_domain_write_protection();
1010
1011 clk_gate_ops.disable(hw);
1012
1013 enable_power_domain_write_protection();
1014 }
1015
1016 static int cclk_gate_is_enabled(struct clk_hw *hw)
1017 {
1018 return clk_gate_ops.is_enabled(hw);
1019 }
1020
1021 static const struct clk_ops cclk_gate_ops = {
1022 .enable = cclk_gate_enable,
1023 .disable = cclk_gate_disable,
1024 .is_enabled = cclk_gate_is_enabled,
1025 };
1026
1027 static u8 cclk_mux_get_parent(struct clk_hw *hw)
1028 {
1029 return clk_mux_ops.get_parent(hw);
1030 }
1031
1032 static int cclk_mux_set_parent(struct clk_hw *hw, u8 index)
1033 {
1034 int ret;
1035
1036 disable_power_domain_write_protection();
1037
1038 sofware_reset_backup_domain();
1039
1040 ret = clk_mux_ops.set_parent(hw, index);
1041
1042 enable_power_domain_write_protection();
1043
1044 return ret;
1045 }
1046
1047 static const struct clk_ops cclk_mux_ops = {
1048 .determine_rate = clk_hw_determine_rate_no_reparent,
1049 .get_parent = cclk_mux_get_parent,
1050 .set_parent = cclk_mux_set_parent,
1051 };
1052
1053 static struct clk_hw *stm32_register_cclk(struct device *dev, const char *name,
1054 const char * const *parent_names, int num_parents,
1055 void __iomem *reg, u8 bit_idx, u8 shift, unsigned long flags,
1056 spinlock_t *lock)
1057 {
1058 struct clk_hw *hw;
1059 struct clk_gate *gate;
1060 struct clk_mux *mux;
1061
1062 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
1063 if (!gate) {
1064 hw = ERR_PTR(-EINVAL);
1065 goto fail;
1066 }
1067
1068 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
1069 if (!mux) {
1070 kfree(gate);
1071 hw = ERR_PTR(-EINVAL);
1072 goto fail;
1073 }
1074
1075 gate->reg = reg;
1076 gate->bit_idx = bit_idx;
1077 gate->flags = 0;
1078 gate->lock = lock;
1079
1080 mux->reg = reg;
1081 mux->shift = shift;
1082 mux->mask = 3;
1083 mux->flags = 0;
1084
1085 hw = clk_hw_register_composite(dev, name, parent_names, num_parents,
1086 &mux->hw, &cclk_mux_ops,
1087 NULL, NULL,
1088 &gate->hw, &cclk_gate_ops,
1089 flags);
1090
1091 if (IS_ERR(hw)) {
1092 kfree(gate);
1093 kfree(mux);
1094 }
1095
1096 fail:
1097 return hw;
1098 }
1099
1100 static const char *sys_parents[] __initdata = { "hsi", NULL, "pll" };
1101
1102 static const struct clk_div_table ahb_div_table[] = {
1103 { 0x0, 1 }, { 0x1, 1 }, { 0x2, 1 }, { 0x3, 1 },
1104 { 0x4, 1 }, { 0x5, 1 }, { 0x6, 1 }, { 0x7, 1 },
1105 { 0x8, 2 }, { 0x9, 4 }, { 0xa, 8 }, { 0xb, 16 },
1106 { 0xc, 64 }, { 0xd, 128 }, { 0xe, 256 }, { 0xf, 512 },
1107 { 0 },
1108 };
1109
1110 static const struct clk_div_table apb_div_table[] = {
1111 { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
1112 { 4, 2 }, { 5, 4 }, { 6, 8 }, { 7, 16 },
1113 { 0 },
1114 };
1115
1116 static const char *rtc_parents[4] = {
1117 "no-clock", "lse", "lsi", "hse-rtc"
1118 };
1119
1120 static const char *pll_src = "pll-src";
1121
1122 static const char *pllsrc_parent[2] = { "hsi", NULL };
1123
1124 static const char *dsi_parent[2] = { NULL, "pll-r" };
1125
1126 static const char *lcd_parent[1] = { "pllsai-r-div" };
1127
1128 static const char *i2s_parents[2] = { "plli2s-r", NULL };
1129
1130 static const char *sai_parents[4] = { "pllsai-q-div", "plli2s-q-div", NULL,
1131 "no-clock" };
1132
1133 static const char *pll48_parents[2] = { "pll-q", "pllsai-p" };
1134
1135 static const char *sdmux_parents[2] = { "pll48", "sys" };
1136
1137 static const char *hdmi_parents[2] = { "lse", "hsi_div488" };
1138
1139 static const char *spdif_parent[1] = { "plli2s-p" };
1140
1141 static const char *lptim_parent[4] = { "apb1_mul", "lsi", "hsi", "lse" };
1142
1143 static const char *uart_parents1[4] = { "apb2_div", "sys", "hsi", "lse" };
1144 static const char *uart_parents2[4] = { "apb1_div", "sys", "hsi", "lse" };
1145
1146 static const char *i2c_parents[4] = { "apb1_div", "sys", "hsi", "no-clock" };
1147
1148 static const char * const dfsdm1_src[] = { "apb2_div", "sys" };
1149 static const char * const adsfdm1_parent[] = { "sai1_clk", "sai2_clk" };
1150
1151 struct stm32_aux_clk {
1152 int idx;
1153 const char *name;
1154 const char * const *parent_names;
1155 int num_parents;
1156 int offset_mux;
1157 u8 shift;
1158 u8 mask;
1159 int offset_gate;
1160 u8 bit_idx;
1161 unsigned long flags;
1162 };
1163
1164 struct stm32f4_clk_data {
1165 const struct stm32f4_gate_data *gates_data;
1166 const u64 *gates_map;
1167 int gates_num;
1168 const struct stm32f4_pll_data *pll_data;
1169 const struct stm32_aux_clk *aux_clk;
1170 int aux_clk_num;
1171 int end_primary;
1172 };
1173
1174 static const struct stm32_aux_clk stm32f429_aux_clk[] = {
1175 {
1176 CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
1177 NO_MUX, 0, 0,
1178 STM32F4_RCC_APB2ENR, 26,
1179 CLK_SET_RATE_PARENT
1180 },
1181 {
1182 CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
1183 STM32F4_RCC_CFGR, 23, 1,
1184 NO_GATE, 0,
1185 CLK_SET_RATE_PARENT
1186 },
1187 {
1188 CLK_SAI1, "sai1-a", sai_parents, ARRAY_SIZE(sai_parents),
1189 STM32F4_RCC_DCKCFGR, 20, 3,
1190 STM32F4_RCC_APB2ENR, 22,
1191 CLK_SET_RATE_PARENT
1192 },
1193 {
1194 CLK_SAI2, "sai1-b", sai_parents, ARRAY_SIZE(sai_parents),
1195 STM32F4_RCC_DCKCFGR, 22, 3,
1196 STM32F4_RCC_APB2ENR, 22,
1197 CLK_SET_RATE_PARENT
1198 },
1199 };
1200
1201 static const struct stm32_aux_clk stm32f469_aux_clk[] = {
1202 {
1203 CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
1204 NO_MUX, 0, 0,
1205 STM32F4_RCC_APB2ENR, 26,
1206 CLK_SET_RATE_PARENT
1207 },
1208 {
1209 CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
1210 STM32F4_RCC_CFGR, 23, 1,
1211 NO_GATE, 0,
1212 CLK_SET_RATE_PARENT
1213 },
1214 {
1215 CLK_SAI1, "sai1-a", sai_parents, ARRAY_SIZE(sai_parents),
1216 STM32F4_RCC_DCKCFGR, 20, 3,
1217 STM32F4_RCC_APB2ENR, 22,
1218 CLK_SET_RATE_PARENT
1219 },
1220 {
1221 CLK_SAI2, "sai1-b", sai_parents, ARRAY_SIZE(sai_parents),
1222 STM32F4_RCC_DCKCFGR, 22, 3,
1223 STM32F4_RCC_APB2ENR, 22,
1224 CLK_SET_RATE_PARENT
1225 },
1226 {
1227 NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents),
1228 STM32F4_RCC_DCKCFGR, 27, 1,
1229 NO_GATE, 0,
1230 0
1231 },
1232 {
1233 NO_IDX, "sdmux", sdmux_parents, ARRAY_SIZE(sdmux_parents),
1234 STM32F4_RCC_DCKCFGR, 28, 1,
1235 NO_GATE, 0,
1236 0
1237 },
1238 {
1239 CLK_F469_DSI, "dsi", dsi_parent, ARRAY_SIZE(dsi_parent),
1240 STM32F4_RCC_DCKCFGR, 29, 1,
1241 STM32F4_RCC_APB2ENR, 27,
1242 CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT
1243 },
1244 };
1245
1246 static const struct stm32_aux_clk stm32f746_aux_clk[] = {
1247 {
1248 CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
1249 NO_MUX, 0, 0,
1250 STM32F4_RCC_APB2ENR, 26,
1251 CLK_SET_RATE_PARENT
1252 },
1253 {
1254 CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
1255 STM32F4_RCC_CFGR, 23, 1,
1256 NO_GATE, 0,
1257 CLK_SET_RATE_PARENT
1258 },
1259 {
1260 CLK_SAI1, "sai1_clk", sai_parents, ARRAY_SIZE(sai_parents),
1261 STM32F4_RCC_DCKCFGR, 20, 3,
1262 STM32F4_RCC_APB2ENR, 22,
1263 CLK_SET_RATE_PARENT
1264 },
1265 {
1266 CLK_SAI2, "sai2_clk", sai_parents, ARRAY_SIZE(sai_parents),
1267 STM32F4_RCC_DCKCFGR, 22, 3,
1268 STM32F4_RCC_APB2ENR, 23,
1269 CLK_SET_RATE_PARENT
1270 },
1271 {
1272 NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents),
1273 STM32F7_RCC_DCKCFGR2, 27, 1,
1274 NO_GATE, 0,
1275 0
1276 },
1277 {
1278 NO_IDX, "sdmux", sdmux_parents, ARRAY_SIZE(sdmux_parents),
1279 STM32F7_RCC_DCKCFGR2, 28, 1,
1280 NO_GATE, 0,
1281 0
1282 },
1283 {
1284 CLK_HDMI_CEC, "hdmi-cec",
1285 hdmi_parents, ARRAY_SIZE(hdmi_parents),
1286 STM32F7_RCC_DCKCFGR2, 26, 1,
1287 NO_GATE, 0,
1288 0
1289 },
1290 {
1291 CLK_SPDIF, "spdif-rx",
1292 spdif_parent, ARRAY_SIZE(spdif_parent),
1293 STM32F7_RCC_DCKCFGR2, 22, 3,
1294 STM32F4_RCC_APB2ENR, 23,
1295 CLK_SET_RATE_PARENT
1296 },
1297 {
1298 CLK_USART1, "usart1",
1299 uart_parents1, ARRAY_SIZE(uart_parents1),
1300 STM32F7_RCC_DCKCFGR2, 0, 3,
1301 STM32F4_RCC_APB2ENR, 4,
1302 CLK_SET_RATE_PARENT,
1303 },
1304 {
1305 CLK_USART2, "usart2",
1306 uart_parents2, ARRAY_SIZE(uart_parents1),
1307 STM32F7_RCC_DCKCFGR2, 2, 3,
1308 STM32F4_RCC_APB1ENR, 17,
1309 CLK_SET_RATE_PARENT,
1310 },
1311 {
1312 CLK_USART3, "usart3",
1313 uart_parents2, ARRAY_SIZE(uart_parents1),
1314 STM32F7_RCC_DCKCFGR2, 4, 3,
1315 STM32F4_RCC_APB1ENR, 18,
1316 CLK_SET_RATE_PARENT,
1317 },
1318 {
1319 CLK_UART4, "uart4",
1320 uart_parents2, ARRAY_SIZE(uart_parents1),
1321 STM32F7_RCC_DCKCFGR2, 6, 3,
1322 STM32F4_RCC_APB1ENR, 19,
1323 CLK_SET_RATE_PARENT,
1324 },
1325 {
1326 CLK_UART5, "uart5",
1327 uart_parents2, ARRAY_SIZE(uart_parents1),
1328 STM32F7_RCC_DCKCFGR2, 8, 3,
1329 STM32F4_RCC_APB1ENR, 20,
1330 CLK_SET_RATE_PARENT,
1331 },
1332 {
1333 CLK_USART6, "usart6",
1334 uart_parents1, ARRAY_SIZE(uart_parents1),
1335 STM32F7_RCC_DCKCFGR2, 10, 3,
1336 STM32F4_RCC_APB2ENR, 5,
1337 CLK_SET_RATE_PARENT,
1338 },
1339
1340 {
1341 CLK_UART7, "uart7",
1342 uart_parents2, ARRAY_SIZE(uart_parents1),
1343 STM32F7_RCC_DCKCFGR2, 12, 3,
1344 STM32F4_RCC_APB1ENR, 30,
1345 CLK_SET_RATE_PARENT,
1346 },
1347 {
1348 CLK_UART8, "uart8",
1349 uart_parents2, ARRAY_SIZE(uart_parents1),
1350 STM32F7_RCC_DCKCFGR2, 14, 3,
1351 STM32F4_RCC_APB1ENR, 31,
1352 CLK_SET_RATE_PARENT,
1353 },
1354 {
1355 CLK_I2C1, "i2c1",
1356 i2c_parents, ARRAY_SIZE(i2c_parents),
1357 STM32F7_RCC_DCKCFGR2, 16, 3,
1358 STM32F4_RCC_APB1ENR, 21,
1359 CLK_SET_RATE_PARENT,
1360 },
1361 {
1362 CLK_I2C2, "i2c2",
1363 i2c_parents, ARRAY_SIZE(i2c_parents),
1364 STM32F7_RCC_DCKCFGR2, 18, 3,
1365 STM32F4_RCC_APB1ENR, 22,
1366 CLK_SET_RATE_PARENT,
1367 },
1368 {
1369 CLK_I2C3, "i2c3",
1370 i2c_parents, ARRAY_SIZE(i2c_parents),
1371 STM32F7_RCC_DCKCFGR2, 20, 3,
1372 STM32F4_RCC_APB1ENR, 23,
1373 CLK_SET_RATE_PARENT,
1374 },
1375 {
1376 CLK_I2C4, "i2c4",
1377 i2c_parents, ARRAY_SIZE(i2c_parents),
1378 STM32F7_RCC_DCKCFGR2, 22, 3,
1379 STM32F4_RCC_APB1ENR, 24,
1380 CLK_SET_RATE_PARENT,
1381 },
1382
1383 {
1384 CLK_LPTIMER, "lptim1",
1385 lptim_parent, ARRAY_SIZE(lptim_parent),
1386 STM32F7_RCC_DCKCFGR2, 24, 3,
1387 STM32F4_RCC_APB1ENR, 9,
1388 CLK_SET_RATE_PARENT
1389 },
1390 };
1391
1392 static const struct stm32_aux_clk stm32f769_aux_clk[] = {
1393 {
1394 CLK_LCD, "lcd-tft", lcd_parent, ARRAY_SIZE(lcd_parent),
1395 NO_MUX, 0, 0,
1396 STM32F4_RCC_APB2ENR, 26,
1397 CLK_SET_RATE_PARENT
1398 },
1399 {
1400 CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents),
1401 STM32F4_RCC_CFGR, 23, 1,
1402 NO_GATE, 0,
1403 CLK_SET_RATE_PARENT
1404 },
1405 {
1406 CLK_SAI1, "sai1_clk", sai_parents, ARRAY_SIZE(sai_parents),
1407 STM32F4_RCC_DCKCFGR, 20, 3,
1408 STM32F4_RCC_APB2ENR, 22,
1409 CLK_SET_RATE_PARENT
1410 },
1411 {
1412 CLK_SAI2, "sai2_clk", sai_parents, ARRAY_SIZE(sai_parents),
1413 STM32F4_RCC_DCKCFGR, 22, 3,
1414 STM32F4_RCC_APB2ENR, 23,
1415 CLK_SET_RATE_PARENT
1416 },
1417 {
1418 NO_IDX, "pll48", pll48_parents, ARRAY_SIZE(pll48_parents),
1419 STM32F7_RCC_DCKCFGR2, 27, 1,
1420 NO_GATE, 0,
1421 0
1422 },
1423 {
1424 NO_IDX, "sdmux1", sdmux_parents, ARRAY_SIZE(sdmux_parents),
1425 STM32F7_RCC_DCKCFGR2, 28, 1,
1426 NO_GATE, 0,
1427 0
1428 },
1429 {
1430 NO_IDX, "sdmux2", sdmux_parents, ARRAY_SIZE(sdmux_parents),
1431 STM32F7_RCC_DCKCFGR2, 29, 1,
1432 NO_GATE, 0,
1433 0
1434 },
1435 {
1436 CLK_HDMI_CEC, "hdmi-cec",
1437 hdmi_parents, ARRAY_SIZE(hdmi_parents),
1438 STM32F7_RCC_DCKCFGR2, 26, 1,
1439 NO_GATE, 0,
1440 0
1441 },
1442 {
1443 CLK_SPDIF, "spdif-rx",
1444 spdif_parent, ARRAY_SIZE(spdif_parent),
1445 STM32F7_RCC_DCKCFGR2, 22, 3,
1446 STM32F4_RCC_APB2ENR, 23,
1447 CLK_SET_RATE_PARENT
1448 },
1449 {
1450 CLK_USART1, "usart1",
1451 uart_parents1, ARRAY_SIZE(uart_parents1),
1452 STM32F7_RCC_DCKCFGR2, 0, 3,
1453 STM32F4_RCC_APB2ENR, 4,
1454 CLK_SET_RATE_PARENT,
1455 },
1456 {
1457 CLK_USART2, "usart2",
1458 uart_parents2, ARRAY_SIZE(uart_parents1),
1459 STM32F7_RCC_DCKCFGR2, 2, 3,
1460 STM32F4_RCC_APB1ENR, 17,
1461 CLK_SET_RATE_PARENT,
1462 },
1463 {
1464 CLK_USART3, "usart3",
1465 uart_parents2, ARRAY_SIZE(uart_parents1),
1466 STM32F7_RCC_DCKCFGR2, 4, 3,
1467 STM32F4_RCC_APB1ENR, 18,
1468 CLK_SET_RATE_PARENT,
1469 },
1470 {
1471 CLK_UART4, "uart4",
1472 uart_parents2, ARRAY_SIZE(uart_parents1),
1473 STM32F7_RCC_DCKCFGR2, 6, 3,
1474 STM32F4_RCC_APB1ENR, 19,
1475 CLK_SET_RATE_PARENT,
1476 },
1477 {
1478 CLK_UART5, "uart5",
1479 uart_parents2, ARRAY_SIZE(uart_parents1),
1480 STM32F7_RCC_DCKCFGR2, 8, 3,
1481 STM32F4_RCC_APB1ENR, 20,
1482 CLK_SET_RATE_PARENT,
1483 },
1484 {
1485 CLK_USART6, "usart6",
1486 uart_parents1, ARRAY_SIZE(uart_parents1),
1487 STM32F7_RCC_DCKCFGR2, 10, 3,
1488 STM32F4_RCC_APB2ENR, 5,
1489 CLK_SET_RATE_PARENT,
1490 },
1491 {
1492 CLK_UART7, "uart7",
1493 uart_parents2, ARRAY_SIZE(uart_parents1),
1494 STM32F7_RCC_DCKCFGR2, 12, 3,
1495 STM32F4_RCC_APB1ENR, 30,
1496 CLK_SET_RATE_PARENT,
1497 },
1498 {
1499 CLK_UART8, "uart8",
1500 uart_parents2, ARRAY_SIZE(uart_parents1),
1501 STM32F7_RCC_DCKCFGR2, 14, 3,
1502 STM32F4_RCC_APB1ENR, 31,
1503 CLK_SET_RATE_PARENT,
1504 },
1505 {
1506 CLK_I2C1, "i2c1",
1507 i2c_parents, ARRAY_SIZE(i2c_parents),
1508 STM32F7_RCC_DCKCFGR2, 16, 3,
1509 STM32F4_RCC_APB1ENR, 21,
1510 CLK_SET_RATE_PARENT,
1511 },
1512 {
1513 CLK_I2C2, "i2c2",
1514 i2c_parents, ARRAY_SIZE(i2c_parents),
1515 STM32F7_RCC_DCKCFGR2, 18, 3,
1516 STM32F4_RCC_APB1ENR, 22,
1517 CLK_SET_RATE_PARENT,
1518 },
1519 {
1520 CLK_I2C3, "i2c3",
1521 i2c_parents, ARRAY_SIZE(i2c_parents),
1522 STM32F7_RCC_DCKCFGR2, 20, 3,
1523 STM32F4_RCC_APB1ENR, 23,
1524 CLK_SET_RATE_PARENT,
1525 },
1526 {
1527 CLK_I2C4, "i2c4",
1528 i2c_parents, ARRAY_SIZE(i2c_parents),
1529 STM32F7_RCC_DCKCFGR2, 22, 3,
1530 STM32F4_RCC_APB1ENR, 24,
1531 CLK_SET_RATE_PARENT,
1532 },
1533 {
1534 CLK_LPTIMER, "lptim1",
1535 lptim_parent, ARRAY_SIZE(lptim_parent),
1536 STM32F7_RCC_DCKCFGR2, 24, 3,
1537 STM32F4_RCC_APB1ENR, 9,
1538 CLK_SET_RATE_PARENT
1539 },
1540 {
1541 CLK_F769_DSI, "dsi",
1542 dsi_parent, ARRAY_SIZE(dsi_parent),
1543 STM32F7_RCC_DCKCFGR2, 0, 1,
1544 STM32F4_RCC_APB2ENR, 27,
1545 CLK_SET_RATE_PARENT
1546 },
1547 {
1548 CLK_DFSDM1, "dfsdm1",
1549 dfsdm1_src, ARRAY_SIZE(dfsdm1_src),
1550 STM32F4_RCC_DCKCFGR, 25, 1,
1551 STM32F4_RCC_APB2ENR, 29,
1552 CLK_SET_RATE_PARENT
1553 },
1554 {
1555 CLK_ADFSDM1, "adfsdm1",
1556 adsfdm1_parent, ARRAY_SIZE(adsfdm1_parent),
1557 STM32F4_RCC_DCKCFGR, 26, 1,
1558 STM32F4_RCC_APB2ENR, 29,
1559 CLK_SET_RATE_PARENT
1560 },
1561 };
1562
1563 static const struct stm32f4_clk_data stm32f429_clk_data = {
1564 .end_primary = END_PRIMARY_CLK,
1565 .gates_data = stm32f429_gates,
1566 .gates_map = stm32f42xx_gate_map,
1567 .gates_num = ARRAY_SIZE(stm32f429_gates),
1568 .pll_data = stm32f429_pll,
1569 .aux_clk = stm32f429_aux_clk,
1570 .aux_clk_num = ARRAY_SIZE(stm32f429_aux_clk),
1571 };
1572
1573 static const struct stm32f4_clk_data stm32f469_clk_data = {
1574 .end_primary = END_PRIMARY_CLK,
1575 .gates_data = stm32f469_gates,
1576 .gates_map = stm32f46xx_gate_map,
1577 .gates_num = ARRAY_SIZE(stm32f469_gates),
1578 .pll_data = stm32f469_pll,
1579 .aux_clk = stm32f469_aux_clk,
1580 .aux_clk_num = ARRAY_SIZE(stm32f469_aux_clk),
1581 };
1582
1583 static const struct stm32f4_clk_data stm32f746_clk_data = {
1584 .end_primary = END_PRIMARY_CLK_F7,
1585 .gates_data = stm32f746_gates,
1586 .gates_map = stm32f746_gate_map,
1587 .gates_num = ARRAY_SIZE(stm32f746_gates),
1588 .pll_data = stm32f469_pll,
1589 .aux_clk = stm32f746_aux_clk,
1590 .aux_clk_num = ARRAY_SIZE(stm32f746_aux_clk),
1591 };
1592
1593 static const struct stm32f4_clk_data stm32f769_clk_data = {
1594 .end_primary = END_PRIMARY_CLK_F7,
1595 .gates_data = stm32f769_gates,
1596 .gates_map = stm32f769_gate_map,
1597 .gates_num = ARRAY_SIZE(stm32f769_gates),
1598 .pll_data = stm32f469_pll,
1599 .aux_clk = stm32f769_aux_clk,
1600 .aux_clk_num = ARRAY_SIZE(stm32f769_aux_clk),
1601 };
1602
1603 static const struct of_device_id stm32f4_of_match[] = {
1604 {
1605 .compatible = "st,stm32f42xx-rcc",
1606 .data = &stm32f429_clk_data
1607 },
1608 {
1609 .compatible = "st,stm32f469-rcc",
1610 .data = &stm32f469_clk_data
1611 },
1612 {
1613 .compatible = "st,stm32f746-rcc",
1614 .data = &stm32f746_clk_data
1615 },
1616 {
1617 .compatible = "st,stm32f769-rcc",
1618 .data = &stm32f769_clk_data
1619 },
1620 {}
1621 };
1622
1623 static struct clk_hw *stm32_register_aux_clk(const char *name,
1624 const char * const *parent_names, int num_parents,
1625 int offset_mux, u8 shift, u8 mask,
1626 int offset_gate, u8 bit_idx,
1627 unsigned long flags, spinlock_t *lock)
1628 {
1629 struct clk_hw *hw;
1630 struct clk_gate *gate = NULL;
1631 struct clk_mux *mux = NULL;
1632 struct clk_hw *mux_hw = NULL, *gate_hw = NULL;
1633 const struct clk_ops *mux_ops = NULL, *gate_ops = NULL;
1634
1635 if (offset_gate != NO_GATE) {
1636 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
1637 if (!gate) {
1638 hw = ERR_PTR(-EINVAL);
1639 goto fail;
1640 }
1641
1642 gate->reg = base + offset_gate;
1643 gate->bit_idx = bit_idx;
1644 gate->flags = 0;
1645 gate->lock = lock;
1646 gate_hw = &gate->hw;
1647 gate_ops = &clk_gate_ops;
1648 }
1649
1650 if (offset_mux != NO_MUX) {
1651 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
1652 if (!mux) {
1653 hw = ERR_PTR(-EINVAL);
1654 goto fail;
1655 }
1656
1657 mux->reg = base + offset_mux;
1658 mux->shift = shift;
1659 mux->mask = mask;
1660 mux->flags = 0;
1661 mux_hw = &mux->hw;
1662 mux_ops = &clk_mux_ops;
1663 }
1664
1665 if (mux_hw == NULL && gate_hw == NULL) {
1666 hw = ERR_PTR(-EINVAL);
1667 goto fail;
1668 }
1669
1670 hw = clk_hw_register_composite(NULL, name, parent_names, num_parents,
1671 mux_hw, mux_ops,
1672 NULL, NULL,
1673 gate_hw, gate_ops,
1674 flags);
1675
1676 fail:
1677 if (IS_ERR(hw)) {
1678 kfree(gate);
1679 kfree(mux);
1680 }
1681
1682 return hw;
1683 }
1684
1685 static void __init stm32f4_rcc_init(struct device_node *np)
1686 {
1687 const char *hse_clk, *i2s_in_clk;
1688 int n;
1689 const struct of_device_id *match;
1690 const struct stm32f4_clk_data *data;
1691 unsigned long pllm;
1692 struct clk_hw *pll_src_hw;
1693
1694 base = of_iomap(np, 0);
1695 if (!base) {
1696 pr_err("%pOFn: unable to map resource\n", np);
1697 return;
1698 }
1699
1700 pdrm = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
1701 if (IS_ERR(pdrm)) {
1702 pdrm = NULL;
1703 pr_warn("%s: Unable to get syscfg\n", __func__);
1704 }
1705
1706 match = of_match_node(stm32f4_of_match, np);
1707 if (WARN_ON(!match))
1708 return;
1709
1710 data = match->data;
1711
1712 stm32fx_end_primary_clk = data->end_primary;
1713
1714 clks = kmalloc_array(data->gates_num + stm32fx_end_primary_clk,
1715 sizeof(*clks), GFP_KERNEL);
1716 if (!clks)
1717 goto fail;
1718
1719 stm32f4_gate_map = data->gates_map;
1720
1721 hse_clk = of_clk_get_parent_name(np, 0);
1722 dsi_parent[0] = hse_clk;
1723 pllsrc_parent[1] = hse_clk;
1724
1725 i2s_in_clk = of_clk_get_parent_name(np, 1);
1726
1727 i2s_parents[1] = i2s_in_clk;
1728 sai_parents[2] = i2s_in_clk;
1729
1730 if (of_device_is_compatible(np, "st,stm32f769-rcc")) {
1731 clk_hw_register_gate(NULL, "dfsdm1_apb", "apb2_div", 0,
1732 base + STM32F4_RCC_APB2ENR, 29,
1733 CLK_IGNORE_UNUSED, &stm32f4_clk_lock);
1734 dsi_parent[0] = pll_src;
1735 sai_parents[3] = pll_src;
1736 }
1737
1738 clks[CLK_HSI] = clk_hw_register_fixed_rate_with_accuracy(NULL, "hsi",
1739 NULL, 0, 16000000, 160000);
1740
1741 pll_src_hw = clk_hw_register_mux(NULL, pll_src, pllsrc_parent,
1742 ARRAY_SIZE(pllsrc_parent), 0,
1743 base + STM32F4_RCC_PLLCFGR, 22, 1, 0,
1744 &stm32f4_clk_lock);
1745
1746 pllm = readl(base + STM32F4_RCC_PLLCFGR) & 0x3f;
1747
1748 clk_hw_register_fixed_factor(NULL, "vco_in", pll_src,
1749 0, 1, pllm);
1750
1751 stm32f4_rcc_register_pll("vco_in", &data->pll_data[0],
1752 &stm32f4_clk_lock);
1753
1754 clks[PLL_VCO_I2S] = stm32f4_rcc_register_pll("vco_in",
1755 &data->pll_data[1], &stm32f4_clk_lock);
1756
1757 clks[PLL_VCO_SAI] = stm32f4_rcc_register_pll("vco_in",
1758 &data->pll_data[2], &stm32f4_clk_lock);
1759
1760 for (n = 0; n < MAX_POST_DIV; n++) {
1761 const struct stm32f4_pll_post_div_data *post_div;
1762 struct clk_hw *hw;
1763
1764 post_div = &post_div_data[n];
1765
1766 hw = clk_register_pll_div(post_div->name,
1767 post_div->parent,
1768 post_div->flag,
1769 base + post_div->offset,
1770 post_div->shift,
1771 post_div->width,
1772 post_div->flag_div,
1773 post_div->div_table,
1774 clks[post_div->pll_idx],
1775 &stm32f4_clk_lock);
1776
1777 if (post_div->idx != NO_IDX)
1778 clks[post_div->idx] = hw;
1779 }
1780
1781 sys_parents[1] = hse_clk;
1782
1783 clks[CLK_SYSCLK] = clk_hw_register_mux_table(
1784 NULL, "sys", sys_parents, ARRAY_SIZE(sys_parents), 0,
1785 base + STM32F4_RCC_CFGR, 0, 3, 0, NULL, &stm32f4_clk_lock);
1786
1787 clk_register_divider_table(NULL, "ahb_div", "sys",
1788 CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR,
1789 4, 4, 0, ahb_div_table, &stm32f4_clk_lock);
1790
1791 clk_register_divider_table(NULL, "apb1_div", "ahb_div",
1792 CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR,
1793 10, 3, 0, apb_div_table, &stm32f4_clk_lock);
1794 clk_register_apb_mul(NULL, "apb1_mul", "apb1_div",
1795 CLK_SET_RATE_PARENT, 12);
1796
1797 clk_register_divider_table(NULL, "apb2_div", "ahb_div",
1798 CLK_SET_RATE_PARENT, base + STM32F4_RCC_CFGR,
1799 13, 3, 0, apb_div_table, &stm32f4_clk_lock);
1800 clk_register_apb_mul(NULL, "apb2_mul", "apb2_div",
1801 CLK_SET_RATE_PARENT, 15);
1802
1803 clks[SYSTICK] = clk_hw_register_fixed_factor(NULL, "systick", "ahb_div",
1804 0, 1, 8);
1805 clks[FCLK] = clk_hw_register_fixed_factor(NULL, "fclk", "ahb_div",
1806 0, 1, 1);
1807
1808 for (n = 0; n < data->gates_num; n++) {
1809 const struct stm32f4_gate_data *gd;
1810 unsigned int secondary;
1811 int idx;
1812
1813 gd = &data->gates_data[n];
1814 secondary = 8 * (gd->offset - STM32F4_RCC_AHB1ENR) +
1815 gd->bit_idx;
1816 idx = stm32f4_rcc_lookup_clk_idx(0, secondary);
1817
1818 if (idx < 0)
1819 goto fail;
1820
1821 clks[idx] = clk_hw_register_gate(
1822 NULL, gd->name, gd->parent_name, gd->flags,
1823 base + gd->offset, gd->bit_idx, 0, &stm32f4_clk_lock);
1824
1825 if (IS_ERR(clks[idx])) {
1826 pr_err("%pOF: Unable to register leaf clock %s\n",
1827 np, gd->name);
1828 goto fail;
1829 }
1830 }
1831
1832 clks[CLK_LSI] = clk_register_rgate(NULL, "lsi", "clk-lsi", 0,
1833 base + STM32F4_RCC_CSR, 0, 1, 0, &stm32f4_clk_lock);
1834
1835 if (IS_ERR(clks[CLK_LSI])) {
1836 pr_err("Unable to register lsi clock\n");
1837 goto fail;
1838 }
1839
1840 clks[CLK_LSE] = clk_register_rgate(NULL, "lse", "clk-lse", 0,
1841 base + STM32F4_RCC_BDCR, 0, 1, 0, &stm32f4_clk_lock);
1842
1843 if (IS_ERR(clks[CLK_LSE])) {
1844 pr_err("Unable to register lse clock\n");
1845 goto fail;
1846 }
1847
1848 clks[CLK_HSE_RTC] = clk_hw_register_divider(NULL, "hse-rtc", "clk-hse",
1849 0, base + STM32F4_RCC_CFGR, 16, 5, 0,
1850 &stm32f4_clk_lock);
1851
1852 if (IS_ERR(clks[CLK_HSE_RTC])) {
1853 pr_err("Unable to register hse-rtc clock\n");
1854 goto fail;
1855 }
1856
1857 clks[CLK_RTC] = stm32_register_cclk(NULL, "rtc", rtc_parents, 4,
1858 base + STM32F4_RCC_BDCR, 15, 8, 0, &stm32f4_clk_lock);
1859
1860 if (IS_ERR(clks[CLK_RTC])) {
1861 pr_err("Unable to register rtc clock\n");
1862 goto fail;
1863 }
1864
1865 for (n = 0; n < data->aux_clk_num; n++) {
1866 const struct stm32_aux_clk *aux_clk;
1867 struct clk_hw *hw;
1868
1869 aux_clk = &data->aux_clk[n];
1870
1871 hw = stm32_register_aux_clk(aux_clk->name,
1872 aux_clk->parent_names, aux_clk->num_parents,
1873 aux_clk->offset_mux, aux_clk->shift,
1874 aux_clk->mask, aux_clk->offset_gate,
1875 aux_clk->bit_idx, aux_clk->flags,
1876 &stm32f4_clk_lock);
1877
1878 if (IS_ERR(hw)) {
1879 pr_warn("Unable to register %s clk\n", aux_clk->name);
1880 continue;
1881 }
1882
1883 if (aux_clk->idx != NO_IDX)
1884 clks[aux_clk->idx] = hw;
1885 }
1886
1887 if (of_device_is_compatible(np, "st,stm32f746-rcc")) {
1888
1889 clk_hw_register_fixed_factor(NULL, "hsi_div488", "hsi", 0,
1890 1, 488);
1891
1892 clks[CLK_PLL_SRC] = pll_src_hw;
1893 }
1894
1895 of_clk_add_hw_provider(np, stm32f4_rcc_lookup_clk, NULL);
1896
1897 return;
1898 fail:
1899 kfree(clks);
1900 iounmap(base);
1901 }
1902 CLK_OF_DECLARE_DRIVER(stm32f42xx_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init);
1903 CLK_OF_DECLARE_DRIVER(stm32f46xx_rcc, "st,stm32f469-rcc", stm32f4_rcc_init);
1904 CLK_OF_DECLARE_DRIVER(stm32f746_rcc, "st,stm32f746-rcc", stm32f4_rcc_init);
1905 CLK_OF_DECLARE_DRIVER(stm32f769_rcc, "st,stm32f769-rcc", stm32f4_rcc_init);
Linux Kernel