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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Amlogic Meson-AXG Clock Controller Driver
4 *
5 * Copyright (c) 2016 Baylibre SAS.
6 * Author: Michael Turquette <mturquette@baylibre.com>
7 *
8 * Copyright (c) 2019 Baylibre SAS.
9 * Author: Neil Armstrong <narmstrong@baylibre.com>
10 */
11#include <linux/clk-provider.h>
12#include <linux/platform_device.h>
13#include <linux/reset-controller.h>
14#include <linux/mfd/syscon.h>
15#include "meson-aoclk.h"
16#include "g12a-aoclk.h"
17
18#include "clk-regmap.h"
19#include "clk-dualdiv.h"
20
21/*
22 * AO Configuration Clock registers offsets
23 * Register offsets from the data sheet must be multiplied by 4.
24 */
25#define AO_RTI_STATUS_REG3 0x0C
26#define AO_RTI_PWR_CNTL_REG0 0x10
27#define AO_RTI_GEN_CNTL_REG0 0x40
28#define AO_CLK_GATE0 0x4c
29#define AO_CLK_GATE0_SP 0x50
30#define AO_OSCIN_CNTL 0x58
31#define AO_CEC_CLK_CNTL_REG0 0x74
32#define AO_CEC_CLK_CNTL_REG1 0x78
33#define AO_SAR_CLK 0x90
34#define AO_RTC_ALT_CLK_CNTL0 0x94
35#define AO_RTC_ALT_CLK_CNTL1 0x98
36
37/*
38 * Like every other peripheral clock gate in Amlogic Clock drivers,
39 * we are using CLK_IGNORE_UNUSED here, so we keep the state of the
40 * bootloader. The goal is to remove this flag at some point.
41 * Actually removing it will require some extensive test to be done safely.
42 */
43#define AXG_AO_GATE(_name, _reg, _bit) \
44static struct clk_regmap g12a_aoclk_##_name = { \
45 .data = &(struct clk_regmap_gate_data) { \
46 .offset = (_reg), \
47 .bit_idx = (_bit), \
48 }, \
49 .hw.init = &(struct clk_init_data) { \
50 .name = "g12a_ao_" #_name, \
51 .ops = &clk_regmap_gate_ops, \
52 .parent_data = &(const struct clk_parent_data) { \
53 .fw_name = "mpeg-clk", \
54 }, \
55 .num_parents = 1, \
56 .flags = CLK_IGNORE_UNUSED, \
57 }, \
58}
59
60AXG_AO_GATE(ahb, AO_CLK_GATE0, 0);
61AXG_AO_GATE(ir_in, AO_CLK_GATE0, 1);
62AXG_AO_GATE(i2c_m0, AO_CLK_GATE0, 2);
63AXG_AO_GATE(i2c_s0, AO_CLK_GATE0, 3);
64AXG_AO_GATE(uart, AO_CLK_GATE0, 4);
65AXG_AO_GATE(prod_i2c, AO_CLK_GATE0, 5);
66AXG_AO_GATE(uart2, AO_CLK_GATE0, 6);
67AXG_AO_GATE(ir_out, AO_CLK_GATE0, 7);
68AXG_AO_GATE(saradc, AO_CLK_GATE0, 8);
69AXG_AO_GATE(mailbox, AO_CLK_GATE0_SP, 0);
70AXG_AO_GATE(m3, AO_CLK_GATE0_SP, 1);
71AXG_AO_GATE(ahb_sram, AO_CLK_GATE0_SP, 2);
72AXG_AO_GATE(rti, AO_CLK_GATE0_SP, 3);
73AXG_AO_GATE(m4_fclk, AO_CLK_GATE0_SP, 4);
74AXG_AO_GATE(m4_hclk, AO_CLK_GATE0_SP, 5);
75
76static struct clk_regmap g12a_aoclk_cts_oscin = {
77 .data = &(struct clk_regmap_gate_data){
78 .offset = AO_RTI_PWR_CNTL_REG0,
79 .bit_idx = 14,
80 },
81 .hw.init = &(struct clk_init_data){
82 .name = "cts_oscin",
83 .ops = &clk_regmap_gate_ro_ops,
84 .parent_data = &(const struct clk_parent_data) {
85 .fw_name = "xtal",
86 },
87 .num_parents = 1,
88 },
89};
90
91static const struct meson_clk_dualdiv_param g12a_32k_div_table[] = {
92 {
93 .dual = 1,
94 .n1 = 733,
95 .m1 = 8,
96 .n2 = 732,
97 .m2 = 11,
98 }, {}
99};
100
101/* 32k_by_oscin clock */
102
103static struct clk_regmap g12a_aoclk_32k_by_oscin_pre = {
104 .data = &(struct clk_regmap_gate_data){
105 .offset = AO_RTC_ALT_CLK_CNTL0,
106 .bit_idx = 31,
107 },
108 .hw.init = &(struct clk_init_data){
109 .name = "g12a_ao_32k_by_oscin_pre",
110 .ops = &clk_regmap_gate_ops,
111 .parent_hws = (const struct clk_hw *[]) {
112 &g12a_aoclk_cts_oscin.hw
113 },
114 .num_parents = 1,
115 },
116};
117
118static struct clk_regmap g12a_aoclk_32k_by_oscin_div = {
119 .data = &(struct meson_clk_dualdiv_data){
120 .n1 = {
121 .reg_off = AO_RTC_ALT_CLK_CNTL0,
122 .shift = 0,
123 .width = 12,
124 },
125 .n2 = {
126 .reg_off = AO_RTC_ALT_CLK_CNTL0,
127 .shift = 12,
128 .width = 12,
129 },
130 .m1 = {
131 .reg_off = AO_RTC_ALT_CLK_CNTL1,
132 .shift = 0,
133 .width = 12,
134 },
135 .m2 = {
136 .reg_off = AO_RTC_ALT_CLK_CNTL1,
137 .shift = 12,
138 .width = 12,
139 },
140 .dual = {
141 .reg_off = AO_RTC_ALT_CLK_CNTL0,
142 .shift = 28,
143 .width = 1,
144 },
145 .table = g12a_32k_div_table,
146 },
147 .hw.init = &(struct clk_init_data){
148 .name = "g12a_ao_32k_by_oscin_div",
149 .ops = &meson_clk_dualdiv_ops,
150 .parent_hws = (const struct clk_hw *[]) {
151 &g12a_aoclk_32k_by_oscin_pre.hw
152 },
153 .num_parents = 1,
154 },
155};
156
157static struct clk_regmap g12a_aoclk_32k_by_oscin_sel = {
158 .data = &(struct clk_regmap_mux_data) {
159 .offset = AO_RTC_ALT_CLK_CNTL1,
160 .mask = 0x1,
161 .shift = 24,
162 .flags = CLK_MUX_ROUND_CLOSEST,
163 },
164 .hw.init = &(struct clk_init_data){
165 .name = "g12a_ao_32k_by_oscin_sel",
166 .ops = &clk_regmap_mux_ops,
167 .parent_hws = (const struct clk_hw *[]) {
168 &g12a_aoclk_32k_by_oscin_div.hw,
169 &g12a_aoclk_32k_by_oscin_pre.hw,
170 },
171 .num_parents = 2,
172 .flags = CLK_SET_RATE_PARENT,
173 },
174};
175
176static struct clk_regmap g12a_aoclk_32k_by_oscin = {
177 .data = &(struct clk_regmap_gate_data){
178 .offset = AO_RTC_ALT_CLK_CNTL0,
179 .bit_idx = 30,
180 },
181 .hw.init = &(struct clk_init_data){
182 .name = "g12a_ao_32k_by_oscin",
183 .ops = &clk_regmap_gate_ops,
184 .parent_hws = (const struct clk_hw *[]) {
185 &g12a_aoclk_32k_by_oscin_sel.hw
186 },
187 .num_parents = 1,
188 .flags = CLK_SET_RATE_PARENT,
189 },
190};
191
192/* cec clock */
193
194static struct clk_regmap g12a_aoclk_cec_pre = {
195 .data = &(struct clk_regmap_gate_data){
196 .offset = AO_CEC_CLK_CNTL_REG0,
197 .bit_idx = 31,
198 },
199 .hw.init = &(struct clk_init_data){
200 .name = "g12a_ao_cec_pre",
201 .ops = &clk_regmap_gate_ops,
202 .parent_hws = (const struct clk_hw *[]) {
203 &g12a_aoclk_cts_oscin.hw
204 },
205 .num_parents = 1,
206 },
207};
208
209static struct clk_regmap g12a_aoclk_cec_div = {
210 .data = &(struct meson_clk_dualdiv_data){
211 .n1 = {
212 .reg_off = AO_CEC_CLK_CNTL_REG0,
213 .shift = 0,
214 .width = 12,
215 },
216 .n2 = {
217 .reg_off = AO_CEC_CLK_CNTL_REG0,
218 .shift = 12,
219 .width = 12,
220 },
221 .m1 = {
222 .reg_off = AO_CEC_CLK_CNTL_REG1,
223 .shift = 0,
224 .width = 12,
225 },
226 .m2 = {
227 .reg_off = AO_CEC_CLK_CNTL_REG1,
228 .shift = 12,
229 .width = 12,
230 },
231 .dual = {
232 .reg_off = AO_CEC_CLK_CNTL_REG0,
233 .shift = 28,
234 .width = 1,
235 },
236 .table = g12a_32k_div_table,
237 },
238 .hw.init = &(struct clk_init_data){
239 .name = "g12a_ao_cec_div",
240 .ops = &meson_clk_dualdiv_ops,
241 .parent_hws = (const struct clk_hw *[]) {
242 &g12a_aoclk_cec_pre.hw
243 },
244 .num_parents = 1,
245 },
246};
247
248static struct clk_regmap g12a_aoclk_cec_sel = {
249 .data = &(struct clk_regmap_mux_data) {
250 .offset = AO_CEC_CLK_CNTL_REG1,
251 .mask = 0x1,
252 .shift = 24,
253 .flags = CLK_MUX_ROUND_CLOSEST,
254 },
255 .hw.init = &(struct clk_init_data){
256 .name = "g12a_ao_cec_sel",
257 .ops = &clk_regmap_mux_ops,
258 .parent_hws = (const struct clk_hw *[]) {
259 &g12a_aoclk_cec_div.hw,
260 &g12a_aoclk_cec_pre.hw,
261 },
262 .num_parents = 2,
263 .flags = CLK_SET_RATE_PARENT,
264 },
265};
266
267static struct clk_regmap g12a_aoclk_cec = {
268 .data = &(struct clk_regmap_gate_data){
269 .offset = AO_CEC_CLK_CNTL_REG0,
270 .bit_idx = 30,
271 },
272 .hw.init = &(struct clk_init_data){
273 .name = "g12a_ao_cec",
274 .ops = &clk_regmap_gate_ops,
275 .parent_hws = (const struct clk_hw *[]) {
276 &g12a_aoclk_cec_sel.hw
277 },
278 .num_parents = 1,
279 .flags = CLK_SET_RATE_PARENT,
280 },
281};
282
283static struct clk_regmap g12a_aoclk_cts_rtc_oscin = {
284 .data = &(struct clk_regmap_mux_data) {
285 .offset = AO_RTI_PWR_CNTL_REG0,
286 .mask = 0x1,
287 .shift = 10,
288 .flags = CLK_MUX_ROUND_CLOSEST,
289 },
290 .hw.init = &(struct clk_init_data){
291 .name = "g12a_ao_cts_rtc_oscin",
292 .ops = &clk_regmap_mux_ops,
293 .parent_data = (const struct clk_parent_data []) {
294 { .hw = &g12a_aoclk_32k_by_oscin.hw },
295 { .fw_name = "ext-32k-0", },
296 },
297 .num_parents = 2,
298 .flags = CLK_SET_RATE_PARENT,
299 },
300};
301
302static struct clk_regmap g12a_aoclk_clk81 = {
303 .data = &(struct clk_regmap_mux_data) {
304 .offset = AO_RTI_PWR_CNTL_REG0,
305 .mask = 0x1,
306 .shift = 8,
307 .flags = CLK_MUX_ROUND_CLOSEST,
308 },
309 .hw.init = &(struct clk_init_data){
310 .name = "g12a_ao_clk81",
311 .ops = &clk_regmap_mux_ro_ops,
312 .parent_data = (const struct clk_parent_data []) {
313 { .fw_name = "mpeg-clk", },
314 { .hw = &g12a_aoclk_cts_rtc_oscin.hw },
315 },
316 .num_parents = 2,
317 .flags = CLK_SET_RATE_PARENT,
318 },
319};
320
321static struct clk_regmap g12a_aoclk_saradc_mux = {
322 .data = &(struct clk_regmap_mux_data) {
323 .offset = AO_SAR_CLK,
324 .mask = 0x3,
325 .shift = 9,
326 },
327 .hw.init = &(struct clk_init_data){
328 .name = "g12a_ao_saradc_mux",
329 .ops = &clk_regmap_mux_ops,
330 .parent_data = (const struct clk_parent_data []) {
331 { .fw_name = "xtal", },
332 { .hw = &g12a_aoclk_clk81.hw },
333 },
334 .num_parents = 2,
335 },
336};
337
338static struct clk_regmap g12a_aoclk_saradc_div = {
339 .data = &(struct clk_regmap_div_data) {
340 .offset = AO_SAR_CLK,
341 .shift = 0,
342 .width = 8,
343 },
344 .hw.init = &(struct clk_init_data){
345 .name = "g12a_ao_saradc_div",
346 .ops = &clk_regmap_divider_ops,
347 .parent_hws = (const struct clk_hw *[]) {
348 &g12a_aoclk_saradc_mux.hw
349 },
350 .num_parents = 1,
351 .flags = CLK_SET_RATE_PARENT,
352 },
353};
354
355static struct clk_regmap g12a_aoclk_saradc_gate = {
356 .data = &(struct clk_regmap_gate_data) {
357 .offset = AO_SAR_CLK,
358 .bit_idx = 8,
359 },
360 .hw.init = &(struct clk_init_data){
361 .name = "g12a_ao_saradc_gate",
362 .ops = &clk_regmap_gate_ops,
363 .parent_hws = (const struct clk_hw *[]) {
364 &g12a_aoclk_saradc_div.hw
365 },
366 .num_parents = 1,
367 .flags = CLK_SET_RATE_PARENT,
368 },
369};
370
371static const unsigned int g12a_aoclk_reset[] = {
372 [RESET_AO_IR_IN] = 16,
373 [RESET_AO_UART] = 17,
374 [RESET_AO_I2C_M] = 18,
375 [RESET_AO_I2C_S] = 19,
376 [RESET_AO_SAR_ADC] = 20,
377 [RESET_AO_UART2] = 22,
378 [RESET_AO_IR_OUT] = 23,
379};
380
381static struct clk_regmap *g12a_aoclk_regmap[] = {
382 &g12a_aoclk_ahb,
383 &g12a_aoclk_ir_in,
384 &g12a_aoclk_i2c_m0,
385 &g12a_aoclk_i2c_s0,
386 &g12a_aoclk_uart,
387 &g12a_aoclk_prod_i2c,
388 &g12a_aoclk_uart2,
389 &g12a_aoclk_ir_out,
390 &g12a_aoclk_saradc,
391 &g12a_aoclk_mailbox,
392 &g12a_aoclk_m3,
393 &g12a_aoclk_ahb_sram,
394 &g12a_aoclk_rti,
395 &g12a_aoclk_m4_fclk,
396 &g12a_aoclk_m4_hclk,
397 &g12a_aoclk_cts_oscin,
398 &g12a_aoclk_32k_by_oscin_pre,
399 &g12a_aoclk_32k_by_oscin_div,
400 &g12a_aoclk_32k_by_oscin_sel,
401 &g12a_aoclk_32k_by_oscin,
402 &g12a_aoclk_cec_pre,
403 &g12a_aoclk_cec_div,
404 &g12a_aoclk_cec_sel,
405 &g12a_aoclk_cec,
406 &g12a_aoclk_cts_rtc_oscin,
407 &g12a_aoclk_clk81,
408 &g12a_aoclk_saradc_mux,
409 &g12a_aoclk_saradc_div,
410 &g12a_aoclk_saradc_gate,
411};
412
413static const struct clk_hw_onecell_data g12a_aoclk_onecell_data = {
414 .hws = {
415 [CLKID_AO_AHB] = &g12a_aoclk_ahb.hw,
416 [CLKID_AO_IR_IN] = &g12a_aoclk_ir_in.hw,
417 [CLKID_AO_I2C_M0] = &g12a_aoclk_i2c_m0.hw,
418 [CLKID_AO_I2C_S0] = &g12a_aoclk_i2c_s0.hw,
419 [CLKID_AO_UART] = &g12a_aoclk_uart.hw,
420 [CLKID_AO_PROD_I2C] = &g12a_aoclk_prod_i2c.hw,
421 [CLKID_AO_UART2] = &g12a_aoclk_uart2.hw,
422 [CLKID_AO_IR_OUT] = &g12a_aoclk_ir_out.hw,
423 [CLKID_AO_SAR_ADC] = &g12a_aoclk_saradc.hw,
424 [CLKID_AO_MAILBOX] = &g12a_aoclk_mailbox.hw,
425 [CLKID_AO_M3] = &g12a_aoclk_m3.hw,
426 [CLKID_AO_AHB_SRAM] = &g12a_aoclk_ahb_sram.hw,
427 [CLKID_AO_RTI] = &g12a_aoclk_rti.hw,
428 [CLKID_AO_M4_FCLK] = &g12a_aoclk_m4_fclk.hw,
429 [CLKID_AO_M4_HCLK] = &g12a_aoclk_m4_hclk.hw,
430 [CLKID_AO_CLK81] = &g12a_aoclk_clk81.hw,
431 [CLKID_AO_SAR_ADC_SEL] = &g12a_aoclk_saradc_mux.hw,
432 [CLKID_AO_SAR_ADC_DIV] = &g12a_aoclk_saradc_div.hw,
433 [CLKID_AO_SAR_ADC_CLK] = &g12a_aoclk_saradc_gate.hw,
434 [CLKID_AO_CTS_OSCIN] = &g12a_aoclk_cts_oscin.hw,
435 [CLKID_AO_32K_PRE] = &g12a_aoclk_32k_by_oscin_pre.hw,
436 [CLKID_AO_32K_DIV] = &g12a_aoclk_32k_by_oscin_div.hw,
437 [CLKID_AO_32K_SEL] = &g12a_aoclk_32k_by_oscin_sel.hw,
438 [CLKID_AO_32K] = &g12a_aoclk_32k_by_oscin.hw,
439 [CLKID_AO_CEC_PRE] = &g12a_aoclk_cec_pre.hw,
440 [CLKID_AO_CEC_DIV] = &g12a_aoclk_cec_div.hw,
441 [CLKID_AO_CEC_SEL] = &g12a_aoclk_cec_sel.hw,
442 [CLKID_AO_CEC] = &g12a_aoclk_cec.hw,
443 [CLKID_AO_CTS_RTC_OSCIN] = &g12a_aoclk_cts_rtc_oscin.hw,
444 },
445 .num = NR_CLKS,
446};
447
448static const struct meson_aoclk_data g12a_aoclkc_data = {
449 .reset_reg = AO_RTI_GEN_CNTL_REG0,
450 .num_reset = ARRAY_SIZE(g12a_aoclk_reset),
451 .reset = g12a_aoclk_reset,
452 .num_clks = ARRAY_SIZE(g12a_aoclk_regmap),
453 .clks = g12a_aoclk_regmap,
454 .hw_data = &g12a_aoclk_onecell_data,
455};
456
457static const struct of_device_id g12a_aoclkc_match_table[] = {
458 {
459 .compatible = "amlogic,meson-g12a-aoclkc",
460 .data = &g12a_aoclkc_data,
461 },
462 { }
463};
464
465static struct platform_driver g12a_aoclkc_driver = {
466 .probe = meson_aoclkc_probe,
467 .driver = {
468 .name = "g12a-aoclkc",
469 .of_match_table = g12a_aoclkc_match_table,
470 },
471};
472
473builtin_platform_driver(g12a_aoclkc_driver);