1 // SPDX-License-Identifier: GPL-2.0+
3 * Amlogic Meson-AXG Clock Controller Driver
5 * Copyright (c) 2016 Baylibre SAS.
6 * Author: Michael Turquette <mturquette@baylibre.com>
8 * Copyright (c) 2019 Baylibre SAS.
9 * Author: Neil Armstrong <narmstrong@baylibre.com>
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 <linux/module.h>
16 #include "meson-aoclk.h"
18 #include "clk-regmap.h"
19 #include "clk-dualdiv.h"
21 #include <dt-bindings/clock/g12a-aoclkc.h>
22 #include <dt-bindings/reset/g12a-aoclkc.h>
25 * AO Configuration Clock registers offsets
26 * Register offsets from the data sheet must be multiplied by 4.
28 #define AO_RTI_STATUS_REG3 0x0C
29 #define AO_RTI_PWR_CNTL_REG0 0x10
30 #define AO_RTI_GEN_CNTL_REG0 0x40
31 #define AO_CLK_GATE0 0x4c
32 #define AO_CLK_GATE0_SP 0x50
33 #define AO_OSCIN_CNTL 0x58
34 #define AO_CEC_CLK_CNTL_REG0 0x74
35 #define AO_CEC_CLK_CNTL_REG1 0x78
36 #define AO_SAR_CLK 0x90
37 #define AO_RTC_ALT_CLK_CNTL0 0x94
38 #define AO_RTC_ALT_CLK_CNTL1 0x98
41 * Like every other peripheral clock gate in Amlogic Clock drivers,
42 * we are using CLK_IGNORE_UNUSED here, so we keep the state of the
43 * bootloader. The goal is to remove this flag at some point.
44 * Actually removing it will require some extensive test to be done safely.
46 #define AXG_AO_GATE(_name, _reg, _bit) \
47 static struct clk_regmap g12a_aoclk_##_name = { \
48 .data = &(struct clk_regmap_gate_data) { \
52 .hw.init = &(struct clk_init_data) { \
53 .name = "g12a_ao_" #_name, \
54 .ops = &clk_regmap_gate_ops, \
55 .parent_data = &(const struct clk_parent_data) { \
56 .fw_name = "mpeg-clk", \
59 .flags = CLK_IGNORE_UNUSED, \
63 AXG_AO_GATE(ahb, AO_CLK_GATE0, 0);
64 AXG_AO_GATE(ir_in, AO_CLK_GATE0, 1);
65 AXG_AO_GATE(i2c_m0, AO_CLK_GATE0, 2);
66 AXG_AO_GATE(i2c_s0, AO_CLK_GATE0, 3);
67 AXG_AO_GATE(uart, AO_CLK_GATE0, 4);
68 AXG_AO_GATE(prod_i2c, AO_CLK_GATE0, 5);
69 AXG_AO_GATE(uart2, AO_CLK_GATE0, 6);
70 AXG_AO_GATE(ir_out, AO_CLK_GATE0, 7);
71 AXG_AO_GATE(saradc, AO_CLK_GATE0, 8);
72 AXG_AO_GATE(mailbox, AO_CLK_GATE0_SP, 0);
73 AXG_AO_GATE(m3, AO_CLK_GATE0_SP, 1);
74 AXG_AO_GATE(ahb_sram, AO_CLK_GATE0_SP, 2);
75 AXG_AO_GATE(rti, AO_CLK_GATE0_SP, 3);
76 AXG_AO_GATE(m4_fclk, AO_CLK_GATE0_SP, 4);
77 AXG_AO_GATE(m4_hclk, AO_CLK_GATE0_SP, 5);
79 static struct clk_regmap g12a_aoclk_cts_oscin = {
80 .data = &(struct clk_regmap_gate_data){
81 .offset = AO_RTI_PWR_CNTL_REG0,
84 .hw.init = &(struct clk_init_data){
86 .ops = &clk_regmap_gate_ro_ops,
87 .parent_data = &(const struct clk_parent_data) {
94 static const struct meson_clk_dualdiv_param g12a_32k_div_table[] = {
104 /* 32k_by_oscin clock */
106 static struct clk_regmap g12a_aoclk_32k_by_oscin_pre = {
107 .data = &(struct clk_regmap_gate_data){
108 .offset = AO_RTC_ALT_CLK_CNTL0,
111 .hw.init = &(struct clk_init_data){
112 .name = "g12a_ao_32k_by_oscin_pre",
113 .ops = &clk_regmap_gate_ops,
114 .parent_hws = (const struct clk_hw *[]) {
115 &g12a_aoclk_cts_oscin.hw
121 static struct clk_regmap g12a_aoclk_32k_by_oscin_div = {
122 .data = &(struct meson_clk_dualdiv_data){
124 .reg_off = AO_RTC_ALT_CLK_CNTL0,
129 .reg_off = AO_RTC_ALT_CLK_CNTL0,
134 .reg_off = AO_RTC_ALT_CLK_CNTL1,
139 .reg_off = AO_RTC_ALT_CLK_CNTL1,
144 .reg_off = AO_RTC_ALT_CLK_CNTL0,
148 .table = g12a_32k_div_table,
150 .hw.init = &(struct clk_init_data){
151 .name = "g12a_ao_32k_by_oscin_div",
152 .ops = &meson_clk_dualdiv_ops,
153 .parent_hws = (const struct clk_hw *[]) {
154 &g12a_aoclk_32k_by_oscin_pre.hw
160 static struct clk_regmap g12a_aoclk_32k_by_oscin_sel = {
161 .data = &(struct clk_regmap_mux_data) {
162 .offset = AO_RTC_ALT_CLK_CNTL1,
165 .flags = CLK_MUX_ROUND_CLOSEST,
167 .hw.init = &(struct clk_init_data){
168 .name = "g12a_ao_32k_by_oscin_sel",
169 .ops = &clk_regmap_mux_ops,
170 .parent_hws = (const struct clk_hw *[]) {
171 &g12a_aoclk_32k_by_oscin_div.hw,
172 &g12a_aoclk_32k_by_oscin_pre.hw,
175 .flags = CLK_SET_RATE_PARENT,
179 static struct clk_regmap g12a_aoclk_32k_by_oscin = {
180 .data = &(struct clk_regmap_gate_data){
181 .offset = AO_RTC_ALT_CLK_CNTL0,
184 .hw.init = &(struct clk_init_data){
185 .name = "g12a_ao_32k_by_oscin",
186 .ops = &clk_regmap_gate_ops,
187 .parent_hws = (const struct clk_hw *[]) {
188 &g12a_aoclk_32k_by_oscin_sel.hw
191 .flags = CLK_SET_RATE_PARENT,
197 static struct clk_regmap g12a_aoclk_cec_pre = {
198 .data = &(struct clk_regmap_gate_data){
199 .offset = AO_CEC_CLK_CNTL_REG0,
202 .hw.init = &(struct clk_init_data){
203 .name = "g12a_ao_cec_pre",
204 .ops = &clk_regmap_gate_ops,
205 .parent_hws = (const struct clk_hw *[]) {
206 &g12a_aoclk_cts_oscin.hw
212 static struct clk_regmap g12a_aoclk_cec_div = {
213 .data = &(struct meson_clk_dualdiv_data){
215 .reg_off = AO_CEC_CLK_CNTL_REG0,
220 .reg_off = AO_CEC_CLK_CNTL_REG0,
225 .reg_off = AO_CEC_CLK_CNTL_REG1,
230 .reg_off = AO_CEC_CLK_CNTL_REG1,
235 .reg_off = AO_CEC_CLK_CNTL_REG0,
239 .table = g12a_32k_div_table,
241 .hw.init = &(struct clk_init_data){
242 .name = "g12a_ao_cec_div",
243 .ops = &meson_clk_dualdiv_ops,
244 .parent_hws = (const struct clk_hw *[]) {
245 &g12a_aoclk_cec_pre.hw
251 static struct clk_regmap g12a_aoclk_cec_sel = {
252 .data = &(struct clk_regmap_mux_data) {
253 .offset = AO_CEC_CLK_CNTL_REG1,
256 .flags = CLK_MUX_ROUND_CLOSEST,
258 .hw.init = &(struct clk_init_data){
259 .name = "g12a_ao_cec_sel",
260 .ops = &clk_regmap_mux_ops,
261 .parent_hws = (const struct clk_hw *[]) {
262 &g12a_aoclk_cec_div.hw,
263 &g12a_aoclk_cec_pre.hw,
266 .flags = CLK_SET_RATE_PARENT,
270 static struct clk_regmap g12a_aoclk_cec = {
271 .data = &(struct clk_regmap_gate_data){
272 .offset = AO_CEC_CLK_CNTL_REG0,
275 .hw.init = &(struct clk_init_data){
276 .name = "g12a_ao_cec",
277 .ops = &clk_regmap_gate_ops,
278 .parent_hws = (const struct clk_hw *[]) {
279 &g12a_aoclk_cec_sel.hw
282 .flags = CLK_SET_RATE_PARENT,
286 static struct clk_regmap g12a_aoclk_cts_rtc_oscin = {
287 .data = &(struct clk_regmap_mux_data) {
288 .offset = AO_RTI_PWR_CNTL_REG0,
291 .flags = CLK_MUX_ROUND_CLOSEST,
293 .hw.init = &(struct clk_init_data){
294 .name = "g12a_ao_cts_rtc_oscin",
295 .ops = &clk_regmap_mux_ops,
296 .parent_data = (const struct clk_parent_data []) {
297 { .hw = &g12a_aoclk_32k_by_oscin.hw },
298 { .fw_name = "ext-32k-0", },
301 .flags = CLK_SET_RATE_PARENT,
305 static struct clk_regmap g12a_aoclk_clk81 = {
306 .data = &(struct clk_regmap_mux_data) {
307 .offset = AO_RTI_PWR_CNTL_REG0,
310 .flags = CLK_MUX_ROUND_CLOSEST,
312 .hw.init = &(struct clk_init_data){
313 .name = "g12a_ao_clk81",
314 .ops = &clk_regmap_mux_ro_ops,
315 .parent_data = (const struct clk_parent_data []) {
316 { .fw_name = "mpeg-clk", },
317 { .hw = &g12a_aoclk_cts_rtc_oscin.hw },
320 .flags = CLK_SET_RATE_PARENT,
324 static struct clk_regmap g12a_aoclk_saradc_mux = {
325 .data = &(struct clk_regmap_mux_data) {
326 .offset = AO_SAR_CLK,
330 .hw.init = &(struct clk_init_data){
331 .name = "g12a_ao_saradc_mux",
332 .ops = &clk_regmap_mux_ops,
333 .parent_data = (const struct clk_parent_data []) {
334 { .fw_name = "xtal", },
335 { .hw = &g12a_aoclk_clk81.hw },
341 static struct clk_regmap g12a_aoclk_saradc_div = {
342 .data = &(struct clk_regmap_div_data) {
343 .offset = AO_SAR_CLK,
347 .hw.init = &(struct clk_init_data){
348 .name = "g12a_ao_saradc_div",
349 .ops = &clk_regmap_divider_ops,
350 .parent_hws = (const struct clk_hw *[]) {
351 &g12a_aoclk_saradc_mux.hw
354 .flags = CLK_SET_RATE_PARENT,
358 static struct clk_regmap g12a_aoclk_saradc_gate = {
359 .data = &(struct clk_regmap_gate_data) {
360 .offset = AO_SAR_CLK,
363 .hw.init = &(struct clk_init_data){
364 .name = "g12a_ao_saradc_gate",
365 .ops = &clk_regmap_gate_ops,
366 .parent_hws = (const struct clk_hw *[]) {
367 &g12a_aoclk_saradc_div.hw
370 .flags = CLK_SET_RATE_PARENT,
374 static const unsigned int g12a_aoclk_reset[] = {
375 [RESET_AO_IR_IN] = 16,
376 [RESET_AO_UART] = 17,
377 [RESET_AO_I2C_M] = 18,
378 [RESET_AO_I2C_S] = 19,
379 [RESET_AO_SAR_ADC] = 20,
380 [RESET_AO_UART2] = 22,
381 [RESET_AO_IR_OUT] = 23,
384 static struct clk_regmap *g12a_aoclk_regmap[] = {
390 &g12a_aoclk_prod_i2c,
396 &g12a_aoclk_ahb_sram,
400 &g12a_aoclk_cts_oscin,
401 &g12a_aoclk_32k_by_oscin_pre,
402 &g12a_aoclk_32k_by_oscin_div,
403 &g12a_aoclk_32k_by_oscin_sel,
404 &g12a_aoclk_32k_by_oscin,
409 &g12a_aoclk_cts_rtc_oscin,
411 &g12a_aoclk_saradc_mux,
412 &g12a_aoclk_saradc_div,
413 &g12a_aoclk_saradc_gate,
416 static struct clk_hw *g12a_aoclk_hw_clks[] = {
417 [CLKID_AO_AHB] = &g12a_aoclk_ahb.hw,
418 [CLKID_AO_IR_IN] = &g12a_aoclk_ir_in.hw,
419 [CLKID_AO_I2C_M0] = &g12a_aoclk_i2c_m0.hw,
420 [CLKID_AO_I2C_S0] = &g12a_aoclk_i2c_s0.hw,
421 [CLKID_AO_UART] = &g12a_aoclk_uart.hw,
422 [CLKID_AO_PROD_I2C] = &g12a_aoclk_prod_i2c.hw,
423 [CLKID_AO_UART2] = &g12a_aoclk_uart2.hw,
424 [CLKID_AO_IR_OUT] = &g12a_aoclk_ir_out.hw,
425 [CLKID_AO_SAR_ADC] = &g12a_aoclk_saradc.hw,
426 [CLKID_AO_MAILBOX] = &g12a_aoclk_mailbox.hw,
427 [CLKID_AO_M3] = &g12a_aoclk_m3.hw,
428 [CLKID_AO_AHB_SRAM] = &g12a_aoclk_ahb_sram.hw,
429 [CLKID_AO_RTI] = &g12a_aoclk_rti.hw,
430 [CLKID_AO_M4_FCLK] = &g12a_aoclk_m4_fclk.hw,
431 [CLKID_AO_M4_HCLK] = &g12a_aoclk_m4_hclk.hw,
432 [CLKID_AO_CLK81] = &g12a_aoclk_clk81.hw,
433 [CLKID_AO_SAR_ADC_SEL] = &g12a_aoclk_saradc_mux.hw,
434 [CLKID_AO_SAR_ADC_DIV] = &g12a_aoclk_saradc_div.hw,
435 [CLKID_AO_SAR_ADC_CLK] = &g12a_aoclk_saradc_gate.hw,
436 [CLKID_AO_CTS_OSCIN] = &g12a_aoclk_cts_oscin.hw,
437 [CLKID_AO_32K_PRE] = &g12a_aoclk_32k_by_oscin_pre.hw,
438 [CLKID_AO_32K_DIV] = &g12a_aoclk_32k_by_oscin_div.hw,
439 [CLKID_AO_32K_SEL] = &g12a_aoclk_32k_by_oscin_sel.hw,
440 [CLKID_AO_32K] = &g12a_aoclk_32k_by_oscin.hw,
441 [CLKID_AO_CEC_PRE] = &g12a_aoclk_cec_pre.hw,
442 [CLKID_AO_CEC_DIV] = &g12a_aoclk_cec_div.hw,
443 [CLKID_AO_CEC_SEL] = &g12a_aoclk_cec_sel.hw,
444 [CLKID_AO_CEC] = &g12a_aoclk_cec.hw,
445 [CLKID_AO_CTS_RTC_OSCIN] = &g12a_aoclk_cts_rtc_oscin.hw,
448 static 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,
455 .hws = g12a_aoclk_hw_clks,
456 .num = ARRAY_SIZE(g12a_aoclk_hw_clks),
460 static const struct of_device_id g12a_aoclkc_match_table[] = {
462 .compatible = "amlogic,meson-g12a-aoclkc",
463 .data = &g12a_aoclkc_data,
467 MODULE_DEVICE_TABLE(of, g12a_aoclkc_match_table);
469 static struct platform_driver g12a_aoclkc_driver = {
470 .probe = meson_aoclkc_probe,
472 .name = "g12a-aoclkc",
473 .of_match_table = g12a_aoclkc_match_table,
477 module_platform_driver(g12a_aoclkc_driver);
478 MODULE_LICENSE("GPL v2");