1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * AM33XX Clock init
4 *
5 * Copyright (C) 2013 Texas Instruments, Inc
6 * Tero Kristo (t-kristo@ti.com)
7 */
8
9#include <linux/kernel.h>
10#include <linux/list.h>
11#include <linux/clk.h>
12#include <linux/clk-provider.h>
13#include <linux/clk/ti.h>
14#include <dt-bindings/clock/am3.h>
15
16#include "clock.h"
17
18static const char * const am3_gpio1_dbclk_parents[] __initconst = {
19 "clk-24mhz-clkctrl:0000:0",
20 NULL,
21};
22
23static const struct omap_clkctrl_bit_data am3_gpio2_bit_data[] __initconst = {
24 { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL },
25 { 0 },
26};
27
28static const struct omap_clkctrl_bit_data am3_gpio3_bit_data[] __initconst = {
29 { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL },
30 { 0 },
31};
32
33static const struct omap_clkctrl_bit_data am3_gpio4_bit_data[] __initconst = {
34 { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL },
35 { 0 },
36};
37
38static const struct omap_clkctrl_reg_data am3_l4ls_clkctrl_regs[] __initconst = {
39 { AM3_L4LS_UART6_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
40 { AM3_L4LS_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" },
41 { AM3_L4LS_ELM_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
42 { AM3_L4LS_I2C3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
43 { AM3_L4LS_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
44 { AM3_L4LS_SPI0_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
45 { AM3_L4LS_SPI1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
46 { AM3_L4LS_L4_LS_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
47 { AM3_L4LS_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
48 { AM3_L4LS_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
49 { AM3_L4LS_UART4_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
50 { AM3_L4LS_UART5_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
51 { AM3_L4LS_TIMER7_CLKCTRL, NULL, CLKF_SW_SUP, "timer7_fck" },
52 { AM3_L4LS_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "timer2_fck" },
53 { AM3_L4LS_TIMER3_CLKCTRL, NULL, CLKF_SW_SUP, "timer3_fck" },
54 { AM3_L4LS_TIMER4_CLKCTRL, NULL, CLKF_SW_SUP, "timer4_fck" },
55 { AM3_L4LS_RNG_CLKCTRL, NULL, CLKF_SW_SUP, "rng_fck" },
56 { AM3_L4LS_GPIO2_CLKCTRL, am3_gpio2_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
57 { AM3_L4LS_GPIO3_CLKCTRL, am3_gpio3_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
58 { AM3_L4LS_GPIO4_CLKCTRL, am3_gpio4_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
59 { AM3_L4LS_D_CAN0_CLKCTRL, NULL, CLKF_SW_SUP, "dcan0_fck" },
60 { AM3_L4LS_D_CAN1_CLKCTRL, NULL, CLKF_SW_SUP, "dcan1_fck" },
61 { AM3_L4LS_EPWMSS1_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
62 { AM3_L4LS_EPWMSS0_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
63 { AM3_L4LS_EPWMSS2_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
64 { AM3_L4LS_TIMER5_CLKCTRL, NULL, CLKF_SW_SUP, "timer5_fck" },
65 { AM3_L4LS_TIMER6_CLKCTRL, NULL, CLKF_SW_SUP, "timer6_fck" },
66 { AM3_L4LS_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" },
67 { AM3_L4LS_SPINLOCK_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
68 { AM3_L4LS_MAILBOX_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
69 { AM3_L4LS_OCPWP_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
70 { 0 },
71};
72
73static const struct omap_clkctrl_reg_data am3_l3s_clkctrl_regs[] __initconst = {
74 { AM3_L3S_USB_OTG_HS_CLKCTRL, NULL, CLKF_SW_SUP, "usbotg_fck" },
75 { AM3_L3S_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "l3s_gclk" },
76 { AM3_L3S_MCASP0_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp0_fck" },
77 { AM3_L3S_MCASP1_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp1_fck" },
78 { AM3_L3S_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" },
79 { 0 },
80};
81
82static const struct omap_clkctrl_reg_data am3_l3_clkctrl_regs[] __initconst = {
83 { AM3_L3_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
84 { AM3_L3_EMIF_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_ddr_m2_div2_ck" },
85 { AM3_L3_OCMCRAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
86 { AM3_L3_AES_CLKCTRL, NULL, CLKF_SW_SUP, "aes0_fck" },
87 { AM3_L3_SHAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
88 { AM3_L3_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
89 { AM3_L3_L3_INSTR_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
90 { AM3_L3_L3_MAIN_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
91 { AM3_L3_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
92 { AM3_L3_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
93 { 0 },
94};
95
96static const struct omap_clkctrl_reg_data am3_l4hs_clkctrl_regs[] __initconst = {
97 { AM3_L4HS_L4_HS_CLKCTRL, NULL, CLKF_SW_SUP, "l4hs_gclk" },
98 { 0 },
99};
100
101static const struct omap_clkctrl_reg_data am3_pruss_ocp_clkctrl_regs[] __initconst = {
102 { AM3_PRUSS_OCP_PRUSS_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "pruss_ocp_gclk" },
103 { 0 },
104};
105
106static const struct omap_clkctrl_reg_data am3_cpsw_125mhz_clkctrl_regs[] __initconst = {
107 { AM3_CPSW_125MHZ_CPGMAC0_CLKCTRL, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk" },
108 { 0 },
109};
110
111static const struct omap_clkctrl_reg_data am3_lcdc_clkctrl_regs[] __initconst = {
112 { AM3_LCDC_LCDC_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_SET_RATE_PARENT, "lcd_gclk" },
113 { 0 },
114};
115
116static const struct omap_clkctrl_reg_data am3_clk_24mhz_clkctrl_regs[] __initconst = {
117 { AM3_CLK_24MHZ_CLKDIV32K_CLKCTRL, NULL, CLKF_SW_SUP, "clkdiv32k_ck" },
118 { 0 },
119};
120
121static const char * const am3_gpio0_dbclk_parents[] __initconst = {
122 "gpio0_dbclk_mux_ck",
123 NULL,
124};
125
126static const struct omap_clkctrl_bit_data am3_gpio1_bit_data[] __initconst = {
127 { 18, TI_CLK_GATE, am3_gpio0_dbclk_parents, NULL },
128 { 0 },
129};
130
131static const struct omap_clkctrl_reg_data am3_l4_wkup_clkctrl_regs[] __initconst = {
132 { AM3_L4_WKUP_CONTROL_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_core_m4_div2_ck" },
133 { AM3_L4_WKUP_GPIO1_CLKCTRL, am3_gpio1_bit_data, CLKF_SW_SUP, "dpll_core_m4_div2_ck" },
134 { AM3_L4_WKUP_L4_WKUP_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_core_m4_div2_ck" },
135 { AM3_L4_WKUP_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" },
136 { AM3_L4_WKUP_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" },
137 { AM3_L4_WKUP_ADC_TSC_CLKCTRL, NULL, CLKF_SW_SUP, "adc_tsc_fck" },
138 { AM3_L4_WKUP_SMARTREFLEX0_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex0_fck" },
139 { AM3_L4_WKUP_TIMER1_CLKCTRL, NULL, CLKF_SW_SUP, "timer1_fck" },
140 { AM3_L4_WKUP_SMARTREFLEX1_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex1_fck" },
141 { AM3_L4_WKUP_WD_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "wdt1_fck" },
142 { 0 },
143};
144
145static const char * const am3_dbg_sysclk_ck_parents[] __initconst = {
146 "sys_clkin_ck",
147 NULL,
148};
149
150static const char * const am3_trace_pmd_clk_mux_ck_parents[] __initconst = {
151 "l3-aon-clkctrl:0000:19",
152 "l3-aon-clkctrl:0000:30",
153 NULL,
154};
155
156static const char * const am3_trace_clk_div_ck_parents[] __initconst = {
157 "l3-aon-clkctrl:0000:20",
158 NULL,
159};
160
161static const struct omap_clkctrl_div_data am3_trace_clk_div_ck_data __initconst = {
162 .max_div = 64,
163 .flags = CLK_DIVIDER_POWER_OF_TWO,
164};
165
166static const char * const am3_stm_clk_div_ck_parents[] __initconst = {
167 "l3-aon-clkctrl:0000:22",
168 NULL,
169};
170
171static const struct omap_clkctrl_div_data am3_stm_clk_div_ck_data __initconst = {
172 .max_div = 64,
173 .flags = CLK_DIVIDER_POWER_OF_TWO,
174};
175
176static const char * const am3_dbg_clka_ck_parents[] __initconst = {
177 "dpll_core_m4_ck",
178 NULL,
179};
180
181static const struct omap_clkctrl_bit_data am3_debugss_bit_data[] __initconst = {
182 { 19, TI_CLK_GATE, am3_dbg_sysclk_ck_parents, NULL },
183 { 20, TI_CLK_MUX, am3_trace_pmd_clk_mux_ck_parents, NULL },
184 { 22, TI_CLK_MUX, am3_trace_pmd_clk_mux_ck_parents, NULL },
185 { 24, TI_CLK_DIVIDER, am3_trace_clk_div_ck_parents, &am3_trace_clk_div_ck_data },
186 { 27, TI_CLK_DIVIDER, am3_stm_clk_div_ck_parents, &am3_stm_clk_div_ck_data },
187 { 30, TI_CLK_GATE, am3_dbg_clka_ck_parents, NULL },
188 { 0 },
189};
190
191static const struct omap_clkctrl_reg_data am3_l3_aon_clkctrl_regs[] __initconst = {
192 { AM3_L3_AON_DEBUGSS_CLKCTRL, am3_debugss_bit_data, CLKF_SW_SUP, "l3-aon-clkctrl:0000:24" },
193 { 0 },
194};
195
196static const struct omap_clkctrl_reg_data am3_l4_wkup_aon_clkctrl_regs[] __initconst = {
197 { AM3_L4_WKUP_AON_WKUP_M3_CLKCTRL, NULL, CLKF_NO_IDLEST, "dpll_core_m4_div2_ck" },
198 { 0 },
199};
200
201static const struct omap_clkctrl_reg_data am3_mpu_clkctrl_regs[] __initconst = {
202 { AM3_MPU_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_mpu_m2_ck" },
203 { 0 },
204};
205
206static const struct omap_clkctrl_reg_data am3_l4_rtc_clkctrl_regs[] __initconst = {
207 { AM3_L4_RTC_RTC_CLKCTRL, NULL, CLKF_SW_SUP, "clk-24mhz-clkctrl:0000:0" },
208 { 0 },
209};
210
211static const struct omap_clkctrl_reg_data am3_gfx_l3_clkctrl_regs[] __initconst = {
212 { AM3_GFX_L3_GFX_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "gfx_fck_div_ck" },
213 { 0 },
214};
215
216static const struct omap_clkctrl_reg_data am3_l4_cefuse_clkctrl_regs[] __initconst = {
217 { AM3_L4_CEFUSE_CEFUSE_CLKCTRL, NULL, CLKF_SW_SUP, "sys_clkin_ck" },
218 { 0 },
219};
220
221const struct omap_clkctrl_data am3_clkctrl_data[] __initconst = {
222 { 0x44e00038, am3_l4ls_clkctrl_regs },
223 { 0x44e0001c, am3_l3s_clkctrl_regs },
224 { 0x44e00024, am3_l3_clkctrl_regs },
225 { 0x44e00120, am3_l4hs_clkctrl_regs },
226 { 0x44e000e8, am3_pruss_ocp_clkctrl_regs },
227 { 0x44e00000, am3_cpsw_125mhz_clkctrl_regs },
228 { 0x44e00018, am3_lcdc_clkctrl_regs },
229 { 0x44e0014c, am3_clk_24mhz_clkctrl_regs },
230 { 0x44e00400, am3_l4_wkup_clkctrl_regs },
231 { 0x44e00414, am3_l3_aon_clkctrl_regs },
232 { 0x44e004b0, am3_l4_wkup_aon_clkctrl_regs },
233 { 0x44e00600, am3_mpu_clkctrl_regs },
234 { 0x44e00800, am3_l4_rtc_clkctrl_regs },
235 { 0x44e00900, am3_gfx_l3_clkctrl_regs },
236 { 0x44e00a00, am3_l4_cefuse_clkctrl_regs },
237 { 0 },
238};
239
240static struct ti_dt_clk am33xx_clks[] = {
241 DT_CLK(NULL, "timer_32k_ck", "clk-24mhz-clkctrl:0000:0"),
242 DT_CLK(NULL, "timer_sys_ck", "sys_clkin_ck"),
243 DT_CLK(NULL, "clkdiv32k_ick", "clk-24mhz-clkctrl:0000:0"),
244 DT_CLK(NULL, "dbg_clka_ck", "l3-aon-clkctrl:0000:30"),
245 DT_CLK(NULL, "dbg_sysclk_ck", "l3-aon-clkctrl:0000:19"),
246 DT_CLK(NULL, "gpio0_dbclk", "l4-wkup-clkctrl:0008:18"),
247 DT_CLK(NULL, "gpio1_dbclk", "l4ls-clkctrl:0074:18"),
248 DT_CLK(NULL, "gpio2_dbclk", "l4ls-clkctrl:0078:18"),
249 DT_CLK(NULL, "gpio3_dbclk", "l4ls-clkctrl:007c:18"),
250 DT_CLK(NULL, "stm_clk_div_ck", "l3-aon-clkctrl:0000:27"),
251 DT_CLK(NULL, "stm_pmd_clock_mux_ck", "l3-aon-clkctrl:0000:22"),
252 DT_CLK(NULL, "trace_clk_div_ck", "l3-aon-clkctrl:0000:24"),
253 DT_CLK(NULL, "trace_pmd_clk_mux_ck", "l3-aon-clkctrl:0000:20"),
254 { .node_name = NULL },
255};
256
257static const char *enable_init_clks[] = {
258 "dpll_ddr_m2_ck",
259 "dpll_mpu_m2_ck",
260 "l3_gclk",
261 /* AM3_L3_L3_MAIN_CLKCTRL, needed during suspend */
262 "l3-clkctrl:00bc:0",
263 "l4hs_gclk",
264 "l4fw_gclk",
265 "l4ls_gclk",
266 /* Required for external peripherals like, Audio codecs */
267 "clkout2_ck",
268};
269
270int __init am33xx_dt_clk_init(void)
271{
272 struct clk *clk1, *clk2;
273
274 ti_dt_clocks_register(oclks: am33xx_clks);
275
276 omap2_clk_disable_autoidle_all();
277
278 ti_clk_add_aliases();
279
280 omap2_clk_enable_init_clocks(clk_names: enable_init_clks,
281 ARRAY_SIZE(enable_init_clks));
282
283 /* TRM ERRATA: Timer 3 & 6 default parent (TCLKIN) may not be always
284 * physically present, in such a case HWMOD enabling of
285 * clock would be failure with default parent. And timer
286 * probe thinks clock is already enabled, this leads to
287 * crash upon accessing timer 3 & 6 registers in probe.
288 * Fix by setting parent of both these timers to master
289 * oscillator clock.
290 */
291
292 clk1 = clk_get_sys(NULL, con_id: "sys_clkin_ck");
293 clk2 = clk_get_sys(NULL, con_id: "timer3_fck");
294 clk_set_parent(clk: clk2, parent: clk1);
295
296 clk2 = clk_get_sys(NULL, con_id: "timer6_fck");
297 clk_set_parent(clk: clk2, parent: clk1);
298 /*
299 * The On-Chip 32K RC Osc clock is not an accurate clock-source as per
300 * the design/spec, so as a result, for example, timer which supposed
301 * to get expired @60Sec, but will expire somewhere ~@40Sec, which is
302 * not expected by any use-case, so change WDT1 clock source to PRCM
303 * 32KHz clock.
304 */
305 clk1 = clk_get_sys(NULL, con_id: "wdt1_fck");
306 clk2 = clk_get_sys(NULL, con_id: "clkdiv32k_ick");
307 clk_set_parent(clk: clk1, parent: clk2);
308
309 return 0;
310}
311

source code of linux/drivers/clk/ti/clk-33xx.c