Merge tag 'linux-watchdog-6.5-rc2' of git://www.linux-watchdog.org/linux-watchdog
[sfrench/cifs-2.6.git] / drivers / clk / at91 / sama5d3.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/clk-provider.h>
3 #include <linux/mfd/syscon.h>
4 #include <linux/slab.h>
5
6 #include <dt-bindings/clock/at91.h>
7
8 #include "pmc.h"
9
10 static DEFINE_SPINLOCK(mck_lock);
11
12 static const struct clk_master_characteristics mck_characteristics = {
13         .output = { .min = 0, .max = 166000000 },
14         .divisors = { 1, 2, 4, 3 },
15 };
16
17 static u8 plla_out[] = { 0 };
18
19 static u16 plla_icpll[] = { 0 };
20
21 static const struct clk_range plla_outputs[] = {
22         { .min = 400000000, .max = 1000000000 },
23 };
24
25 static const struct clk_pll_characteristics plla_characteristics = {
26         .input = { .min = 8000000, .max = 50000000 },
27         .num_output = ARRAY_SIZE(plla_outputs),
28         .output = plla_outputs,
29         .icpll = plla_icpll,
30         .out = plla_out,
31 };
32
33 static const struct clk_pcr_layout sama5d3_pcr_layout = {
34         .offset = 0x10c,
35         .cmd = BIT(12),
36         .pid_mask = GENMASK(6, 0),
37         .div_mask = GENMASK(17, 16),
38 };
39
40 static const struct {
41         char *n;
42         char *p;
43         unsigned long flags;
44         u8 id;
45 } sama5d3_systemck[] = {
46         /*
47          * ddrck feeds DDR controller and is enabled by bootloader thus we need
48          * to keep it enabled in case there is no Linux consumer for it.
49          */
50         { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL },
51         { .n = "lcdck", .p = "masterck_div", .id = 3 },
52         { .n = "smdck", .p = "smdclk",       .id = 4 },
53         { .n = "uhpck", .p = "usbck",        .id = 6 },
54         { .n = "udpck", .p = "usbck",        .id = 7 },
55         { .n = "pck0",  .p = "prog0",        .id = 8 },
56         { .n = "pck1",  .p = "prog1",        .id = 9 },
57         { .n = "pck2",  .p = "prog2",        .id = 10 },
58 };
59
60 static const struct {
61         char *n;
62         u8 id;
63         struct clk_range r;
64         unsigned long flags;
65 } sama5d3_periphck[] = {
66         { .n = "dbgu_clk", .id = 2, },
67         { .n = "hsmc_clk", .id = 5, },
68         { .n = "pioA_clk", .id = 6, },
69         { .n = "pioB_clk", .id = 7, },
70         { .n = "pioC_clk", .id = 8, },
71         { .n = "pioD_clk", .id = 9, },
72         { .n = "pioE_clk", .id = 10, },
73         { .n = "usart0_clk", .id = 12, .r = { .min = 0, .max = 83000000 }, },
74         { .n = "usart1_clk", .id = 13, .r = { .min = 0, .max = 83000000 }, },
75         { .n = "usart2_clk", .id = 14, .r = { .min = 0, .max = 83000000 }, },
76         { .n = "usart3_clk", .id = 15, .r = { .min = 0, .max = 83000000 }, },
77         { .n = "uart0_clk", .id = 16, .r = { .min = 0, .max = 83000000 }, },
78         { .n = "uart1_clk", .id = 17, .r = { .min = 0, .max = 83000000 }, },
79         { .n = "twi0_clk", .id = 18, .r = { .min = 0, .max = 41500000 }, },
80         { .n = "twi1_clk", .id = 19, .r = { .min = 0, .max = 41500000 }, },
81         { .n = "twi2_clk", .id = 20, .r = { .min = 0, .max = 41500000 }, },
82         { .n = "mci0_clk", .id = 21, },
83         { .n = "mci1_clk", .id = 22, },
84         { .n = "mci2_clk", .id = 23, },
85         { .n = "spi0_clk", .id = 24, .r = { .min = 0, .max = 166000000 }, },
86         { .n = "spi1_clk", .id = 25, .r = { .min = 0, .max = 166000000 }, },
87         { .n = "tcb0_clk", .id = 26, .r = { .min = 0, .max = 166000000 }, },
88         { .n = "tcb1_clk", .id = 27, .r = { .min = 0, .max = 166000000 }, },
89         { .n = "pwm_clk", .id = 28, },
90         { .n = "adc_clk", .id = 29, .r = { .min = 0, .max = 83000000 }, },
91         { .n = "dma0_clk", .id = 30, },
92         { .n = "dma1_clk", .id = 31, },
93         { .n = "uhphs_clk", .id = 32, },
94         { .n = "udphs_clk", .id = 33, },
95         { .n = "macb0_clk", .id = 34, },
96         { .n = "macb1_clk", .id = 35, },
97         { .n = "lcdc_clk", .id = 36, },
98         { .n = "isi_clk", .id = 37, },
99         { .n = "ssc0_clk", .id = 38, .r = { .min = 0, .max = 83000000 }, },
100         { .n = "ssc1_clk", .id = 39, .r = { .min = 0, .max = 83000000 }, },
101         { .n = "can0_clk", .id = 40, .r = { .min = 0, .max = 83000000 }, },
102         { .n = "can1_clk", .id = 41, .r = { .min = 0, .max = 83000000 }, },
103         { .n = "sha_clk", .id = 42, },
104         { .n = "aes_clk", .id = 43, },
105         { .n = "tdes_clk", .id = 44, },
106         { .n = "trng_clk", .id = 45, },
107         { .n = "fuse_clk", .id = 48, },
108         /*
109          * mpddr_clk feeds DDR controller and is enabled by bootloader thus we
110          * need to keep it enabled in case there is no Linux consumer for it.
111          */
112         { .n = "mpddr_clk", .id = 49, .flags = CLK_IS_CRITICAL },
113 };
114
115 static void __init sama5d3_pmc_setup(struct device_node *np)
116 {
117         const char *slck_name, *mainxtal_name;
118         struct pmc_data *sama5d3_pmc;
119         const char *parent_names[5];
120         struct regmap *regmap;
121         struct clk_hw *hw;
122         int i;
123         bool bypass;
124
125         i = of_property_match_string(np, "clock-names", "slow_clk");
126         if (i < 0)
127                 return;
128
129         slck_name = of_clk_get_parent_name(np, i);
130
131         i = of_property_match_string(np, "clock-names", "main_xtal");
132         if (i < 0)
133                 return;
134         mainxtal_name = of_clk_get_parent_name(np, i);
135
136         regmap = device_node_to_regmap(np);
137         if (IS_ERR(regmap))
138                 return;
139
140         sama5d3_pmc = pmc_data_allocate(PMC_PLLACK + 1,
141                                         nck(sama5d3_systemck),
142                                         nck(sama5d3_periphck), 0, 3);
143         if (!sama5d3_pmc)
144                 return;
145
146         hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000,
147                                            50000000);
148         if (IS_ERR(hw))
149                 goto err_free;
150
151         bypass = of_property_read_bool(np, "atmel,osc-bypass");
152
153         hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL,
154                                         bypass);
155         if (IS_ERR(hw))
156                 goto err_free;
157
158         parent_names[0] = "main_rc_osc";
159         parent_names[1] = "main_osc";
160         hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2);
161         if (IS_ERR(hw))
162                 goto err_free;
163
164         hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
165                                    &sama5d3_pll_layout, &plla_characteristics);
166         if (IS_ERR(hw))
167                 goto err_free;
168
169         hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack");
170         if (IS_ERR(hw))
171                 goto err_free;
172
173         sama5d3_pmc->chws[PMC_PLLACK] = hw;
174
175         hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
176         if (IS_ERR(hw))
177                 goto err_free;
178
179         sama5d3_pmc->chws[PMC_UTMI] = hw;
180
181         parent_names[0] = slck_name;
182         parent_names[1] = "mainck";
183         parent_names[2] = "plladivck";
184         parent_names[3] = "utmick";
185         hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
186                                            parent_names, NULL,
187                                            &at91sam9x5_master_layout,
188                                            &mck_characteristics, &mck_lock);
189         if (IS_ERR(hw))
190                 goto err_free;
191
192         hw = at91_clk_register_master_div(regmap, "masterck_div",
193                                           "masterck_pres", NULL,
194                                           &at91sam9x5_master_layout,
195                                           &mck_characteristics, &mck_lock,
196                                           CLK_SET_RATE_GATE, 0);
197         if (IS_ERR(hw))
198                 goto err_free;
199
200         sama5d3_pmc->chws[PMC_MCK] = hw;
201
202         parent_names[0] = "plladivck";
203         parent_names[1] = "utmick";
204         hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2);
205         if (IS_ERR(hw))
206                 goto err_free;
207
208         hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2);
209         if (IS_ERR(hw))
210                 goto err_free;
211
212         parent_names[0] = slck_name;
213         parent_names[1] = "mainck";
214         parent_names[2] = "plladivck";
215         parent_names[3] = "utmick";
216         parent_names[4] = "masterck_div";
217         for (i = 0; i < 3; i++) {
218                 char name[6];
219
220                 snprintf(name, sizeof(name), "prog%d", i);
221
222                 hw = at91_clk_register_programmable(regmap, name,
223                                                     parent_names, NULL, 5, i,
224                                                     &at91sam9x5_programmable_layout,
225                                                     NULL);
226                 if (IS_ERR(hw))
227                         goto err_free;
228
229                 sama5d3_pmc->pchws[i] = hw;
230         }
231
232         for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) {
233                 hw = at91_clk_register_system(regmap, sama5d3_systemck[i].n,
234                                               sama5d3_systemck[i].p, NULL,
235                                               sama5d3_systemck[i].id,
236                                               sama5d3_systemck[i].flags);
237                 if (IS_ERR(hw))
238                         goto err_free;
239
240                 sama5d3_pmc->shws[sama5d3_systemck[i].id] = hw;
241         }
242
243         for (i = 0; i < ARRAY_SIZE(sama5d3_periphck); i++) {
244                 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
245                                                          &sama5d3_pcr_layout,
246                                                          sama5d3_periphck[i].n,
247                                                          "masterck_div", NULL,
248                                                          sama5d3_periphck[i].id,
249                                                          &sama5d3_periphck[i].r,
250                                                          INT_MIN,
251                                                          sama5d3_periphck[i].flags);
252                 if (IS_ERR(hw))
253                         goto err_free;
254
255                 sama5d3_pmc->phws[sama5d3_periphck[i].id] = hw;
256         }
257
258         of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d3_pmc);
259
260         return;
261
262 err_free:
263         kfree(sama5d3_pmc);
264 }
265 /*
266  * The TCB is used as the clocksource so its clock is needed early. This means
267  * this can't be a platform driver.
268  */
269 CLK_OF_DECLARE(sama5d3_pmc, "atmel,sama5d3-pmc", sama5d3_pmc_setup);