1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2017 Icenowy Zheng <icenowy@aosc.io>
4 */
5
6 #include <linux/clk.h>
7 #include <linux/clk-provider.h>
8 #include <linux/of_address.h>
9 #include <linux/of_platform.h>
10 #include <linux/platform_device.h>
11 #include <linux/reset.h>
12
13 #include "ccu_common.h"
14 #include "ccu_div.h"
15 #include "ccu_gate.h"
16 #include "ccu_reset.h"
17
18 #include "ccu-sun8i-de2.h"
19
20 static SUNXI_CCU_GATE(bus_mixer0_clk, "bus-mixer0", "bus-de",
21 0x04, BIT(0), 0);
22 static SUNXI_CCU_GATE(bus_mixer1_clk, "bus-mixer1", "bus-de",
23 0x04, BIT(1), 0);
24 static SUNXI_CCU_GATE(bus_wb_clk, "bus-wb", "bus-de",
25 0x04, BIT(2), 0);
26 static SUNXI_CCU_GATE(bus_rot_clk, "bus-rot", "bus-de",
27 0x04, BIT(3), 0);
28
29 static SUNXI_CCU_GATE(mixer0_clk, "mixer0", "mixer0-div",
30 0x00, BIT(0), CLK_SET_RATE_PARENT);
31 static SUNXI_CCU_GATE(mixer1_clk, "mixer1", "mixer1-div",
32 0x00, BIT(1), CLK_SET_RATE_PARENT);
33 static SUNXI_CCU_GATE(wb_clk, "wb", "wb-div",
34 0x00, BIT(2), CLK_SET_RATE_PARENT);
35 static SUNXI_CCU_GATE(rot_clk, "rot", "rot-div",
36 0x00, BIT(3), CLK_SET_RATE_PARENT);
37
38 static SUNXI_CCU_M(mixer0_div_clk, "mixer0-div", "de", 0x0c, 0, 4,
39 CLK_SET_RATE_PARENT);
40 static SUNXI_CCU_M(mixer1_div_clk, "mixer1-div", "de", 0x0c, 4, 4,
41 CLK_SET_RATE_PARENT);
42 static SUNXI_CCU_M(wb_div_clk, "wb-div", "de", 0x0c, 8, 4,
43 CLK_SET_RATE_PARENT);
44 static SUNXI_CCU_M(rot_div_clk, "rot-div", "de", 0x0c, 0x0c, 4,
45 CLK_SET_RATE_PARENT);
46
47 static SUNXI_CCU_M(mixer0_div_a83_clk, "mixer0-div", "pll-de", 0x0c, 0, 4,
48 CLK_SET_RATE_PARENT);
49 static SUNXI_CCU_M(mixer1_div_a83_clk, "mixer1-div", "pll-de", 0x0c, 4, 4,
50 CLK_SET_RATE_PARENT);
51 static SUNXI_CCU_M(wb_div_a83_clk, "wb-div", "pll-de", 0x0c, 8, 4,
52 CLK_SET_RATE_PARENT);
53
54 static struct ccu_common *sun50i_h6_de3_clks[] = {
55 &mixer0_clk.common,
56 &mixer1_clk.common,
57 &wb_clk.common,
58
59 &bus_mixer0_clk.common,
60 &bus_mixer1_clk.common,
61 &bus_wb_clk.common,
62
63 &mixer0_div_clk.common,
64 &mixer1_div_clk.common,
65 &wb_div_clk.common,
66
67 &bus_rot_clk.common,
68 &rot_clk.common,
69 &rot_div_clk.common,
70 };
71
72 static struct ccu_common *sun8i_a83t_de2_clks[] = {
73 &mixer0_clk.common,
74 &mixer1_clk.common,
75 &wb_clk.common,
76
77 &bus_mixer0_clk.common,
78 &bus_mixer1_clk.common,
79 &bus_wb_clk.common,
80
81 &mixer0_div_a83_clk.common,
82 &mixer1_div_a83_clk.common,
83 &wb_div_a83_clk.common,
84 };
85
86 static struct ccu_common *sun8i_h3_de2_clks[] = {
87 &mixer0_clk.common,
88 &mixer1_clk.common,
89 &wb_clk.common,
90
91 &bus_mixer0_clk.common,
92 &bus_mixer1_clk.common,
93 &bus_wb_clk.common,
94
95 &mixer0_div_clk.common,
96 &mixer1_div_clk.common,
97 &wb_div_clk.common,
98 };
99
100 static struct ccu_common *sun8i_v3s_de2_clks[] = {
101 &mixer0_clk.common,
102 &wb_clk.common,
103
104 &bus_mixer0_clk.common,
105 &bus_wb_clk.common,
106
107 &mixer0_div_clk.common,
108 &wb_div_clk.common,
109 };
110
111 static struct clk_hw_onecell_data sun8i_a83t_de2_hw_clks = {
112 .hws = {
113 [CLK_MIXER0] = &mixer0_clk.common.hw,
114 [CLK_MIXER1] = &mixer1_clk.common.hw,
115 [CLK_WB] = &wb_clk.common.hw,
116
117 [CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw,
118 [CLK_BUS_MIXER1] = &bus_mixer1_clk.common.hw,
119 [CLK_BUS_WB] = &bus_wb_clk.common.hw,
120
121 [CLK_MIXER0_DIV] = &mixer0_div_a83_clk.common.hw,
122 [CLK_MIXER1_DIV] = &mixer1_div_a83_clk.common.hw,
123 [CLK_WB_DIV] = &wb_div_a83_clk.common.hw,
124 },
125 .num = CLK_NUMBER_WITHOUT_ROT,
126 };
127
128 static struct clk_hw_onecell_data sun8i_h3_de2_hw_clks = {
129 .hws = {
130 [CLK_MIXER0] = &mixer0_clk.common.hw,
131 [CLK_MIXER1] = &mixer1_clk.common.hw,
132 [CLK_WB] = &wb_clk.common.hw,
133
134 [CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw,
135 [CLK_BUS_MIXER1] = &bus_mixer1_clk.common.hw,
136 [CLK_BUS_WB] = &bus_wb_clk.common.hw,
137
138 [CLK_MIXER0_DIV] = &mixer0_div_clk.common.hw,
139 [CLK_MIXER1_DIV] = &mixer1_div_clk.common.hw,
140 [CLK_WB_DIV] = &wb_div_clk.common.hw,
141 },
142 .num = CLK_NUMBER_WITHOUT_ROT,
143 };
144
145 static struct clk_hw_onecell_data sun8i_v3s_de2_hw_clks = {
146 .hws = {
147 [CLK_MIXER0] = &mixer0_clk.common.hw,
148 [CLK_WB] = &wb_clk.common.hw,
149
150 [CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw,
151 [CLK_BUS_WB] = &bus_wb_clk.common.hw,
152
153 [CLK_MIXER0_DIV] = &mixer0_div_clk.common.hw,
154 [CLK_WB_DIV] = &wb_div_clk.common.hw,
155 },
156 .num = CLK_NUMBER_WITHOUT_ROT,
157 };
158
159 static struct clk_hw_onecell_data sun50i_h6_de3_hw_clks = {
160 .hws = {
161 [CLK_MIXER0] = &mixer0_clk.common.hw,
162 [CLK_MIXER1] = &mixer1_clk.common.hw,
163 [CLK_WB] = &wb_clk.common.hw,
164 [CLK_ROT] = &rot_clk.common.hw,
165
166 [CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw,
167 [CLK_BUS_MIXER1] = &bus_mixer1_clk.common.hw,
168 [CLK_BUS_WB] = &bus_wb_clk.common.hw,
169 [CLK_BUS_ROT] = &bus_rot_clk.common.hw,
170
171 [CLK_MIXER0_DIV] = &mixer0_div_clk.common.hw,
172 [CLK_MIXER1_DIV] = &mixer1_div_clk.common.hw,
173 [CLK_WB_DIV] = &wb_div_clk.common.hw,
174 [CLK_ROT_DIV] = &rot_div_clk.common.hw,
175 },
176 .num = CLK_NUMBER_WITH_ROT,
177 };
178
179 static struct ccu_reset_map sun8i_a83t_de2_resets[] = {
180 [RST_MIXER0] = { 0x08, BIT(0) },
181 /*
182 * For A83T, H3 and R40, mixer1 reset line is shared with wb, so
183 * only RST_WB is exported here.
184 * For V3s there's just no mixer1, so it also shares this struct.
185 */
186 [RST_WB] = { 0x08, BIT(2) },
187 };
188
189 static struct ccu_reset_map sun50i_a64_de2_resets[] = {
190 [RST_MIXER0] = { 0x08, BIT(0) },
191 [RST_MIXER1] = { 0x08, BIT(1) },
192 [RST_WB] = { 0x08, BIT(2) },
193 };
194
195 static struct ccu_reset_map sun50i_h6_de3_resets[] = {
196 [RST_MIXER0] = { 0x08, BIT(0) },
197 [RST_MIXER1] = { 0x08, BIT(1) },
198 [RST_WB] = { 0x08, BIT(2) },
199 [RST_ROT] = { 0x08, BIT(3) },
200 };
201
202 static const struct sunxi_ccu_desc sun8i_a83t_de2_clk_desc = {
203 .ccu_clks = sun8i_a83t_de2_clks,
204 .num_ccu_clks = ARRAY_SIZE(sun8i_a83t_de2_clks),
205
206 .hw_clks = &sun8i_a83t_de2_hw_clks,
207
208 .resets = sun8i_a83t_de2_resets,
209 .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
210 };
211
212 static const struct sunxi_ccu_desc sun8i_h3_de2_clk_desc = {
213 .ccu_clks = sun8i_h3_de2_clks,
214 .num_ccu_clks = ARRAY_SIZE(sun8i_h3_de2_clks),
215
216 .hw_clks = &sun8i_h3_de2_hw_clks,
217
218 .resets = sun8i_a83t_de2_resets,
219 .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
220 };
221
222 static const struct sunxi_ccu_desc sun50i_a64_de2_clk_desc = {
223 .ccu_clks = sun8i_h3_de2_clks,
224 .num_ccu_clks = ARRAY_SIZE(sun8i_h3_de2_clks),
225
226 .hw_clks = &sun8i_h3_de2_hw_clks,
227
228 .resets = sun50i_a64_de2_resets,
229 .num_resets = ARRAY_SIZE(sun50i_a64_de2_resets),
230 };
231
232 static const struct sunxi_ccu_desc sun50i_h6_de3_clk_desc = {
233 .ccu_clks = sun50i_h6_de3_clks,
234 .num_ccu_clks = ARRAY_SIZE(sun50i_h6_de3_clks),
235
236 .hw_clks = &sun50i_h6_de3_hw_clks,
237
238 .resets = sun50i_h6_de3_resets,
239 .num_resets = ARRAY_SIZE(sun50i_h6_de3_resets),
240 };
241
242 static const struct sunxi_ccu_desc sun8i_v3s_de2_clk_desc = {
243 .ccu_clks = sun8i_v3s_de2_clks,
244 .num_ccu_clks = ARRAY_SIZE(sun8i_v3s_de2_clks),
245
246 .hw_clks = &sun8i_v3s_de2_hw_clks,
247
248 .resets = sun8i_a83t_de2_resets,
249 .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
250 };
251
sunxi_de2_clk_probe(struct platform_device * pdev)252 static int sunxi_de2_clk_probe(struct platform_device *pdev)
253 {
254 struct resource *res;
255 struct clk *bus_clk, *mod_clk;
256 struct reset_control *rstc;
257 void __iomem *reg;
258 const struct sunxi_ccu_desc *ccu_desc;
259 int ret;
260
261 ccu_desc = of_device_get_match_data(&pdev->dev);
262 if (!ccu_desc)
263 return -EINVAL;
264
265 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
266 reg = devm_ioremap_resource(&pdev->dev, res);
267 if (IS_ERR(reg))
268 return PTR_ERR(reg);
269
270 bus_clk = devm_clk_get(&pdev->dev, "bus");
271 if (IS_ERR(bus_clk)) {
272 ret = PTR_ERR(bus_clk);
273 if (ret != -EPROBE_DEFER)
274 dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
275 return ret;
276 }
277
278 mod_clk = devm_clk_get(&pdev->dev, "mod");
279 if (IS_ERR(mod_clk)) {
280 ret = PTR_ERR(mod_clk);
281 if (ret != -EPROBE_DEFER)
282 dev_err(&pdev->dev, "Couldn't get mod clk: %d\n", ret);
283 return ret;
284 }
285
286 rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
287 if (IS_ERR(rstc)) {
288 ret = PTR_ERR(rstc);
289 if (ret != -EPROBE_DEFER)
290 dev_err(&pdev->dev,
291 "Couldn't get reset control: %d\n", ret);
292 return ret;
293 }
294
295 /* The clocks need to be enabled for us to access the registers */
296 ret = clk_prepare_enable(bus_clk);
297 if (ret) {
298 dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
299 return ret;
300 }
301
302 ret = clk_prepare_enable(mod_clk);
303 if (ret) {
304 dev_err(&pdev->dev, "Couldn't enable mod clk: %d\n", ret);
305 goto err_disable_bus_clk;
306 }
307
308 /* The reset control needs to be asserted for the controls to work */
309 ret = reset_control_deassert(rstc);
310 if (ret) {
311 dev_err(&pdev->dev,
312 "Couldn't deassert reset control: %d\n", ret);
313 goto err_disable_mod_clk;
314 }
315
316 ret = sunxi_ccu_probe(pdev->dev.of_node, reg, ccu_desc);
317 if (ret)
318 goto err_assert_reset;
319
320 return 0;
321
322 err_assert_reset:
323 reset_control_assert(rstc);
324 err_disable_mod_clk:
325 clk_disable_unprepare(mod_clk);
326 err_disable_bus_clk:
327 clk_disable_unprepare(bus_clk);
328 return ret;
329 }
330
331 static const struct of_device_id sunxi_de2_clk_ids[] = {
332 {
333 .compatible = "allwinner,sun8i-a83t-de2-clk",
334 .data = &sun8i_a83t_de2_clk_desc,
335 },
336 {
337 .compatible = "allwinner,sun8i-h3-de2-clk",
338 .data = &sun8i_h3_de2_clk_desc,
339 },
340 {
341 .compatible = "allwinner,sun8i-v3s-de2-clk",
342 .data = &sun8i_v3s_de2_clk_desc,
343 },
344 {
345 .compatible = "allwinner,sun50i-a64-de2-clk",
346 .data = &sun50i_a64_de2_clk_desc,
347 },
348 {
349 .compatible = "allwinner,sun50i-h5-de2-clk",
350 .data = &sun50i_a64_de2_clk_desc,
351 },
352 {
353 .compatible = "allwinner,sun50i-h6-de3-clk",
354 .data = &sun50i_h6_de3_clk_desc,
355 },
356 { }
357 };
358
359 static struct platform_driver sunxi_de2_clk_driver = {
360 .probe = sunxi_de2_clk_probe,
361 .driver = {
362 .name = "sunxi-de2-clks",
363 .of_match_table = sunxi_de2_clk_ids,
364 },
365 };
366 builtin_platform_driver(sunxi_de2_clk_driver);
367
