xref: /openbmc/linux/drivers/mfd/mt6397-core.c (revision a325f174) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2014 MediaTek Inc.
4  * Author: Flora Fu, MediaTek
5  */
6 
7 #include <linux/interrupt.h>
8 #include <linux/ioport.h>
9 #include <linux/irqdomain.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/platform_device.h>
13 #include <linux/regmap.h>
14 #include <linux/mfd/core.h>
15 #include <linux/mfd/mt6323/core.h>
16 #include <linux/mfd/mt6331/core.h>
17 #include <linux/mfd/mt6357/core.h>
18 #include <linux/mfd/mt6358/core.h>
19 #include <linux/mfd/mt6359/core.h>
20 #include <linux/mfd/mt6397/core.h>
21 #include <linux/mfd/mt6323/registers.h>
22 #include <linux/mfd/mt6331/registers.h>
23 #include <linux/mfd/mt6357/registers.h>
24 #include <linux/mfd/mt6358/registers.h>
25 #include <linux/mfd/mt6359/registers.h>
26 #include <linux/mfd/mt6397/registers.h>
27 
28 #define MT6323_RTC_BASE		0x8000
29 #define MT6323_RTC_SIZE		0x40
30 
31 #define MT6357_RTC_BASE		0x0588
32 #define MT6357_RTC_SIZE		0x3c
33 
34 #define MT6331_RTC_BASE		0x4000
35 #define MT6331_RTC_SIZE		0x40
36 
37 #define MT6358_RTC_BASE		0x0588
38 #define MT6358_RTC_SIZE		0x3c
39 
40 #define MT6397_RTC_BASE		0xe000
41 #define MT6397_RTC_SIZE		0x3e
42 
43 #define MT6323_PWRC_BASE	0x8000
44 #define MT6323_PWRC_SIZE	0x40
45 
46 static const struct resource mt6323_rtc_resources[] = {
47 	DEFINE_RES_MEM(MT6323_RTC_BASE, MT6323_RTC_SIZE),
48 	DEFINE_RES_IRQ(MT6323_IRQ_STATUS_RTC),
49 };
50 
51 static const struct resource mt6357_rtc_resources[] = {
52 	DEFINE_RES_MEM(MT6357_RTC_BASE, MT6357_RTC_SIZE),
53 	DEFINE_RES_IRQ(MT6357_IRQ_RTC),
54 };
55 
56 static const struct resource mt6331_rtc_resources[] = {
57 	DEFINE_RES_MEM(MT6331_RTC_BASE, MT6331_RTC_SIZE),
58 	DEFINE_RES_IRQ(MT6331_IRQ_STATUS_RTC),
59 };
60 
61 static const struct resource mt6358_rtc_resources[] = {
62 	DEFINE_RES_MEM(MT6358_RTC_BASE, MT6358_RTC_SIZE),
63 	DEFINE_RES_IRQ(MT6358_IRQ_RTC),
64 };
65 
66 static const struct resource mt6397_rtc_resources[] = {
67 	DEFINE_RES_MEM(MT6397_RTC_BASE, MT6397_RTC_SIZE),
68 	DEFINE_RES_IRQ(MT6397_IRQ_RTC),
69 };
70 
71 static const struct resource mt6358_keys_resources[] = {
72 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_PWRKEY, "powerkey"),
73 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_HOMEKEY, "homekey"),
74 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_PWRKEY_R, "powerkey_r"),
75 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_HOMEKEY_R, "homekey_r"),
76 };
77 
78 static const struct resource mt6359_keys_resources[] = {
79 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_PWRKEY, "powerkey"),
80 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_HOMEKEY, "homekey"),
81 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_PWRKEY_R, "powerkey_r"),
82 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_HOMEKEY_R, "homekey_r"),
83 };
84 
85 static const struct resource mt6323_keys_resources[] = {
86 	DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_PWRKEY, "powerkey"),
87 	DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_FCHRKEY, "homekey"),
88 };
89 
90 static const struct resource mt6357_keys_resources[] = {
91 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_PWRKEY, "powerkey"),
92 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_HOMEKEY, "homekey"),
93 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_PWRKEY_R, "powerkey_r"),
94 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_HOMEKEY_R, "homekey_r"),
95 };
96 
97 static const struct resource mt6331_keys_resources[] = {
98 	DEFINE_RES_IRQ_NAMED(MT6331_IRQ_STATUS_PWRKEY, "powerkey"),
99 	DEFINE_RES_IRQ_NAMED(MT6331_IRQ_STATUS_HOMEKEY, "homekey"),
100 };
101 
102 static const struct resource mt6397_keys_resources[] = {
103 	DEFINE_RES_IRQ_NAMED(MT6397_IRQ_PWRKEY, "powerkey"),
104 	DEFINE_RES_IRQ_NAMED(MT6397_IRQ_HOMEKEY, "homekey"),
105 };
106 
107 static const struct resource mt6323_pwrc_resources[] = {
108 	DEFINE_RES_MEM(MT6323_PWRC_BASE, MT6323_PWRC_SIZE),
109 };
110 
111 static const struct mfd_cell mt6323_devs[] = {
112 	{
113 		.name = "mt6323-rtc",
114 		.num_resources = ARRAY_SIZE(mt6323_rtc_resources),
115 		.resources = mt6323_rtc_resources,
116 		.of_compatible = "mediatek,mt6323-rtc",
117 	}, {
118 		.name = "mt6323-regulator",
119 		.of_compatible = "mediatek,mt6323-regulator"
120 	}, {
121 		.name = "mt6323-led",
122 		.of_compatible = "mediatek,mt6323-led"
123 	}, {
124 		.name = "mtk-pmic-keys",
125 		.num_resources = ARRAY_SIZE(mt6323_keys_resources),
126 		.resources = mt6323_keys_resources,
127 		.of_compatible = "mediatek,mt6323-keys"
128 	}, {
129 		.name = "mt6323-pwrc",
130 		.num_resources = ARRAY_SIZE(mt6323_pwrc_resources),
131 		.resources = mt6323_pwrc_resources,
132 		.of_compatible = "mediatek,mt6323-pwrc"
133 	},
134 };
135 
136 static const struct mfd_cell mt6357_devs[] = {
137 	{
138 		.name = "mt6357-regulator",
139 	}, {
140 		.name = "mt6357-rtc",
141 		.num_resources = ARRAY_SIZE(mt6357_rtc_resources),
142 		.resources = mt6357_rtc_resources,
143 		.of_compatible = "mediatek,mt6357-rtc",
144 	}, {
145 		.name = "mtk-pmic-keys",
146 		.num_resources = ARRAY_SIZE(mt6357_keys_resources),
147 		.resources = mt6357_keys_resources,
148 		.of_compatible = "mediatek,mt6357-keys"
149 	},
150 };
151 
152 /* MT6331 is always used in combination with MT6332 */
153 static const struct mfd_cell mt6331_mt6332_devs[] = {
154 	{
155 		.name = "mt6331-rtc",
156 		.num_resources = ARRAY_SIZE(mt6331_rtc_resources),
157 		.resources = mt6331_rtc_resources,
158 		.of_compatible = "mediatek,mt6331-rtc",
159 	}, {
160 		.name = "mt6331-regulator",
161 		.of_compatible = "mediatek,mt6331-regulator"
162 	}, {
163 		.name = "mt6332-regulator",
164 		.of_compatible = "mediatek,mt6332-regulator"
165 	}, {
166 		.name = "mtk-pmic-keys",
167 		.num_resources = ARRAY_SIZE(mt6331_keys_resources),
168 		.resources = mt6331_keys_resources,
169 		.of_compatible = "mediatek,mt6331-keys"
170 	},
171 };
172 
173 static const struct mfd_cell mt6358_devs[] = {
174 	{
175 		.name = "mt6358-regulator",
176 		.of_compatible = "mediatek,mt6358-regulator"
177 	}, {
178 		.name = "mt6358-rtc",
179 		.num_resources = ARRAY_SIZE(mt6358_rtc_resources),
180 		.resources = mt6358_rtc_resources,
181 		.of_compatible = "mediatek,mt6358-rtc",
182 	}, {
183 		.name = "mt6358-sound",
184 		.of_compatible = "mediatek,mt6358-sound"
185 	}, {
186 		.name = "mt6358-keys",
187 		.num_resources = ARRAY_SIZE(mt6358_keys_resources),
188 		.resources = mt6358_keys_resources,
189 		.of_compatible = "mediatek,mt6358-keys"
190 	},
191 };
192 
193 static const struct mfd_cell mt6359_devs[] = {
194 	{ .name = "mt6359-regulator", },
195 	{
196 		.name = "mt6359-rtc",
197 		.num_resources = ARRAY_SIZE(mt6358_rtc_resources),
198 		.resources = mt6358_rtc_resources,
199 		.of_compatible = "mediatek,mt6358-rtc",
200 	},
201 	{ .name = "mt6359-sound", },
202 	{
203 		.name = "mtk-pmic-keys",
204 		.num_resources = ARRAY_SIZE(mt6359_keys_resources),
205 		.resources = mt6359_keys_resources,
206 		.of_compatible = "mediatek,mt6359-keys"
207 	},
208 };
209 
210 static const struct mfd_cell mt6397_devs[] = {
211 	{
212 		.name = "mt6397-rtc",
213 		.num_resources = ARRAY_SIZE(mt6397_rtc_resources),
214 		.resources = mt6397_rtc_resources,
215 		.of_compatible = "mediatek,mt6397-rtc",
216 	}, {
217 		.name = "mt6397-regulator",
218 		.of_compatible = "mediatek,mt6397-regulator",
219 	}, {
220 		.name = "mt6397-codec",
221 		.of_compatible = "mediatek,mt6397-codec",
222 	}, {
223 		.name = "mt6397-clk",
224 		.of_compatible = "mediatek,mt6397-clk",
225 	}, {
226 		.name = "mt6397-pinctrl",
227 		.of_compatible = "mediatek,mt6397-pinctrl",
228 	}, {
229 		.name = "mtk-pmic-keys",
230 		.num_resources = ARRAY_SIZE(mt6397_keys_resources),
231 		.resources = mt6397_keys_resources,
232 		.of_compatible = "mediatek,mt6397-keys"
233 	}
234 };
235 
236 struct chip_data {
237 	u32 cid_addr;
238 	u32 cid_shift;
239 	const struct mfd_cell *cells;
240 	int cell_size;
241 	int (*irq_init)(struct mt6397_chip *chip);
242 };
243 
244 static const struct chip_data mt6323_core = {
245 	.cid_addr = MT6323_CID,
246 	.cid_shift = 0,
247 	.cells = mt6323_devs,
248 	.cell_size = ARRAY_SIZE(mt6323_devs),
249 	.irq_init = mt6397_irq_init,
250 };
251 
252 static const struct chip_data mt6357_core = {
253 	.cid_addr = MT6357_SWCID,
254 	.cid_shift = 8,
255 	.cells = mt6357_devs,
256 	.cell_size = ARRAY_SIZE(mt6357_devs),
257 	.irq_init = mt6358_irq_init,
258 };
259 
260 static const struct chip_data mt6331_mt6332_core = {
261 	.cid_addr = MT6331_HWCID,
262 	.cid_shift = 0,
263 	.cells = mt6331_mt6332_devs,
264 	.cell_size = ARRAY_SIZE(mt6331_mt6332_devs),
265 	.irq_init = mt6397_irq_init,
266 };
267 
268 static const struct chip_data mt6358_core = {
269 	.cid_addr = MT6358_SWCID,
270 	.cid_shift = 8,
271 	.cells = mt6358_devs,
272 	.cell_size = ARRAY_SIZE(mt6358_devs),
273 	.irq_init = mt6358_irq_init,
274 };
275 
276 static const struct chip_data mt6359_core = {
277 	.cid_addr = MT6359_SWCID,
278 	.cid_shift = 8,
279 	.cells = mt6359_devs,
280 	.cell_size = ARRAY_SIZE(mt6359_devs),
281 	.irq_init = mt6358_irq_init,
282 };
283 
284 static const struct chip_data mt6397_core = {
285 	.cid_addr = MT6397_CID,
286 	.cid_shift = 0,
287 	.cells = mt6397_devs,
288 	.cell_size = ARRAY_SIZE(mt6397_devs),
289 	.irq_init = mt6397_irq_init,
290 };
291 
292 static int mt6397_probe(struct platform_device *pdev)
293 {
294 	int ret;
295 	unsigned int id = 0;
296 	struct mt6397_chip *pmic;
297 	const struct chip_data *pmic_core;
298 
299 	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
300 	if (!pmic)
301 		return -ENOMEM;
302 
303 	pmic->dev = &pdev->dev;
304 
305 	/*
306 	 * mt6397 MFD is child device of soc pmic wrapper.
307 	 * Regmap is set from its parent.
308 	 */
309 	pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
310 	if (!pmic->regmap)
311 		return -ENODEV;
312 
313 	pmic_core = of_device_get_match_data(&pdev->dev);
314 	if (!pmic_core)
315 		return -ENODEV;
316 
317 	ret = regmap_read(pmic->regmap, pmic_core->cid_addr, &id);
318 	if (ret) {
319 		dev_err(&pdev->dev, "Failed to read chip id: %d\n", ret);
320 		return ret;
321 	}
322 
323 	pmic->chip_id = (id >> pmic_core->cid_shift) & 0xff;
324 
325 	platform_set_drvdata(pdev, pmic);
326 
327 	pmic->irq = platform_get_irq(pdev, 0);
328 	if (pmic->irq <= 0)
329 		return pmic->irq;
330 
331 	ret = pmic_core->irq_init(pmic);
332 	if (ret)
333 		return ret;
334 
335 	ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
336 				   pmic_core->cells, pmic_core->cell_size,
337 				   NULL, 0, pmic->irq_domain);
338 	if (ret) {
339 		irq_domain_remove(pmic->irq_domain);
340 		dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
341 	}
342 
343 	return ret;
344 }
345 
346 static const struct of_device_id mt6397_of_match[] = {
347 	{
348 		.compatible = "mediatek,mt6323",
349 		.data = &mt6323_core,
350 	}, {
351 		.compatible = "mediatek,mt6331",
352 		.data = &mt6331_mt6332_core,
353 	}, {
354 		.compatible = "mediatek,mt6357",
355 		.data = &mt6357_core,
356 	}, {
357 		.compatible = "mediatek,mt6358",
358 		.data = &mt6358_core,
359 	}, {
360 		.compatible = "mediatek,mt6359",
361 		.data = &mt6359_core,
362 	}, {
363 		.compatible = "mediatek,mt6397",
364 		.data = &mt6397_core,
365 	}, {
366 		/* sentinel */
367 	}
368 };
369 MODULE_DEVICE_TABLE(of, mt6397_of_match);
370 
371 static const struct platform_device_id mt6397_id[] = {
372 	{ "mt6397", 0 },
373 	{ },
374 };
375 MODULE_DEVICE_TABLE(platform, mt6397_id);
376 
377 static struct platform_driver mt6397_driver = {
378 	.probe = mt6397_probe,
379 	.driver = {
380 		.name = "mt6397",
381 		.of_match_table = mt6397_of_match,
382 	},
383 	.id_table = mt6397_id,
384 };
385 
386 module_platform_driver(mt6397_driver);
387 
388 MODULE_AUTHOR("Flora Fu, MediaTek");
389 MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
390 MODULE_LICENSE("GPL");
391