xref: /openbmc/linux/drivers/mfd/mt6397-core.c (revision 2f164822) 
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/module.h>
10 #include <linux/of_device.h>
11 #include <linux/of_irq.h>
12 #include <linux/regmap.h>
13 #include <linux/mfd/core.h>
14 #include <linux/mfd/mt6323/core.h>
15 #include <linux/mfd/mt6331/core.h>
16 #include <linux/mfd/mt6357/core.h>
17 #include <linux/mfd/mt6358/core.h>
18 #include <linux/mfd/mt6359/core.h>
19 #include <linux/mfd/mt6397/core.h>
20 #include <linux/mfd/mt6323/registers.h>
21 #include <linux/mfd/mt6331/registers.h>
22 #include <linux/mfd/mt6357/registers.h>
23 #include <linux/mfd/mt6358/registers.h>
24 #include <linux/mfd/mt6359/registers.h>
25 #include <linux/mfd/mt6397/registers.h>
26 
27 #define MT6323_RTC_BASE		0x8000
28 #define MT6323_RTC_SIZE		0x40
29 
30 #define MT6357_RTC_BASE		0x0588
31 #define MT6357_RTC_SIZE		0x3c
32 
33 #define MT6331_RTC_BASE		0x4000
34 #define MT6331_RTC_SIZE		0x40
35 
36 #define MT6358_RTC_BASE		0x0588
37 #define MT6358_RTC_SIZE		0x3c
38 
39 #define MT6397_RTC_BASE		0xe000
40 #define MT6397_RTC_SIZE		0x3e
41 
42 #define MT6323_PWRC_BASE	0x8000
43 #define MT6323_PWRC_SIZE	0x40
44 
45 static const struct resource mt6323_rtc_resources[] = {
46 	DEFINE_RES_MEM(MT6323_RTC_BASE, MT6323_RTC_SIZE),
47 	DEFINE_RES_IRQ(MT6323_IRQ_STATUS_RTC),
48 };
49 
50 static const struct resource mt6357_rtc_resources[] = {
51 	DEFINE_RES_MEM(MT6357_RTC_BASE, MT6357_RTC_SIZE),
52 	DEFINE_RES_IRQ(MT6357_IRQ_RTC),
53 };
54 
55 static const struct resource mt6331_rtc_resources[] = {
56 	DEFINE_RES_MEM(MT6331_RTC_BASE, MT6331_RTC_SIZE),
57 	DEFINE_RES_IRQ(MT6331_IRQ_STATUS_RTC),
58 };
59 
60 static const struct resource mt6358_rtc_resources[] = {
61 	DEFINE_RES_MEM(MT6358_RTC_BASE, MT6358_RTC_SIZE),
62 	DEFINE_RES_IRQ(MT6358_IRQ_RTC),
63 };
64 
65 static const struct resource mt6397_rtc_resources[] = {
66 	DEFINE_RES_MEM(MT6397_RTC_BASE, MT6397_RTC_SIZE),
67 	DEFINE_RES_IRQ(MT6397_IRQ_RTC),
68 };
69 
70 static const struct resource mt6358_keys_resources[] = {
71 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_PWRKEY, "powerkey"),
72 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_HOMEKEY, "homekey"),
73 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_PWRKEY_R, "powerkey_r"),
74 	DEFINE_RES_IRQ_NAMED(MT6358_IRQ_HOMEKEY_R, "homekey_r"),
75 };
76 
77 static const struct resource mt6359_keys_resources[] = {
78 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_PWRKEY, "powerkey"),
79 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_HOMEKEY, "homekey"),
80 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_PWRKEY_R, "powerkey_r"),
81 	DEFINE_RES_IRQ_NAMED(MT6359_IRQ_HOMEKEY_R, "homekey_r"),
82 };
83 
84 static const struct resource mt6323_keys_resources[] = {
85 	DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_PWRKEY, "powerkey"),
86 	DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_FCHRKEY, "homekey"),
87 };
88 
89 static const struct resource mt6357_keys_resources[] = {
90 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_PWRKEY, "powerkey"),
91 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_HOMEKEY, "homekey"),
92 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_PWRKEY_R, "powerkey_r"),
93 	DEFINE_RES_IRQ_NAMED(MT6357_IRQ_HOMEKEY_R, "homekey_r"),
94 };
95 
96 static const struct resource mt6331_keys_resources[] = {
97 	DEFINE_RES_IRQ_NAMED(MT6331_IRQ_STATUS_PWRKEY, "powerkey"),
98 	DEFINE_RES_IRQ_NAMED(MT6331_IRQ_STATUS_HOMEKEY, "homekey"),
99 };
100 
101 static const struct resource mt6397_keys_resources[] = {
102 	DEFINE_RES_IRQ_NAMED(MT6397_IRQ_PWRKEY, "powerkey"),
103 	DEFINE_RES_IRQ_NAMED(MT6397_IRQ_HOMEKEY, "homekey"),
104 };
105 
106 static const struct resource mt6323_pwrc_resources[] = {
107 	DEFINE_RES_MEM(MT6323_PWRC_BASE, MT6323_PWRC_SIZE),
108 };
109 
110 static const struct mfd_cell mt6323_devs[] = {
111 	{
112 		.name = "mt6323-rtc",
113 		.num_resources = ARRAY_SIZE(mt6323_rtc_resources),
114 		.resources = mt6323_rtc_resources,
115 		.of_compatible = "mediatek,mt6323-rtc",
116 	}, {
117 		.name = "mt6323-regulator",
118 		.of_compatible = "mediatek,mt6323-regulator"
119 	}, {
120 		.name = "mt6323-led",
121 		.of_compatible = "mediatek,mt6323-led"
122 	}, {
123 		.name = "mtk-pmic-keys",
124 		.num_resources = ARRAY_SIZE(mt6323_keys_resources),
125 		.resources = mt6323_keys_resources,
126 		.of_compatible = "mediatek,mt6323-keys"
127 	}, {
128 		.name = "mt6323-pwrc",
129 		.num_resources = ARRAY_SIZE(mt6323_pwrc_resources),
130 		.resources = mt6323_pwrc_resources,
131 		.of_compatible = "mediatek,mt6323-pwrc"
132 	},
133 };
134 
135 static const struct mfd_cell mt6357_devs[] = {
136 	{
137 		.name = "mt6357-regulator",
138 	}, {
139 		.name = "mt6357-rtc",
140 		.num_resources = ARRAY_SIZE(mt6357_rtc_resources),
141 		.resources = mt6357_rtc_resources,
142 		.of_compatible = "mediatek,mt6357-rtc",
143 	}, {
144 		.name = "mtk-pmic-keys",
145 		.num_resources = ARRAY_SIZE(mt6357_keys_resources),
146 		.resources = mt6357_keys_resources,
147 		.of_compatible = "mediatek,mt6357-keys"
148 	},
149 };
150 
151 /* MT6331 is always used in combination with MT6332 */
152 static const struct mfd_cell mt6331_mt6332_devs[] = {
153 	{
154 		.name = "mt6331-rtc",
155 		.num_resources = ARRAY_SIZE(mt6331_rtc_resources),
156 		.resources = mt6331_rtc_resources,
157 		.of_compatible = "mediatek,mt6331-rtc",
158 	}, {
159 		.name = "mt6331-regulator",
160 		.of_compatible = "mediatek,mt6331-regulator"
161 	}, {
162 		.name = "mt6332-regulator",
163 		.of_compatible = "mediatek,mt6332-regulator"
164 	}, {
165 		.name = "mtk-pmic-keys",
166 		.num_resources = ARRAY_SIZE(mt6331_keys_resources),
167 		.resources = mt6331_keys_resources,
168 		.of_compatible = "mediatek,mt6331-keys"
169 	},
170 };
171 
172 static const struct mfd_cell mt6358_devs[] = {
173 	{
174 		.name = "mt6358-regulator",
175 		.of_compatible = "mediatek,mt6358-regulator"
176 	}, {
177 		.name = "mt6358-rtc",
178 		.num_resources = ARRAY_SIZE(mt6358_rtc_resources),
179 		.resources = mt6358_rtc_resources,
180 		.of_compatible = "mediatek,mt6358-rtc",
181 	}, {
182 		.name = "mt6358-sound",
183 		.of_compatible = "mediatek,mt6358-sound"
184 	}, {
185 		.name = "mt6358-keys",
186 		.num_resources = ARRAY_SIZE(mt6358_keys_resources),
187 		.resources = mt6358_keys_resources,
188 		.of_compatible = "mediatek,mt6358-keys"
189 	},
190 };
191 
192 static const struct mfd_cell mt6359_devs[] = {
193 	{ .name = "mt6359-regulator", },
194 	{
195 		.name = "mt6359-rtc",
196 		.num_resources = ARRAY_SIZE(mt6358_rtc_resources),
197 		.resources = mt6358_rtc_resources,
198 		.of_compatible = "mediatek,mt6358-rtc",
199 	},
200 	{ .name = "mt6359-sound", },
201 	{
202 		.name = "mtk-pmic-keys",
203 		.num_resources = ARRAY_SIZE(mt6359_keys_resources),
204 		.resources = mt6359_keys_resources,
205 		.of_compatible = "mediatek,mt6359-keys"
206 	},
207 };
208 
209 static const struct mfd_cell mt6397_devs[] = {
210 	{
211 		.name = "mt6397-rtc",
212 		.num_resources = ARRAY_SIZE(mt6397_rtc_resources),
213 		.resources = mt6397_rtc_resources,
214 		.of_compatible = "mediatek,mt6397-rtc",
215 	}, {
216 		.name = "mt6397-regulator",
217 		.of_compatible = "mediatek,mt6397-regulator",
218 	}, {
219 		.name = "mt6397-codec",
220 		.of_compatible = "mediatek,mt6397-codec",
221 	}, {
222 		.name = "mt6397-clk",
223 		.of_compatible = "mediatek,mt6397-clk",
224 	}, {
225 		.name = "mt6397-pinctrl",
226 		.of_compatible = "mediatek,mt6397-pinctrl",
227 	}, {
228 		.name = "mtk-pmic-keys",
229 		.num_resources = ARRAY_SIZE(mt6397_keys_resources),
230 		.resources = mt6397_keys_resources,
231 		.of_compatible = "mediatek,mt6397-keys"
232 	}
233 };
234 
235 struct chip_data {
236 	u32 cid_addr;
237 	u32 cid_shift;
238 	const struct mfd_cell *cells;
239 	int cell_size;
240 	int (*irq_init)(struct mt6397_chip *chip);
241 };
242 
243 static const struct chip_data mt6323_core = {
244 	.cid_addr = MT6323_CID,
245 	.cid_shift = 0,
246 	.cells = mt6323_devs,
247 	.cell_size = ARRAY_SIZE(mt6323_devs),
248 	.irq_init = mt6397_irq_init,
249 };
250 
251 static const struct chip_data mt6357_core = {
252 	.cid_addr = MT6357_SWCID,
253 	.cid_shift = 8,
254 	.cells = mt6357_devs,
255 	.cell_size = ARRAY_SIZE(mt6357_devs),
256 	.irq_init = mt6358_irq_init,
257 };
258 
259 static const struct chip_data mt6331_mt6332_core = {
260 	.cid_addr = MT6331_HWCID,
261 	.cid_shift = 0,
262 	.cells = mt6331_mt6332_devs,
263 	.cell_size = ARRAY_SIZE(mt6331_mt6332_devs),
264 	.irq_init = mt6397_irq_init,
265 };
266 
267 static const struct chip_data mt6358_core = {
268 	.cid_addr = MT6358_SWCID,
269 	.cid_shift = 8,
270 	.cells = mt6358_devs,
271 	.cell_size = ARRAY_SIZE(mt6358_devs),
272 	.irq_init = mt6358_irq_init,
273 };
274 
275 static const struct chip_data mt6359_core = {
276 	.cid_addr = MT6359_SWCID,
277 	.cid_shift = 8,
278 	.cells = mt6359_devs,
279 	.cell_size = ARRAY_SIZE(mt6359_devs),
280 	.irq_init = mt6358_irq_init,
281 };
282 
283 static const struct chip_data mt6397_core = {
284 	.cid_addr = MT6397_CID,
285 	.cid_shift = 0,
286 	.cells = mt6397_devs,
287 	.cell_size = ARRAY_SIZE(mt6397_devs),
288 	.irq_init = mt6397_irq_init,
289 };
290 
291 static int mt6397_probe(struct platform_device *pdev)
292 {
293 	int ret;
294 	unsigned int id = 0;
295 	struct mt6397_chip *pmic;
296 	const struct chip_data *pmic_core;
297 
298 	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
299 	if (!pmic)
300 		return -ENOMEM;
301 
302 	pmic->dev = &pdev->dev;
303 
304 	/*
305 	 * mt6397 MFD is child device of soc pmic wrapper.
306 	 * Regmap is set from its parent.
307 	 */
308 	pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
309 	if (!pmic->regmap)
310 		return -ENODEV;
311 
312 	pmic_core = of_device_get_match_data(&pdev->dev);
313 	if (!pmic_core)
314 		return -ENODEV;
315 
316 	ret = regmap_read(pmic->regmap, pmic_core->cid_addr, &id);
317 	if (ret) {
318 		dev_err(&pdev->dev, "Failed to read chip id: %d\n", ret);
319 		return ret;
320 	}
321 
322 	pmic->chip_id = (id >> pmic_core->cid_shift) & 0xff;
323 
324 	platform_set_drvdata(pdev, pmic);
325 
326 	pmic->irq = platform_get_irq(pdev, 0);
327 	if (pmic->irq <= 0)
328 		return pmic->irq;
329 
330 	ret = pmic_core->irq_init(pmic);
331 	if (ret)
332 		return ret;
333 
334 	ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
335 				   pmic_core->cells, pmic_core->cell_size,
336 				   NULL, 0, pmic->irq_domain);
337 	if (ret) {
338 		irq_domain_remove(pmic->irq_domain);
339 		dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
340 	}
341 
342 	return ret;
343 }
344 
345 static const struct of_device_id mt6397_of_match[] = {
346 	{
347 		.compatible = "mediatek,mt6323",
348 		.data = &mt6323_core,
349 	}, {
350 		.compatible = "mediatek,mt6331",
351 		.data = &mt6331_mt6332_core,
352 	}, {
353 		.compatible = "mediatek,mt6357",
354 		.data = &mt6357_core,
355 	}, {
356 		.compatible = "mediatek,mt6358",
357 		.data = &mt6358_core,
358 	}, {
359 		.compatible = "mediatek,mt6359",
360 		.data = &mt6359_core,
361 	}, {
362 		.compatible = "mediatek,mt6397",
363 		.data = &mt6397_core,
364 	}, {
365 		/* sentinel */
366 	}
367 };
368 MODULE_DEVICE_TABLE(of, mt6397_of_match);
369 
370 static const struct platform_device_id mt6397_id[] = {
371 	{ "mt6397", 0 },
372 	{ },
373 };
374 MODULE_DEVICE_TABLE(platform, mt6397_id);
375 
376 static struct platform_driver mt6397_driver = {
377 	.probe = mt6397_probe,
378 	.driver = {
379 		.name = "mt6397",
380 		.of_match_table = mt6397_of_match,
381 	},
382 	.id_table = mt6397_id,
383 };
384 
385 module_platform_driver(mt6397_driver);
386 
387 MODULE_AUTHOR("Flora Fu, MediaTek");
388 MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
389 MODULE_LICENSE("GPL");
390