GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / mfd / mt6397-core.c
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/mt6358/core.h>
16 #include <linux/mfd/mt6397/core.h>
17 #include <linux/mfd/mt6323/registers.h>
18 #include <linux/mfd/mt6358/registers.h>
19 #include <linux/mfd/mt6397/registers.h>
20
21 #define MT6323_RTC_BASE         0x8000
22 #define MT6323_RTC_SIZE         0x40
23
24 #define MT6358_RTC_BASE         0x0588
25 #define MT6358_RTC_SIZE         0x3c
26
27 #define MT6397_RTC_BASE         0xe000
28 #define MT6397_RTC_SIZE         0x3e
29
30 #define MT6323_PWRC_BASE        0x8000
31 #define MT6323_PWRC_SIZE        0x40
32
33 static const struct resource mt6323_rtc_resources[] = {
34         DEFINE_RES_MEM(MT6323_RTC_BASE, MT6323_RTC_SIZE),
35         DEFINE_RES_IRQ(MT6323_IRQ_STATUS_RTC),
36 };
37
38 static const struct resource mt6358_rtc_resources[] = {
39         DEFINE_RES_MEM(MT6358_RTC_BASE, MT6358_RTC_SIZE),
40         DEFINE_RES_IRQ(MT6358_IRQ_RTC),
41 };
42
43 static const struct resource mt6397_rtc_resources[] = {
44         DEFINE_RES_MEM(MT6397_RTC_BASE, MT6397_RTC_SIZE),
45         DEFINE_RES_IRQ(MT6397_IRQ_RTC),
46 };
47
48 static const struct resource mt6323_keys_resources[] = {
49         DEFINE_RES_IRQ(MT6323_IRQ_STATUS_PWRKEY),
50         DEFINE_RES_IRQ(MT6323_IRQ_STATUS_FCHRKEY),
51 };
52
53 static const struct resource mt6397_keys_resources[] = {
54         DEFINE_RES_IRQ(MT6397_IRQ_PWRKEY),
55         DEFINE_RES_IRQ(MT6397_IRQ_HOMEKEY),
56 };
57
58 static const struct resource mt6323_pwrc_resources[] = {
59         DEFINE_RES_MEM(MT6323_PWRC_BASE, MT6323_PWRC_SIZE),
60 };
61
62 static const struct mfd_cell mt6323_devs[] = {
63         {
64                 .name = "mt6323-rtc",
65                 .num_resources = ARRAY_SIZE(mt6323_rtc_resources),
66                 .resources = mt6323_rtc_resources,
67                 .of_compatible = "mediatek,mt6323-rtc",
68         }, {
69                 .name = "mt6323-regulator",
70                 .of_compatible = "mediatek,mt6323-regulator"
71         }, {
72                 .name = "mt6323-led",
73                 .of_compatible = "mediatek,mt6323-led"
74         }, {
75                 .name = "mtk-pmic-keys",
76                 .num_resources = ARRAY_SIZE(mt6323_keys_resources),
77                 .resources = mt6323_keys_resources,
78                 .of_compatible = "mediatek,mt6323-keys"
79         }, {
80                 .name = "mt6323-pwrc",
81                 .num_resources = ARRAY_SIZE(mt6323_pwrc_resources),
82                 .resources = mt6323_pwrc_resources,
83                 .of_compatible = "mediatek,mt6323-pwrc"
84         },
85 };
86
87 static const struct mfd_cell mt6358_devs[] = {
88         {
89                 .name = "mt6358-regulator",
90                 .of_compatible = "mediatek,mt6358-regulator"
91         }, {
92                 .name = "mt6358-rtc",
93                 .num_resources = ARRAY_SIZE(mt6358_rtc_resources),
94                 .resources = mt6358_rtc_resources,
95                 .of_compatible = "mediatek,mt6358-rtc",
96         }, {
97                 .name = "mt6358-sound",
98                 .of_compatible = "mediatek,mt6358-sound"
99         },
100 };
101
102 static const struct mfd_cell mt6397_devs[] = {
103         {
104                 .name = "mt6397-rtc",
105                 .num_resources = ARRAY_SIZE(mt6397_rtc_resources),
106                 .resources = mt6397_rtc_resources,
107                 .of_compatible = "mediatek,mt6397-rtc",
108         }, {
109                 .name = "mt6397-regulator",
110                 .of_compatible = "mediatek,mt6397-regulator",
111         }, {
112                 .name = "mt6397-codec",
113                 .of_compatible = "mediatek,mt6397-codec",
114         }, {
115                 .name = "mt6397-clk",
116                 .of_compatible = "mediatek,mt6397-clk",
117         }, {
118                 .name = "mt6397-pinctrl",
119                 .of_compatible = "mediatek,mt6397-pinctrl",
120         }, {
121                 .name = "mtk-pmic-keys",
122                 .num_resources = ARRAY_SIZE(mt6397_keys_resources),
123                 .resources = mt6397_keys_resources,
124                 .of_compatible = "mediatek,mt6397-keys"
125         }
126 };
127
128 struct chip_data {
129         u32 cid_addr;
130         u32 cid_shift;
131         const struct mfd_cell *cells;
132         int cell_size;
133         int (*irq_init)(struct mt6397_chip *chip);
134 };
135
136 static const struct chip_data mt6323_core = {
137         .cid_addr = MT6323_CID,
138         .cid_shift = 0,
139         .cells = mt6323_devs,
140         .cell_size = ARRAY_SIZE(mt6323_devs),
141         .irq_init = mt6397_irq_init,
142 };
143
144 static const struct chip_data mt6358_core = {
145         .cid_addr = MT6358_SWCID,
146         .cid_shift = 8,
147         .cells = mt6358_devs,
148         .cell_size = ARRAY_SIZE(mt6358_devs),
149         .irq_init = mt6358_irq_init,
150 };
151
152 static const struct chip_data mt6397_core = {
153         .cid_addr = MT6397_CID,
154         .cid_shift = 0,
155         .cells = mt6397_devs,
156         .cell_size = ARRAY_SIZE(mt6397_devs),
157         .irq_init = mt6397_irq_init,
158 };
159
160 static int mt6397_probe(struct platform_device *pdev)
161 {
162         int ret;
163         unsigned int id = 0;
164         struct mt6397_chip *pmic;
165         const struct chip_data *pmic_core;
166
167         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
168         if (!pmic)
169                 return -ENOMEM;
170
171         pmic->dev = &pdev->dev;
172
173         /*
174          * mt6397 MFD is child device of soc pmic wrapper.
175          * Regmap is set from its parent.
176          */
177         pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
178         if (!pmic->regmap)
179                 return -ENODEV;
180
181         pmic_core = of_device_get_match_data(&pdev->dev);
182         if (!pmic_core)
183                 return -ENODEV;
184
185         ret = regmap_read(pmic->regmap, pmic_core->cid_addr, &id);
186         if (ret) {
187                 dev_err(&pdev->dev, "Failed to read chip id: %d\n", ret);
188                 return ret;
189         }
190
191         pmic->chip_id = (id >> pmic_core->cid_shift) & 0xff;
192
193         platform_set_drvdata(pdev, pmic);
194
195         pmic->irq = platform_get_irq(pdev, 0);
196         if (pmic->irq <= 0)
197                 return pmic->irq;
198
199         ret = pmic_core->irq_init(pmic);
200         if (ret)
201                 return ret;
202
203         ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
204                                    pmic_core->cells, pmic_core->cell_size,
205                                    NULL, 0, pmic->irq_domain);
206         if (ret) {
207                 irq_domain_remove(pmic->irq_domain);
208                 dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
209         }
210
211         return ret;
212 }
213
214 static const struct of_device_id mt6397_of_match[] = {
215         {
216                 .compatible = "mediatek,mt6323",
217                 .data = &mt6323_core,
218         }, {
219                 .compatible = "mediatek,mt6358",
220                 .data = &mt6358_core,
221         }, {
222                 .compatible = "mediatek,mt6397",
223                 .data = &mt6397_core,
224         }, {
225                 /* sentinel */
226         }
227 };
228 MODULE_DEVICE_TABLE(of, mt6397_of_match);
229
230 static const struct platform_device_id mt6397_id[] = {
231         { "mt6397", 0 },
232         { },
233 };
234 MODULE_DEVICE_TABLE(platform, mt6397_id);
235
236 static struct platform_driver mt6397_driver = {
237         .probe = mt6397_probe,
238         .driver = {
239                 .name = "mt6397",
240                 .of_match_table = of_match_ptr(mt6397_of_match),
241         },
242         .id_table = mt6397_id,
243 };
244
245 module_platform_driver(mt6397_driver);
246
247 MODULE_AUTHOR("Flora Fu, MediaTek");
248 MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
249 MODULE_LICENSE("GPL");