Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
8bdf87b4 | 2 | /* |
ec58871f | 3 | * Device driver for Hi6421 PMIC |
8bdf87b4 GX |
4 | * |
5 | * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd. | |
6 | * http://www.hisilicon.com | |
ec58871f | 7 | * Copyright (c) <2013-2017> Linaro Ltd. |
8bdf87b4 GX |
8 | * http://www.linaro.org |
9 | * | |
10 | * Author: Guodong Xu <guodong.xu@linaro.org> | |
8bdf87b4 GX |
11 | */ |
12 | ||
13 | #include <linux/device.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/mfd/core.h> | |
ec58871f | 16 | #include <linux/mfd/hi6421-pmic.h> |
8bdf87b4 | 17 | #include <linux/module.h> |
ec58871f | 18 | #include <linux/of_device.h> |
8bdf87b4 GX |
19 | #include <linux/platform_device.h> |
20 | #include <linux/regmap.h> | |
8bdf87b4 GX |
21 | |
22 | static const struct mfd_cell hi6421_devs[] = { | |
23 | { .name = "hi6421-regulator", }, | |
24 | }; | |
25 | ||
ec58871f GX |
26 | static const struct mfd_cell hi6421v530_devs[] = { |
27 | { .name = "hi6421v530-regulator", }, | |
28 | }; | |
29 | ||
7f9e3feb | 30 | static const struct regmap_config hi6421_regmap_config = { |
8bdf87b4 GX |
31 | .reg_bits = 32, |
32 | .reg_stride = 4, | |
33 | .val_bits = 8, | |
34 | .max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX), | |
35 | }; | |
36 | ||
ec58871f GX |
37 | static const struct of_device_id of_hi6421_pmic_match[] = { |
38 | { | |
39 | .compatible = "hisilicon,hi6421-pmic", | |
40 | .data = (void *)HI6421 | |
41 | }, | |
42 | { | |
43 | .compatible = "hisilicon,hi6421v530-pmic", | |
44 | .data = (void *)HI6421_V530 | |
45 | }, | |
46 | { }, | |
47 | }; | |
48 | MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match); | |
49 | ||
8bdf87b4 GX |
50 | static int hi6421_pmic_probe(struct platform_device *pdev) |
51 | { | |
52 | struct hi6421_pmic *pmic; | |
53 | struct resource *res; | |
ec58871f GX |
54 | const struct of_device_id *id; |
55 | const struct mfd_cell *subdevs; | |
56 | enum hi6421_type type; | |
8bdf87b4 | 57 | void __iomem *base; |
ec58871f GX |
58 | int n_subdevs, ret; |
59 | ||
60 | id = of_match_device(of_hi6421_pmic_match, &pdev->dev); | |
61 | if (!id) | |
62 | return -EINVAL; | |
63 | type = (enum hi6421_type)id->data; | |
8bdf87b4 GX |
64 | |
65 | pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); | |
66 | if (!pmic) | |
67 | return -ENOMEM; | |
68 | ||
69 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
70 | base = devm_ioremap_resource(&pdev->dev, res); | |
71 | if (IS_ERR(base)) | |
72 | return PTR_ERR(base); | |
73 | ||
74 | pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base, | |
75 | &hi6421_regmap_config); | |
76 | if (IS_ERR(pmic->regmap)) { | |
568e5476 GX |
77 | dev_err(&pdev->dev, "Failed to initialise Regmap: %ld\n", |
78 | PTR_ERR(pmic->regmap)); | |
8bdf87b4 GX |
79 | return PTR_ERR(pmic->regmap); |
80 | } | |
81 | ||
ec58871f GX |
82 | platform_set_drvdata(pdev, pmic); |
83 | ||
84 | switch (type) { | |
85 | case HI6421: | |
86 | /* set over-current protection debounce 8ms */ | |
87 | regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG, | |
8bdf87b4 GX |
88 | (HI6421_OCP_DEB_SEL_MASK |
89 | | HI6421_OCP_EN_DEBOUNCE_MASK | |
90 | | HI6421_OCP_AUTO_STOP_MASK), | |
91 | (HI6421_OCP_DEB_SEL_8MS | |
92 | | HI6421_OCP_EN_DEBOUNCE_ENABLE)); | |
93 | ||
ec58871f GX |
94 | subdevs = hi6421_devs; |
95 | n_subdevs = ARRAY_SIZE(hi6421_devs); | |
96 | break; | |
97 | case HI6421_V530: | |
98 | subdevs = hi6421v530_devs; | |
99 | n_subdevs = ARRAY_SIZE(hi6421v530_devs); | |
100 | break; | |
101 | default: | |
102 | dev_err(&pdev->dev, "Unknown device type %d\n", | |
103 | (unsigned int)type); | |
104 | return -EINVAL; | |
105 | } | |
8bdf87b4 | 106 | |
ec58871f GX |
107 | ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, |
108 | subdevs, n_subdevs, NULL, 0, NULL); | |
8bdf87b4 | 109 | if (ret) { |
568e5476 | 110 | dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret); |
8bdf87b4 GX |
111 | return ret; |
112 | } | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
8bdf87b4 GX |
117 | static struct platform_driver hi6421_pmic_driver = { |
118 | .driver = { | |
ec58871f GX |
119 | .name = "hi6421_pmic", |
120 | .of_match_table = of_hi6421_pmic_match, | |
8bdf87b4 GX |
121 | }, |
122 | .probe = hi6421_pmic_probe, | |
8bdf87b4 GX |
123 | }; |
124 | module_platform_driver(hi6421_pmic_driver); | |
125 | ||
126 | MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>"); | |
127 | MODULE_DESCRIPTION("Hi6421 PMIC driver"); | |
128 | MODULE_LICENSE("GPL v2"); |