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gerrit-public.fairphone.software / kernel / msm-4.9 / e655bc35fdfdaae540136b524b574d2fb3ea9998 / . / drivers / mfd / hi655x-pmic.c
blob: 05ddc78823622bf03522bf60b7a545f779b33273 [file] [log] [blame]
Chen Fengb52207e2016-02-14 14:29:21 +0800[diff] [blame]1/*
2 * Device driver for MFD hi655x PMIC
3 *
4 * Copyright (c) 2016 Hisilicon.
5 *
6 * Authors:
7 * Chen Feng <puck.chen@hisilicon.com>
8 * Fei Wang <w.f@huawei.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/gpio.h>
16#include <linux/io.h>
17#include <linux/interrupt.h>
18#include <linux/init.h>
19#include <linux/mfd/core.h>
20#include <linux/mfd/hi655x-pmic.h>
21#include <linux/module.h>
22#include <linux/of_gpio.h>
23#include <linux/of_platform.h>
24#include <linux/platform_device.h>
25#include <linux/regmap.h>
26
27static const struct mfd_cell hi655x_pmic_devs[] = {
28 { .name = "hi655x-regulator", },
29};
30
31static const struct regmap_irq hi655x_irqs[] = {
32 { .reg_offset = 0, .mask = OTMP_D1R_INT },
33 { .reg_offset = 0, .mask = VSYS_2P5_R_INT },
34 { .reg_offset = 0, .mask = VSYS_UV_D3R_INT },
35 { .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT },
36 { .reg_offset = 0, .mask = PWRON_D4SR_INT },
37 { .reg_offset = 0, .mask = PWRON_D20F_INT },
38 { .reg_offset = 0, .mask = PWRON_D20R_INT },
39 { .reg_offset = 0, .mask = RESERVE_INT },
40};
41
42static const struct regmap_irq_chip hi655x_irq_chip = {
43 .name = "hi655x-pmic",
44 .irqs = hi655x_irqs,
45 .num_regs = 1,
46 .num_irqs = ARRAY_SIZE(hi655x_irqs),
47 .status_base = HI655X_IRQ_STAT_BASE,
48 .mask_base = HI655X_IRQ_MASK_BASE,
49};
50
51static struct regmap_config hi655x_regmap_config = {
52 .reg_bits = 32,
53 .reg_stride = HI655X_STRIDE,
54 .val_bits = 8,
55 .max_register = HI655X_BUS_ADDR(0xFFF),
56};
57
58static void hi655x_local_irq_clear(struct regmap *map)
59{
60 int i;
61
62 regmap_write(map, HI655X_ANA_IRQM_BASE, HI655X_IRQ_CLR);
63 for (i = 0; i < HI655X_IRQ_ARRAY; i++) {
64 regmap_write(map, HI655X_IRQ_STAT_BASE + i * HI655X_STRIDE,
65 HI655X_IRQ_CLR);
66 }
67}
68
69static int hi655x_pmic_probe(struct platform_device *pdev)
70{
71 int ret;
72 struct hi655x_pmic *pmic;
73 struct device *dev = &pdev->dev;
74 struct device_node *np = dev->of_node;
75 void __iomem *base;
76
77 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
78 if (!pmic)
79 return -ENOMEM;
80 pmic->dev = dev;
81
82 pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
83 if (!pmic->res)
84 return -ENOENT;
85
86 base = devm_ioremap_resource(dev, pmic->res);
87 if (!base)
88 return -ENOMEM;
89
90 pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base,
91 &hi655x_regmap_config);
92
93 regmap_read(pmic->regmap, HI655X_BUS_ADDR(HI655X_VER_REG), &pmic->ver);
94 if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) {
95 dev_warn(dev, "PMU version %d unsupported\n", pmic->ver);
96 return -EINVAL;
97 }
98
99 hi655x_local_irq_clear(pmic->regmap);
100
101 pmic->gpio = of_get_named_gpio(np, "pmic-gpios", 0);
102 if (!gpio_is_valid(pmic->gpio)) {
103 dev_err(dev, "Failed to get the pmic-gpios\n");
104 return -ENODEV;
105 }
106
107 ret = devm_gpio_request_one(dev, pmic->gpio, GPIOF_IN,
108 "hi655x_pmic_irq");
109 if (ret < 0) {
110 dev_err(dev, "Failed to request gpio %d ret = %d\n",
111 pmic->gpio, ret);
112 return ret;
113 }
114
115 ret = regmap_add_irq_chip(pmic->regmap, gpio_to_irq(pmic->gpio),
116 IRQF_TRIGGER_LOW | IRQF_NO_SUSPEND, 0,
117 &hi655x_irq_chip, &pmic->irq_data);
118 if (ret) {
119 dev_err(dev, "Failed to obtain 'hi655x_pmic_irq' %d\n", ret);
120 return ret;
121 }
122
123 platform_set_drvdata(pdev, pmic);
124
125 ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, hi655x_pmic_devs,
126 ARRAY_SIZE(hi655x_pmic_devs), NULL, 0, NULL);
127 if (ret) {
128 dev_err(dev, "Failed to register device %d\n", ret);
129 regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data);
130 return ret;
131 }
132
133 return 0;
134}
135
136static int hi655x_pmic_remove(struct platform_device *pdev)
137{
138 struct hi655x_pmic *pmic = platform_get_drvdata(pdev);
139
140 regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data);
141 mfd_remove_devices(&pdev->dev);
142 return 0;
143}
144
145static const struct of_device_id hi655x_pmic_match[] = {
146 { .compatible = "hisilicon,hi655x-pmic", },
147 {},
148};
149
150static struct platform_driver hi655x_pmic_driver = {
151 .driver = {
152 .name = "hi655x-pmic",
153 .of_match_table = of_match_ptr(hi655x_pmic_match),
154 },
155 .probe = hi655x_pmic_probe,
156 .remove = hi655x_pmic_remove,
157};
158module_platform_driver(hi655x_pmic_driver);
159
160MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
161MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver");
162MODULE_LICENSE("GPL v2");