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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b52207ef CF |
2 | /* |
3 | * Device driver for MFD hi655x PMIC | |
4 | * | |
5 | * Copyright (c) 2016 Hisilicon. | |
6 | * | |
7 | * Authors: | |
8 | * Chen Feng <puck.chen@hisilicon.com> | |
9 | * Fei Wang <w.f@huawei.com> | |
b52207ef CF |
10 | */ |
11 | ||
12 | #include <linux/gpio.h> | |
13 | #include <linux/io.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/mfd/core.h> | |
17 | #include <linux/mfd/hi655x-pmic.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of_gpio.h> | |
20 | #include <linux/of_platform.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/regmap.h> | |
23 | ||
b52207ef | 24 | static const struct regmap_irq hi655x_irqs[] = { |
9e3d5c99 JS |
25 | { .reg_offset = 0, .mask = OTMP_D1R_INT_MASK }, |
26 | { .reg_offset = 0, .mask = VSYS_2P5_R_INT_MASK }, | |
27 | { .reg_offset = 0, .mask = VSYS_UV_D3R_INT_MASK }, | |
28 | { .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT_MASK }, | |
29 | { .reg_offset = 0, .mask = PWRON_D4SR_INT_MASK }, | |
30 | { .reg_offset = 0, .mask = PWRON_D20F_INT_MASK }, | |
31 | { .reg_offset = 0, .mask = PWRON_D20R_INT_MASK }, | |
32 | { .reg_offset = 0, .mask = RESERVE_INT_MASK }, | |
b52207ef CF |
33 | }; |
34 | ||
35 | static const struct regmap_irq_chip hi655x_irq_chip = { | |
36 | .name = "hi655x-pmic", | |
37 | .irqs = hi655x_irqs, | |
38 | .num_regs = 1, | |
39 | .num_irqs = ARRAY_SIZE(hi655x_irqs), | |
40 | .status_base = HI655X_IRQ_STAT_BASE, | |
417e06bb | 41 | .ack_base = HI655X_IRQ_STAT_BASE, |
b52207ef CF |
42 | .mask_base = HI655X_IRQ_MASK_BASE, |
43 | }; | |
44 | ||
45 | static struct regmap_config hi655x_regmap_config = { | |
46 | .reg_bits = 32, | |
47 | .reg_stride = HI655X_STRIDE, | |
48 | .val_bits = 8, | |
6afebb70 | 49 | .max_register = HI655X_BUS_ADDR(0x400) - HI655X_STRIDE, |
b52207ef CF |
50 | }; |
51 | ||
eb10245f JS |
52 | static struct resource pwrkey_resources[] = { |
53 | { | |
54 | .name = "down", | |
55 | .start = PWRON_D20R_INT, | |
56 | .end = PWRON_D20R_INT, | |
57 | .flags = IORESOURCE_IRQ, | |
58 | }, { | |
59 | .name = "up", | |
60 | .start = PWRON_D20F_INT, | |
61 | .end = PWRON_D20F_INT, | |
62 | .flags = IORESOURCE_IRQ, | |
63 | }, { | |
64 | .name = "hold 4s", | |
65 | .start = PWRON_D4SR_INT, | |
66 | .end = PWRON_D4SR_INT, | |
67 | .flags = IORESOURCE_IRQ, | |
68 | }, | |
69 | }; | |
70 | ||
71 | static const struct mfd_cell hi655x_pmic_devs[] = { | |
72 | { | |
73 | .name = "hi65xx-powerkey", | |
74 | .num_resources = ARRAY_SIZE(pwrkey_resources), | |
75 | .resources = &pwrkey_resources[0], | |
76 | }, | |
ac03fec1 DL |
77 | { .name = "hi655x-regulator", }, |
78 | { .name = "hi655x-clk", }, | |
eb10245f JS |
79 | }; |
80 | ||
b52207ef CF |
81 | static void hi655x_local_irq_clear(struct regmap *map) |
82 | { | |
83 | int i; | |
84 | ||
85 | regmap_write(map, HI655X_ANA_IRQM_BASE, HI655X_IRQ_CLR); | |
86 | for (i = 0; i < HI655X_IRQ_ARRAY; i++) { | |
87 | regmap_write(map, HI655X_IRQ_STAT_BASE + i * HI655X_STRIDE, | |
88 | HI655X_IRQ_CLR); | |
89 | } | |
90 | } | |
91 | ||
92 | static int hi655x_pmic_probe(struct platform_device *pdev) | |
93 | { | |
94 | int ret; | |
95 | struct hi655x_pmic *pmic; | |
96 | struct device *dev = &pdev->dev; | |
97 | struct device_node *np = dev->of_node; | |
98 | void __iomem *base; | |
99 | ||
100 | pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); | |
101 | if (!pmic) | |
102 | return -ENOMEM; | |
103 | pmic->dev = dev; | |
104 | ||
105 | pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
b52207ef | 106 | base = devm_ioremap_resource(dev, pmic->res); |
7e28abda WY |
107 | if (IS_ERR(base)) |
108 | return PTR_ERR(base); | |
b52207ef CF |
109 | |
110 | pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base, | |
111 | &hi655x_regmap_config); | |
7efd105c AL |
112 | if (IS_ERR(pmic->regmap)) |
113 | return PTR_ERR(pmic->regmap); | |
b52207ef CF |
114 | |
115 | regmap_read(pmic->regmap, HI655X_BUS_ADDR(HI655X_VER_REG), &pmic->ver); | |
116 | if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) { | |
117 | dev_warn(dev, "PMU version %d unsupported\n", pmic->ver); | |
118 | return -EINVAL; | |
119 | } | |
120 | ||
121 | hi655x_local_irq_clear(pmic->regmap); | |
122 | ||
123 | pmic->gpio = of_get_named_gpio(np, "pmic-gpios", 0); | |
124 | if (!gpio_is_valid(pmic->gpio)) { | |
125 | dev_err(dev, "Failed to get the pmic-gpios\n"); | |
126 | return -ENODEV; | |
127 | } | |
128 | ||
129 | ret = devm_gpio_request_one(dev, pmic->gpio, GPIOF_IN, | |
130 | "hi655x_pmic_irq"); | |
131 | if (ret < 0) { | |
132 | dev_err(dev, "Failed to request gpio %d ret = %d\n", | |
133 | pmic->gpio, ret); | |
134 | return ret; | |
135 | } | |
136 | ||
137 | ret = regmap_add_irq_chip(pmic->regmap, gpio_to_irq(pmic->gpio), | |
138 | IRQF_TRIGGER_LOW | IRQF_NO_SUSPEND, 0, | |
139 | &hi655x_irq_chip, &pmic->irq_data); | |
140 | if (ret) { | |
141 | dev_err(dev, "Failed to obtain 'hi655x_pmic_irq' %d\n", ret); | |
142 | return ret; | |
143 | } | |
144 | ||
145 | platform_set_drvdata(pdev, pmic); | |
146 | ||
147 | ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, hi655x_pmic_devs, | |
eb10245f JS |
148 | ARRAY_SIZE(hi655x_pmic_devs), NULL, 0, |
149 | regmap_irq_get_domain(pmic->irq_data)); | |
b52207ef CF |
150 | if (ret) { |
151 | dev_err(dev, "Failed to register device %d\n", ret); | |
152 | regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data); | |
153 | return ret; | |
154 | } | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static int hi655x_pmic_remove(struct platform_device *pdev) | |
160 | { | |
161 | struct hi655x_pmic *pmic = platform_get_drvdata(pdev); | |
162 | ||
163 | regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data); | |
164 | mfd_remove_devices(&pdev->dev); | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static const struct of_device_id hi655x_pmic_match[] = { | |
169 | { .compatible = "hisilicon,hi655x-pmic", }, | |
170 | {}, | |
171 | }; | |
e45b6c80 | 172 | MODULE_DEVICE_TABLE(of, hi655x_pmic_match); |
b52207ef CF |
173 | |
174 | static struct platform_driver hi655x_pmic_driver = { | |
175 | .driver = { | |
176 | .name = "hi655x-pmic", | |
177 | .of_match_table = of_match_ptr(hi655x_pmic_match), | |
178 | }, | |
179 | .probe = hi655x_pmic_probe, | |
180 | .remove = hi655x_pmic_remove, | |
181 | }; | |
182 | module_platform_driver(hi655x_pmic_driver); | |
183 | ||
184 | MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>"); | |
185 | MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver"); | |
186 | MODULE_LICENSE("GPL v2"); |