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