1// SPDX-License-Identifier: GPL-2.0
2// Copyright (C) STMicroelectronics 2018
3// Author: Pascal Paillet <p.paillet@st.com>
4
5#include <linux/i2c.h>
6#include <linux/interrupt.h>
7#include <linux/mfd/core.h>
8#include <linux/mfd/stpmic1.h>
9#include <linux/module.h>
10#include <linux/of.h>
11#include <linux/of_irq.h>
12#include <linux/of_platform.h>
13#include <linux/pm_wakeirq.h>
14#include <linux/regmap.h>
15
16#include <dt-bindings/mfd/st,stpmic1.h>
17
18#define STPMIC1_MAIN_IRQ 0
19
20static const struct regmap_range stpmic1_readable_ranges[] = {
21 regmap_reg_range(TURN_ON_SR, VERSION_SR),
22 regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR),
23 regmap_reg_range(BST_SW_CR, BST_SW_CR),
24 regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
25 regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
26 regmap_reg_range(INT_MASK_R1, INT_MASK_R4),
27 regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
28 regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
29 regmap_reg_range(INT_SRC_R1, INT_SRC_R1),
30};
31
32static const struct regmap_range stpmic1_writeable_ranges[] = {
33 regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR),
34 regmap_reg_range(BST_SW_CR, BST_SW_CR),
35 regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
36 regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
37 regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
38};
39
40static const struct regmap_range stpmic1_volatile_ranges[] = {
41 regmap_reg_range(TURN_ON_SR, VERSION_SR),
42 regmap_reg_range(WCHDG_CR, WCHDG_CR),
43 regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
44 regmap_reg_range(INT_SRC_R1, INT_SRC_R4),
45};
46
47static const struct regmap_access_table stpmic1_readable_table = {
48 .yes_ranges = stpmic1_readable_ranges,
49 .n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges),
50};
51
52static const struct regmap_access_table stpmic1_writeable_table = {
53 .yes_ranges = stpmic1_writeable_ranges,
54 .n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges),
55};
56
57static const struct regmap_access_table stpmic1_volatile_table = {
58 .yes_ranges = stpmic1_volatile_ranges,
59 .n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges),
60};
61
62const struct regmap_config stpmic1_regmap_config = {
63 .reg_bits = 8,
64 .val_bits = 8,
65 .cache_type = REGCACHE_RBTREE,
66 .max_register = PMIC_MAX_REGISTER_ADDRESS,
67 .rd_table = &stpmic1_readable_table,
68 .wr_table = &stpmic1_writeable_table,
69 .volatile_table = &stpmic1_volatile_table,
70};
71
72static const struct regmap_irq stpmic1_irqs[] = {
73 REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01),
74 REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02),
75 REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04),
76 REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08),
77 REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10),
78 REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20),
79 REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40),
80 REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80),
81
82 REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01),
83 REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02),
84 REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04),
85 REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08),
86 REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10),
87 REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20),
88 REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40),
89 REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80),
90
91 REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01),
92 REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02),
93 REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04),
94 REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08),
95 REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10),
96 REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20),
97 REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40),
98 REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80),
99
100 REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01),
101 REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02),
102 REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04),
103 REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08),
104 REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40),
105 REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80),
106};
107
108static const struct regmap_irq_chip stpmic1_regmap_irq_chip = {
109 .name = "pmic_irq",
110 .status_base = INT_PENDING_R1,
111 .mask_base = INT_CLEAR_MASK_R1,
112 .unmask_base = INT_SET_MASK_R1,
113 .ack_base = INT_CLEAR_R1,
114 .num_regs = STPMIC1_PMIC_NUM_IRQ_REGS,
115 .irqs = stpmic1_irqs,
116 .num_irqs = ARRAY_SIZE(stpmic1_irqs),
117};
118
119static int stpmic1_probe(struct i2c_client *i2c,
120 const struct i2c_device_id *id)
121{
122 struct stpmic1 *ddata;
123 struct device *dev = &i2c->dev;
124 int ret;
125 struct device_node *np = dev->of_node;
126 u32 reg;
127
128 ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL);
129 if (!ddata)
130 return -ENOMEM;
131
132 i2c_set_clientdata(i2c, ddata);
133 ddata->dev = dev;
134
135 ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config);
136 if (IS_ERR(ddata->regmap))
137 return PTR_ERR(ddata->regmap);
138
139 ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ);
140 if (ddata->irq < 0) {
141 dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq);
142 return ddata->irq;
143 }
144
145 ret = regmap_read(ddata->regmap, VERSION_SR, &reg);
146 if (ret) {
147 dev_err(dev, "Unable to read PMIC version\n");
148 return ret;
149 }
150 dev_info(dev, "PMIC Chip Version: 0x%x\n", reg);
151
152 /* Initialize PMIC IRQ Chip & associated IRQ domains */
153 ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
154 IRQF_ONESHOT | IRQF_SHARED,
155 0, &stpmic1_regmap_irq_chip,
156 &ddata->irq_data);
157 if (ret) {
158 dev_err(dev, "IRQ Chip registration failed: %d\n", ret);
159 return ret;
160 }
161
162 return devm_of_platform_populate(dev);
163}
164
165#ifdef CONFIG_PM_SLEEP
166static int stpmic1_suspend(struct device *dev)
167{
168 struct i2c_client *i2c = to_i2c_client(dev);
169 struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);
170
171 disable_irq(pmic_dev->irq);
172
173 return 0;
174}
175
176static int stpmic1_resume(struct device *dev)
177{
178 struct i2c_client *i2c = to_i2c_client(dev);
179 struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);
180 int ret;
181
182 ret = regcache_sync(pmic_dev->regmap);
183 if (ret)
184 return ret;
185
186 enable_irq(pmic_dev->irq);
187
188 return 0;
189}
190#endif
191
192static SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume);
193
194static const struct of_device_id stpmic1_of_match[] = {
195 { .compatible = "st,stpmic1", },
196 {},
197};
198MODULE_DEVICE_TABLE(of, stpmic1_of_match);
199
200static struct i2c_driver stpmic1_driver = {
201 .driver = {
202 .name = "stpmic1",
203 .of_match_table = of_match_ptr(stpmic1_of_match),
204 .pm = &stpmic1_pm,
205 },
206 .probe = stpmic1_probe,
207};
208
209module_i2c_driver(stpmic1_driver);
210
211MODULE_DESCRIPTION("STPMIC1 PMIC Driver");
212MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>");
213MODULE_LICENSE("GPL v2");
214