Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Open Menu / drivers / mfd / stpmic1.c
Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) STMicroelectronics 2018
// Author: Pascal Paillet <p.paillet@st.com>

#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/stpmic1.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/pm_wakeirq.h>
#include <linux/regmap.h>

#include <dt-bindings/mfd/st,stpmic1.h>

#define STPMIC1_MAIN_IRQ 0

static const struct regmap_range stpmic1_readable_ranges[] = {
	regmap_reg_range(TURN_ON_SR, VERSION_SR),
	regmap_reg_range(MAIN_CR, LDO6_STDBY_CR),
	regmap_reg_range(BST_SW_CR, BST_SW_CR),
	regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
	regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
	regmap_reg_range(INT_MASK_R1, INT_MASK_R4),
	regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
	regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
	regmap_reg_range(INT_SRC_R1, INT_SRC_R1),
};

static const struct regmap_range stpmic1_writeable_ranges[] = {
	regmap_reg_range(MAIN_CR, LDO6_STDBY_CR),
	regmap_reg_range(BST_SW_CR, BST_SW_CR),
	regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
	regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
	regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
};

static const struct regmap_range stpmic1_volatile_ranges[] = {
	regmap_reg_range(TURN_ON_SR, VERSION_SR),
	regmap_reg_range(WCHDG_CR, WCHDG_CR),
	regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
	regmap_reg_range(INT_SRC_R1, INT_SRC_R4),
};

static const struct regmap_access_table stpmic1_readable_table = {
	.yes_ranges = stpmic1_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges),
};

static const struct regmap_access_table stpmic1_writeable_table = {
	.yes_ranges = stpmic1_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges),
};

static const struct regmap_access_table stpmic1_volatile_table = {
	.yes_ranges = stpmic1_volatile_ranges,
	.n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges),
};

static const struct regmap_config stpmic1_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.cache_type = REGCACHE_RBTREE,
	.max_register = PMIC_MAX_REGISTER_ADDRESS,
	.rd_table = &stpmic1_readable_table,
	.wr_table = &stpmic1_writeable_table,
	.volatile_table = &stpmic1_volatile_table,
};

static const struct regmap_irq stpmic1_irqs[] = {
	REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01),
	REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02),
	REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04),
	REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08),
	REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10),
	REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20),
	REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40),
	REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80),

	REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01),
	REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02),
	REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04),
	REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08),
	REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10),
	REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20),
	REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40),
	REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80),

	REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01),
	REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02),
	REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04),
	REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08),
	REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10),
	REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20),
	REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40),
	REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80),

	REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01),
	REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02),
	REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04),
	REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08),
	REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40),
	REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80),
};

static const struct regmap_irq_chip stpmic1_regmap_irq_chip = {
	.name = "pmic_irq",
	.status_base = INT_PENDING_R1,
	.mask_base = INT_SET_MASK_R1,
	.unmask_base = INT_CLEAR_MASK_R1,
	.mask_unmask_non_inverted = true,
	.ack_base = INT_CLEAR_R1,
	.num_regs = STPMIC1_PMIC_NUM_IRQ_REGS,
	.irqs = stpmic1_irqs,
	.num_irqs = ARRAY_SIZE(stpmic1_irqs),
};

static int stpmic1_power_off(struct sys_off_data *data)
{
	struct stpmic1 *ddata = data->cb_data;

	regmap_update_bits(ddata->regmap, MAIN_CR,
			   SOFTWARE_SWITCH_OFF, SOFTWARE_SWITCH_OFF);

	return NOTIFY_DONE;
}

static int stpmic1_probe(struct i2c_client *i2c)
{
	struct stpmic1 *ddata;
	struct device *dev = &i2c->dev;
	int ret;
	struct device_node *np = dev->of_node;
	u32 reg;

	ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL);
	if (!ddata)
		return -ENOMEM;

	i2c_set_clientdata(i2c, ddata);
	ddata->dev = dev;

	ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config);
	if (IS_ERR(ddata->regmap))
		return PTR_ERR(ddata->regmap);

	ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ);
	if (ddata->irq < 0) {
		dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq);
		return ddata->irq;
	}

	ret = regmap_read(ddata->regmap, VERSION_SR, &reg);
	if (ret) {
		dev_err(dev, "Unable to read PMIC version\n");
		return ret;
	}
	dev_info(dev, "PMIC Chip Version: 0x%x\n", reg);

	/* Initialize PMIC IRQ Chip & associated IRQ domains */
	ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
				       IRQF_ONESHOT | IRQF_SHARED,
				       0, &stpmic1_regmap_irq_chip,
				       &ddata->irq_data);
	if (ret) {
		dev_err(dev, "IRQ Chip registration failed: %d\n", ret);
		return ret;
	}

	ret = devm_register_sys_off_handler(ddata->dev,
					    SYS_OFF_MODE_POWER_OFF,
					    SYS_OFF_PRIO_DEFAULT,
					    stpmic1_power_off,
					    ddata);
	if (ret) {
		dev_err(ddata->dev, "failed to register sys-off handler: %d\n", ret);
		return ret;
	}

	return devm_of_platform_populate(dev);
}

static int stpmic1_suspend(struct device *dev)
{
	struct i2c_client *i2c = to_i2c_client(dev);
	struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);

	disable_irq(pmic_dev->irq);

	return 0;
}

static int stpmic1_resume(struct device *dev)
{
	struct i2c_client *i2c = to_i2c_client(dev);
	struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);
	int ret;

	ret = regcache_sync(pmic_dev->regmap);
	if (ret)
		return ret;

	enable_irq(pmic_dev->irq);

	return 0;
}

static DEFINE_SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume);

static const struct of_device_id stpmic1_of_match[] = {
	{ .compatible = "st,stpmic1", },
	{},
};
MODULE_DEVICE_TABLE(of, stpmic1_of_match);

static struct i2c_driver stpmic1_driver = {
	.driver = {
		.name = "stpmic1",
		.of_match_table = stpmic1_of_match,
		.pm = pm_sleep_ptr(&stpmic1_pm),
	},
	.probe = stpmic1_probe,
};

module_i2c_driver(stpmic1_driver);

MODULE_DESCRIPTION("STPMIC1 PMIC Driver");
MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>");
MODULE_LICENSE("GPL v2");