12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
238c09961SWenyou Yang /*
338c09961SWenyou Yang * Voltage regulation driver for active-semi ACT8945A PMIC
438c09961SWenyou Yang *
538c09961SWenyou Yang * Copyright (C) 2015 Atmel Corporation
638c09961SWenyou Yang *
738c09961SWenyou Yang * Author: Wenyou Yang <wenyou.yang@atmel.com>
838c09961SWenyou Yang */
938c09961SWenyou Yang
1038c09961SWenyou Yang #include <linux/module.h>
11*045a44d4SRob Herring #include <linux/of.h>
1238c09961SWenyou Yang #include <linux/platform_device.h>
1390bc8ac2SClaudiu Beznea #include <linux/regmap.h>
1438c09961SWenyou Yang #include <linux/regulator/driver.h>
1538c09961SWenyou Yang #include <linux/regulator/machine.h>
167482d6ecSBoris Brezillon #include <dt-bindings/regulator/active-semi,8945a-regulator.h>
1738c09961SWenyou Yang
1880332ec8SRandy Dunlap /*
1938c09961SWenyou Yang * ACT8945A Global Register Map.
2038c09961SWenyou Yang */
2138c09961SWenyou Yang #define ACT8945A_SYS_MODE 0x00
2238c09961SWenyou Yang #define ACT8945A_SYS_CTRL 0x01
2390bc8ac2SClaudiu Beznea #define ACT8945A_SYS_UNLK_REGS 0x0b
2438c09961SWenyou Yang #define ACT8945A_DCDC1_VSET1 0x20
2538c09961SWenyou Yang #define ACT8945A_DCDC1_VSET2 0x21
2638c09961SWenyou Yang #define ACT8945A_DCDC1_CTRL 0x22
277482d6ecSBoris Brezillon #define ACT8945A_DCDC1_SUS 0x24
2838c09961SWenyou Yang #define ACT8945A_DCDC2_VSET1 0x30
2938c09961SWenyou Yang #define ACT8945A_DCDC2_VSET2 0x31
3038c09961SWenyou Yang #define ACT8945A_DCDC2_CTRL 0x32
317482d6ecSBoris Brezillon #define ACT8945A_DCDC2_SUS 0x34
3238c09961SWenyou Yang #define ACT8945A_DCDC3_VSET1 0x40
3338c09961SWenyou Yang #define ACT8945A_DCDC3_VSET2 0x41
3438c09961SWenyou Yang #define ACT8945A_DCDC3_CTRL 0x42
357482d6ecSBoris Brezillon #define ACT8945A_DCDC3_SUS 0x44
3638c09961SWenyou Yang #define ACT8945A_LDO1_VSET 0x50
3738c09961SWenyou Yang #define ACT8945A_LDO1_CTRL 0x51
387482d6ecSBoris Brezillon #define ACT8945A_LDO1_SUS 0x52
3938c09961SWenyou Yang #define ACT8945A_LDO2_VSET 0x54
4038c09961SWenyou Yang #define ACT8945A_LDO2_CTRL 0x55
417482d6ecSBoris Brezillon #define ACT8945A_LDO2_SUS 0x56
4238c09961SWenyou Yang #define ACT8945A_LDO3_VSET 0x60
4338c09961SWenyou Yang #define ACT8945A_LDO3_CTRL 0x61
447482d6ecSBoris Brezillon #define ACT8945A_LDO3_SUS 0x62
4538c09961SWenyou Yang #define ACT8945A_LDO4_VSET 0x64
4638c09961SWenyou Yang #define ACT8945A_LDO4_CTRL 0x65
477482d6ecSBoris Brezillon #define ACT8945A_LDO4_SUS 0x66
4838c09961SWenyou Yang
4980332ec8SRandy Dunlap /*
5038c09961SWenyou Yang * Field Definitions.
5138c09961SWenyou Yang */
5238c09961SWenyou Yang #define ACT8945A_ENA 0x80 /* ON - [7] */
5338c09961SWenyou Yang #define ACT8945A_VSEL_MASK 0x3F /* VSET - [5:0] */
5438c09961SWenyou Yang
5580332ec8SRandy Dunlap /*
5638c09961SWenyou Yang * ACT8945A Voltage Number
5738c09961SWenyou Yang */
5838c09961SWenyou Yang #define ACT8945A_VOLTAGE_NUM 64
5938c09961SWenyou Yang
6038c09961SWenyou Yang enum {
6138c09961SWenyou Yang ACT8945A_ID_DCDC1,
6238c09961SWenyou Yang ACT8945A_ID_DCDC2,
6338c09961SWenyou Yang ACT8945A_ID_DCDC3,
6438c09961SWenyou Yang ACT8945A_ID_LDO1,
6538c09961SWenyou Yang ACT8945A_ID_LDO2,
6638c09961SWenyou Yang ACT8945A_ID_LDO3,
6738c09961SWenyou Yang ACT8945A_ID_LDO4,
687482d6ecSBoris Brezillon ACT8945A_ID_MAX,
697482d6ecSBoris Brezillon };
707482d6ecSBoris Brezillon
717482d6ecSBoris Brezillon struct act8945a_pmic {
727482d6ecSBoris Brezillon struct regmap *regmap;
737482d6ecSBoris Brezillon u32 op_mode[ACT8945A_ID_MAX];
7438c09961SWenyou Yang };
7538c09961SWenyou Yang
7660ab7f41SMatti Vaittinen static const struct linear_range act8945a_voltage_ranges[] = {
7738c09961SWenyou Yang REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
7838c09961SWenyou Yang REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
7938c09961SWenyou Yang REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
8038c09961SWenyou Yang };
8138c09961SWenyou Yang
act8945a_set_suspend_state(struct regulator_dev * rdev,bool enable)827482d6ecSBoris Brezillon static int act8945a_set_suspend_state(struct regulator_dev *rdev, bool enable)
837482d6ecSBoris Brezillon {
847482d6ecSBoris Brezillon struct regmap *regmap = rdev->regmap;
85557ce9d7SAxel Lin int id = rdev_get_id(rdev);
86557ce9d7SAxel Lin int reg, val;
877482d6ecSBoris Brezillon
887482d6ecSBoris Brezillon switch (id) {
897482d6ecSBoris Brezillon case ACT8945A_ID_DCDC1:
907482d6ecSBoris Brezillon reg = ACT8945A_DCDC1_SUS;
917482d6ecSBoris Brezillon val = 0xa8;
927482d6ecSBoris Brezillon break;
937482d6ecSBoris Brezillon case ACT8945A_ID_DCDC2:
947482d6ecSBoris Brezillon reg = ACT8945A_DCDC2_SUS;
957482d6ecSBoris Brezillon val = 0xa8;
967482d6ecSBoris Brezillon break;
977482d6ecSBoris Brezillon case ACT8945A_ID_DCDC3:
987482d6ecSBoris Brezillon reg = ACT8945A_DCDC3_SUS;
997482d6ecSBoris Brezillon val = 0xa8;
1007482d6ecSBoris Brezillon break;
1017482d6ecSBoris Brezillon case ACT8945A_ID_LDO1:
1027482d6ecSBoris Brezillon reg = ACT8945A_LDO1_SUS;
1037482d6ecSBoris Brezillon val = 0xe8;
1047482d6ecSBoris Brezillon break;
1057482d6ecSBoris Brezillon case ACT8945A_ID_LDO2:
1067482d6ecSBoris Brezillon reg = ACT8945A_LDO2_SUS;
1077482d6ecSBoris Brezillon val = 0xe8;
1087482d6ecSBoris Brezillon break;
1097482d6ecSBoris Brezillon case ACT8945A_ID_LDO3:
1107482d6ecSBoris Brezillon reg = ACT8945A_LDO3_SUS;
1117482d6ecSBoris Brezillon val = 0xe8;
1127482d6ecSBoris Brezillon break;
1137482d6ecSBoris Brezillon case ACT8945A_ID_LDO4:
1147482d6ecSBoris Brezillon reg = ACT8945A_LDO4_SUS;
1157482d6ecSBoris Brezillon val = 0xe8;
1167482d6ecSBoris Brezillon break;
1177482d6ecSBoris Brezillon default:
1187482d6ecSBoris Brezillon return -EINVAL;
1197482d6ecSBoris Brezillon }
1207482d6ecSBoris Brezillon
1217482d6ecSBoris Brezillon if (enable)
1227482d6ecSBoris Brezillon val |= BIT(4);
1237482d6ecSBoris Brezillon
1247482d6ecSBoris Brezillon /*
1257482d6ecSBoris Brezillon * Ask the PMIC to enable/disable this output when entering hibernate
1267482d6ecSBoris Brezillon * mode.
1277482d6ecSBoris Brezillon */
1287482d6ecSBoris Brezillon return regmap_write(regmap, reg, val);
1297482d6ecSBoris Brezillon }
1307482d6ecSBoris Brezillon
act8945a_set_suspend_enable(struct regulator_dev * rdev)1317482d6ecSBoris Brezillon static int act8945a_set_suspend_enable(struct regulator_dev *rdev)
1327482d6ecSBoris Brezillon {
1337482d6ecSBoris Brezillon return act8945a_set_suspend_state(rdev, true);
1347482d6ecSBoris Brezillon }
1357482d6ecSBoris Brezillon
act8945a_set_suspend_disable(struct regulator_dev * rdev)1367482d6ecSBoris Brezillon static int act8945a_set_suspend_disable(struct regulator_dev *rdev)
1377482d6ecSBoris Brezillon {
1387482d6ecSBoris Brezillon return act8945a_set_suspend_state(rdev, false);
1397482d6ecSBoris Brezillon }
1407482d6ecSBoris Brezillon
act8945a_of_map_mode(unsigned int mode)1417482d6ecSBoris Brezillon static unsigned int act8945a_of_map_mode(unsigned int mode)
1427482d6ecSBoris Brezillon {
1437482d6ecSBoris Brezillon switch (mode) {
1447482d6ecSBoris Brezillon case ACT8945A_REGULATOR_MODE_FIXED:
1457482d6ecSBoris Brezillon case ACT8945A_REGULATOR_MODE_NORMAL:
1467482d6ecSBoris Brezillon return REGULATOR_MODE_NORMAL;
1477482d6ecSBoris Brezillon case ACT8945A_REGULATOR_MODE_LOWPOWER:
1487482d6ecSBoris Brezillon return REGULATOR_MODE_STANDBY;
1497482d6ecSBoris Brezillon default:
1507482d6ecSBoris Brezillon return REGULATOR_MODE_INVALID;
1517482d6ecSBoris Brezillon }
1527482d6ecSBoris Brezillon }
1537482d6ecSBoris Brezillon
act8945a_set_mode(struct regulator_dev * rdev,unsigned int mode)1547482d6ecSBoris Brezillon static int act8945a_set_mode(struct regulator_dev *rdev, unsigned int mode)
1557482d6ecSBoris Brezillon {
1567482d6ecSBoris Brezillon struct act8945a_pmic *act8945a = rdev_get_drvdata(rdev);
1577482d6ecSBoris Brezillon struct regmap *regmap = rdev->regmap;
158557ce9d7SAxel Lin int id = rdev_get_id(rdev);
1597482d6ecSBoris Brezillon int reg, ret, val = 0;
1607482d6ecSBoris Brezillon
1617482d6ecSBoris Brezillon switch (id) {
1627482d6ecSBoris Brezillon case ACT8945A_ID_DCDC1:
1637482d6ecSBoris Brezillon reg = ACT8945A_DCDC1_CTRL;
1647482d6ecSBoris Brezillon break;
1657482d6ecSBoris Brezillon case ACT8945A_ID_DCDC2:
1667482d6ecSBoris Brezillon reg = ACT8945A_DCDC2_CTRL;
1677482d6ecSBoris Brezillon break;
1687482d6ecSBoris Brezillon case ACT8945A_ID_DCDC3:
1697482d6ecSBoris Brezillon reg = ACT8945A_DCDC3_CTRL;
1707482d6ecSBoris Brezillon break;
1717482d6ecSBoris Brezillon case ACT8945A_ID_LDO1:
1725d2fc542SRaag Jadav reg = ACT8945A_LDO1_CTRL;
1737482d6ecSBoris Brezillon break;
1747482d6ecSBoris Brezillon case ACT8945A_ID_LDO2:
1755d2fc542SRaag Jadav reg = ACT8945A_LDO2_CTRL;
1767482d6ecSBoris Brezillon break;
1777482d6ecSBoris Brezillon case ACT8945A_ID_LDO3:
1785d2fc542SRaag Jadav reg = ACT8945A_LDO3_CTRL;
1797482d6ecSBoris Brezillon break;
1807482d6ecSBoris Brezillon case ACT8945A_ID_LDO4:
1815d2fc542SRaag Jadav reg = ACT8945A_LDO4_CTRL;
1827482d6ecSBoris Brezillon break;
1837482d6ecSBoris Brezillon default:
1847482d6ecSBoris Brezillon return -EINVAL;
1857482d6ecSBoris Brezillon }
1867482d6ecSBoris Brezillon
1877482d6ecSBoris Brezillon switch (mode) {
1887482d6ecSBoris Brezillon case REGULATOR_MODE_STANDBY:
189557ce9d7SAxel Lin if (id > ACT8945A_ID_DCDC3)
1907482d6ecSBoris Brezillon val = BIT(5);
1917482d6ecSBoris Brezillon break;
1927482d6ecSBoris Brezillon case REGULATOR_MODE_NORMAL:
193557ce9d7SAxel Lin if (id <= ACT8945A_ID_DCDC3)
1947482d6ecSBoris Brezillon val = BIT(5);
1957482d6ecSBoris Brezillon break;
1967482d6ecSBoris Brezillon default:
1977482d6ecSBoris Brezillon return -EINVAL;
1987482d6ecSBoris Brezillon }
1997482d6ecSBoris Brezillon
2007482d6ecSBoris Brezillon ret = regmap_update_bits(regmap, reg, BIT(5), val);
2017482d6ecSBoris Brezillon if (ret)
2027482d6ecSBoris Brezillon return ret;
2037482d6ecSBoris Brezillon
2047482d6ecSBoris Brezillon act8945a->op_mode[id] = mode;
2057482d6ecSBoris Brezillon
2067482d6ecSBoris Brezillon return 0;
2077482d6ecSBoris Brezillon }
2087482d6ecSBoris Brezillon
act8945a_get_mode(struct regulator_dev * rdev)2097482d6ecSBoris Brezillon static unsigned int act8945a_get_mode(struct regulator_dev *rdev)
2107482d6ecSBoris Brezillon {
2117482d6ecSBoris Brezillon struct act8945a_pmic *act8945a = rdev_get_drvdata(rdev);
212557ce9d7SAxel Lin int id = rdev_get_id(rdev);
2137482d6ecSBoris Brezillon
2147482d6ecSBoris Brezillon if (id < ACT8945A_ID_DCDC1 || id >= ACT8945A_ID_MAX)
2157482d6ecSBoris Brezillon return -EINVAL;
2167482d6ecSBoris Brezillon
2177482d6ecSBoris Brezillon return act8945a->op_mode[id];
2187482d6ecSBoris Brezillon }
2197482d6ecSBoris Brezillon
2201ed1da3cSBhumika Goyal static const struct regulator_ops act8945a_ops = {
22138c09961SWenyou Yang .list_voltage = regulator_list_voltage_linear_range,
22238c09961SWenyou Yang .map_voltage = regulator_map_voltage_linear_range,
22338c09961SWenyou Yang .get_voltage_sel = regulator_get_voltage_sel_regmap,
22438c09961SWenyou Yang .set_voltage_sel = regulator_set_voltage_sel_regmap,
22538c09961SWenyou Yang .enable = regulator_enable_regmap,
22638c09961SWenyou Yang .disable = regulator_disable_regmap,
2277482d6ecSBoris Brezillon .set_mode = act8945a_set_mode,
2287482d6ecSBoris Brezillon .get_mode = act8945a_get_mode,
22938c09961SWenyou Yang .is_enabled = regulator_is_enabled_regmap,
2307482d6ecSBoris Brezillon .set_suspend_enable = act8945a_set_suspend_enable,
2317482d6ecSBoris Brezillon .set_suspend_disable = act8945a_set_suspend_disable,
23238c09961SWenyou Yang };
23338c09961SWenyou Yang
23438c09961SWenyou Yang #define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply) \
23538c09961SWenyou Yang [_family##_ID_##_id] = { \
23638c09961SWenyou Yang .name = _name, \
23738c09961SWenyou Yang .supply_name = _supply, \
23838c09961SWenyou Yang .of_match = of_match_ptr("REG_"#_id), \
2397482d6ecSBoris Brezillon .of_map_mode = act8945a_of_map_mode, \
24038c09961SWenyou Yang .regulators_node = of_match_ptr("regulators"), \
24138c09961SWenyou Yang .id = _family##_ID_##_id, \
24238c09961SWenyou Yang .type = REGULATOR_VOLTAGE, \
24338c09961SWenyou Yang .ops = &act8945a_ops, \
24438c09961SWenyou Yang .n_voltages = ACT8945A_VOLTAGE_NUM, \
24538c09961SWenyou Yang .linear_ranges = act8945a_voltage_ranges, \
24638c09961SWenyou Yang .n_linear_ranges = ARRAY_SIZE(act8945a_voltage_ranges), \
24738c09961SWenyou Yang .vsel_reg = _family##_##_id##_##_vsel_reg, \
24838c09961SWenyou Yang .vsel_mask = ACT8945A_VSEL_MASK, \
24938c09961SWenyou Yang .enable_reg = _family##_##_id##_CTRL, \
25038c09961SWenyou Yang .enable_mask = ACT8945A_ENA, \
25138c09961SWenyou Yang .owner = THIS_MODULE, \
25238c09961SWenyou Yang }
25338c09961SWenyou Yang
25438c09961SWenyou Yang static const struct regulator_desc act8945a_regulators[] = {
25538c09961SWenyou Yang ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"),
25638c09961SWenyou Yang ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"),
25738c09961SWenyou Yang ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"),
25838c09961SWenyou Yang ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
25938c09961SWenyou Yang ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
26038c09961SWenyou Yang ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
26138c09961SWenyou Yang ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
26238c09961SWenyou Yang };
26338c09961SWenyou Yang
26438c09961SWenyou Yang static const struct regulator_desc act8945a_alt_regulators[] = {
26538c09961SWenyou Yang ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"),
26638c09961SWenyou Yang ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"),
26738c09961SWenyou Yang ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"),
26838c09961SWenyou Yang ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
26938c09961SWenyou Yang ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
27038c09961SWenyou Yang ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
27138c09961SWenyou Yang ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
27238c09961SWenyou Yang };
27338c09961SWenyou Yang
act8945a_pmic_probe(struct platform_device * pdev)27438c09961SWenyou Yang static int act8945a_pmic_probe(struct platform_device *pdev)
27538c09961SWenyou Yang {
27638c09961SWenyou Yang struct regulator_config config = { };
27738c09961SWenyou Yang const struct regulator_desc *regulators;
2787482d6ecSBoris Brezillon struct act8945a_pmic *act8945a;
27938c09961SWenyou Yang struct regulator_dev *rdev;
28038c09961SWenyou Yang int i, num_regulators;
28138c09961SWenyou Yang bool voltage_select;
28238c09961SWenyou Yang
2837482d6ecSBoris Brezillon act8945a = devm_kzalloc(&pdev->dev, sizeof(*act8945a), GFP_KERNEL);
2847482d6ecSBoris Brezillon if (!act8945a)
2857482d6ecSBoris Brezillon return -ENOMEM;
2867482d6ecSBoris Brezillon
2877482d6ecSBoris Brezillon act8945a->regmap = dev_get_regmap(pdev->dev.parent, NULL);
2887482d6ecSBoris Brezillon if (!act8945a->regmap) {
28990bc8ac2SClaudiu Beznea dev_err(&pdev->dev,
29090bc8ac2SClaudiu Beznea "could not retrieve regmap from parent device\n");
29190bc8ac2SClaudiu Beznea return -EINVAL;
29290bc8ac2SClaudiu Beznea }
29390bc8ac2SClaudiu Beznea
29438c09961SWenyou Yang voltage_select = of_property_read_bool(pdev->dev.parent->of_node,
29538c09961SWenyou Yang "active-semi,vsel-high");
29638c09961SWenyou Yang
29738c09961SWenyou Yang if (voltage_select) {
29838c09961SWenyou Yang regulators = act8945a_alt_regulators;
29938c09961SWenyou Yang num_regulators = ARRAY_SIZE(act8945a_alt_regulators);
30038c09961SWenyou Yang } else {
30138c09961SWenyou Yang regulators = act8945a_regulators;
30238c09961SWenyou Yang num_regulators = ARRAY_SIZE(act8945a_regulators);
30338c09961SWenyou Yang }
30438c09961SWenyou Yang
30538c09961SWenyou Yang config.dev = &pdev->dev;
30638c09961SWenyou Yang config.dev->of_node = pdev->dev.parent->of_node;
3077482d6ecSBoris Brezillon config.driver_data = act8945a;
30838c09961SWenyou Yang for (i = 0; i < num_regulators; i++) {
30903ffbf9cSClaudiu Beznea rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
31003ffbf9cSClaudiu Beznea &config);
31138c09961SWenyou Yang if (IS_ERR(rdev)) {
31238c09961SWenyou Yang dev_err(&pdev->dev,
31338c09961SWenyou Yang "failed to register %s regulator\n",
31438c09961SWenyou Yang regulators[i].name);
31538c09961SWenyou Yang return PTR_ERR(rdev);
31638c09961SWenyou Yang }
31738c09961SWenyou Yang }
31838c09961SWenyou Yang
3197482d6ecSBoris Brezillon platform_set_drvdata(pdev, act8945a);
3207482d6ecSBoris Brezillon
32190bc8ac2SClaudiu Beznea /* Unlock expert registers. */
3227482d6ecSBoris Brezillon return regmap_write(act8945a->regmap, ACT8945A_SYS_UNLK_REGS, 0xef);
32338c09961SWenyou Yang }
32438c09961SWenyou Yang
act8945a_suspend(struct device * pdev)32522a5a4a4SClaudiu Beznea static int __maybe_unused act8945a_suspend(struct device *pdev)
3267482d6ecSBoris Brezillon {
3277482d6ecSBoris Brezillon struct act8945a_pmic *act8945a = dev_get_drvdata(pdev);
3287482d6ecSBoris Brezillon
3297482d6ecSBoris Brezillon /*
3307482d6ecSBoris Brezillon * Ask the PMIC to enter the suspend mode on the next PWRHLD
3317482d6ecSBoris Brezillon * transition.
3327482d6ecSBoris Brezillon */
3337482d6ecSBoris Brezillon return regmap_write(act8945a->regmap, ACT8945A_SYS_CTRL, 0x42);
3347482d6ecSBoris Brezillon }
3357482d6ecSBoris Brezillon
33678e6fbf3SWei Yongjun static SIMPLE_DEV_PM_OPS(act8945a_pm, act8945a_suspend, NULL);
3377482d6ecSBoris Brezillon
act8945a_pmic_shutdown(struct platform_device * pdev)338b5ebba46SClaudiu Beznea static void act8945a_pmic_shutdown(struct platform_device *pdev)
339b5ebba46SClaudiu Beznea {
340b5ebba46SClaudiu Beznea struct act8945a_pmic *act8945a = platform_get_drvdata(pdev);
341b5ebba46SClaudiu Beznea
342b5ebba46SClaudiu Beznea /*
343b5ebba46SClaudiu Beznea * Ask the PMIC to shutdown everything on the next PWRHLD transition.
344b5ebba46SClaudiu Beznea */
345b5ebba46SClaudiu Beznea regmap_write(act8945a->regmap, ACT8945A_SYS_CTRL, 0x0);
346b5ebba46SClaudiu Beznea }
347b5ebba46SClaudiu Beznea
34838c09961SWenyou Yang static struct platform_driver act8945a_pmic_driver = {
34938c09961SWenyou Yang .driver = {
35038c09961SWenyou Yang .name = "act8945a-regulator",
351259b93b2SDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS,
3527482d6ecSBoris Brezillon .pm = &act8945a_pm,
35338c09961SWenyou Yang },
35438c09961SWenyou Yang .probe = act8945a_pmic_probe,
355b5ebba46SClaudiu Beznea .shutdown = act8945a_pmic_shutdown,
35638c09961SWenyou Yang };
35738c09961SWenyou Yang module_platform_driver(act8945a_pmic_driver);
35838c09961SWenyou Yang
35938c09961SWenyou Yang MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver");
36038c09961SWenyou Yang MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
36138c09961SWenyou Yang MODULE_LICENSE("GPL");
362