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1// SPDX-License-Identifier: GPL-2.0-only
2//
3// Qualcomm PMIC VBUS output regulator driver
4//
5// Copyright (c) 2020, The Linux Foundation. All rights reserved.
6
7#include <linux/module.h>
8#include <linux/err.h>
9#include <linux/kernel.h>
10#include <linux/of.h>
11#include <linux/of_device.h>
12#include <linux/platform_device.h>
13#include <linux/regulator/driver.h>
14#include <linux/regulator/of_regulator.h>
15#include <linux/regmap.h>
16
17#define CMD_OTG 0x40
18#define OTG_EN BIT(0)
19#define OTG_CFG 0x53
20#define OTG_EN_SRC_CFG BIT(1)
21
22static const struct regulator_ops qcom_usb_vbus_reg_ops = {
23 .enable = regulator_enable_regmap,
24 .disable = regulator_disable_regmap,
25 .is_enabled = regulator_is_enabled_regmap,
26};
27
28static struct regulator_desc qcom_usb_vbus_rdesc = {
29 .name = "usb_vbus",
30 .ops = &qcom_usb_vbus_reg_ops,
31 .owner = THIS_MODULE,
32 .type = REGULATOR_VOLTAGE,
33};
34
35static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev)
36{
37 struct device *dev = &pdev->dev;
38 struct regulator_dev *rdev;
39 struct regmap *regmap;
40 struct regulator_config config = { };
41 struct regulator_init_data *init_data;
42 int ret;
43 u32 base;
44
45 ret = of_property_read_u32(dev->of_node, "reg", &base);
46 if (ret < 0) {
47 dev_err(dev, "no base address found\n");
48 return ret;
49 }
50
51 regmap = dev_get_regmap(dev->parent, NULL);
52 if (!regmap) {
53 dev_err(dev, "Failed to get regmap\n");
54 return -ENOENT;
55 }
56
57 init_data = of_get_regulator_init_data(dev, dev->of_node,
58 &qcom_usb_vbus_rdesc);
59 if (!init_data)
60 return -ENOMEM;
61
62 qcom_usb_vbus_rdesc.enable_reg = base + CMD_OTG;
63 qcom_usb_vbus_rdesc.enable_mask = OTG_EN;
64 config.dev = dev;
65 config.init_data = init_data;
66 config.regmap = regmap;
67
68 rdev = devm_regulator_register(dev, &qcom_usb_vbus_rdesc, &config);
69 if (IS_ERR(rdev)) {
70 ret = PTR_ERR(rdev);
71 dev_err(dev, "not able to register vbus reg %d\n", ret);
72 return ret;
73 }
74
75 /* Disable HW logic for VBUS enable */
76 regmap_update_bits(regmap, base + OTG_CFG, OTG_EN_SRC_CFG, 0);
77
78 return 0;
79}
80
81static const struct of_device_id qcom_usb_vbus_regulator_match[] = {
82 { .compatible = "qcom,pm8150b-vbus-reg" },
83 { }
84};
85MODULE_DEVICE_TABLE(of, qcom_usb_vbus_regulator_match);
86
87static struct platform_driver qcom_usb_vbus_regulator_driver = {
88 .driver = {
89 .name = "qcom-usb-vbus-regulator",
90 .of_match_table = qcom_usb_vbus_regulator_match,
91 },
92 .probe = qcom_usb_vbus_regulator_probe,
93};
94module_platform_driver(qcom_usb_vbus_regulator_driver);
95
96MODULE_DESCRIPTION("Qualcomm USB vbus regulator driver");
97MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2//
3// Qualcomm PMIC VBUS output regulator driver
4//
5// Copyright (c) 2020, The Linux Foundation. All rights reserved.
6
7#include <linux/module.h>
8#include <linux/err.h>
9#include <linux/kernel.h>
10#include <linux/of.h>
11#include <linux/of_device.h>
12#include <linux/platform_device.h>
13#include <linux/regulator/driver.h>
14#include <linux/regulator/of_regulator.h>
15#include <linux/regmap.h>
16
17#define CMD_OTG 0x40
18#define OTG_EN BIT(0)
19#define OTG_CURRENT_LIMIT_CFG 0x52
20#define OTG_CURRENT_LIMIT_MASK GENMASK(2, 0)
21#define OTG_CFG 0x53
22#define OTG_EN_SRC_CFG BIT(1)
23
24static const unsigned int curr_table[] = {
25 500000, 1000000, 1500000, 2000000, 2500000, 3000000,
26};
27
28static const struct regulator_ops qcom_usb_vbus_reg_ops = {
29 .enable = regulator_enable_regmap,
30 .disable = regulator_disable_regmap,
31 .is_enabled = regulator_is_enabled_regmap,
32 .get_current_limit = regulator_get_current_limit_regmap,
33 .set_current_limit = regulator_set_current_limit_regmap,
34};
35
36static struct regulator_desc qcom_usb_vbus_rdesc = {
37 .name = "usb_vbus",
38 .ops = &qcom_usb_vbus_reg_ops,
39 .owner = THIS_MODULE,
40 .type = REGULATOR_VOLTAGE,
41 .curr_table = curr_table,
42 .n_current_limits = ARRAY_SIZE(curr_table),
43};
44
45static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev)
46{
47 struct device *dev = &pdev->dev;
48 struct regulator_dev *rdev;
49 struct regmap *regmap;
50 struct regulator_config config = { };
51 struct regulator_init_data *init_data;
52 int ret;
53 u32 base;
54
55 ret = of_property_read_u32(dev->of_node, "reg", &base);
56 if (ret < 0) {
57 dev_err(dev, "no base address found\n");
58 return ret;
59 }
60
61 regmap = dev_get_regmap(dev->parent, NULL);
62 if (!regmap) {
63 dev_err(dev, "Failed to get regmap\n");
64 return -ENOENT;
65 }
66
67 init_data = of_get_regulator_init_data(dev, dev->of_node,
68 &qcom_usb_vbus_rdesc);
69 if (!init_data)
70 return -ENOMEM;
71
72 qcom_usb_vbus_rdesc.enable_reg = base + CMD_OTG;
73 qcom_usb_vbus_rdesc.enable_mask = OTG_EN;
74 qcom_usb_vbus_rdesc.csel_reg = base + OTG_CURRENT_LIMIT_CFG;
75 qcom_usb_vbus_rdesc.csel_mask = OTG_CURRENT_LIMIT_MASK;
76 config.dev = dev;
77 config.init_data = init_data;
78 config.of_node = dev->of_node;
79 config.regmap = regmap;
80
81 rdev = devm_regulator_register(dev, &qcom_usb_vbus_rdesc, &config);
82 if (IS_ERR(rdev)) {
83 ret = PTR_ERR(rdev);
84 dev_err(dev, "not able to register vbus reg %d\n", ret);
85 return ret;
86 }
87
88 /* Disable HW logic for VBUS enable */
89 regmap_update_bits(regmap, base + OTG_CFG, OTG_EN_SRC_CFG, 0);
90
91 return 0;
92}
93
94static const struct of_device_id qcom_usb_vbus_regulator_match[] = {
95 { .compatible = "qcom,pm8150b-vbus-reg" },
96 { }
97};
98MODULE_DEVICE_TABLE(of, qcom_usb_vbus_regulator_match);
99
100static struct platform_driver qcom_usb_vbus_regulator_driver = {
101 .driver = {
102 .name = "qcom-usb-vbus-regulator",
103 .of_match_table = qcom_usb_vbus_regulator_match,
104 },
105 .probe = qcom_usb_vbus_regulator_probe,
106};
107module_platform_driver(qcom_usb_vbus_regulator_driver);
108
109MODULE_DESCRIPTION("Qualcomm USB vbus regulator driver");
110MODULE_LICENSE("GPL v2");