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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Device driver for Hi6421 PMIC
4 *
5 * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
6 * http://www.hisilicon.com
7 * Copyright (c) <2013-2017> Linaro Ltd.
8 * https://www.linaro.org
9 *
10 * Author: Guodong Xu <guodong.xu@linaro.org>
11 */
12
13#include <linux/device.h>
14#include <linux/err.h>
15#include <linux/mfd/core.h>
16#include <linux/mfd/hi6421-pmic.h>
17#include <linux/module.h>
18#include <linux/of_device.h>
19#include <linux/platform_device.h>
20#include <linux/regmap.h>
21
22static const struct mfd_cell hi6421_devs[] = {
23 { .name = "hi6421-regulator", },
24};
25
26static const struct mfd_cell hi6421v530_devs[] = {
27 { .name = "hi6421v530-regulator", },
28};
29
30static const struct regmap_config hi6421_regmap_config = {
31 .reg_bits = 32,
32 .reg_stride = 4,
33 .val_bits = 8,
34 .max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
35};
36
37static const struct of_device_id of_hi6421_pmic_match[] = {
38 {
39 .compatible = "hisilicon,hi6421-pmic",
40 .data = (void *)HI6421
41 },
42 {
43 .compatible = "hisilicon,hi6421v530-pmic",
44 .data = (void *)HI6421_V530
45 },
46 { },
47};
48MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match);
49
50static int hi6421_pmic_probe(struct platform_device *pdev)
51{
52 struct hi6421_pmic *pmic;
53 struct resource *res;
54 const struct of_device_id *id;
55 const struct mfd_cell *subdevs;
56 enum hi6421_type type;
57 void __iomem *base;
58 int n_subdevs, ret;
59
60 id = of_match_device(of_hi6421_pmic_match, &pdev->dev);
61 if (!id)
62 return -EINVAL;
63 type = (enum hi6421_type)id->data;
64
65 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
66 if (!pmic)
67 return -ENOMEM;
68
69 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
70 base = devm_ioremap_resource(&pdev->dev, res);
71 if (IS_ERR(base))
72 return PTR_ERR(base);
73
74 pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
75 &hi6421_regmap_config);
76 if (IS_ERR(pmic->regmap)) {
77 dev_err(&pdev->dev, "Failed to initialise Regmap: %ld\n",
78 PTR_ERR(pmic->regmap));
79 return PTR_ERR(pmic->regmap);
80 }
81
82 platform_set_drvdata(pdev, pmic);
83
84 switch (type) {
85 case HI6421:
86 /* set over-current protection debounce 8ms */
87 regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
88 (HI6421_OCP_DEB_SEL_MASK
89 | HI6421_OCP_EN_DEBOUNCE_MASK
90 | HI6421_OCP_AUTO_STOP_MASK),
91 (HI6421_OCP_DEB_SEL_8MS
92 | HI6421_OCP_EN_DEBOUNCE_ENABLE));
93
94 subdevs = hi6421_devs;
95 n_subdevs = ARRAY_SIZE(hi6421_devs);
96 break;
97 case HI6421_V530:
98 subdevs = hi6421v530_devs;
99 n_subdevs = ARRAY_SIZE(hi6421v530_devs);
100 break;
101 default:
102 dev_err(&pdev->dev, "Unknown device type %d\n",
103 (unsigned int)type);
104 return -EINVAL;
105 }
106
107 ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
108 subdevs, n_subdevs, NULL, 0, NULL);
109 if (ret) {
110 dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
111 return ret;
112 }
113
114 return 0;
115}
116
117static struct platform_driver hi6421_pmic_driver = {
118 .driver = {
119 .name = "hi6421_pmic",
120 .of_match_table = of_hi6421_pmic_match,
121 },
122 .probe = hi6421_pmic_probe,
123};
124module_platform_driver(hi6421_pmic_driver);
125
126MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
127MODULE_DESCRIPTION("Hi6421 PMIC driver");
128MODULE_LICENSE("GPL v2");
1/*
2 * Device driver for Hi6421 IC
3 *
4 * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
5 * http://www.hisilicon.com
6 * Copyright (c) <2013-2014> Linaro Ltd.
7 * http://www.linaro.org
8 *
9 * Author: Guodong Xu <guodong.xu@linaro.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25#include <linux/device.h>
26#include <linux/err.h>
27#include <linux/mfd/core.h>
28#include <linux/module.h>
29#include <linux/of.h>
30#include <linux/platform_device.h>
31#include <linux/regmap.h>
32#include <linux/mfd/hi6421-pmic.h>
33
34static const struct mfd_cell hi6421_devs[] = {
35 { .name = "hi6421-regulator", },
36};
37
38static const struct regmap_config hi6421_regmap_config = {
39 .reg_bits = 32,
40 .reg_stride = 4,
41 .val_bits = 8,
42 .max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
43};
44
45static int hi6421_pmic_probe(struct platform_device *pdev)
46{
47 struct hi6421_pmic *pmic;
48 struct resource *res;
49 void __iomem *base;
50 int ret;
51
52 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
53 if (!pmic)
54 return -ENOMEM;
55
56 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
57 base = devm_ioremap_resource(&pdev->dev, res);
58 if (IS_ERR(base))
59 return PTR_ERR(base);
60
61 pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
62 &hi6421_regmap_config);
63 if (IS_ERR(pmic->regmap)) {
64 dev_err(&pdev->dev,
65 "regmap init failed: %ld\n", PTR_ERR(pmic->regmap));
66 return PTR_ERR(pmic->regmap);
67 }
68
69 /* set over-current protection debounce 8ms */
70 regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
71 (HI6421_OCP_DEB_SEL_MASK
72 | HI6421_OCP_EN_DEBOUNCE_MASK
73 | HI6421_OCP_AUTO_STOP_MASK),
74 (HI6421_OCP_DEB_SEL_8MS
75 | HI6421_OCP_EN_DEBOUNCE_ENABLE));
76
77 platform_set_drvdata(pdev, pmic);
78
79 ret = devm_mfd_add_devices(&pdev->dev, 0, hi6421_devs,
80 ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
81 if (ret) {
82 dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret);
83 return ret;
84 }
85
86 return 0;
87}
88
89static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
90 { .compatible = "hisilicon,hi6421-pmic", },
91 { },
92};
93MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl);
94
95static struct platform_driver hi6421_pmic_driver = {
96 .driver = {
97 .name = "hi6421_pmic",
98 .of_match_table = of_hi6421_pmic_match_tbl,
99 },
100 .probe = hi6421_pmic_probe,
101};
102module_platform_driver(hi6421_pmic_driver);
103
104MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
105MODULE_DESCRIPTION("Hi6421 PMIC driver");
106MODULE_LICENSE("GPL v2");