1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Device driver for regulators in HISI PMIC IC
4  *
5  * Copyright (c) 2013 Linaro Ltd.
6  * Copyright (c) 2011 Hisilicon.
7  * Copyright (c) 2020-2021 Huawei Technologies Co., Ltd.
8  */
9 
10 #include <linux/mfd/core.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/regmap.h>
14 #include <linux/slab.h>
15 #include <linux/spmi.h>
16 
17 static const struct mfd_cell hi6421v600_devs[] = {
18 	{ .name = "hi6421v600-irq", },
19 	{ .name = "hi6421v600-regulator", },
20 };
21 
22 static const struct regmap_config regmap_config = {
23 	.reg_bits	= 16,
24 	.val_bits	= BITS_PER_BYTE,
25 	.max_register	= 0xffff,
26 	.fast_io	= true
27 };
28 
29 static int hi6421_spmi_pmic_probe(struct spmi_device *sdev)
30 {
31 	struct device *dev = &sdev->dev;
32 	struct regmap *regmap;
33 	int ret;
34 
35 	regmap = devm_regmap_init_spmi_ext(sdev, &regmap_config);
36 	if (IS_ERR(regmap))
37 		return PTR_ERR(regmap);
38 
39 	dev_set_drvdata(&sdev->dev, regmap);
40 
41 	ret = devm_mfd_add_devices(&sdev->dev, PLATFORM_DEVID_NONE,
42 				   hi6421v600_devs, ARRAY_SIZE(hi6421v600_devs),
43 				   NULL, 0, NULL);
44 	if (ret < 0)
45 		dev_err(dev, "Failed to add child devices: %d\n", ret);
46 
47 	return ret;
48 }
49 
50 static const struct of_device_id pmic_spmi_id_table[] = {
51 	{ .compatible = "hisilicon,hi6421-spmi" },
52 	{ }
53 };
54 MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
55 
56 static struct spmi_driver hi6421_spmi_pmic_driver = {
57 	.driver = {
58 		.name	= "hi6421-spmi-pmic",
59 		.of_match_table = pmic_spmi_id_table,
60 	},
61 	.probe	= hi6421_spmi_pmic_probe,
62 };
63 module_spmi_driver(hi6421_spmi_pmic_driver);
64 
65 MODULE_DESCRIPTION("HiSilicon Hi6421v600 SPMI PMIC driver");
66 MODULE_LICENSE("GPL v2");
67