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/mfd/hi6421-spmi-pmic.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/regmap.h>
15 #include <linux/slab.h>
16 #include <linux/spmi.h>
17 
18 static const struct mfd_cell hi6421v600_devs[] = {
19 	{ .name = "hi6421v600-irq", },
20 	{ .name = "hi6421v600-regulator", },
21 };
22 
23 static const struct regmap_config regmap_config = {
24 	.reg_bits	= 16,
25 	.val_bits	= BITS_PER_BYTE,
26 	.max_register	= 0xffff,
27 	.fast_io	= true
28 };
29 
30 static int hi6421_spmi_pmic_probe(struct spmi_device *sdev)
31 {
32 	struct device *dev = &sdev->dev;
33 	int ret;
34 	struct hi6421_spmi_pmic *ddata;
35 	ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
36 	if (!ddata)
37 		return -ENOMEM;
38 
39 	ddata->regmap = devm_regmap_init_spmi_ext(sdev, &regmap_config);
40 	if (IS_ERR(ddata->regmap))
41 		return PTR_ERR(ddata->regmap);
42 
43 	ddata->dev = dev;
44 
45 	dev_set_drvdata(&sdev->dev, ddata);
46 
47 	ret = devm_mfd_add_devices(&sdev->dev, PLATFORM_DEVID_NONE,
48 				   hi6421v600_devs, ARRAY_SIZE(hi6421v600_devs),
49 				   NULL, 0, NULL);
50 	if (ret < 0)
51 		dev_err(dev, "Failed to add child devices: %d\n", ret);
52 
53 	return ret;
54 }
55 
56 static const struct of_device_id pmic_spmi_id_table[] = {
57 	{ .compatible = "hisilicon,hi6421-spmi" },
58 	{ }
59 };
60 MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
61 
62 static struct spmi_driver hi6421_spmi_pmic_driver = {
63 	.driver = {
64 		.name	= "hi6421-spmi-pmic",
65 		.of_match_table = pmic_spmi_id_table,
66 	},
67 	.probe	= hi6421_spmi_pmic_probe,
68 };
69 module_spmi_driver(hi6421_spmi_pmic_driver);
70 
71 MODULE_DESCRIPTION("HiSilicon Hi6421v600 SPMI PMIC driver");
72 MODULE_LICENSE("GPL v2");
73