1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright 2009-2010 Creative Product Design
  4 * Marc Reilly marc@cpdesign.com.au
  5 */
  6
  7#include <linux/slab.h>
  8#include <linux/module.h>
  9#include <linux/platform_device.h>
 10#include <linux/mfd/core.h>
 11#include <linux/mfd/mc13xxx.h>
 12#include <linux/of.h>
 13#include <linux/of_device.h>
 14#include <linux/of_gpio.h>
 15#include <linux/i2c.h>
 16#include <linux/err.h>
 17
 18#include "mc13xxx.h"
 19
 20static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
 21	{
 22		.name = "mc13892",
 23		.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
 24	}, {
 25		.name = "mc34708",
 26		.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
 27	}, {
 28		/* sentinel */
 29	}
 30};
 31MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
 32
 33static const struct of_device_id mc13xxx_dt_ids[] = {
 34	{
 35		.compatible = "fsl,mc13892",
 36		.data = &mc13xxx_variant_mc13892,
 37	}, {
 38		.compatible = "fsl,mc34708",
 39		.data = &mc13xxx_variant_mc34708,
 40	}, {
 41		/* sentinel */
 42	}
 43};
 44MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
 45
 46static const struct regmap_config mc13xxx_regmap_i2c_config = {
 47	.reg_bits = 8,
 48	.val_bits = 24,
 49
 50	.max_register = MC13XXX_NUMREGS,
 51
 52	.cache_type = REGCACHE_NONE,
 53};
 54
 55static int mc13xxx_i2c_probe(struct i2c_client *client,
 56		const struct i2c_device_id *id)
 57{
 58	struct mc13xxx *mc13xxx;
 59	int ret;
 60
 61	mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
 62	if (!mc13xxx)
 63		return -ENOMEM;
 64
 65	dev_set_drvdata(&client->dev, mc13xxx);
 66
 67	mc13xxx->irq = client->irq;
 68
 69	mc13xxx->regmap = devm_regmap_init_i2c(client,
 70					       &mc13xxx_regmap_i2c_config);
 71	if (IS_ERR(mc13xxx->regmap)) {
 72		ret = PTR_ERR(mc13xxx->regmap);
 73		dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret);
 74		return ret;
 75	}
 76
 77	if (client->dev.of_node) {
 78		const struct of_device_id *of_id =
 79			of_match_device(mc13xxx_dt_ids, &client->dev);
 80		mc13xxx->variant = of_id->data;
 81	} else {
 82		mc13xxx->variant = (void *)id->driver_data;
 83	}
 84
 85	return mc13xxx_common_init(&client->dev);
 86}
 87
 88static int mc13xxx_i2c_remove(struct i2c_client *client)
 89{
 90	return mc13xxx_common_exit(&client->dev);
 91}
 92
 93static struct i2c_driver mc13xxx_i2c_driver = {
 94	.id_table = mc13xxx_i2c_device_id,
 95	.driver = {
 96		.name = "mc13xxx",
 97		.of_match_table = mc13xxx_dt_ids,
 98	},
 99	.probe = mc13xxx_i2c_probe,
100	.remove = mc13xxx_i2c_remove,
101};
102
103static int __init mc13xxx_i2c_init(void)
104{
105	return i2c_add_driver(&mc13xxx_i2c_driver);
106}
107subsys_initcall(mc13xxx_i2c_init);
108
109static void __exit mc13xxx_i2c_exit(void)
110{
111	i2c_del_driver(&mc13xxx_i2c_driver);
112}
113module_exit(mc13xxx_i2c_exit);
114
115MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
116MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
117MODULE_LICENSE("GPL v2");