Eric Lee / smarc-fsl-linux-kernel

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drivers/mfd/mc13xxx-i2c.c 2.76 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  /*
   * Copyright 2009-2010 Creative Product Design
   * Marc Reilly marc@cpdesign.com.au
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License version 2 as published by the
   * Free Software Foundation.
   */
  
  #include <linux/slab.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/mfd/core.h>
  #include <linux/mfd/mc13xxx.h>
  #include <linux/of.h>
  #include <linux/of_device.h>
  #include <linux/of_gpio.h>
  #include <linux/i2c.h>
  #include <linux/err.h>
  
  #include "mc13xxx.h"
  
  static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
  	{
  		.name = "mc13892",
  		.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
  	}, {
  		.name = "mc34708",
  		.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
  	}, {
  		/* sentinel */
  	}
  };
  MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
  
  static const struct of_device_id mc13xxx_dt_ids[] = {
  	{
  		.compatible = "fsl,mc13892",
  		.data = &mc13xxx_variant_mc13892,
  	}, {
  		.compatible = "fsl,mc34708",
  		.data = &mc13xxx_variant_mc34708,
  	}, {
  		/* sentinel */
  	}
  };
  MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
  
  static const struct regmap_config mc13xxx_regmap_i2c_config = {
  	.reg_bits = 8,
  	.val_bits = 24,
  
  	.max_register = MC13XXX_NUMREGS,
  
  	.cache_type = REGCACHE_NONE,
  };
  
  static int mc13xxx_i2c_probe(struct i2c_client *client,
  		const struct i2c_device_id *id)
  {
  	struct mc13xxx *mc13xxx;
  	int ret;
  
  	mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
  	if (!mc13xxx)
  		return -ENOMEM;
  
  	dev_set_drvdata(&client->dev, mc13xxx);
  
  	mc13xxx->irq = client->irq;
  
  	mc13xxx->regmap = devm_regmap_init_i2c(client,
  					       &mc13xxx_regmap_i2c_config);
  	if (IS_ERR(mc13xxx->regmap)) {
  		ret = PTR_ERR(mc13xxx->regmap);
  		dev_err(&client->dev, "Failed to initialize regmap: %d
  ", ret);
  		return ret;
  	}
  
  	if (client->dev.of_node) {
  		const struct of_device_id *of_id =
  			of_match_device(mc13xxx_dt_ids, &client->dev);
  		mc13xxx->variant = of_id->data;
  	} else {
  		mc13xxx->variant = (void *)id->driver_data;
  	}
  
  	return mc13xxx_common_init(&client->dev);
  }
  
  static int mc13xxx_i2c_remove(struct i2c_client *client)
  {
  	return mc13xxx_common_exit(&client->dev);
  }
  
  static struct i2c_driver mc13xxx_i2c_driver = {
  	.id_table = mc13xxx_i2c_device_id,
  	.driver = {
  		.name = "mc13xxx",
  		.of_match_table = mc13xxx_dt_ids,
  	},
  	.probe = mc13xxx_i2c_probe,
  	.remove = mc13xxx_i2c_remove,
  };
  
  static int __init mc13xxx_i2c_init(void)
  {
  	return i2c_add_driver(&mc13xxx_i2c_driver);
  }
  subsys_initcall(mc13xxx_i2c_init);
  
  static void __exit mc13xxx_i2c_exit(void)
  {
  	i2c_del_driver(&mc13xxx_i2c_driver);
  }
  module_exit(mc13xxx_i2c_exit);
  
  MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
  MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
  MODULE_LICENSE("GPL v2");