Eric Lee / smarc-fsl-linux-kernel

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drivers/mfd/da9052-spi.c 2.43 KB
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cfe04478f   Ashish Jangam   MFD: DA9052/53 MF... 
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  /*
   * SPI access for Dialog DA9052 PMICs.
   *
   * Copyright(c) 2011 Dialog Semiconductor Ltd.
   *
   * Author: David Dajun Chen <dchen@diasemi.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   */
  
  #include <linux/device.h>
  #include <linux/module.h>
  #include <linux/input.h>
  #include <linux/mfd/core.h>
  #include <linux/spi/spi.h>
  #include <linux/err.h>
  
  #include <linux/mfd/da9052/da9052.h>
  
  static int da9052_spi_probe(struct spi_device *spi)
  {
  	int ret;
  	const struct spi_device_id *id = spi_get_device_id(spi);
  	struct da9052 *da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL);
  
  	if (!da9052)
  		return -ENOMEM;
  
  	spi->mode = SPI_MODE_0 | SPI_CPOL;
  	spi->bits_per_word = 8;
  	spi_setup(spi);
  
  	da9052->dev = &spi->dev;
  	da9052->chip_irq = spi->irq;
  
  	dev_set_drvdata(&spi->dev, da9052);
  
  	da9052_regmap_config.read_flag_mask = 1;
  	da9052_regmap_config.write_flag_mask = 0;
  
  	da9052->regmap = regmap_init_spi(spi, &da9052_regmap_config);
  	if (IS_ERR(da9052->regmap)) {
  		ret = PTR_ERR(da9052->regmap);
  		dev_err(&spi->dev, "Failed to allocate register map: %d
  ",
  			ret);
  		goto err;
  	}
  
  	ret = da9052_device_init(da9052, id->driver_data);
  	if (ret != 0)
  		goto err;
  
  	return 0;
  
  err:
  	kfree(da9052);
  	return ret;
  }
  
  static int da9052_spi_remove(struct spi_device *spi)
  {
  	struct da9052 *da9052 = dev_get_drvdata(&spi->dev);
  
  	da9052_device_exit(da9052);
  	kfree(da9052);
  
  	return 0;
  }
  
  static struct spi_device_id da9052_spi_id[] = {
  	{"da9052", DA9052},
  	{"da9053-aa", DA9053_AA},
  	{"da9053-ba", DA9053_BA},
  	{"da9053-bb", DA9053_BB},
  	{}
  };
  
  static struct spi_driver da9052_spi_driver = {
  	.probe = da9052_spi_probe,
  	.remove = __devexit_p(da9052_spi_remove),
  	.id_table = da9052_spi_id,
  	.driver = {
  		.name = "da9052",
  		.bus = &spi_bus_type,
  		.owner = THIS_MODULE,
  	},
  };
  
  static int __init da9052_spi_init(void)
  {
  	int ret;
  
  	ret = spi_register_driver(&da9052_spi_driver);
  	if (ret != 0) {
  		pr_err("Failed to register DA9052 SPI driver, %d
  ", ret);
  		return ret;
  	}
  
  	return 0;
  }
  subsys_initcall(da9052_spi_init);
  
  static void __exit da9052_spi_exit(void)
  {
  	spi_unregister_driver(&da9052_spi_driver);
  }
  module_exit(da9052_spi_exit);
  
  MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
  MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
  MODULE_LICENSE("GPL");