drivers/mfd/rt5025-misc.c

   1 /*
   2  *  drivers/mfd/rt5025-misc.c
   3  *  Driver foo Richtek RT5025 PMIC Misc Part
   4  *
   5  *  Copyright (C) 2013 Richtek Electronics
   6  *  cy_huang <cy_huang@richtek.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/err.h>
  16 #include <linux/i2c.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/slab.h>
  19
  20 #include <linux/mfd/rt5025.h>
  21 #include <linux/mfd/rt5025-misc.h>
  22
  23 struct rt5025_misc_info {
  24         struct i2c_client *i2c;
  25 };
  26
  27 static struct i2c_client *g_shdn;
  28 void rt5025_power_off(void)
  29 {
  30         rt5025_set_bits(g_shdn, RT5025_SHDNCTRL_REG, RT5025_SHDNCTRL_MASK);
  31 }
  32 EXPORT_SYMBOL(rt5025_power_off);
  33
  34 static int __devinit rt5025_misc_reg_init(struct i2c_client *client, struct rt5025_misc_data *md)
  35 {
  36         int ret = 0;
  37
  38         rt5025_reg_write(client, RT5025_RESETCTRL_REG, md->RSTCtrl.val);
  39         rt5025_assign_bits(client, RT5025_VSYSULVO_REG, RT5025_VSYSOFF_MASK, md->VSYSCtrl.val);
  40         rt5025_reg_write(client, RT5025_PWRONCTRL_REG, md->PwrOnCfg.val);
  41         rt5025_reg_write(client, RT5025_SHDNCTRL_REG, md->SHDNCtrl.val);
  42         rt5025_reg_write(client, RT5025_PWROFFEN_REG, md->PwrOffCond.val);
  43
  44         return ret;
  45 }
  46
  47 static int __devinit rt5025_misc_probe(struct platform_device *pdev)
  48 {
  49         struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
  50         struct rt5025_platform_data *pdata = chip->dev->platform_data;
  51         struct rt5025_misc_info *mi;
  52
  53         mi = kzalloc(sizeof(*mi), GFP_KERNEL);
  54         if (!mi)
  55                 return -ENOMEM;
  56
  57         mi->i2c = chip->i2c;
  58         rt5025_misc_reg_init(mi->i2c, pdata->misc_data);
  59
  60         //for shutdown control
  61         g_shdn = chip->i2c;
  62
  63         platform_set_drvdata(pdev, mi);
  64         return 0;
  65 }
  66
  67 static int __devexit rt5025_misc_remove(struct platform_device *pdev)
  68 {
  69         struct rt5025_misc_info *mi = platform_get_drvdata(pdev);
  70
  71         kfree(mi);
  72         platform_set_drvdata(pdev, NULL);
  73         return 0;
  74 }
  75
  76 static struct platform_driver rt5025_misc_driver =
  77 {
  78         .driver = {
  79                 .name = RT5025_DEVICE_NAME "-misc",
  80                 .owner = THIS_MODULE,
  81         },
  82         .probe = rt5025_misc_probe,
  83         .remove = __devexit_p(rt5025_misc_remove),
  84 };
  85
  86 static int __init rt5025_misc_init(void)
  87 {
  88         return platform_driver_register(&rt5025_misc_driver);
  89 }
  90 subsys_initcall_sync(rt5025_misc_init);
  91
  92 static void __exit rt5025_misc_exit(void)
  93 {
  94         platform_driver_unregister(&rt5025_misc_driver);
  95 }
  96 module_exit(rt5025_misc_exit);
  97
  98 MODULE_LICENSE("GPL v2");
  99 MODULE_AUTHOR("CY Huang <cy_huang@richtek.com");
 100 MODULE_DESCRIPTION("Misc driver for RT5025");
 101 MODULE_ALIAS("platform:" RT5025_DEVICE_NAME "-misc");