Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / mc13xxx-i2c.c

diff --git a/kernel/drivers/mfd/mc13xxx-i2c.c b/kernel/drivers/mfd/mc13xxx-i2c.c
new file mode 100644 (file)
index 0000000..68b8448
--- /dev/null
+++ b/kernel/drivers/mfd/mc13xxx-i2c.c
@@ -0,0 +1,121 @@
+/*
+ * 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\n", 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 = {
+               .owner = THIS_MODULE,
+               .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");