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authorMarc Reilly <marc@cpdesign.com.au>2012-04-01 16:41:39 +1000
committerSamuel Ortiz <sameo@linux.intel.com>2012-05-01 12:35:41 +0200
commitdf3df6469fd1e59284d6b5d4dd9dbe1bd7861040 (patch)
tree1864a53128e4ec8488118d49171ae6818442b963 /drivers/mfd/mc13xxx-i2c.c
parenta0c7c1d48ea9f53c67c79eda498bb8eda1422748 (diff)
mfd: Add mc13xxx i2c driver
Adds support for mc13xxx family ICs connected via i2c. Signed-off-by: Marc Reilly <marc@cpdesign.com.au> Acked-by: Oskar Schirmer <oskar@scara.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/mc13xxx-i2c.c')
-rw-r--r--drivers/mfd/mc13xxx-i2c.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/mfd/mc13xxx-i2c.c b/drivers/mfd/mc13xxx-i2c.c
new file mode 100644
index 000000000000..d22501dad6a6
--- /dev/null
+++ b/drivers/mfd/mc13xxx-i2c.c
@@ -0,0 +1,128 @@
+/*
+ * 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/mutex.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 = MC13XXX_ID_MC13892,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
+
+static const struct of_device_id mc13xxx_dt_ids[] = {
+ {
+ .compatible = "fsl,mc13892",
+ .data = (void *) &mc13xxx_i2c_device_id[0],
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
+
+static 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)
+{
+ const struct of_device_id *of_id;
+ struct i2c_driver *idrv = to_i2c_driver(client->dev.driver);
+ struct mc13xxx *mc13xxx;
+ struct mc13xxx_platform_data *pdata = dev_get_platdata(&client->dev);
+ int ret;
+
+ of_id = of_match_device(mc13xxx_dt_ids, &client->dev);
+ if (of_id)
+ idrv->id_table = (const struct i2c_device_id*) of_id->data;
+
+ mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
+ if (!mc13xxx)
+ return -ENOMEM;
+
+ dev_set_drvdata(&client->dev, mc13xxx);
+
+ mc13xxx->dev = &client->dev;
+ mutex_init(&mc13xxx->lock);
+
+ mc13xxx->regmap = regmap_init_i2c(client, &mc13xxx_regmap_i2c_config);
+ if (IS_ERR(mc13xxx->regmap)) {
+ ret = PTR_ERR(mc13xxx->regmap);
+ dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
+ ret);
+ dev_set_drvdata(&client->dev, NULL);
+ kfree(mc13xxx);
+ return ret;
+ }
+
+ ret = mc13xxx_common_init(mc13xxx, pdata, client->irq);
+
+ if (ret == 0 && (id->driver_data != mc13xxx->ictype))
+ dev_warn(mc13xxx->dev,
+ "device id doesn't match auto detection!\n");
+
+ return ret;
+}
+
+static int __devexit mc13xxx_i2c_remove(struct i2c_client *client)
+{
+ struct mc13xxx *mc13xxx = dev_get_drvdata(&client->dev);
+
+ mc13xxx_common_cleanup(mc13xxx);
+
+ return 0;
+}
+
+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 = __devexit_p(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");