1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/mfd/da9052-i2c.c b/drivers/mfd/da9052-i2c.c
new file mode 100644
index 000000000000..44b97c70a61f
--- /dev/null
+++ b/drivers/mfd/da9052-i2c.c
@@ -0,0 +1,140 @@
+/*
+ * I2C access for 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/i2c.h>
+#include <linux/err.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+
+static int da9052_i2c_enable_multiwrite(struct da9052 *da9052)
+{
+        int reg_val, ret;
+
+        ret = regmap_read(da9052->regmap, DA9052_CONTROL_B_REG, &reg_val);
+        if (ret < 0)
+                return ret;
+
+        if (reg_val & DA9052_CONTROL_B_WRITEMODE) {
+                reg_val &= ~DA9052_CONTROL_B_WRITEMODE;
+                ret = regmap_write(da9052->regmap, DA9052_CONTROL_B_REG,
+                                   reg_val);
+                if (ret < 0)
+                        return ret;
+        }
+
+        return 0;
+}
+
+static int __devinit da9052_i2c_probe(struct i2c_client *client,
+                                       const struct i2c_device_id *id)
+{
+        struct da9052 *da9052;
+        int ret;
+
+        da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL);
+        if (!da9052)
+                return -ENOMEM;
+
+        if (!i2c_check_functionality(client->adapter,
+                                     I2C_FUNC_SMBUS_BYTE_DATA)) {
+                dev_info(&client->dev, "Error in %s:i2c_check_functionality\n",
+                         __func__);
+                ret = -ENODEV;
+                goto err;
+        }
+
+        da9052->dev = &client->dev;
+        da9052->chip_irq = client->irq;
+
+        i2c_set_clientdata(client, da9052);
+
+        da9052->regmap = regmap_init_i2c(client, &da9052_regmap_config);
+        if (IS_ERR(da9052->regmap)) {
+                ret = PTR_ERR(da9052->regmap);
+                dev_err(&client->dev, "Failed to allocate register map: %d\n",
+                        ret);
+                goto err;
+        }
+
+        ret = da9052_i2c_enable_multiwrite(da9052);
+        if (ret < 0)
+                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_i2c_remove(struct i2c_client *client)
+{
+        struct da9052 *da9052 = i2c_get_clientdata(client);
+
+        da9052_device_exit(da9052);
+        kfree(da9052);
+
+        return 0;
+}
+
+static struct i2c_device_id da9052_i2c_id[] = {
+        {"da9052", DA9052},
+        {"da9053-aa", DA9053_AA},
+        {"da9053-ba", DA9053_BA},
+        {"da9053-bb", DA9053_BB},
+        {}
+};
+
+static struct i2c_driver da9052_i2c_driver = {
+        .probe = da9052_i2c_probe,
+        .remove = da9052_i2c_remove,
+        .id_table = da9052_i2c_id,
+        .driver = {
+                .name = "da9052",
+                .owner = THIS_MODULE,
+        },
+};
+
+static int __init da9052_i2c_init(void)
+{
+        int ret;
+
+        ret = i2c_add_driver(&da9052_i2c_driver);
+        if (ret != 0) {
+                pr_err("DA9052 I2C registration failed %d\n", ret);
+                return ret;
+        }
+
+        return 0;
+}
+subsys_initcall(da9052_i2c_init);
+
+static void __exit da9052_i2c_exit(void)
+{
+        i2c_del_driver(&da9052_i2c_driver);
+}
+module_exit(da9052_i2c_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("I2C driver for Dialog DA9052 PMIC");
+MODULE_LICENSE("GPL");