1 files changed, 104 insertions, 0 deletions

diff --git a/drivers/mfd/ab8500-i2c.c b/drivers/mfd/ab8500-i2c.c
new file mode 100644
index 00000000000..9be541c6b00
--- /dev/null
+++ b/drivers/mfd/ab8500-i2c.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson.
+ * License Terms: GNU General Public License v2
+ * This file was based on drivers/mfd/ab8500-spi.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/ab8500.h>
+#include <linux/mfd/db8500-prcmu.h>
+
+static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data)
+{
+        int ret;
+
+        ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
+        if (ret < 0)
+                dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
+        return ret;
+}
+
+static int ab8500_i2c_read(struct ab8500 *ab8500, u16 addr)
+{
+        int ret;
+        u8 data;
+
+        ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
+        if (ret < 0) {
+                dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
+                return ret;
+        }
+        return (int)data;
+}
+
+static int __devinit ab8500_i2c_probe(struct platform_device *plf)
+{
+        struct ab8500 *ab8500;
+        struct resource *resource;
+        int ret;
+
+        ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL);
+        if (!ab8500)
+                return -ENOMEM;
+
+        ab8500->dev = &plf->dev;
+
+        resource = platform_get_resource(plf, IORESOURCE_IRQ, 0);
+        if (!resource) {
+                kfree(ab8500);
+                return -ENODEV;
+        }
+
+        ab8500->irq = resource->start;
+
+        ab8500->read = ab8500_i2c_read;
+        ab8500->write = ab8500_i2c_write;
+
+        platform_set_drvdata(plf, ab8500);
+
+        ret = ab8500_init(ab8500);
+        if (ret)
+                kfree(ab8500);
+
+        return ret;
+}
+
+static int __devexit ab8500_i2c_remove(struct platform_device *plf)
+{
+        struct ab8500 *ab8500 = platform_get_drvdata(plf);
+
+        ab8500_exit(ab8500);
+        kfree(ab8500);
+
+        return 0;
+}
+
+static struct platform_driver ab8500_i2c_driver = {
+        .driver = {
+                .name = "ab8500-i2c",
+                .owner = THIS_MODULE,
+        },
+        .probe  = ab8500_i2c_probe,
+        .remove = __devexit_p(ab8500_i2c_remove)
+};
+
+static int __init ab8500_i2c_init(void)
+{
+        return platform_driver_register(&ab8500_i2c_driver);
+}
+
+static void __exit ab8500_i2c_exit(void)
+{
+        platform_driver_unregister(&ab8500_i2c_driver);
+}
+arch_initcall(ab8500_i2c_init);
+module_exit(ab8500_i2c_exit);
+
+MODULE_AUTHOR("Mattias WALLIN <mattias.wallin@stericsson.com");
+MODULE_DESCRIPTION("AB8500 Core access via PRCMU I2C");
+MODULE_LICENSE("GPL v2");