mc13892: driver added

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

4 files changed, 123 insertions, 0 deletions

diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index aeae450848..e02824e24e 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -7,4 +7,7 @@ config DRIVER_I2C_IMX
 	bool "i.MX I2C Master driver"
 	depends on ARCH_IMX
 
+config DRIVER_I2C_MC13892
+	bool "MC13892 a.k.a. PMIC driver"
+
 endif
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index bf16153baa..2fa50fad14 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -1,3 +1,5 @@
 obj-$(CONFIG_I2C) += i2c.o
 
 obj-$(CONFIG_DRIVER_I2C_IMX) += i2c-imx.o
+
+obj-$(CONFIG_DRIVER_I2C_MC13892) += mc13892.o
diff --git a/drivers/i2c/mc13892.c b/drivers/i2c/mc13892.c
new file mode 100644
index 0000000000..54661d4f5e
--- /dev/null
+++ b/drivers/i2c/mc13892.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2007 Sascha Hauer, Pengutronix
+ *               2009 Marc Kleine-Budde <mkl@pengutronix.de>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <xfuncs.h>
+#include <errno.h>
+
+#include <i2c/i2c.h>
+
+#include <asm/byteorder.h>
+
+#define DRIVERNAME		"mc13892"
+
+struct mc_priv {
+	struct cdev		cdev;
+	struct i2c_client	*client;
+};
+
+#define to_mc_priv(a)		container_of(a, struct mc_priv, cdev)
+
+static struct mc_priv *mc_dev;
+
+struct i2c_client *mc13892_get_client(void)
+{
+	if (!mc_dev)
+		return NULL;
+
+	return mc_dev->client;
+}
+
+static u32 mc_read_reg(struct mc_priv *mc, int reg)
+{
+	u32 buf;
+
+	i2c_read_reg(mc->client, reg, (u8 *)&buf, sizeof(buf));
+
+	return buf;
+}
+
+static ssize_t mc_read(struct cdev *cdev, void *_buf, size_t count, ulong offset, ulong flags)
+{
+	struct mc_priv *priv = to_mc_priv(cdev);
+	int i = count >> 2;
+	u32 *buf = _buf;
+
+	offset >>= 2;
+
+	while (i) {
+		*buf = mc_read_reg(priv, offset);
+		buf++;
+		i--;
+		offset++;
+	}
+
+	return count;
+}
+
+static struct file_operations mc_fops = {
+	.lseek	= dev_lseek_default,
+	.read	= mc_read,
+};
+
+static int mc_probe(struct device_d *dev)
+{
+	if (mc_dev)
+		return -EBUSY;
+
+	mc_dev = xzalloc(sizeof(struct mc_priv));
+	mc_dev->cdev.name = DRIVERNAME;
+	mc_dev->client = to_i2c_client(dev);
+	mc_dev->cdev.size = 256;
+	mc_dev->cdev.dev = dev;
+	mc_dev->cdev.ops = &mc_fops;
+
+	devfs_create(&mc_dev->cdev);
+
+	return 0;
+}
+
+static struct driver_d mc_driver = {
+	.name  = DRIVERNAME,
+	.probe = mc_probe,
+};
+
+static int mc_init(void)
+{
+        register_driver(&mc_driver);
+        return 0;
+}
+
+device_initcall(mc_init);
diff --git a/include/i2c/mc13892.h b/include/i2c/mc13892.h
new file mode 100644
index 0000000000..2f44f6c853
--- /dev/null
+++ b/include/i2c/mc13892.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_ARCH_MC13892_H
+#define __ASM_ARCH_MC13892_H
+
+extern struct i2c_client *mc13892_get_client(void);
+
+#endif /* __ASM_ARCH_MC13892_H */
+