Signed-off-by: Beniamino Galvani <b.galvani@xxxxxxxxx>
---
drivers/mfd/Kconfig | 4 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/act8846.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++++
include/mfd/act8846.h | 56 ++++++++++++++++++
4 files changed, 215 insertions(+)
create mode 100644 drivers/mfd/act8846.c
create mode 100644 include/mfd/act8846.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 8873764..3af904d 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1,5 +1,9 @@
menu MFD
+config MFD_ACT8846
+ depends on I2C
+ bool "ACT8846 driver"
+
config MFD_LP3972
depends on I2C
bool "LP3972 driver"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 2ad766d..49b9e35 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_MFD_ACT8846) += act8846.o
obj-$(CONFIG_MFD_LP3972) += lp3972.o
obj-$(CONFIG_MFD_MC13XXX) += mc13xxx.o
obj-$(CONFIG_MFD_MC34704) += mc34704.o
diff --git a/drivers/mfd/act8846.c b/drivers/mfd/act8846.c
new file mode 100644
index 0000000..60029ac
--- /dev/null
+++ b/drivers/mfd/act8846.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2007 Sascha Hauer, Pengutronix
+ * 2009 Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
+ *
+ * Copied from drivers/mfd/mc9sdz60.c
+ *
+ * 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.
+ *
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <xfuncs.h>
+#include <errno.h>
+
+#include <i2c/i2c.h>
+#include <mfd/act8846.h>
+
+#define DRIVERNAME "act8846"
+
+#define to_act8846(a) container_of(a, struct act8846, cdev)
+
+static struct act8846 *act8846_dev;
+
+struct act8846 *act8846_get(void)
+{
+ if (!act8846_dev)
+ return NULL;
+
+ return act8846_dev;
+}
+EXPORT_SYMBOL(act8846_get);
+
+int act8846_reg_read(struct act8846 *act8846, enum act8846_reg reg, u8 *val)
+{
+ int ret;
+
+ ret = i2c_read_reg(act8846->client, reg, val, 1);
+
+ return ret == 1 ? 0 : ret;
+}
+EXPORT_SYMBOL(act8846_reg_read);
+
+int act8846_reg_write(struct act8846 *act8846, enum act8846_reg reg, u8 val)
+{
+ int ret;
+
+ ret = i2c_write_reg(act8846->client, reg, &val, 1);
+
+ return ret == 1 ? 0 : ret;
+}
+EXPORT_SYMBOL(act8846_reg_write);
+
+int act8846_set_bits(struct act8846 *act8846, enum act8846_reg reg,
+ u8 mask, u8 val)
+{
+ u8 tmp;
+ int err;
+
+ err = act8846_reg_read(act8846, reg, &tmp);
+ tmp = (tmp & ~mask) | val;
+
+ if (!err)
+ err = act8846_reg_write(act8846, reg, tmp);
+
+ return err;
+}
+EXPORT_SYMBOL(act8846_set_bits);
+
+static ssize_t act8846_read(struct cdev *cdev, void *_buf, size_t count,
+ loff_t offset, ulong flags)
+{
+ struct act8846 *act8846 = to_act8846(cdev);
+ u8 *buf = _buf;
+ size_t i = count;
+ int err;
+
+ while (i) {
+ err = act8846_reg_read(act8846, offset, buf);
+ if (err)
+ return (ssize_t)err;
+ buf++;
+ i--;
+ offset++;
+ }
+
+ return count;
+}
+
+static ssize_t act8846_write(struct cdev *cdev, const void *_buf, size_t count,
+ loff_t offset, ulong flags)
+{
+ struct act8846 *act8846 = to_act8846(cdev);
+ const u8 *buf = _buf;
+ size_t i = count;
+ int err;
+
+ while (i) {
+ err = act8846_reg_write(act8846, offset, *buf);
+ if (err)
+ return (ssize_t)err;
+ buf++;
+ i--;
+ offset++;
+ }
+
+ return count;
+}
+
+static struct file_operations act8846_fops = {
+ .lseek = dev_lseek_default,
+ .read = act8846_read,
+ .write = act8846_write,
+};
+
+static int act8846_probe(struct device_d *dev)
+{
+ if (act8846_dev)
+ return -EBUSY;
+
+ act8846_dev = xzalloc(sizeof(struct act8846));
+ act8846_dev->cdev.name = DRIVERNAME;
+ act8846_dev->client = to_i2c_client(dev);
+ act8846_dev->cdev.size = 64;
+ act8846_dev->cdev.dev = dev;
+ act8846_dev->cdev.ops = &act8846_fops;
+
+ devfs_create(&act8846_dev->cdev);
+
+ return 0;
+}
+
+static struct driver_d act8846_driver = {
+ .name = DRIVERNAME,
+ .probe = act8846_probe,
+};
+
+static int act8846_init(void)
+{
+ i2c_driver_register(&act8846_driver);
+ return 0;
+}
+
+device_initcall(act8846_init);
diff --git a/include/mfd/act8846.h b/include/mfd/act8846.h
new file mode 100644
index 0000000..011fe20
--- /dev/null
+++ b/include/mfd/act8846.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2009 Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
+ *
+ * This file is released under the GPLv2
+ *
+ * Derived from mc9sdz60.h
+ */
+
+#ifndef _ACT8846_H
+#define _ACT8846_H
+
+enum act8846_reg {
+ ACT8846_SYS_MODE = 0x00,
+ ACT8846_SYS_CTRL = 0x01,
+ ACT8846_DCDC1_VSET1 = 0x10,
+ ACT8846_DCDC1_CTRL = 0x12,
+ ACT8846_DCDC2_VSET1 = 0x20,
+ ACT8846_DCDC2_VSET2 = 0x21,
+ ACT8846_DCDC2_CTRL = 0x22,
+ ACT8846_DCDC3_VSET1 = 0x30,
+ ACT8846_DCDC3_VSET2 = 0x31,
+ ACT8846_DCDC3_CTRL = 0x32,
+ ACT8846_DCDC4_VSET1 = 0x40,
+ ACT8846_DCDC4_VSET2 = 0x41,
+ ACT8846_DCDC4_CTRL = 0x42,
+ ACT8846_LDO5_VSET = 0x50,
+ ACT8846_LDO5_CTRL = 0x51,
+ ACT8846_LDO6_VSET = 0x58,
+ ACT8846_LDO6_CTRL = 0x59,
+ ACT8846_LDO7_VSET = 0x60,
+ ACT8846_LDO7_CTRL = 0x61,
+ ACT8846_LDO8_VSET = 0x68,
+ ACT8846_LDO8_CTRL = 0x69,
+ ACT8846_LDO9_VSET = 0x70,
+ ACT8846_LDO9_CTRL = 0x71,
+ ACT8846_LDO10_VSET = 0x80,
+ ACT8846_LDO10_CTRL = 0x81,
+ ACT8846_LDO11_VSET = 0x90,
+ ACT8846_LDO11_CTRL = 0x91,
+ ACT8846_LDO12_VSET = 0xA0,
+ ACT8846_LDO12_CTRL = 0xA1,
+};
+
+struct act8846 {
+ struct cdev cdev;
+ struct i2c_client *client;
+};
+
+struct act8846 *act8846_get(void);
+
+int act8846_reg_read(struct act8846 *priv, enum act8846_reg reg, u8 *val);
+int act8846_reg_write(struct act8846 *priv, enum act8846_reg reg, u8 val);
+int act8846_set_bits(struct act8846 *priv, enum act8846_reg reg,
+ u8 mask, u8 val);
+
+#endif /* _ACT8846_H */
--
1.7.10.4
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