From: wayne <wayne.lin@xxxxxxxxxxxx>
---
drivers/hwmon/Kconfig | 8 ++
drivers/hwmon/Makefile | 1 +
drivers/hwmon/wpce775x.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++
include/linux/wpce775x.h | 30 ++++++++
4 files changed, 205 insertions(+), 0 deletions(-)
create mode 100755 drivers/hwmon/wpce775x.c
create mode 100755 include/linux/wpce775x.h
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 83a283e..d652272 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1061,4 +1061,12 @@ config SENSORS_ISL29011
help
ISL29011 Light Sensor Driver implemented by Quanta.
+config SENSORS_WPCE775X
+ tristate "Winbond WPCE775X"
+ depends on I2C
+ default n
+ help
+ This driver provides support for the Winbond WPCE775XX Embedded
+ Controller, which provides lcd backlight, LEDs, and Battery control.
+
endif # HWMON
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 6237580..fb99aa8 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -94,6 +94,7 @@ obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o
obj-$(CONFIG_SENSORS_WM831X) += wm831x-hwmon.o
obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o
obj-$(CONFIG_SENSORS_ISL29011) += isl29011.o
+obj-$(CONFIG_SENSORS_WPCE775X) += wpce775x.o
ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y)
EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/hwmon/wpce775x.c b/drivers/hwmon/wpce775x.c
new file mode 100755
index 0000000..dc296ea
--- /dev/null
+++ b/drivers/hwmon/wpce775x.c
@@ -0,0 +1,166 @@
+/* Quanta EC driver for the Winbond Embedded Controller
+ *
+ * Copyright (C) 2009 Quanta Computer Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 <linux/module.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+
+#define EC_ID_NAME "qci-i2cec"
+#define EC_BUFFER_LEN 16
+#define EC_CMD_POWER_OFF 0xAC
+#define EC_CMD_RESTART 0xAB
+
+static struct i2c_client *g_i2cec_client;
+
+/* General structure to hold the driver data */
+struct i2cec_drv_data {
+ struct i2c_client *i2cec_client;
+ struct work_struct work;
+ char ec_data[EC_BUFFER_LEN+1];
+};
+
+static int __devinit wpce_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int __devexit wpce_remove(struct i2c_client *kbd);
+
+#ifdef CONFIG_PM
+static int wpce_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int wpce_resume(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static struct dev_pm_ops wpce_pm_ops = {
+ .suspend = wpce_suspend,
+ .resume = wpce_resume,
+};
+#endif
+
+static const struct i2c_device_id wpce_idtable[] = {
+ { EC_ID_NAME, 0 },
+ { }
+};
+
+static struct i2c_driver wpce_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = EC_ID_NAME,
+#ifdef CONFIG_PM
+ .pm = &wpce_pm_ops,
+#endif
+ },
+ .probe = wpce_probe,
+ .remove = __devexit_p(wpce_remove),
+ .id_table = wpce_idtable,
+};
+
+static int __devinit wpce_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int err = -ENOMEM;
+ struct i2cec_drv_data *context = 0;
+
+ /* there is no need to call i2c_check_functionality() since it is the
+ client's job to use the interface (I2C vs SMBUS) appropriate for it. */
+ client->driver = &wpce_driver;
+ context = kzalloc(sizeof(struct i2cec_drv_data), GFP_KERNEL);
+ if (!context)
+ return err;
+
+ context->i2cec_client = client;
+ g_i2cec_client = client;
+ i2c_set_clientdata(context->i2cec_client, context);
+
+ return 0;
+}
+
+static int __devexit wpce_remove(struct i2c_client *dev)
+{
+ struct i2cec_drv_data *context = i2c_get_clientdata(dev);
+ g_i2cec_client = NULL;
+ kfree(context);
+
+ return 0;
+}
+
+static int __init wpce_init(void)
+{
+ return i2c_add_driver(&wpce_driver);
+}
+
+static void __exit wpce_exit(void)
+{
+ i2c_del_driver(&wpce_driver);
+}
+
+struct i2c_client *wpce_get_i2c_client(void)
+{
+ return g_i2cec_client;
+}
+EXPORT_SYMBOL_GPL(wpce_get_i2c_client);
+
+void wpce_poweroff(void)
+{
+ if (g_i2cec_client == NULL)
+ return;
+ i2c_smbus_write_byte(g_i2cec_client, EC_CMD_POWER_OFF);
+}
+EXPORT_SYMBOL_GPL(wpce_poweroff);
+
+void wpce_restart(void)
+{
+ if (g_i2cec_client == NULL)
+ return;
+ i2c_smbus_write_byte(g_i2cec_client, EC_CMD_RESTART);
+}
+EXPORT_SYMBOL_GPL(wpce_restart);
+
+int wpce_i2c_transfer(struct i2c_msg *msg)
+{
+ if (g_i2cec_client == NULL)
+ return -1;
+ msg->addr = g_i2cec_client->addr;
+ return i2c_transfer(g_i2cec_client->adapter, msg, 1);
+}
+EXPORT_SYMBOL_GPL(wpce_i2c_transfer);
+
+int wpce_smbus_write_word_data(u8 command, u16 value)
+{
+ if (g_i2cec_client == NULL)
+ return -1;
+ return i2c_smbus_write_word_data(g_i2cec_client, command, value);
+}
+EXPORT_SYMBOL_GPL(wpce_smbus_write_word_data);
+
+int wpce_smbus_write_byte_data(u8 command, u8 value)
+{
+ if (g_i2cec_client == NULL)
+ return -1;
+ return i2c_smbus_write_byte_data(g_i2cec_client, command, value);
+}
+EXPORT_SYMBOL_GPL(wpce_smbus_write_byte_data);
+
+module_init(wpce_init);
+module_exit(wpce_exit);
+
+MODULE_AUTHOR("Quanta Computer Inc.");
+MODULE_DESCRIPTION("Quanta Embedded Controller I2C Bridge Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/wpce775x.h b/include/linux/wpce775x.h
new file mode 100755
index 0000000..1803122
--- /dev/null
+++ b/include/linux/wpce775x.h
@@ -0,0 +1,30 @@
+/* Quanta EC driver for the Winbond Embedded Controller
+ *
+ * Copyright (C) 2009 Quanta Computer Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#ifndef WPCE775X_DRV_H
+#define WPCE775X_DRV_H
+
+#include <linux/i2c.h>
+
+struct i2c_client *wpce_get_i2c_client(void);
+int wpce_smbus_write_word_data(u8 command, u16 value);
+struct i2c_client *wpce_get_i2c_client(void);
+void wpce_poweroff(void);
+void wpce_restart(void);
+int wpce_i2c_transfer(struct i2c_msg *msg);
+int wpce_smbus_write_word_data(u8 command, u16 value);
+int wpce_smbus_write_byte_data(u8 command, u8 value);
+
+#endif
--
1.7.0.4
--
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