diff options
Diffstat (limited to 'recipes/linux/linux/acern30/n30-batt.patch')
| -rw-r--r-- | recipes/linux/linux/acern30/n30-batt.patch | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/recipes/linux/linux/acern30/n30-batt.patch b/recipes/linux/linux/acern30/n30-batt.patch new file mode 100644 index 0000000000..e5eb9e7812 --- /dev/null +++ b/recipes/linux/linux/acern30/n30-batt.patch @@ -0,0 +1,242 @@ +A battery controller i2c driver for the n30. + +I don't use this driver any more, it was much nicer to use the ARM APM +emulation to expose this data. + +Index: linux-2.6.14/drivers/hwmon/Kconfig +=================================================================== +--- linux-2.6.14.orig/drivers/hwmon/Kconfig ++++ linux-2.6.14/drivers/hwmon/Kconfig +@@ -290,6 +290,16 @@ + This driver can also be built as a module. If so, the module + will be called max1619. + ++config SENSORS_N30_BATT ++ tristate "Acer N30 Battery Controller" ++ depends on HWMON && I2C && MACH_N30 ++ help ++ If you say yes here you get support for the battery controller ++ found inside the Acer N30 PDA. ++ ++ This driver can also be built as a module. If so, the module ++ will be called n30_batt. ++ + config SENSORS_PC87360 + tristate "National Semiconductor PC87360 family" + depends on HWMON && I2C && EXPERIMENTAL +Index: linux-2.6.14/drivers/hwmon/Makefile +=================================================================== +--- linux-2.6.14.orig/drivers/hwmon/Makefile ++++ linux-2.6.14/drivers/hwmon/Makefile +@@ -35,6 +35,7 @@ + obj-$(CONFIG_SENSORS_LM90) += lm90.o + obj-$(CONFIG_SENSORS_LM92) += lm92.o + obj-$(CONFIG_SENSORS_MAX1619) += max1619.o ++obj-$(CONFIG_SENSORS_N30_BATT) += n30_batt.o + obj-$(CONFIG_SENSORS_PC87360) += pc87360.o + obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o + obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o +Index: linux-2.6.14/drivers/hwmon/n30_batt.c +=================================================================== +--- linux-2.6.14.orig/drivers/hwmon/n30_batt.c ++++ linux-2.6.14/drivers/hwmon/n30_batt.c +@@ -0,0 +1,199 @@ ++/* ++ * n30_batt.c - Support for the Acer N30 Battery Controller ++ * Copyright (c) 2005 Christer Weinigel <christer@weinigel.se> ++ * ++ * 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 <linux/config.h> ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/slab.h> ++#include <linux/i2c.h> ++#include <linux/hwmon.h> ++#include <asm/mach-types.h> ++#include <asm/apm.h> ++ ++static unsigned short normal_i2c[] = { I2C_CLIENT_END, I2C_CLIENT_END }; ++static unsigned short probe[] = { I2C_CLIENT_END, I2C_CLIENT_END }; ++static unsigned short ignore[] = { I2C_CLIENT_END, I2C_CLIENT_END }; ++static unsigned short force[] = { -1, 0x0b, I2C_CLIENT_END, I2C_CLIENT_END }; ++static unsigned short *forces[] = { force, NULL }; ++ ++static struct i2c_client_address_data addr_data = { ++ .normal_i2c = normal_i2c, ++ .probe = probe, ++ .ignore = ignore, ++ .forces = forces, ++}; ++ ++struct n30_batt_data { ++ struct i2c_client client; ++ struct semaphore update_lock; ++ unsigned long last_updated; /* last update in jiffies */ ++ u8 charge; ++}; ++ ++static struct n30_batt_data *n30_batt_update_device(struct device *dev) ++{ ++ struct i2c_client *client = to_i2c_client(dev); ++ struct n30_batt_data *data = i2c_get_clientdata(client); ++ ++ down(&data->update_lock); ++ ++ if (time_after(jiffies, data->last_updated + 3 * HZ)) { ++ int value; ++ ++ value = i2c_smbus_read_byte(client); ++ ++ if (value == -1) ++ printk(KERN_WARNING "n30-batt: unable to read charge\n"); ++ else ++ data->charge = value; ++ data->last_updated = jiffies; ++ } ++ ++ up(&data->update_lock); ++ ++ return data; ++} ++ ++static ssize_t show_charge(struct device *dev, struct device_attribute *attr, char *buf) ++{ ++ struct n30_batt_data *data = n30_batt_update_device(dev); ++ return sprintf(buf, "%d\n", data->charge); ++} ++ ++static DEVICE_ATTR(charge, S_IRUGO, show_charge, NULL); ++ ++static struct i2c_driver n30_batt_driver; ++ ++static struct device *n30_batt_dev; ++ ++static int n30_batt_detect(struct i2c_adapter *adapter, int address, int kind) ++{ ++ struct i2c_client *new_client; ++ struct n30_batt_data *data; ++ int err = 0; ++ int value; ++ ++ printk(KERN_INFO "detect n30 Battery controller\n"); ++ ++ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) ++ goto exit; ++ ++ printk(KERN_INFO "kmalloc n30 Battery controller\n"); ++ ++ if (!(data = kmalloc(sizeof(struct n30_batt_data), GFP_KERNEL))) { ++ err = -ENOMEM; ++ goto exit; ++ } ++ memset(data, 0, sizeof(struct n30_batt_data)); ++ ++ new_client = &data->client; ++ i2c_set_clientdata(new_client, data); ++ new_client->addr = address; ++ new_client->adapter = adapter; ++ new_client->driver = &n30_batt_driver; ++ new_client->flags = 0; ++ strlcpy(new_client->name, "n30_batt", I2C_NAME_SIZE); ++ ++ if ((value = i2c_smbus_read_byte(new_client)) == -1) { ++ printk(KERN_ERR "n30_batt: unable to read charge value\n"); ++ err = -ENXIO; ++ goto exit_free; ++ } ++ ++ init_MUTEX(&data->update_lock); ++ data->charge = value; ++ data->last_updated = jiffies; ++ ++ printk(KERN_DEBUG "n30_batt: battery charge is %d%%\n", data->charge); ++ ++ if ((err = i2c_attach_client(new_client))) ++ goto exit_free; ++ ++ device_create_file(&new_client->dev, &dev_attr_charge); ++ ++ n30_batt_dev = &new_client->dev; ++ ++ return 0; ++ ++exit_free: ++ kfree(data); ++exit: ++ return err; ++} ++ ++static int n30_batt_attach_adapter(struct i2c_adapter *adapter) ++{ ++ printk(KERN_INFO "attaching n30 Battery controller\n"); ++ return i2c_probe(adapter, &addr_data, n30_batt_detect); ++} ++ ++static int n30_batt_detach_client(struct i2c_client *client) ++{ ++ n30_batt_dev = NULL; ++ i2c_detach_client(client); ++ kfree(i2c_get_clientdata(client)); ++ return 0; ++} ++ ++static struct i2c_driver n30_batt_driver = { ++ .owner = THIS_MODULE, ++ .name = "n30_batt", ++ .flags = I2C_DF_NOTIFY, ++ .attach_adapter = n30_batt_attach_adapter, ++ .detach_client = n30_batt_detach_client, ++}; ++ ++static void n30_get_power_status(struct apm_power_info *info) ++{ ++ if (n30_batt_dev) { ++ struct n30_batt_data *data = n30_batt_update_device(n30_batt_dev); ++ ++ info->ac_line_status = 0xff; ++ info->battery_status = 0xff; ++ info->battery_flag = 0xff; ++ info->battery_life = data->charge; ++ info->time = -1; ++ info->units = -1; ++ } ++} ++ ++static int __init sensors_n30_batt_init(void) ++{ ++ printk(KERN_INFO "n30 Battery controller\n"); ++ ++ if (!machine_is_n30()) ++ return -ENODEV; ++ printk(KERN_INFO "adding n30 Battery controller\n"); ++ ++ apm_get_power_status = n30_get_power_status; ++ ++ return i2c_add_driver(&n30_batt_driver); ++} ++ ++static void __exit sensors_n30_batt_exit(void) ++{ ++ i2c_del_driver(&n30_batt_driver); ++} ++ ++MODULE_AUTHOR("Christer Weinigel <christer@weinigel.se>"); ++MODULE_DESCRIPTION("Acer n30 Battery Controller"); ++MODULE_LICENSE("GPL"); ++ ++module_init(sensors_n30_batt_init); ++module_exit(sensors_n30_batt_exit); |