diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/misc/eeepc-laptop.c | 147 |
2 files changed, 148 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 01b7deba91e..7a4869a9db8 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -356,6 +356,7 @@ config EEEPC_LAPTOP depends on X86 depends on ACPI depends on BACKLIGHT_CLASS_DEVICE + depends on HWMON depends on EXPERIMENTAL ---help--- This driver supports the Fn-Fx keys on Eee PC laptops. diff --git a/drivers/misc/eeepc-laptop.c b/drivers/misc/eeepc-laptop.c index 2b59b7ed4b1..6d727609097 100644 --- a/drivers/misc/eeepc-laptop.c +++ b/drivers/misc/eeepc-laptop.c @@ -23,6 +23,8 @@ #include <linux/platform_device.h> #include <linux/backlight.h> #include <linux/fb.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> #include <acpi/acpi_drivers.h> #include <acpi/acpi_bus.h> #include <linux/uaccess.h> @@ -103,6 +105,15 @@ const char *cm_setv[] = { "CRDS", NULL }; +#define EEEPC_EC "\\_SB.PCI0.SBRG.EC0." + +#define EEEPC_EC_FAN_PWM EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */ +#define EEEPC_EC_SC02 0x63 +#define EEEPC_EC_FAN_HRPM EEEPC_EC "SC05" /* High byte, fan speed (RPM) */ +#define EEEPC_EC_FAN_LRPM EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */ +#define EEEPC_EC_FAN_CTRL EEEPC_EC "SFB3" /* Byte containing SF25 */ +#define EEEPC_EC_SFB3 0xD3 + /* * This is the main structure, we can use it to store useful information * about the hotk device @@ -154,6 +165,9 @@ static struct acpi_driver eeepc_hotk_driver = { /* The backlight device /sys/class/backlight */ static struct backlight_device *eeepc_backlight_device; +/* The hwmon device */ +static struct device *eeepc_hwmon_device; + /* * The backlight class declaration */ @@ -429,6 +443,100 @@ static int eeepc_hotk_remove(struct acpi_device *device, int type) } /* + * Hwmon + */ +static int eeepc_get_fan_pwm(void) +{ + int value = 0; + + read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value); + return (value); +} + +static void eeepc_set_fan_pwm(int value) +{ + value = SENSORS_LIMIT(value, 0, 100); + ec_write(EEEPC_EC_SC02, value); +} + +static int eeepc_get_fan_rpm(void) +{ + int high = 0; + int low = 0; + + read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high); + read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low); + return (high << 8 | low); +} + +static int eeepc_get_fan_ctrl(void) +{ + int value = 0; + + read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value); + return ((value & 0x02 ? 1 : 0)); +} + +static void eeepc_set_fan_ctrl(int manual) +{ + int value = 0; + + read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value); + if (manual) + value |= 0x02; + else + value &= ~0x02; + ec_write(EEEPC_EC_SFB3, value); +} + +static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) +{ + int rv, value; + + rv = parse_arg(buf, count, &value); + if (rv > 0) + set(value); + return rv; +} + +static ssize_t show_sys_hwmon(int (*get)(void), char *buf) +{ + return sprintf(buf, "%d\n", get()); +} + +#define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \ + static ssize_t show_##_name(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ + { \ + return show_sys_hwmon(_set, buf); \ + } \ + static ssize_t store_##_name(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ + { \ + return store_sys_hwmon(_get, buf, count); \ + } \ + static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0); + +EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL); +EEEPC_CREATE_SENSOR_ATTR(fan1_pwm, S_IRUGO | S_IWUSR, + eeepc_get_fan_pwm, eeepc_set_fan_pwm); +EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, + eeepc_get_fan_ctrl, eeepc_set_fan_ctrl); + +static struct attribute *hwmon_attributes[] = { + &sensor_dev_attr_fan1_pwm.dev_attr.attr, + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_pwm1_enable.dev_attr.attr, + NULL +}; + +static struct attribute_group hwmon_attribute_group = { + .attrs = hwmon_attributes +}; + +/* * exit/init */ static void eeepc_backlight_exit(void) @@ -438,9 +546,23 @@ static void eeepc_backlight_exit(void) eeepc_backlight_device = NULL; } +static void eeepc_hwmon_exit(void) +{ + struct device *hwmon; + + hwmon = eeepc_hwmon_device; + if (!hwmon) + return ; + hwmon_device_unregister(hwmon); + sysfs_remove_group(&hwmon->kobj, + &hwmon_attribute_group); + eeepc_hwmon_device = NULL; +} + static void __exit eeepc_laptop_exit(void) { eeepc_backlight_exit(); + eeepc_hwmon_exit(); acpi_bus_unregister_driver(&eeepc_hotk_driver); sysfs_remove_group(&platform_device->dev.kobj, &platform_attribute_group); @@ -468,6 +590,26 @@ static int eeepc_backlight_init(struct device *dev) return 0; } +static int eeepc_hwmon_init(struct device *dev) +{ + struct device *hwmon; + int result; + + hwmon = hwmon_device_register(dev); + if (IS_ERR(hwmon)) { + printk(EEEPC_ERR + "Could not register eeepc hwmon device\n"); + eeepc_hwmon_device = NULL; + return PTR_ERR(hwmon); + } + eeepc_hwmon_device = hwmon; + result = sysfs_create_group(&hwmon->kobj, + &hwmon_attribute_group); + if (result) + eeepc_hwmon_exit(); + return result; +} + static int __init eeepc_laptop_init(void) { struct device *dev; @@ -486,6 +628,9 @@ static int __init eeepc_laptop_init(void) result = eeepc_backlight_init(dev); if (result) goto fail_backlight; + result = eeepc_hwmon_init(dev); + if (result) + goto fail_hwmon; /* Register platform stuff */ result = platform_driver_register(&platform_driver); if (result) @@ -510,6 +655,8 @@ fail_platform_device2: fail_platform_device1: platform_driver_unregister(&platform_driver); fail_platform_driver: + eeepc_hwmon_exit(); +fail_hwmon: eeepc_backlight_exit(); fail_backlight: return result; |