diff options
| -rw-r--r-- | drivers/char/i8k.c | 49 |
1 files changed, 42 insertions, 7 deletions
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c index 3dc1a724ecc2..6a6c085efa69 100644 --- a/drivers/char/i8k.c +++ b/drivers/char/i8k.c @@ -65,6 +65,8 @@ static char bios_version[4]; static struct device *i8k_hwmon_dev; static u32 i8k_hwmon_flags; static int i8k_fan_mult; +static int i8k_pwm_mult; +static int i8k_fan_max = I8K_FAN_HIGH; #define I8K_HWMON_HAVE_TEMP1 (1 << 0) #define I8K_HWMON_HAVE_TEMP2 (1 << 1) @@ -97,6 +99,10 @@ static int fan_mult = I8K_FAN_MULT; module_param(fan_mult, int, 0); MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with"); +static int fan_max = I8K_FAN_HIGH; +module_param(fan_max, int, 0); +MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed"); + static int i8k_open_fs(struct inode *inode, struct file *file); static long i8k_ioctl(struct file *, unsigned int, unsigned long); @@ -274,7 +280,7 @@ static int i8k_set_fan(int fan, int speed) { struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; - speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); + speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); regs.ebx = (fan & 0xff) | (speed << 8); return i8k_smm(®s) ? : i8k_get_fan_status(fan); @@ -519,7 +525,7 @@ static ssize_t i8k_hwmon_show_pwm(struct device *dev, status = i8k_get_fan_status(index); if (status < 0) return -EIO; - return sprintf(buf, "%d\n", clamp_val(status * 128, 0, 255)); + return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); } static ssize_t i8k_hwmon_set_pwm(struct device *dev, @@ -533,7 +539,7 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev, err = kstrtoul(buf, 10, &val); if (err) return err; - val = clamp_val(DIV_ROUND_CLOSEST(val, 128), 0, 2); + val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); mutex_lock(&i8k_mutex); err = i8k_set_fan(index, val); @@ -636,6 +642,27 @@ static int __init i8k_init_hwmon(void) return 0; } +struct i8k_config_data { + int fan_mult; + int fan_max; +}; + +enum i8k_configs { + DELL_STUDIO, + DELL_XPS_M140, +}; + +static const struct i8k_config_data i8k_config_data[] = { + [DELL_STUDIO] = { + .fan_mult = 1, + .fan_max = I8K_FAN_HIGH, + }, + [DELL_XPS_M140] = { + .fan_mult = 1, + .fan_max = I8K_FAN_HIGH, + }, +}; + static struct dmi_system_id i8k_dmi_table[] __initdata = { { .ident = "Dell Inspiron", @@ -706,7 +733,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), }, - .driver_data = (void *)1, /* fan multiplier override */ + .driver_data = (void *)&i8k_config_data[DELL_STUDIO], }, { .ident = "Dell XPS M140", @@ -714,7 +741,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), }, - .driver_data = (void *)1, /* fan multiplier override */ + .driver_data = (void *)&i8k_config_data[DELL_XPS_M140], }, { } }; @@ -754,9 +781,17 @@ static int __init i8k_probe(void) } i8k_fan_mult = fan_mult; + i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ id = dmi_first_match(i8k_dmi_table); - if (id && fan_mult == I8K_FAN_MULT && id->driver_data) - i8k_fan_mult = (unsigned long)id->driver_data; + if (id && id->driver_data) { + const struct i8k_config_data *conf = id->driver_data; + + if (fan_mult == I8K_FAN_MULT && conf->fan_mult) + i8k_fan_mult = conf->fan_mult; + if (fan_max == I8K_FAN_HIGH && conf->fan_max) + i8k_fan_max = conf->fan_max; + } + i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); return 0; } |