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Commit 4ed99a27 authored by Jochen Eisinger's avatar Jochen Eisinger Committed by Linus Torvalds
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i8k: make fan multiplier tunable with a module parameter 



The i8k driver multiplies the fan speed reported by the BIOS with a factor of
30.  On my Dell Latitude D800, this factor is not required.

I'd suggest to make this configurable.

Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent af8e2a4c

drivers/char/i8k.c

+5 −1
Original line number Diff line number Diff line
@@ -77,6 +77,10 @@ static int power_status; 
module_param(power_status, bool, 0600);

MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k");



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 i8k_open_fs(struct inode *inode, struct file *file);

static int i8k_ioctl(struct inode *, struct file *, unsigned int,

		     unsigned long);
@@ -239,7 +243,7 @@ static int i8k_get_fan_speed(int fan) 
	struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, };



	regs.ebx = fan & 0xff;

	return i8k_smm(&regs) ? : (regs.eax & 0xffff) * I8K_FAN_MULT;

	return i8k_smm(&regs) ? : (regs.eax & 0xffff) * fan_mult;

}



/*