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Commit 0dcef77c authored by Henrique de Moraes Holschuh's avatar Henrique de Moraes Holschuh Committed by Len Brown
Browse files

ACPI: thinkpad-acpi: improve thinkpad detection 



Improve the detection of ThinkPads, so as to reduce the chances of false
positives.

Since this could potentially add false negatives on the very old models,
add a module parameter to force the detection of a thinkpad.

Signed-off-by: default avatarHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent a5763f22

Documentation/thinkpad-acpi.txt

+7 −0
Original line number Diff line number Diff line
@@ -716,3 +716,10 @@ to enable more than one output class, just add their values. 


There is also a kernel build option to enable more debugging

information, which may be necessary to debug driver problems.



Force loading of module

-----------------------



If thinkpad-acpi refuses to detect your ThinkPad, you can try to specify

the module parameter force_load=1.  Regardless of whether this works or

not, please contact ibm-acpi-devel@lists.sourceforge.net with a report.

drivers/misc/thinkpad_acpi.c

+13 −0
Original line number Diff line number Diff line
@@ -2881,6 +2881,16 @@ static int __init probe_for_thinkpad(void) 
		return -ENODEV;

	}



	/*

	 * Risks a regression on very old machines, but reduces potential

	 * false positives a damn great deal

	 */

	if (!is_thinkpad)

		is_thinkpad = dmi_name_in_vendors("IBM");



	if (!is_thinkpad && !force_load)

		return -ENODEV;



	return 0;

}
@@ -2986,6 +2996,9 @@ module_param(experimental, int, 0); 
static u32 dbg_level;

module_param_named(debug, dbg_level, uint, 0);



static int force_load;

module_param(force_load, int, 0);



#define IBM_PARAM(feature) \

	module_param_call(feature, set_ibm_param, NULL, NULL, 0)

drivers/misc/thinkpad_acpi.h

+1 −0
Original line number Diff line number Diff line
@@ -128,6 +128,7 @@ static char *next_cmd(char **cmds); 
/* Module */

static int experimental;

static u32 dbg_level;

static int force_load;

static char *ibm_thinkpad_ec_found;



static char* check_dmi_for_ec(void);