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power_supply: bump EC version check that we refuse to run with in olpc_battery

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Refuse to run with an EC < 0x44.  We're playing it safe, and this is a pretty
old EC version.

Also, add a comment about why we're checking the EC version.

Signed-off-by: Andres Salomon <[email protected]>
Cc: David Woodhouse <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Anton Vorontsov <[email protected]>
This commit is contained in:
Andres Salomon 2008-05-02 13:41:59 -07:00 • committed by Anton Vorontsov
commit 484d6d50cc
1 changed files with 8 additions and 2 deletions
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10
drivers/power/olpc_battery.c
View file

@ -389,8 +389,14 @@ static int __init olpc_bat_init(void)
if (!olpc_platform_info.ecver)
return -ENXIO;
if (olpc_platform_info.ecver < 0x43) {
printk(KERN_NOTICE "OLPC EC version 0x%02x too old for battery driver.\n", olpc_platform_info.ecver);
/*
* We've seen a number of EC protocol changes; this driver requires
* the latest EC protocol, supported by 0x44 and above.
*/
if (olpc_platform_info.ecver < 0x44) {
printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
"battery driver.\n", olpc_platform_info.ecver);
return -ENXIO;
}