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sony-laptop: store battery care limits on batteries

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Some models offer the option to store the limits on the battery
(firmware?).

Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Mattia Dongili 2012-06-11 07:18:31 +09:00 committed by Matthew Garrett
parent bb384b5295
commit 15aa5c7546
1 changed files with 21 additions and 20 deletions
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37
drivers/platform/x86/sony-laptop.c
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@ -1916,32 +1916,33 @@ static ssize_t sony_nc_battery_care_limit_store(struct device *dev,
* bits 4,5: store the limit into the EC
* bits 6,7: store the limit into the battery
*/
cmd = 0;
if (value > 0) {
if (value <= 50)
cmd = 0x20;
else if (value <= 80)
cmd = 0x10;
else if (value <= 100)
cmd = 0x30;
else
return -EINVAL;
/*
* handle 0x0115 should allow storing on battery too;
* handle 0x0136 same as 0x0115 + health status;
* handle 0x013f, same as 0x0136 but no storing on the battery
*
* Store only inside the EC for now, regardless the handle number
*/
if (value == 0)
/* disable limits */
cmd = 0x0;
if (bcare_ctl->handle != 0x013f)
cmd = cmd | (cmd << 2);
else if (value <= 50)
cmd = 0x21;
cmd = (cmd | 0x1) << 0x10;
}
else if (value <= 80)
cmd = 0x11;
else if (value <= 100)
cmd = 0x31;
else
return -EINVAL;
if (sony_call_snc_handle(bcare_ctl->handle, (cmd << 0x10) | 0x0100,
&result))
if (sony_call_snc_handle(bcare_ctl->handle, cmd | 0x0100, &result))
return -EIO;
return count;