提交 967145a0 编写于 作者: M Marco Chiappero 提交者: Matthew Garrett

sony-laptop: support battery care functions

Allows limiting the maximum battery charge level to a selectable value
(100%, 80% and 50%).

[malattia@linux.it: group function specific variables in a struct, use
kstrtoul. Allow 0 to 100 values into sysfs files rounding to the actual
limit.]
Signed-off-by: NMarco Chiappero <marco@absence.it>
Signed-off-by: NMattia Dongili <malattia@linux.it>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
上级 ae188715
......@@ -144,6 +144,10 @@ static void sony_nc_kbd_backlight_resume(void);
static void sony_nc_kbd_backlight_setup(struct platform_device *pd);
static int sony_nc_kbd_backlight_cleanup(struct platform_device *pd);
static int sony_nc_battery_care_setup(struct platform_device *pd,
unsigned int handle);
static void sony_nc_battery_care_cleanup(struct platform_device *pd);
enum sony_nc_rfkill {
SONY_WIFI,
SONY_BLUETOOTH,
......@@ -1270,6 +1274,14 @@ static void sony_nc_function_setup(struct acpi_device *device,
/* setup hotkeys */
sony_call_snc_handle(handle, 0x100, &result);
break;
case 0x0115:
case 0x0136:
case 0x013f:
result = sony_nc_battery_care_setup(pf_device, handle);
if (result)
pr_err("couldn't set up battery care function (%d)\n",
result);
break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_setup(device);
......@@ -1306,6 +1318,11 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
continue;
switch (handle) {
case 0x0115:
case 0x0136:
case 0x013f:
sony_nc_battery_care_cleanup(pd);
break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_cleanup();
......@@ -1745,6 +1762,167 @@ static void sony_nc_kbd_backlight_resume(void)
&ignore);
}
struct battery_care_control {
struct device_attribute attrs[2];
unsigned int handle;
};
static struct battery_care_control *bcare_ctl;
static ssize_t sony_nc_battery_care_limit_store(struct device *dev,
struct device_attribute *attr,
const char *buffer, size_t count)
{
unsigned int result, cmd;
unsigned long value;
if (count > 31)
return -EINVAL;
if (kstrtoul(buffer, 10, &value))
return -EINVAL;
/* limit values (2 bits):
* 00 - none
* 01 - 80%
* 10 - 50%
* 11 - 100%
*
* bit 0: 0 disable BCL, 1 enable BCL
* bit 1: 1 tell to store the battery limit (see bits 6,7) too
* bits 2,3: reserved
* bits 4,5: store the limit into the EC
* bits 6,7: store the limit into the battery
*/
/*
* 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;
else if (value <= 50)
cmd = 0x21;
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))
return -EIO;
return count;
}
static ssize_t sony_nc_battery_care_limit_show(struct device *dev,
struct device_attribute *attr, char *buffer)
{
unsigned int result, status;
if (sony_call_snc_handle(bcare_ctl->handle, 0x0000, &result))
return -EIO;
status = (result & 0x01) ? ((result & 0x30) >> 0x04) : 0;
switch (status) {
case 1:
status = 80;
break;
case 2:
status = 50;
break;
case 3:
status = 100;
break;
default:
status = 0;
break;
}
return snprintf(buffer, PAGE_SIZE, "%d\n", status);
}
static ssize_t sony_nc_battery_care_health_show(struct device *dev,
struct device_attribute *attr, char *buffer)
{
ssize_t count = 0;
unsigned int health;
if (sony_call_snc_handle(bcare_ctl->handle, 0x0200, &health))
return -EIO;
count = snprintf(buffer, PAGE_SIZE, "%d\n", health & 0xff);
return count;
}
static int sony_nc_battery_care_setup(struct platform_device *pd,
unsigned int handle)
{
int ret = 0;
bcare_ctl = kzalloc(sizeof(struct battery_care_control), GFP_KERNEL);
if (!bcare_ctl)
return -ENOMEM;
bcare_ctl->handle = handle;
sysfs_attr_init(&bcare_ctl->attrs[0].attr);
bcare_ctl->attrs[0].attr.name = "battery_care_limiter";
bcare_ctl->attrs[0].attr.mode = S_IRUGO | S_IWUSR;
bcare_ctl->attrs[0].show = sony_nc_battery_care_limit_show;
bcare_ctl->attrs[0].store = sony_nc_battery_care_limit_store;
ret = device_create_file(&pd->dev, &bcare_ctl->attrs[0]);
if (ret)
goto outkzalloc;
/* 0x0115 is for models with no health reporting capability */
if (handle == 0x0115)
return 0;
sysfs_attr_init(&bcare_ctl->attrs[1].attr);
bcare_ctl->attrs[1].attr.name = "battery_care_health";
bcare_ctl->attrs[1].attr.mode = S_IRUGO;
bcare_ctl->attrs[1].show = sony_nc_battery_care_health_show;
ret = device_create_file(&pd->dev, &bcare_ctl->attrs[1]);
if (ret)
goto outlimiter;
return 0;
outlimiter:
device_remove_file(&pd->dev, &bcare_ctl->attrs[0]);
outkzalloc:
kfree(bcare_ctl);
bcare_ctl = NULL;
return ret;
}
static void sony_nc_battery_care_cleanup(struct platform_device *pd)
{
if (bcare_ctl) {
device_remove_file(&pd->dev, &bcare_ctl->attrs[0]);
if (bcare_ctl->handle != 0x0115)
device_remove_file(&pd->dev, &bcare_ctl->attrs[1]);
kfree(bcare_ctl);
bcare_ctl = NULL;
}
}
static void sony_nc_backlight_ng_read_limits(int handle,
struct sony_backlight_props *props)
{
......
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