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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: Marco Chiappero <marco@absence.it> Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Marco Chiappero
Matthew Garrett
parent
ae188715ac
commit
967145a030
@ -144,6 +144,10 @@ static void sony_nc_kbd_backlight_resume(void);
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static void sony_nc_kbd_backlight_setup(struct platform_device *pd);
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static int sony_nc_kbd_backlight_cleanup(struct platform_device *pd);
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static int sony_nc_battery_care_setup(struct platform_device *pd,
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unsigned int handle);
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static void sony_nc_battery_care_cleanup(struct platform_device *pd);
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enum sony_nc_rfkill {
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SONY_WIFI,
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SONY_BLUETOOTH,
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@ -1270,6 +1274,14 @@ static void sony_nc_function_setup(struct acpi_device *device,
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/* setup hotkeys */
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sony_call_snc_handle(handle, 0x100, &result);
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break;
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case 0x0115:
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case 0x0136:
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case 0x013f:
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result = sony_nc_battery_care_setup(pf_device, handle);
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if (result)
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pr_err("couldn't set up battery care function (%d)\n",
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result);
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break;
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case 0x0124:
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case 0x0135:
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sony_nc_rfkill_setup(device);
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@ -1306,6 +1318,11 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
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continue;
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switch (handle) {
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case 0x0115:
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case 0x0136:
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case 0x013f:
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sony_nc_battery_care_cleanup(pd);
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break;
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case 0x0124:
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case 0x0135:
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sony_nc_rfkill_cleanup();
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@ -1745,6 +1762,167 @@ static void sony_nc_kbd_backlight_resume(void)
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&ignore);
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}
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struct battery_care_control {
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struct device_attribute attrs[2];
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unsigned int handle;
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};
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static struct battery_care_control *bcare_ctl;
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static ssize_t sony_nc_battery_care_limit_store(struct device *dev,
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struct device_attribute *attr,
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const char *buffer, size_t count)
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{
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unsigned int result, cmd;
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unsigned long value;
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if (count > 31)
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return -EINVAL;
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if (kstrtoul(buffer, 10, &value))
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return -EINVAL;
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/* limit values (2 bits):
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* 00 - none
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* 01 - 80%
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* 10 - 50%
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* 11 - 100%
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*
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* bit 0: 0 disable BCL, 1 enable BCL
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* bit 1: 1 tell to store the battery limit (see bits 6,7) too
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* bits 2,3: reserved
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* bits 4,5: store the limit into the EC
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* bits 6,7: store the limit into the battery
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*/
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/*
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* handle 0x0115 should allow storing on battery too;
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* handle 0x0136 same as 0x0115 + health status;
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* handle 0x013f, same as 0x0136 but no storing on the battery
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*
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* Store only inside the EC for now, regardless the handle number
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*/
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if (value == 0)
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/* disable limits */
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cmd = 0x0;
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else if (value <= 50)
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cmd = 0x21;
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else if (value <= 80)
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cmd = 0x11;
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else if (value <= 100)
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cmd = 0x31;
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else
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return -EINVAL;
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if (sony_call_snc_handle(bcare_ctl->handle, (cmd << 0x10) | 0x0100,
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&result))
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return -EIO;
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return count;
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}
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static ssize_t sony_nc_battery_care_limit_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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unsigned int result, status;
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if (sony_call_snc_handle(bcare_ctl->handle, 0x0000, &result))
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return -EIO;
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status = (result & 0x01) ? ((result & 0x30) >> 0x04) : 0;
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switch (status) {
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case 1:
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status = 80;
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break;
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case 2:
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status = 50;
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break;
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case 3:
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status = 100;
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break;
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default:
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status = 0;
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break;
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}
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return snprintf(buffer, PAGE_SIZE, "%d\n", status);
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}
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static ssize_t sony_nc_battery_care_health_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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ssize_t count = 0;
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unsigned int health;
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if (sony_call_snc_handle(bcare_ctl->handle, 0x0200, &health))
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return -EIO;
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count = snprintf(buffer, PAGE_SIZE, "%d\n", health & 0xff);
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return count;
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}
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static int sony_nc_battery_care_setup(struct platform_device *pd,
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unsigned int handle)
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{
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int ret = 0;
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bcare_ctl = kzalloc(sizeof(struct battery_care_control), GFP_KERNEL);
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if (!bcare_ctl)
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return -ENOMEM;
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bcare_ctl->handle = handle;
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sysfs_attr_init(&bcare_ctl->attrs[0].attr);
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bcare_ctl->attrs[0].attr.name = "battery_care_limiter";
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bcare_ctl->attrs[0].attr.mode = S_IRUGO | S_IWUSR;
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bcare_ctl->attrs[0].show = sony_nc_battery_care_limit_show;
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bcare_ctl->attrs[0].store = sony_nc_battery_care_limit_store;
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ret = device_create_file(&pd->dev, &bcare_ctl->attrs[0]);
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if (ret)
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goto outkzalloc;
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/* 0x0115 is for models with no health reporting capability */
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if (handle == 0x0115)
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return 0;
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sysfs_attr_init(&bcare_ctl->attrs[1].attr);
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bcare_ctl->attrs[1].attr.name = "battery_care_health";
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bcare_ctl->attrs[1].attr.mode = S_IRUGO;
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bcare_ctl->attrs[1].show = sony_nc_battery_care_health_show;
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ret = device_create_file(&pd->dev, &bcare_ctl->attrs[1]);
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if (ret)
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goto outlimiter;
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return 0;
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outlimiter:
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device_remove_file(&pd->dev, &bcare_ctl->attrs[0]);
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outkzalloc:
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kfree(bcare_ctl);
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bcare_ctl = NULL;
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return ret;
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}
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static void sony_nc_battery_care_cleanup(struct platform_device *pd)
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{
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if (bcare_ctl) {
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device_remove_file(&pd->dev, &bcare_ctl->attrs[0]);
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if (bcare_ctl->handle != 0x0115)
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device_remove_file(&pd->dev, &bcare_ctl->attrs[1]);
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kfree(bcare_ctl);
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bcare_ctl = NULL;
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}
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}
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static void sony_nc_backlight_ng_read_limits(int handle,
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struct sony_backlight_props *props)
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{
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