From: Marco Chiappero <marco@xxxxxxxxxx>
Allows limiting the maximum battery charge level to a selectable value
(100%, 80% and 50%).
[malattia@xxxxxxxx: 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@xxxxxxxxxx>
Signed-off-by: Mattia Dongili <malattia@xxxxxxxx>
---
drivers/platform/x86/sony-laptop.c | 178 ++++++++++++++++++++++++++++++++++++
1 file changed, 178 insertions(+)
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 89e5cf9..0ac186e9 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -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)
{
--
1.7.10
--
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