Vaio TT models allow to enable the HighSpeed Charging feature, this
patch adds a control file. Feature discovered and tested by Javier Achirica
Signed-off-by: Marco Chiappero <marco@xxxxxxxxxx>
---
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -2342,6 +2342,79 @@ static int sony_nc_lid_resume_cleanup(st
return 0;
}
+static struct device_attribute *hsc_handle;
+
+static ssize_t sony_nc_highspeed_charging_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buffer, size_t count)
+{
+ unsigned int result;
+ unsigned long value;
+
+ if (count > 31)
+ return -EINVAL;
+ if (strict_strtoul(buffer, 10, &value) || value > 1)
+ return -EINVAL;
+
+ if (sony_call_snc_handle(0x0131, value << 0x10 | 0x0200, &result))
+ return -EIO;
+
+ return count;
+}
+
+static ssize_t sony_nc_highspeed_charging_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count = 0;
+ unsigned int result;
+
+ if (sony_call_snc_handle(0x0131, 0x0100, &result))
+ return -EIO;
+
+ count = snprintf(buffer, PAGE_SIZE, "%d\n", result & 0x01);
+
+ return count;
+}
+
+static int sony_nc_highspeed_charging_setup(struct platform_device *pd)
+{
+ unsigned int result;
+
+ if (sony_call_snc_handle(0x0131, 0x0000, &result) || !(result & 0x01)) {
+ pr_info("no High Speed Charging capability found\n");
+ return 0;
+ }
+
+ hsc_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
+ if (!hsc_handle)
+ return -ENOMEM;
+
+ sysfs_attr_init(&hsc_handle->attr);
+ hsc_handle->attr.name = "battery_highspeed_charging";
+ hsc_handle->attr.mode = S_IRUGO | S_IWUSR;
+ hsc_handle->show = sony_nc_highspeed_charging_show;
+ hsc_handle->store = sony_nc_highspeed_charging_store;
+
+ if (device_create_file(&pd->dev, hsc_handle)) {
+ kfree(hsc_handle);
+ hsc_handle = NULL;
+ return -1;
+ }
+
+ return 0;
+}
+
+static int sony_nc_highspeed_charging_cleanup(struct platform_device *pd)
+{
+ if (hsc_handle) {
+ device_remove_file(&pd->dev, hsc_handle);
+ kfree(hsc_handle);
+ hsc_handle = NULL;
+ }
+
+ return 0;
+}
+
static void sony_nc_backlight_ng_read_limits(int handle,
struct sony_backlight_props *props)
@@ -2495,6 +2568,9 @@ static void sony_nc_snc_setup_handles(st
sony_kbd_handle = handle;
ret = sony_nc_kbd_backlight_setup(pd);
break;
+ case 0x0131:
+ ret = sony_nc_highspeed_charging_setup(pd);
+ break;
case 0x0134:
case 0x0147:
sony_gs_handle = handle;
@@ -2547,6 +2623,9 @@ static void sony_nc_snc_cleanup_handles(
case 0x0143:
sony_nc_kbd_backlight_cleanup(pd);
break;
+ case 0x0131:
+ sony_nc_highspeed_charging_cleanup(pd);
+ break;
case 0x0134:
case 0x0147:
sony_nc_gsensor_cleanup(pd);
--
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