summaryrefslogtreecommitdiffstats
path: root/drivers/platform
diff options
context:
space:
mode:
authorMarco Chiappero <marco@absence.it>2012-05-19 22:35:55 +0900
committerMatthew Garrett <mjg@redhat.com>2012-05-31 14:34:42 -0400
commit88bf170646c3673877f4449127c2940c0bc307ca (patch)
treebc91a1040075947892faad50eb39bf292f84f73b /drivers/platform
parent54535d083f0ae6ee51a43a7a3e17e3ca89774937 (diff)
downloadlinux-88bf170646c3673877f4449127c2940c0bc307ca.tar.bz2
sony-laptop: add high speed battery charging function
Signed-off-by: Marco Chiappero <marco@absence.it> Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/sony-laptop.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index bc7f40bcd9cc..fcbedc972021 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -155,6 +155,9 @@ static void sony_nc_thermal_resume(void);
static int sony_nc_lid_resume_setup(struct platform_device *pd);
static void sony_nc_lid_resume_cleanup(struct platform_device *pd);
+static int sony_nc_highspeed_charging_setup(struct platform_device *pd);
+static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd);
+
enum sony_nc_rfkill {
SONY_WIFI,
SONY_BLUETOOTH,
@@ -1301,6 +1304,12 @@ static void sony_nc_function_setup(struct acpi_device *device,
pr_err("couldn't set up thermal profile function (%d)\n",
result);
break;
+ case 0x0131:
+ result = sony_nc_highspeed_charging_setup(pf_device);
+ if (result)
+ pr_err("couldn't set up high speed charging function (%d)\n",
+ result);
+ break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_setup(device);
@@ -1348,6 +1357,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
case 0x0122:
sony_nc_thermal_cleanup(pd);
break;
+ case 0x0131:
+ sony_nc_highspeed_charging_cleanup(pd);
+ break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_cleanup();
@@ -2246,6 +2258,80 @@ static void sony_nc_lid_resume_cleanup(struct platform_device *pd)
}
}
+/* High speed charging function */
+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 (kstrtoul(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)
+{
+ unsigned int result;
+
+ if (sony_call_snc_handle(0x0131, 0x0100, &result))
+ return -EIO;
+
+ return snprintf(buffer, PAGE_SIZE, "%d\n", result & 0x01);
+}
+
+static int sony_nc_highspeed_charging_setup(struct platform_device *pd)
+{
+ unsigned int result;
+
+ if (sony_call_snc_handle(0x0131, 0x0000, &result) || !(result & 0x01)) {
+ /* some models advertise the handle but have no implementation
+ * for it
+ */
+ 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;
+
+ result = device_create_file(&pd->dev, hsc_handle);
+ if (result) {
+ kfree(hsc_handle);
+ hsc_handle = NULL;
+ return result;
+ }
+
+ return 0;
+}
+
+static void 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;
+ }
+}
+
static void sony_nc_backlight_ng_read_limits(int handle,
struct sony_backlight_props *props)
{