From 710bb1af85cf4012713fb0e86d3e1b9049f466d5 Mon Sep 17 00:00:00 2001
From: Marco Chiappero <marco@absence.it>
Date: Sat, 19 May 2012 22:35:55 +0900
Subject: [PATCH] --- yaml --- r: 310159 b: refs/heads/master c:
 88bf170646c3673877f4449127c2940c0bc307ca h: refs/heads/master i:   310157:
 816f39b5e8a9305b894ee7c1841094da16f358ad   310155:
 45d8ef1679491dda28d2b4321f645b2a31ebe13a   310151:
 8853a4b9f19134f35275a377de1304350f44423e   310143:
 fa6aa7d8bb44a341b707b69e4100944adba88a9f v: v3

---
 [refs]                                   |  2 +-
 trunk/drivers/platform/x86/sony-laptop.c | 86 ++++++++++++++++++++++++
 2 files changed, 87 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index d29d7dd0ea5c..aae1f07e4216 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 54535d083f0ae6ee51a43a7a3e17e3ca89774937
+refs/heads/master: 88bf170646c3673877f4449127c2940c0bc307ca
diff --git a/trunk/drivers/platform/x86/sony-laptop.c b/trunk/drivers/platform/x86/sony-laptop.c
index bc7f40bcd9cc..fcbedc972021 100644
--- a/trunk/drivers/platform/x86/sony-laptop.c
+++ b/trunk/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)
 {