Merge branches 'acpi-cppc', 'acpi-misc', 'acpi-battery' and 'acpi-ac'

* acpi-cppc:
  mailbox: PCC: erroneous error message when parsing ACPI PCCT
  ACPI / CPPC: Fix invalid PCC channel status errors
  ACPI / CPPC: Document CPPC sysfs interface
  cpufreq / CPPC: Support for CPPC v3
  ACPI / CPPC: Check for valid PCC subspace only if PCC is used
  ACPI / CPPC: Add support for CPPC v3

* acpi-misc:
  ACPI: Add missing prototype_for arch_post_acpi_subsys_init()
  ACPI: add missing newline to printk

* acpi-battery:
  ACPI / battery: Add quirk to avoid checking for PMIC with native driver
  ACPI / battery: Ignore AC state in handle_discharging on systems where it is broken
  ACPI / battery: Add handling for devices which wrongly report discharging state
  ACPI / battery: Remove initializer for unused ident dmi_system_id
  ACPI / AC: Remove initializer for unused ident dmi_system_id

* acpi-ac:
  ACPI / AC: Add quirk to avoid checking for PMIC with native driver

Documentation/acpi/cppc_sysfs.txt

@@ -0,0 +1,69 @@
+
+	Collaborative Processor Performance Control (CPPC)
+
+CPPC defined in the ACPI spec describes a mechanism for the OS to manage the
+performance of a logical processor on a contigious and abstract performance
+scale. CPPC exposes a set of registers to describe abstract performance scale,
+to request performance levels and to measure per-cpu delivered performance.
+
+For more details on CPPC please refer to the ACPI specification at:
+
+http://uefi.org/specifications
+
+Some of the CPPC registers are exposed via sysfs under:
+
+/sys/devices/system/cpu/cpuX/acpi_cppc/
+
+for each cpu X
+
+--------------------------------------------------------------------------------
+
+$ ls -lR  /sys/devices/system/cpu/cpu0/acpi_cppc/
+/sys/devices/system/cpu/cpu0/acpi_cppc/:
+total 0
+-r--r--r-- 1 root root 65536 Mar  5 19:38 feedback_ctrs
+-r--r--r-- 1 root root 65536 Mar  5 19:38 highest_perf
+-r--r--r-- 1 root root 65536 Mar  5 19:38 lowest_freq
+-r--r--r-- 1 root root 65536 Mar  5 19:38 lowest_nonlinear_perf
+-r--r--r-- 1 root root 65536 Mar  5 19:38 lowest_perf
+-r--r--r-- 1 root root 65536 Mar  5 19:38 nominal_freq
+-r--r--r-- 1 root root 65536 Mar  5 19:38 nominal_perf
+-r--r--r-- 1 root root 65536 Mar  5 19:38 reference_perf
+-r--r--r-- 1 root root 65536 Mar  5 19:38 wraparound_time
+
+--------------------------------------------------------------------------------
+
+* highest_perf : Highest performance of this processor (abstract scale).
+* nominal_perf : Highest sustained performance of this processor (abstract scale).
+* lowest_nonlinear_perf : Lowest performance of this processor with nonlinear
+  power savings (abstract scale).
+* lowest_perf : Lowest performance of this processor (abstract scale).
+
+* lowest_freq : CPU frequency corresponding to lowest_perf (in MHz).
+* nominal_freq : CPU frequency corresponding to nominal_perf (in MHz).
+  The above frequencies should only be used to report processor performance in
+  freqency instead of abstract scale. These values should not be used for any
+  functional decisions.
+
+* feedback_ctrs : Includes both Reference and delivered performance counter.
+  Reference counter ticks up proportional to processor's reference performance.
+  Delivered counter ticks up proportional to processor's delivered performance.
+* wraparound_time: Minimum time for the feedback counters to wraparound (seconds).
+* reference_perf : Performance level at which reference performance counter
+  accumulates (abstract scale).
+
+--------------------------------------------------------------------------------
+
+		Computing Average Delivered Performance
+
+Below describes the steps to compute the average performance delivered by taking
+two different snapshots of feedback counters at time T1 and T2.
+
+T1: Read feedback_ctrs as fbc_t1
+    Wait or run some workload
+T2: Read feedback_ctrs as fbc_t2
+
+delivered_counter_delta = fbc_t2[del] - fbc_t1[del]
+reference_counter_delta = fbc_t2[ref] - fbc_t1[ref]
+
+delivered_perf = (refernce_perf x delivered_counter_delta) / reference_counter_delta

drivers/acpi/ac.c

@@ -87,6 +87,7 @@ static int acpi_ac_open_fs(struct inode *inode, struct file *file);
 
 
 static int ac_sleep_before_get_state_ms;
+static int ac_check_pmic = 1;
 
 static struct acpi_driver acpi_ac_driver = {
 	.name = "ac",
@@ -310,21 +311,43 @@ static int acpi_ac_battery_notify(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-static int thinkpad_e530_quirk(const struct dmi_system_id *d)
+static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
 {
 	ac_sleep_before_get_state_ms = 1000;
 	return 0;
 }
 
-static const struct dmi_system_id ac_dmi_table[] = {
+static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
+{
+	ac_check_pmic = 0;
+	return 0;
+}
+
+static const struct dmi_system_id ac_dmi_table[]  __initconst = {
 	{
+	/* Thinkpad e530 */
 	.callback = thinkpad_e530_quirk,
-	.ident = "thinkpad e530",
 	.matches = {
 		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 		DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
 		},
 	},
+	{
+		/* ECS EF20EA */
+		.callback = ac_do_not_check_pmic_quirk,
+		.matches = {
+			DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
+		},
+	},
+	{
+		/* Lenovo Ideapad Miix 320 */
+		.callback = ac_do_not_check_pmic_quirk,
+		.matches = {
+		  DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		  DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
+		  DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
+		},
+	},
 	{},
 };
 
@@ -384,7 +407,6 @@ static int acpi_ac_add(struct acpi_device *device)
 		kfree(ac);
 	}
 
-	dmi_check_system(ac_dmi_table);
 	return result;
 }
 
@@ -442,13 +464,17 @@ static int __init acpi_ac_init(void)
 	if (acpi_disabled)
 		return -ENODEV;
 
-	for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
-		if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
-				     acpi_ac_blacklist[i].hrv)) {
-			pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
-				acpi_ac_blacklist[i].hid);
-			return -ENODEV;
-		}
+	dmi_check_system(ac_dmi_table);
+
+	if (ac_check_pmic) {
+		for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
+			if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
+					     acpi_ac_blacklist[i].hrv)) {
+				pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
+					acpi_ac_blacklist[i].hid);
+				return -ENODEV;
+			}
+	}
 
 #ifdef CONFIG_ACPI_PROCFS_POWER
 	acpi_ac_dir = acpi_lock_ac_dir();

drivers/acpi/battery.c

@@ -74,6 +74,8 @@ static async_cookie_t async_cookie;
 static bool battery_driver_registered;
 static int battery_bix_broken_package;
 static int battery_notification_delay_ms;
+static int battery_ac_is_broken;
+static int battery_check_pmic = 1;
 static unsigned int cache_time = 1000;
 module_param(cache_time, uint, 0644);
 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
@@ -215,6 +217,20 @@ static bool acpi_battery_is_degraded(struct acpi_battery *battery)
 		battery->full_charge_capacity < battery->design_capacity;
 }
 
+static int acpi_battery_handle_discharging(struct acpi_battery *battery)
+{
+	/*
+	 * Some devices wrongly report discharging if the battery's charge level
+	 * was above the device's start charging threshold atm the AC adapter
+	 * was plugged in and the device thus did not start a new charge cycle.
+	 */
+	if ((battery_ac_is_broken || power_supply_is_system_supplied()) &&
+	    battery->rate_now == 0)
+		return POWER_SUPPLY_STATUS_NOT_CHARGING;
+
+	return POWER_SUPPLY_STATUS_DISCHARGING;
+}
+
 static int acpi_battery_get_property(struct power_supply *psy,
 				     enum power_supply_property psp,
 				     union power_supply_propval *val)
@@ -230,7 +246,7 @@ static int acpi_battery_get_property(struct power_supply *psy,
 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
 		if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
-			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+			val->intval = acpi_battery_handle_discharging(battery);
 		else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
 		else if (acpi_battery_is_charged(battery))
@@ -1332,23 +1348,64 @@ battery_notification_delay_quirk(const struct dmi_system_id *d)
 	return 0;
 }
 
+static int __init
+battery_ac_is_broken_quirk(const struct dmi_system_id *d)
+{
+	battery_ac_is_broken = 1;
+	return 0;
+}
+
+static int __init
+battery_do_not_check_pmic_quirk(const struct dmi_system_id *d)
+{
+	battery_check_pmic = 0;
+	return 0;
+}
+
 static const struct dmi_system_id bat_dmi_table[] __initconst = {
 	{
+		/* NEC LZ750/LS */
 		.callback = battery_bix_broken_package_quirk,
-		.ident = "NEC LZ750/LS",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
 		},
 	},
 	{
+		/* Acer Aspire V5-573G */
 		.callback = battery_notification_delay_quirk,
-		.ident = "Acer Aspire V5-573G",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
 		},
 	},
+	{
+		/* Point of View mobii wintab p800w */
+		.callback = battery_ac_is_broken_quirk,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
+			DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
+			DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"),
+			/* Above matches are too generic, add bios-date match */
+			DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
+		},
+	},
+	{
+		/* ECS EF20EA */
+		.callback = battery_do_not_check_pmic_quirk,
+		.matches = {
+			DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
+		},
+	},
+	{
+		/* Lenovo Ideapad Miix 320 */
+		.callback = battery_do_not_check_pmic_quirk,
+		.matches = {
+		  DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		  DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
+		  DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
+		},
+	},
 	{},
 };
 
@@ -1488,16 +1545,18 @@ static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
 	unsigned int i;
 	int result;
 
-	for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++)
-		if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) {
-			pr_info(PREFIX ACPI_BATTERY_DEVICE_NAME
-				": found native %s PMIC, not loading\n",
-				acpi_battery_blacklist[i]);
-			return;
-		}
-
 	dmi_check_system(bat_dmi_table);
 
+	if (battery_check_pmic) {
+		for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++)
+			if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) {
+				pr_info(PREFIX ACPI_BATTERY_DEVICE_NAME
+					": found native %s PMIC, not loading\n",
+					acpi_battery_blacklist[i]);
+				return;
+			}
+	}
+
 #ifdef CONFIG_ACPI_PROCFS_POWER
 	acpi_battery_dir = acpi_lock_battery_dir();
 	if (!acpi_battery_dir)