Merge tag 'pm+acpi-3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:

 - Fix for an ACPI regression related to the handling of fixed events
   that caused netlink routines to be (incorrectly) run in interrupt
   context from Lan Tianyu

 - Fix for an ACPI EC driver regression on Acer Aspire V5-573G that
   caused AC/battery plug/unplug and video brightness change
   notifications to be delayed on that machine from Lv Zheng

 - Fix for an ACPI device enumeration regression that caused ACPI driver
   probe to fail for some devices where it succeeded before (Rafael J
   Wysocki)

 - intel_pstate driver fix to prevent it from printing an information
   message for every CPU in the system on every boot from Andi Kleen

 - s5pv210 cpufreq driver fix to remove an __init annotation from a
   routine that in fact can be called at any time after init too from
   Mark Brown

 - New Intel Braswell device ID for the ACPI LPSS (Low-Power Subsystem)
   driver from Alan Cox

 - New Intel Braswell CPU ID for intel_pstate from Mika Westerberg

* tag 'pm+acpi-3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: s5pv210: Remove spurious __init annotation
  cpufreq: intel_pstate: Add CPU ID for Braswell processor
  intel_pstate: Turn per cpu printk into pr_debug
  ACPI / LPSS: Add ACPI IDs for Intel Braswell
  ACPI / EC: Add support to disallow QR_EC to be issued before completing previous QR_EC
  ACPI / EC: Add support to disallow QR_EC to be issued when SCI_EVT isn't set
  ACPI: Run fixed event device notifications in process context
  ACPI / scan: Allow ACPI drivers to bind to PNP device objects

5 files changed, 49 insertions, 11 deletions

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index ce06149088c5..9dfec48dd4e5 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -196,6 +196,17 @@ static struct lpss_device_desc byt_i2c_dev_desc = {
         .setup = lpss_i2c_setup,
 };
 
+static struct lpss_shared_clock bsw_pwm_clock = {
+        .name = "pwm_clk",
+        .rate = 19200000,
+};
+
+static struct lpss_device_desc bsw_pwm_dev_desc = {
+        .clk_required = true,
+        .save_ctx = true,
+        .shared_clock = &bsw_pwm_clock,
+};
+
 #else
 
 #define LPSS_ADDR(desc) (0UL)
@@ -225,6 +236,12 @@ static const struct acpi_device_id acpi_lpss_device_ids[] = {
         { "INT33B2", },
         { "INT33FC", },
 
+        /* Braswell LPSS devices */
+        { "80862288", LPSS_ADDR(bsw_pwm_dev_desc) },
+        { "8086228A", LPSS_ADDR(byt_uart_dev_desc) },
+        { "8086228E", LPSS_ADDR(byt_spi_dev_desc) },
+        { "808622C1", LPSS_ADDR(byt_i2c_dev_desc) },
+
         { "INT3430", LPSS_ADDR(lpt_dev_desc) },
         { "INT3431", LPSS_ADDR(lpt_dev_desc) },
         { "INT3432", LPSS_ADDR(lpt_i2c_dev_desc) },
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index a66ab658abbc..9922cc46b15c 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -197,6 +197,8 @@ static bool advance_transaction(struct acpi_ec *ec)
                                 t->rdata[t->ri++] = acpi_ec_read_data(ec);
                                 if (t->rlen == t->ri) {
                                         t->flags |= ACPI_EC_COMMAND_COMPLETE;
+                                        if (t->command == ACPI_EC_COMMAND_QUERY)
+                                                pr_debug("hardware QR_EC completion\n");
                                         wakeup = true;
                                 }
                         } else
@@ -208,7 +210,20 @@ static bool advance_transaction(struct acpi_ec *ec)
                 }
                 return wakeup;
         } else {
-                if ((status & ACPI_EC_FLAG_IBF) == 0) {
+                /*
+                 * There is firmware refusing to respond QR_EC when SCI_EVT
+                 * is not set, for which case, we complete the QR_EC
+                 * without issuing it to the firmware.
+                 * https://bugzilla.kernel.org/show_bug.cgi?id=86211
+                 */
+                if (!(status & ACPI_EC_FLAG_SCI) &&
+                    (t->command == ACPI_EC_COMMAND_QUERY)) {
+                        t->flags |= ACPI_EC_COMMAND_POLL;
+                        t->rdata[t->ri++] = 0x00;
+                        t->flags |= ACPI_EC_COMMAND_COMPLETE;
+                        pr_debug("software QR_EC completion\n");
+                        wakeup = true;
+                } else if ((status & ACPI_EC_FLAG_IBF) == 0) {
                         acpi_ec_write_cmd(ec, t->command);
                         t->flags |= ACPI_EC_COMMAND_POLL;
                 } else
@@ -288,11 +303,11 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
         /* following two actions should be kept atomic */
         ec->curr = t;
         start_transaction(ec);
-        if (ec->curr->command == ACPI_EC_COMMAND_QUERY)
-                clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
         spin_unlock_irqrestore(&ec->lock, tmp);
         ret = ec_poll(ec);
         spin_lock_irqsave(&ec->lock, tmp);
+        if (ec->curr->command == ACPI_EC_COMMAND_QUERY)
+                clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
         ec->curr = NULL;
         spin_unlock_irqrestore(&ec->lock, tmp);
         return ret;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 0a817ad24f16..9a9298994e26 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -922,12 +922,17 @@ static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
         device->driver->ops.notify(device, event);
 }
 
-static acpi_status acpi_device_notify_fixed(void *data)
+static void acpi_device_notify_fixed(void *data)
 {
         struct acpi_device *device = data;
 
         /* Fixed hardware devices have no handles */
         acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
+}
+
+static acpi_status acpi_device_fixed_event(void *data)
+{
+        acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
         return AE_OK;
 }
 
@@ -938,12 +943,12 @@ static int acpi_device_install_notify_handler(struct acpi_device *device)
         if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
                 status =
                     acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
-                                                     acpi_device_notify_fixed,
+                                                     acpi_device_fixed_event,
                                                      device);
         else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
                 status =
                     acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
-                                                     acpi_device_notify_fixed,
+                                                     acpi_device_fixed_event,
                                                      device);
         else
                 status = acpi_install_notify_handler(device->handle,
@@ -960,10 +965,10 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device)
 {
         if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
                 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
-                                                acpi_device_notify_fixed);
+                                                acpi_device_fixed_event);
         else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
                 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
-                                                acpi_device_notify_fixed);
+                                                acpi_device_fixed_event);
         else
                 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
                                            acpi_device_notify);
@@ -975,7 +980,7 @@ static int acpi_device_probe(struct device *dev)
         struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
         int ret;
 
-        if (acpi_dev->handler)
+        if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev))
                 return -EINVAL;
 
         if (!acpi_drv->ops.add)
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index c5eac949760d..e396ad3f8f3f 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -660,6 +660,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
         ICPU(0x3f, core_params),
         ICPU(0x45, core_params),
         ICPU(0x46, core_params),
+        ICPU(0x4c, byt_params),
         ICPU(0x4f, core_params),
         ICPU(0x56, core_params),
         {}
@@ -688,7 +689,7 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
 
         add_timer_on(&cpu->timer, cpunum);
 
-        pr_info("Intel pstate controlling: cpu %d\n", cpunum);
+        pr_debug("Intel pstate controlling: cpu %d\n", cpunum);
 
         return 0;
 }
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index 9a68225a757e..3f9791f07b8e 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -501,7 +501,7 @@ static int check_mem_type(void __iomem *dmc_reg)
         return val >> 8;
 }
 
-static int __init s5pv210_cpu_init(struct cpufreq_policy *policy)
+static int s5pv210_cpu_init(struct cpufreq_policy *policy)
 {
         unsigned long mem_type;
         int ret;