Merge tag 'staging-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging drivers patches from Greg KH:
 "Here's the big staging driver tree update for 3.20-rc1.

  Lots of little things in here, adding up to lots of overall cleanups.
  The IIO driver updates are also in here as they cross the staging tree
  boundry a lot.  I2O has moved into staging as well, as a plan to drop
  it from the tree eventually as that's a dead subsystem.

  All of this has been in linux-next with no reported issues for a
  while"

* tag 'staging-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (740 commits)
  staging: lustre: lustre: libcfs: define symbols as static
  staging: rtl8712: Do coding style cleanup
  staging: lustre: make obd_updatemax_lock static
  staging: rtl8188eu: core: switch with redundant cases
  staging: rtl8188eu: odm: conditional setting with no effect
  staging: rtl8188eu: odm: condition with no effect
  staging: ft1000: fix braces warning
  staging: sm7xxfb: fix remaining CamelCase
  staging: sm7xxfb: fix CamelCase
  staging: rtl8723au: multiple condition with no effect - if identical to else
  staging: sm7xxfb: make smtc_scr_info static
  staging/lustre/mdc: Initialize req in mdc_enqueue for !it case
  staging/lustre/clio: Do not allow group locks with gid 0
  staging/lustre/llite: don't add to page cache upon failure
  staging/lustre/llite: Add exception entry check after radix_tree
  staging/lustre/libcfs: protect kkuc_groups from write access
  staging/lustre/fld: refer to MDT0 for fld lookup in some cases
  staging/lustre/llite: Solve a race to access lli_has_smd in read case
  staging/lustre/ptlrpc: hold rq_lock when modify rq_flags
  staging/lustre/lnet: portal spreading rotor should be unsigned
  ...

70 files changed, 10869 insertions, 931 deletions

diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 345395e9dc6e..4132935dc929 100644
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -27,7 +27,6 @@ boolean "IIO callback buffer used for push in-kernel interfaces"
 	  usage.  That is, those where the data is pushed to the consumer.
 
 config IIO_KFIFO_BUF
-	select IIO_TRIGGER
 	tristate "Industrial I/O buffering based on kfifo"
 	help
 	  A simple fifo based on kfifo.  Note that this currently provides
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 9b9be8725e9d..7c9a9a94a8ce 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -43,6 +43,9 @@ config HID_SENSOR_ACCEL_3D
 	  Say yes here to build support for the HID SENSOR
 	  accelerometers 3D.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called hid-sensor-accel-3d.
+
 config IIO_ST_ACCEL_3AXIS
 	tristate "STMicroelectronics accelerometers 3-Axis Driver"
 	depends on (I2C || SPI_MASTER) && SYSFS
@@ -80,6 +83,9 @@ config KXSD9
 	  Say yes here to build support for the Kionix KXSD9 accelerometer.
 	  Currently this only supports the device via an SPI interface.
 
+	  To compile this driver as a module, choose M here: the module
+	  will be called kxsd9.
+
 config MMA8452
 	tristate "Freescale MMA8452Q Accelerometer Driver"
 	depends on I2C
@@ -105,4 +111,29 @@ config KXCJK1013
 	  To compile this driver as a module, choose M here: the module will
 	  be called kxcjk-1013.
 
+config MMA9551_CORE
+	tristate
+
+config MMA9551
+	tristate "Freescale MMA9551L Intelligent Motion-Sensing Platform Driver"
+	depends on I2C
+	select MMA9551_CORE
+
+	help
+	  Say yes here to build support for the Freescale MMA9551L
+	  Intelligent Motion-Sensing Platform Driver.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma9551.
+
+config MMA9553
+	tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver"
+	depends on I2C
+	select MMA9551_CORE
+	help
+	  Say yes here to build support for the Freescale MMA9553L
+	  Intelligent Pedometer Platform Driver.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma9553.
 endmenu
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index a593996c6539..99d89e46cad1 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -10,6 +10,12 @@ obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
 obj-$(CONFIG_KXSD9)	+= kxsd9.o
 obj-$(CONFIG_MMA8452)	+= mma8452.o
 
+obj-$(CONFIG_MMA9551_CORE)	+= mma9551_core.o
+obj-$(CONFIG_MMA9551)		+= mma9551.o
+obj-$(CONFIG_MMA9553)		+= mma9553.o
+
+obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_accel_sensor.o
+
 obj-$(CONFIG_IIO_ST_ACCEL_3AXIS) += st_accel.o
 st_accel-y := st_accel_core.o
 st_accel-$(CONFIG_IIO_BUFFER) += st_accel_buffer.o
diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c
index d5d95317003a..df6a593bd4bd 100644
--- a/drivers/iio/accel/hid-sensor-accel-3d.c
+++ b/drivers/iio/accel/hid-sensor-accel-3d.c
@@ -111,19 +111,12 @@ static int accel_3d_read_raw(struct iio_dev *indio_dev,
 	int report_id = -1;
 	u32 address;
 	int ret_type;
-	s32 poll_value;
 
 	*val = 0;
 	*val2 = 0;
 	switch (mask) {
 	case 0:
-		poll_value = hid_sensor_read_poll_value(
-					&accel_state->common_attributes);
-		if (poll_value < 0)
-			return -EINVAL;
-
 		hid_sensor_power_state(&accel_state->common_attributes, true);
-		msleep_interruptible(poll_value * 2);
 		report_id = accel_state->accel[chan->scan_index].report_id;
 		address = accel_3d_addresses[chan->scan_index];
 		if (report_id >= 0)
@@ -419,6 +412,7 @@ static struct platform_driver hid_accel_3d_platform_driver = {
 	.id_table = hid_accel_3d_ids,
 	.driver = {
 		.name	= KBUILD_MODNAME,
+		.pm	= &hid_sensor_pm_ops,
 	},
 	.probe		= hid_accel_3d_probe,
 	.remove		= hid_accel_3d_remove,
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
index da2fe93739a2..567de269cc00 100644
--- a/drivers/iio/accel/kxcjk-1013.c
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -108,6 +108,7 @@ struct kxcjk1013_data {
 	bool motion_trigger_on;
 	int64_t timestamp;
 	enum kx_chipset chipset;
+	bool is_smo8500_device;
 };
 
 enum kxcjk1013_axis {
@@ -377,6 +378,7 @@ static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
 
 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
 {
+#ifdef CONFIG_PM
 	int ret;
 
 	if (on)
@@ -388,8 +390,11 @@ static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
 	if (ret < 0) {
 		dev_err(&data->client->dev,
 			"Failed: kxcjk1013_set_power_state for %d\n", on);
+		if (on)
+			pm_runtime_put_noidle(&data->client->dev);
 		return ret;
 	}
+#endif
 
 	return 0;
 }
@@ -858,6 +863,8 @@ static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
 
 	ret =  kxcjk1013_setup_any_motion_interrupt(data, state);
 	if (ret < 0) {
+		kxcjk1013_set_power_state(data, false);
+		data->ev_enable_state = 0;
 		mutex_unlock(&data->mutex);
 		return ret;
 	}
@@ -1008,6 +1015,7 @@ static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
 	else
 		ret = kxcjk1013_setup_new_data_interrupt(data, state);
 	if (ret < 0) {
+		kxcjk1013_set_power_state(data, false);
 		mutex_unlock(&data->mutex);
 		return ret;
 	}
@@ -1131,12 +1139,16 @@ static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
 }
 
 static const char *kxcjk1013_match_acpi_device(struct device *dev,
-					       enum kx_chipset *chipset)
+					       enum kx_chipset *chipset,
+					       bool *is_smo8500_device)
 {
 	const struct acpi_device_id *id;
+
 	id = acpi_match_device(dev->driver->acpi_match_table, dev);
 	if (!id)
 		return NULL;
+	if (strcmp(id->id, "SMO8500") == 0)
+		*is_smo8500_device = true;
 	*chipset = (enum kx_chipset)id->driver_data;
 
 	return dev_name(dev);
@@ -1151,6 +1163,8 @@ static int kxcjk1013_gpio_probe(struct i2c_client *client,
 
 	if (!client)
 		return -EINVAL;
+	if (data->is_smo8500_device)
+		return -ENOTSUPP;
 
 	dev = &client->dev;
 
@@ -1200,7 +1214,8 @@ static int kxcjk1013_probe(struct i2c_client *client,
 		name = id->name;
 	} else if (ACPI_HANDLE(&client->dev)) {
 		name = kxcjk1013_match_acpi_device(&client->dev,
-						   &data->chipset);
+						   &data->chipset,
+						   &data->is_smo8500_device);
 	} else
 		return -ENODEV;
 
@@ -1228,21 +1243,25 @@ static int kxcjk1013_probe(struct i2c_client *client,
 						KXCJK1013_IRQ_NAME,
 						indio_dev);
 		if (ret)
-			return ret;
+			goto err_poweroff;
 
 		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
 							   "%s-dev%d",
 							   indio_dev->name,
 							   indio_dev->id);
-		if (!data->dready_trig)
-			return -ENOMEM;
+		if (!data->dready_trig) {
+			ret = -ENOMEM;
+			goto err_poweroff;
+		}
 
 		data->motion_trig = devm_iio_trigger_alloc(&client->dev,
 							  "%s-any-motion-dev%d",
 							  indio_dev->name,
 							  indio_dev->id);
-		if (!data->motion_trig)
-			return -ENOMEM;
+		if (!data->motion_trig) {
+			ret = -ENOMEM;
+			goto err_poweroff;
+		}
 
 		data->dready_trig->dev.parent = &client->dev;
 		data->dready_trig->ops = &kxcjk1013_trigger_ops;
@@ -1251,7 +1270,7 @@ static int kxcjk1013_probe(struct i2c_client *client,
 		iio_trigger_get(indio_dev->trig);
 		ret = iio_trigger_register(data->dready_trig);
 		if (ret)
-			return ret;
+			goto err_poweroff;
 
 		data->motion_trig->dev.parent = &client->dev;
 		data->motion_trig->ops = &kxcjk1013_trigger_ops;
@@ -1300,6 +1319,8 @@ err_trigger_unregister:
 		iio_trigger_unregister(data->dready_trig);
 	if (data->motion_trig)
 		iio_trigger_unregister(data->motion_trig);
+err_poweroff:
+	kxcjk1013_set_mode(data, STANDBY);
 
 	return ret;
 }
@@ -1349,10 +1370,7 @@ static int kxcjk1013_resume(struct device *dev)
 	int ret = 0;
 
 	mutex_lock(&data->mutex);
-	/* Check, if the suspend occured while active */
-	if (data->dready_trigger_on || data->motion_trigger_on ||
-							data->ev_enable_state)
-		ret = kxcjk1013_set_mode(data, OPERATION);
+	ret = kxcjk1013_set_mode(data, OPERATION);
 	mutex_unlock(&data->mutex);
 
 	return ret;
@@ -1364,8 +1382,14 @@ static int kxcjk1013_runtime_suspend(struct device *dev)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
 
-	return kxcjk1013_set_mode(data, STANDBY);
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "powering off device failed\n");
+		return -EAGAIN;
+	}
+	return 0;
 }
 
 static int kxcjk1013_runtime_resume(struct device *dev)
@@ -1399,6 +1423,7 @@ static const struct acpi_device_id kx_acpi_match[] = {
 	{"KXCJ1013", KXCJK1013},
 	{"KXCJ1008", KXCJ91008},
 	{"KXTJ1009", KXTJ21009},
+	{"SMO8500",  KXCJ91008},
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
@@ -1407,6 +1432,7 @@ static const struct i2c_device_id kxcjk1013_id[] = {
 	{"kxcjk1013", KXCJK1013},
 	{"kxcj91008", KXCJ91008},
 	{"kxtj21009", KXTJ21009},
+	{"SMO8500",   KXCJ91008},
 	{}
 };
 
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index 3c12d4966376..5b80657883bb 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -111,7 +111,7 @@ static const int mma8452_samp_freq[8][2] = {
 	{6, 250000}, {1, 560000}
 };
 
-/* 
+/*
  * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048
  * The userspace interface uses m/s^2 and we declare micro units
  * So scale factor is given by:
diff --git a/drivers/iio/accel/mma9551.c b/drivers/iio/accel/mma9551.c
new file mode 100644
index 000000000000..46c38351c6a3
--- /dev/null
+++ b/drivers/iio/accel/mma9551.c
@@ -0,0 +1,637 @@
+/*
+ * Freescale MMA9551L Intelligent Motion-Sensing Platform driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+#define MMA9551_DRV_NAME		"mma9551"
+#define MMA9551_IRQ_NAME		"mma9551_event"
+#define MMA9551_GPIO_NAME		"mma9551_int"
+#define MMA9551_GPIO_COUNT		4
+
+/* Tilt application (inclination in IIO terms). */
+#define MMA9551_TILT_XZ_ANG_REG		0x00
+#define MMA9551_TILT_YZ_ANG_REG		0x01
+#define MMA9551_TILT_XY_ANG_REG		0x02
+#define MMA9551_TILT_ANGFLG		BIT(7)
+#define MMA9551_TILT_QUAD_REG		0x03
+#define MMA9551_TILT_XY_QUAD_SHIFT	0
+#define MMA9551_TILT_YZ_QUAD_SHIFT	2
+#define MMA9551_TILT_XZ_QUAD_SHIFT	4
+#define MMA9551_TILT_CFG_REG		0x01
+#define MMA9551_TILT_ANG_THRESH_MASK	GENMASK(3, 0)
+
+#define MMA9551_DEFAULT_SAMPLE_RATE	122	/* Hz */
+
+/* Tilt events are mapped to the first three GPIO pins. */
+enum mma9551_tilt_axis {
+	mma9551_x = 0,
+	mma9551_y,
+	mma9551_z,
+};
+
+struct mma9551_data {
+	struct i2c_client *client;
+	struct mutex mutex;
+	int event_enabled[3];
+	int irqs[MMA9551_GPIO_COUNT];
+};
+
+static int mma9551_read_incli_chan(struct i2c_client *client,
+				   const struct iio_chan_spec *chan,
+				   int *val)
+{
+	u8 quad_shift, angle, quadrant;
+	u16 reg_addr;
+	int ret;
+
+	switch (chan->channel2) {
+	case IIO_MOD_X:
+		reg_addr = MMA9551_TILT_YZ_ANG_REG;
+		quad_shift = MMA9551_TILT_YZ_QUAD_SHIFT;
+		break;
+	case IIO_MOD_Y:
+		reg_addr = MMA9551_TILT_XZ_ANG_REG;
+		quad_shift = MMA9551_TILT_XZ_QUAD_SHIFT;
+		break;
+	case IIO_MOD_Z:
+		reg_addr = MMA9551_TILT_XY_ANG_REG;
+		quad_shift = MMA9551_TILT_XY_QUAD_SHIFT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = mma9551_set_power_state(client, true);
+	if (ret < 0)
+		return ret;
+
+	ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT,
+				       reg_addr, &angle);
+	if (ret < 0)
+		goto out_poweroff;
+
+	ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT,
+				       MMA9551_TILT_QUAD_REG, &quadrant);
+	if (ret < 0)
+		goto out_poweroff;
+
+	angle &= ~MMA9551_TILT_ANGFLG;
+	quadrant = (quadrant >> quad_shift) & 0x03;
+
+	if (quadrant == 1 || quadrant == 3)
+		*val = 90 * (quadrant + 1) - angle;
+	else
+		*val = angle + 90 * quadrant;
+
+	ret = IIO_VAL_INT;
+
+out_poweroff:
+	mma9551_set_power_state(client, false);
+	return ret;
+}
+
+static int mma9551_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		switch (chan->type) {
+		case IIO_INCLI:
+			mutex_lock(&data->mutex);
+			ret = mma9551_read_incli_chan(data->client, chan, val);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			mutex_lock(&data->mutex);
+			ret = mma9551_read_accel_chan(data->client,
+						      chan, val, val2);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			return mma9551_read_accel_scale(val, val2);
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9551_read_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+
+	switch (chan->type) {
+	case IIO_INCLI:
+		/* IIO counts axes from 1, because IIO_NO_MOD is 0. */
+		return data->event_enabled[chan->channel2 - 1];
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9551_config_incli_event(struct iio_dev *indio_dev,
+				      enum iio_modifier axis,
+				      int state)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+	enum mma9551_tilt_axis mma_axis;
+	int ret;
+
+	/* IIO counts axes from 1, because IIO_NO_MOD is 0. */
+	mma_axis = axis - 1;
+
+	if (data->event_enabled[mma_axis] == state)
+		return 0;
+
+	if (state == 0) {
+		ret = mma9551_gpio_config(data->client,
+					  (enum mma9551_gpio_pin)mma_axis,
+					  MMA9551_APPID_NONE, 0, 0);
+		if (ret < 0)
+			return ret;
+
+		ret = mma9551_set_power_state(data->client, false);
+		if (ret < 0)
+			return ret;
+	} else {
+		int bitnum;
+
+		/* Bit 7 of each angle register holds the angle flag. */
+		switch (axis) {
+		case IIO_MOD_X:
+			bitnum = 7 + 8 * MMA9551_TILT_YZ_ANG_REG;
+			break;
+		case IIO_MOD_Y:
+			bitnum = 7 + 8 * MMA9551_TILT_XZ_ANG_REG;
+			break;
+		case IIO_MOD_Z: