Merge tag 'iio-for-3.8e' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

From Jonathan:

  "Fifth round of new IIO drivers, cleanups and fixes for the 3.8 cycle.

  Here we have a number of minor fixes.
  * a quirk for the hid sensor driver should be a boolean option.
  * return an error for a failed memdup in the hid sensor driver.
  * Fix a return value in adt7410.
  * A double free in the IIO event infrastructure.
  * Disabling interrupts in tsl2563 was wrong (never been correct!)
  * Incorrect signature for the iio_buffer_register stub
  * Incorrect return for isl29018 write_raw callback.
  * A number of minor fixes as part of the various rework series.

  New drivers and major rework.
  * Introduce and use extensively an adis library for numerous spi
    Analog Devices mems sensors.  This then moves out of staging.
  * Lots of new stuff then added to this library to support newer
    sensors.
  * New drivers for ADIS16136 and ADIS16480 and similar.
  * Core support for barometric pressure sensors.
  * ad7298 cleanup and move out of staging.

  The bulk of this is from Lars-Peter Clausen.  He's been rather
  busy!"

5 files changed, 305 insertions, 1 deletions

diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h
index 027040569180..f3eea18fdf46 100644
--- a/include/linux/iio/buffer.h
+++ b/include/linux/iio/buffer.h
@@ -195,7 +195,7 @@ bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev,
 #else /* CONFIG_IIO_BUFFER */
 
 static inline int iio_buffer_register(struct iio_dev *indio_dev,
-					   struct iio_chan_spec *channels,
+					   const struct iio_chan_spec *channels,
 					   int num_channels)
 {
 	return 0;
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index adca93a999a7..da8c776ba0bd 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -620,6 +620,9 @@ static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev)
 };
 #endif
 
+int iio_str_to_fixpoint(const char *str, int fract_mult, int *integer,
+	int *fract);
+
 /**
  * IIO_DEGREE_TO_RAD() - Convert degree to rad
  * @deg: A value in degree
diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
new file mode 100644
index 000000000000..ff781dca2e9a
--- /dev/null
+++ b/include/linux/iio/imu/adis.h
@@ -0,0 +1,280 @@
+/*
+ * Common library for ADIS16XXX devices
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *   Author: Lars-Peter Clausen <[email protected]>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __IIO_ADIS_H__
+#define __IIO_ADIS_H__
+
+#include <linux/spi/spi.h>
+#include <linux/interrupt.h>
+#include <linux/iio/types.h>
+
+#define ADIS_WRITE_REG(reg) ((0x80 | (reg)))
+#define ADIS_READ_REG(reg) ((reg) & 0x7f)
+
+#define ADIS_PAGE_SIZE 0x80
+#define ADIS_REG_PAGE_ID 0x00
+
+struct adis;
+
+/**
+ * struct adis_data - ADIS chip variant specific data
+ * @read_delay: SPI delay for read operations in us
+ * @write_delay: SPI delay for write operations in us
+ * @glob_cmd_reg: Register address of the GLOB_CMD register
+ * @msc_ctrl_reg: Register address of the MSC_CTRL register
+ * @diag_stat_reg: Register address of the DIAG_STAT register
+ * @status_error_msgs: Array of error messgaes
+ * @status_error_mask:
+ */
+struct adis_data {
+	unsigned int read_delay;
+	unsigned int write_delay;
+
+	unsigned int glob_cmd_reg;
+	unsigned int msc_ctrl_reg;
+	unsigned int diag_stat_reg;
+
+	unsigned int self_test_mask;
+	unsigned int startup_delay;
+
+	const char * const *status_error_msgs;
+	unsigned int status_error_mask;
+
+	int (*enable_irq)(struct adis *adis, bool enable);
+
+	bool has_paging;
+};
+
+struct adis {
+	struct spi_device	*spi;
+	struct iio_trigger	*trig;
+
+	const struct adis_data	*data;
+
+	struct mutex		txrx_lock;
+	struct spi_message	msg;
+	struct spi_transfer	*xfer;
+	unsigned int		current_page;
+	void			*buffer;
+
+	uint8_t			tx[10] ____cacheline_aligned;
+	uint8_t			rx[4];
+};
+
+int adis_init(struct adis *adis, struct iio_dev *indio_dev,
+	struct spi_device *spi, const struct adis_data *data);
+int adis_reset(struct adis *adis);
+
+int adis_write_reg(struct adis *adis, unsigned int reg,
+	unsigned int val, unsigned int size);
+int adis_read_reg(struct adis *adis, unsigned int reg,
+	unsigned int *val, unsigned int size);
+
+/**
+ * adis_write_reg_8() - Write single byte to a register
+ * @adis: The adis device
+ * @reg: The address of the register to be written
+ * @value: The value to write
+ */
+static inline int adis_write_reg_8(struct adis *adis, unsigned int reg,
+	uint8_t val)
+{
+	return adis_write_reg(adis, reg, val, 1);
+}
+
+/**
+ * adis_write_reg_16() - Write 2 bytes to a pair of registers
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @value: Value to be written
+ */
+static inline int adis_write_reg_16(struct adis *adis, unsigned int reg,
+	uint16_t val)
+{
+	return adis_write_reg(adis, reg, val, 2);
+}
+
+/**
+ * adis_write_reg_32() - write 4 bytes to four registers
+ * @adis: The adis device
+ * @reg: The address of the lower of the four register
+ * @value: Value to be written
+ */
+static inline int adis_write_reg_32(struct adis *adis, unsigned int reg,
+	uint32_t val)
+{
+	return adis_write_reg(adis, reg, val, 4);
+}
+
+/**
+ * adis_read_reg_16() - read 2 bytes from a 16-bit register
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @val: The value read back from the device
+ */
+static inline int adis_read_reg_16(struct adis *adis, unsigned int reg,
+	uint16_t *val)
+{
+	unsigned int tmp;
+	int ret;
+
+	ret = adis_read_reg(adis, reg, &tmp, 2);
+	*val = tmp;
+
+	return ret;
+}
+
+/**
+ * adis_read_reg_32() - read 4 bytes from a 32-bit register
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @val: The value read back from the device
+ */
+static inline int adis_read_reg_32(struct adis *adis, unsigned int reg,
+	uint32_t *val)
+{
+	unsigned int tmp;
+	int ret;
+
+	ret = adis_read_reg(adis, reg, &tmp, 4);
+	*val = tmp;
+
+	return ret;
+}
+
+int adis_enable_irq(struct adis *adis, bool enable);
+int adis_check_status(struct adis *adis);
+
+int adis_initial_startup(struct adis *adis);
+
+int adis_single_conversion(struct iio_dev *indio_dev,
+	const struct iio_chan_spec *chan, unsigned int error_mask,
+	int *val);
+
+#define ADIS_VOLTAGE_CHAN(addr, si, chan, name, bits) { \
+	.type = IIO_VOLTAGE, \
+	.indexed = 1, \
+	.channel = (chan), \
+	.extend_name = name, \
+	.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \
+	.address = (addr), \
+	.scan_index = (si), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = (bits), \
+		.storagebits = 16, \
+		.endianness = IIO_BE, \
+	}, \
+}
+
+#define ADIS_SUPPLY_CHAN(addr, si, bits) \
+	ADIS_VOLTAGE_CHAN(addr, si, 0, "supply", bits)
+
+#define ADIS_AUX_ADC_CHAN(addr, si, bits) \
+	ADIS_VOLTAGE_CHAN(addr, si, 1, NULL, bits)
+
+#define ADIS_TEMP_CHAN(addr, si, bits) { \
+	.type = IIO_TEMP, \
+	.indexed = 1, \
+	.channel = 0, \
+	.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \
+		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, \
+	.address = (addr), \
+	.scan_index = (si), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = (bits), \
+		.storagebits = 16, \
+		.endianness = IIO_BE, \
+	}, \
+}
+
+#define ADIS_MOD_CHAN(_type, mod, addr, si, info, bits) { \
+	.type = (_type), \
+	.modified = 1, \
+	.channel2 = IIO_MOD_ ## mod, \
+	.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT | \
+		 info, \
+	.address = (addr), \
+	.scan_index = (si), \
+	.scan_type = { \
+		.sign = 's', \
+		.realbits = (bits), \
+		.storagebits = 16, \
+		.endianness = IIO_BE, \
+	}, \
+}
+
+#define ADIS_ACCEL_CHAN(mod, addr, si, info, bits) \
+	ADIS_MOD_CHAN(IIO_ACCEL, mod, addr, si, info, bits)
+
+#define ADIS_GYRO_CHAN(mod, addr, si, info, bits) \
+	ADIS_MOD_CHAN(IIO_ANGL_VEL, mod, addr, si, info, bits)
+
+#define ADIS_INCLI_CHAN(mod, addr, si, info, bits) \
+	ADIS_MOD_CHAN(IIO_INCLI, mod, addr, si, info, bits)
+
+#define ADIS_ROT_CHAN(mod, addr, si, info, bits) \
+	ADIS_MOD_CHAN(IIO_ROT, mod, addr, si, info, bits)
+
+#ifdef CONFIG_IIO_ADIS_LIB_BUFFER
+
+int adis_setup_buffer_and_trigger(struct adis *adis,
+	struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *));
+void adis_cleanup_buffer_and_trigger(struct adis *adis,
+	struct iio_dev *indio_dev);
+
+int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);
+void adis_remove_trigger(struct adis *adis);
+
+int adis_update_scan_mode(struct iio_dev *indio_dev,
+	const unsigned long *scan_mask);
+
+#else /* CONFIG_IIO_BUFFER */
+
+static inline int adis_setup_buffer_and_trigger(struct adis *adis,
+	struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *))
+{
+	return 0;
+}
+
+static inline void adis_cleanup_buffer_and_trigger(struct adis *adis,
+	struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis_probe_trigger(struct adis *adis,
+	struct iio_dev *indio_dev)
+{
+	return 0;
+}
+
+static inline void adis_remove_trigger(struct adis *adis)
+{
+}
+
+#define adis_update_scan_mode NULL
+
+#endif /* CONFIG_IIO_BUFFER */
+
+#ifdef CONFIG_DEBUG_FS
+
+int adis_debugfs_reg_access(struct iio_dev *indio_dev,
+	unsigned int reg, unsigned int writeval, unsigned int *readval);
+
+#else
+
+#define adis_debugfs_reg_access NULL
+
+#endif
+
+#endif
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 87b196a2d698..88bf0f0d27b4 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -28,6 +28,7 @@ enum iio_chan_type {
 	IIO_CAPACITANCE,
 	IIO_ALTVOLTAGE,
 	IIO_CCT,
+	IIO_PRESSURE,
 };
 
 enum iio_modifier {
diff --git a/include/linux/platform_data/ad7298.h b/include/linux/platform_data/ad7298.h
new file mode 100644
index 000000000000..fbf8adf1363a
--- /dev/null
+++ b/include/linux/platform_data/ad7298.h
@@ -0,0 +1,20 @@
+/*
+ * AD7298 SPI ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef __LINUX_PLATFORM_DATA_AD7298_H__
+#define __LINUX_PLATFORM_DATA_AD7298_H__
+
+/**
+ * struct ad7298_platform_data - Platform data for the ad7298 ADC driver
+ * @ext_ref: Whether to use an external reference voltage.
+ **/
+struct ad7298_platform_data {
+	bool ext_ref;
+};
+
+#endif /* IIO_ADC_AD7298_H_ */