Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_AD5446_H
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#define _LINUX_AD5446_H
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#include <linux/bits.h>
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#include <linux/compiler.h>
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#include <linux/iio/iio.h>
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#include <linux/mutex.h>
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#include <linux/types.h>
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struct device;
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extern const struct iio_chan_spec_ext_info ad5446_ext_info_powerdown[];
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#define _AD5446_CHANNEL(bits, storage, _shift, ext) { \
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.type = IIO_VOLTAGE, \
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.indexed = 1, \
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.output = 1, \
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.channel = 0, \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
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.scan_type = { \
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.sign = 'u', \
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.realbits = (bits), \
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.storagebits = (storage), \
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.shift = (_shift), \
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}, \
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.ext_info = (ext), \
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}
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#define AD5446_CHANNEL(bits, storage, shift) \
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_AD5446_CHANNEL(bits, storage, shift, NULL)
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#define AD5446_CHANNEL_POWERDOWN(bits, storage, shift) \
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_AD5446_CHANNEL(bits, storage, shift, ad5446_ext_info_powerdown)
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/**
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* struct ad5446_state - driver instance specific data
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* @dev: this device
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* @chip_info: chip model specific constants, available modes etc
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* @vref_mv: actual reference voltage used
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* @cached_val: store/retrieve values during power down
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* @pwr_down_mode: power down mode (1k, 100k or tristate)
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* @pwr_down: true if the device is in power down
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* @lock: lock to protect the data buffer during write ops
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*/
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struct ad5446_state {
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struct device *dev;
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const struct ad5446_chip_info *chip_info;
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unsigned short vref_mv;
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unsigned int cached_val;
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unsigned int pwr_down_mode;
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unsigned int pwr_down;
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/* mutex to protect device shared data */
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struct mutex lock;
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union {
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__be16 d16;
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u8 d24[3];
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} __aligned(IIO_DMA_MINALIGN);
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};
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/**
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* struct ad5446_chip_info - chip specific information
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* @channel: channel spec for the DAC
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* @int_vref_mv: AD5620/40/60: the internal reference voltage
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* @write: chip specific helper function to write to the register
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*/
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struct ad5446_chip_info {
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struct iio_chan_spec channel;
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u16 int_vref_mv;
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int (*write)(struct ad5446_state *st, unsigned int val);
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};
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int ad5446_probe(struct device *dev, const char *name,
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const struct ad5446_chip_info *chip_info);
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#endif
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