mirror of https://gitee.com/openkylin/linux.git
staging: iio: meter: new driver for ADE7758 devices
Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Barry Song
Greg Kroah-Hartman
parent
8d97a5877b
commit
8210cfe9bd
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@ -16,3 +16,12 @@ config ADE7754
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help
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Say yes here to build support for Analog Devices ADE7754 Polyphase
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Multifunction Energy Metering IC Driver.
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config ADE7758
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tristate "Analog Devices ADE7758 Poly Phase Multifunction Energy Metering IC Driver"
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depends on SPI
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select IIO_TRIGGER if IIO_RING_BUFFER
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select IIO_SW_RING if IIO_RING_BUFFER
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help
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Say yes here to build support for Analog Devices ADE7758 Polyphase
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Multifunction Energy Metering IC with Per Phase Information Driver.
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@ -4,3 +4,7 @@
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obj-$(CONFIG_ADE7753) += ade7753.o
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obj-$(CONFIG_ADE7754) += ade7754.o
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ade7758-y := ade7758_core.o
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ade7758-$(CONFIG_IIO_RING_BUFFER) += ade7758_ring.o ade7758_trigger.o
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obj-$(CONFIG_ADE7758) += ade7758.o
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@ -0,0 +1,171 @@
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#ifndef _ADE7758_H
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#define _ADE7758_H
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#define ADE7758_AWATTHR 0x01
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#define ADE7758_BWATTHR 0x02
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#define ADE7758_CWATTHR 0x03
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#define ADE7758_AVARHR 0x04
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#define ADE7758_BVARHR 0x05
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#define ADE7758_CVARHR 0x06
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#define ADE7758_AVAHR 0x07
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#define ADE7758_BVAHR 0x08
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#define ADE7758_CVAHR 0x09
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#define ADE7758_AIRMS 0x0A
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#define ADE7758_BIRMS 0x0B
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#define ADE7758_CIRMS 0x0C
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#define ADE7758_AVRMS 0x0D
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#define ADE7758_BVRMS 0x0E
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#define ADE7758_CVRMS 0x0F
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#define ADE7758_FREQ 0x10
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#define ADE7758_TEMP 0x11
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#define ADE7758_WFORM 0x12
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#define ADE7758_OPMODE 0x13
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#define ADE7758_MMODE 0x14
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#define ADE7758_WAVMODE 0x15
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#define ADE7758_COMPMODE 0x16
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#define ADE7758_LCYCMODE 0x17
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#define ADE7758_MASK 0x18
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#define ADE7758_STATUS 0x19
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#define ADE7758_RSTATUS 0x1A
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#define ADE7758_ZXTOUT 0x1B
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#define ADE7758_LINECYC 0x1C
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#define ADE7758_SAGCYC 0x1D
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#define ADE7758_SAGLVL 0x1E
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#define ADE7758_VPINTLVL 0x1F
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#define ADE7758_IPINTLVL 0x20
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#define ADE7758_VPEAK 0x21
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#define ADE7758_IPEAK 0x22
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#define ADE7758_GAIN 0x23
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#define ADE7758_AVRMSGAIN 0x24
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#define ADE7758_BVRMSGAIN 0x25
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#define ADE7758_CVRMSGAIN 0x26
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#define ADE7758_AIGAIN 0x27
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#define ADE7758_BIGAIN 0x28
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#define ADE7758_CIGAIN 0x29
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#define ADE7758_AWG 0x2A
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#define ADE7758_BWG 0x2B
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#define ADE7758_CWG 0x2C
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#define ADE7758_AVARG 0x2D
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#define ADE7758_BVARG 0x2E
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#define ADE7758_CVARG 0x2F
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#define ADE7758_AVAG 0x30
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#define ADE7758_BVAG 0x31
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#define ADE7758_CVAG 0x32
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#define ADE7758_AVRMSOS 0x33
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#define ADE7758_BVRMSOS 0x34
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#define ADE7758_CVRMSOS 0x35
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#define ADE7758_AIRMSOS 0x36
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#define ADE7758_BIRMSOS 0x37
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#define ADE7758_CIRMSOS 0x38
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#define ADE7758_AWAITOS 0x39
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#define ADE7758_BWAITOS 0x3A
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#define ADE7758_CWAITOS 0x3B
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#define ADE7758_AVAROS 0x3C
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#define ADE7758_BVAROS 0x3D
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#define ADE7758_CVAROS 0x3E
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#define ADE7758_APHCAL 0x3F
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#define ADE7758_BPHCAL 0x40
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#define ADE7758_CPHCAL 0x41
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#define ADE7758_WDIV 0x42
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#define ADE7758_VADIV 0x44
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#define ADE7758_VARDIV 0x43
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#define ADE7758_APCFNUM 0x45
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#define ADE7758_APCFDEN 0x46
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#define ADE7758_VARCFNUM 0x47
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#define ADE7758_VARCFDEN 0x48
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#define ADE7758_CHKSUM 0x7E
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#define ADE7758_VERSION 0x7F
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#define ADE7758_READ_REG(a) a
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#define ADE7758_WRITE_REG(a) ((a) | 0x80)
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#define ADE7758_MAX_TX 8
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#define ADE7758_MAX_RX 4
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#define ADE7758_STARTUP_DELAY 1
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#define ADE7758_SPI_SLOW (u32)(300 * 1000)
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#define ADE7758_SPI_BURST (u32)(1000 * 1000)
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#define ADE7758_SPI_FAST (u32)(2000 * 1000)
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#define DRIVER_NAME "ade7758"
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/**
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* struct ade7758_state - device instance specific data
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* @us: actual spi_device
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* @work_trigger_to_ring: bh for triggered event handling
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* @inter: used to check if new interrupt has been triggered
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* @last_timestamp: passing timestamp from th to bh of interrupt handler
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* @indio_dev: industrial I/O device structure
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* @trig: data ready trigger registered with iio
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* @tx: transmit buffer
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* @rx: recieve buffer
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* @buf_lock: mutex to protect tx and rx
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**/
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struct ade7758_state {
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struct spi_device *us;
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struct work_struct work_trigger_to_ring;
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s64 last_timestamp;
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struct iio_dev *indio_dev;
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struct iio_trigger *trig;
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u8 *tx;
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u8 *rx;
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struct mutex buf_lock;
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};
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#ifdef CONFIG_IIO_RING_BUFFER
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/* At the moment triggers are only used for ring buffer
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* filling. This may change!
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*/
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enum ade7758_scan {
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ADE7758_SCAN_WFORM,
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};
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void ade7758_remove_trigger(struct iio_dev *indio_dev);
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int ade7758_probe_trigger(struct iio_dev *indio_dev);
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ssize_t ade7758_read_data_from_ring(struct device *dev,
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struct device_attribute *attr,
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char *buf);
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int ade7758_configure_ring(struct iio_dev *indio_dev);
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void ade7758_unconfigure_ring(struct iio_dev *indio_dev);
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int ade7758_initialize_ring(struct iio_ring_buffer *ring);
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void ade7758_uninitialize_ring(struct iio_ring_buffer *ring);
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int ade7758_set_irq(struct device *dev, bool enable);
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#else /* CONFIG_IIO_RING_BUFFER */
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static inline void ade7758_remove_trigger(struct iio_dev *indio_dev)
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{
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}
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static inline int ade7758_probe_trigger(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline ssize_t
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ade7758_read_data_from_ring(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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return 0;
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}
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static int ade7758_configure_ring(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline void ade7758_unconfigure_ring(struct iio_dev *indio_dev)
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{
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}
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static inline int ade7758_initialize_ring(struct iio_ring_buffer *ring)
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{
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return 0;
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}
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static inline void ade7758_uninitialize_ring(struct iio_ring_buffer *ring)
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{
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}
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#endif /* CONFIG_IIO_RING_BUFFER */
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#endif
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@ -0,0 +1,866 @@
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/*
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* ADE7758 Polyphase Multifunction Energy Metering IC Driver
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*
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* Copyright 2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/spi/spi.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include <linux/list.h>
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#include "../iio.h"
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#include "../sysfs.h"
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#include "meter.h"
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#include "ade7758.h"
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int ade7758_spi_write_reg_8(struct device *dev,
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u8 reg_address,
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u8 val)
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{
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int ret;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADE7758_WRITE_REG(reg_address);
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st->tx[1] = val;
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ret = spi_write(st->us, st->tx, 2);
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static int ade7758_spi_write_reg_16(struct device *dev,
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u8 reg_address,
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u16 value)
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{
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int ret;
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struct spi_message msg;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
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struct spi_transfer xfers[] = {
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{
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.tx_buf = st->tx,
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.bits_per_word = 8,
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.len = 3,
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}
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};
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADE7758_WRITE_REG(reg_address);
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st->tx[1] = (value >> 8) & 0xFF;
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st->tx[2] = value & 0xFF;
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spi_message_init(&msg);
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spi_message_add_tail(xfers, &msg);
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ret = spi_sync(st->us, &msg);
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static int ade7758_spi_write_reg_24(struct device *dev,
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u8 reg_address,
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u32 value)
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{
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int ret;
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struct spi_message msg;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
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struct spi_transfer xfers[] = {
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{
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.tx_buf = st->tx,
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.bits_per_word = 8,
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.len = 4,
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}
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};
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADE7758_WRITE_REG(reg_address);
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st->tx[1] = (value >> 16) & 0xFF;
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st->tx[2] = (value >> 8) & 0xFF;
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st->tx[3] = value & 0xFF;
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spi_message_init(&msg);
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spi_message_add_tail(xfers, &msg);
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ret = spi_sync(st->us, &msg);
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static int ade7758_spi_read_reg_8(struct device *dev,
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u8 reg_address,
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u8 *val)
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{
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struct spi_message msg;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
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int ret;
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struct spi_transfer xfers[] = {
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{
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.tx_buf = st->tx,
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.rx_buf = st->rx,
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.bits_per_word = 8,
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.len = 2,
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},
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};
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADE7758_READ_REG(reg_address);
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st->tx[1] = 0;
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spi_message_init(&msg);
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spi_message_add_tail(xfers, &msg);
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ret = spi_sync(st->us, &msg);
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if (ret) {
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dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X",
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reg_address);
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goto error_ret;
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}
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*val = st->rx[1];
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error_ret:
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static int ade7758_spi_read_reg_16(struct device *dev,
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u8 reg_address,
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u16 *val)
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{
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struct spi_message msg;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
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int ret;
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struct spi_transfer xfers[] = {
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{
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.tx_buf = st->tx,
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.rx_buf = st->rx,
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.bits_per_word = 8,
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.len = 3,
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},
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};
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADE7758_READ_REG(reg_address);
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st->tx[1] = 0;
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st->tx[2] = 0;
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spi_message_init(&msg);
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spi_message_add_tail(xfers, &msg);
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ret = spi_sync(st->us, &msg);
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if (ret) {
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dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",
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reg_address);
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goto error_ret;
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}
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*val = (st->rx[1] << 8) | st->rx[2];
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error_ret:
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static int ade7758_spi_read_reg_24(struct device *dev,
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u8 reg_address,
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u32 *val)
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{
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struct spi_message msg;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
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int ret;
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struct spi_transfer xfers[] = {
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{
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.tx_buf = st->tx,
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.rx_buf = st->rx,
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.bits_per_word = 8,
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.len = 4,
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},
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};
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADE7758_READ_REG(reg_address);
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st->tx[1] = 0;
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st->tx[2] = 0;
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st->tx[3] = 0;
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spi_message_init(&msg);
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spi_message_add_tail(xfers, &msg);
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ret = spi_sync(st->us, &msg);
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if (ret) {
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dev_err(&st->us->dev, "problem when reading 24 bit register 0x%02X",
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reg_address);
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goto error_ret;
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}
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*val = (st->rx[1] << 16) | (st->rx[2] << 8) | st->rx[3];
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error_ret:
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static ssize_t ade7758_read_8bit(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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int ret;
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u8 val = 0;
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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ret = ade7758_spi_read_reg_8(dev, this_attr->address, &val);
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if (ret)
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return ret;
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return sprintf(buf, "%u\n", val);
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}
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static ssize_t ade7758_read_16bit(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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int ret;
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u16 val = 0;
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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ret = ade7758_spi_read_reg_16(dev, this_attr->address, &val);
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if (ret)
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return ret;
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return sprintf(buf, "%u\n", val);
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}
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static ssize_t ade7758_read_24bit(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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int ret;
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u32 val = 0;
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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ret = ade7758_spi_read_reg_24(dev, this_attr->address, &val);
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if (ret)
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||||
return ret;
|
||||
|
||||
return sprintf(buf, "%u\n", val & 0xFFFFFF);
|
||||
}
|
||||
|
||||
static ssize_t ade7758_write_8bit(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
||||
int ret;
|
||||
long val;
|
||||
|
||||
ret = strict_strtol(buf, 10, &val);
|
||||
if (ret)
|
||||
goto error_ret;
|
||||
ret = ade7758_spi_write_reg_8(dev, this_attr->address, val);
|
||||
|
||||
error_ret:
|
||||
return ret ? ret : len;
|
||||
}
|
||||
|
||||
static ssize_t ade7758_write_16bit(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
||||
int ret;
|
||||
long val;
|
||||
|
||||
ret = strict_strtol(buf, 10, &val);
|
||||
if (ret)
|
||||
goto error_ret;
|
||||
ret = ade7758_spi_write_reg_16(dev, this_attr->address, val);
|
||||
|
||||
error_ret:
|
||||
return ret ? ret : len;
|
||||
}
|
||||
|
||||
int ade7758_reset(struct device *dev)
|
||||
{
|
||||
int ret;
|
||||
u8 val;
|
||||
ade7758_spi_read_reg_8(dev,
|
||||
ADE7758_OPMODE,
|
||||
&val);
|
||||
val |= 1 << 6; /* Software Chip Reset */
|
||||
ret = ade7758_spi_write_reg_8(dev,
|
||||
ADE7758_OPMODE,
|
||||
val);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t ade7758_write_reset(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t len)
|
||||
{
|
||||
if (len < 1)
|
||||
return -1;
|
||||
switch (buf[0]) {
|
||||
case '1':
|
||||
case 'y':
|
||||
case 'Y':
|
||||
return ade7758_reset(dev);
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static IIO_DEV_ATTR_VPEAK(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_8bit,
|
||||
ade7758_write_8bit,
|
||||
ADE7758_VPEAK);
|
||||
static IIO_DEV_ATTR_IPEAK(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_8bit,
|
||||
ade7758_write_8bit,
|
||||
ADE7758_VPEAK);
|
||||
static IIO_DEV_ATTR_APHCAL(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_8bit,
|
||||
ade7758_write_8bit,
|
||||
ADE7758_APHCAL);
|
||||
static IIO_DEV_ATTR_BPHCAL(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_8bit,
|
||||
ade7758_write_8bit,
|
||||
ADE7758_BPHCAL);
|
||||
static IIO_DEV_ATTR_CPHCAL(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_8bit,
|
||||
ade7758_write_8bit,
|
||||
ADE7758_CPHCAL);
|
||||
static IIO_DEV_ATTR_WDIV(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_8bit,
|
||||
ade7758_write_8bit,
|
||||
ADE7758_WDIV);
|
||||
static IIO_DEV_ATTR_VADIV(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_8bit,
|
||||
ade7758_write_8bit,
|
||||
ADE7758_VADIV);
|
||||
static IIO_DEV_ATTR_AIRMS(S_IRUGO,
|
||||
ade7758_read_24bit,
|
||||
NULL,
|
||||
ADE7758_AIRMS);
|
||||
static IIO_DEV_ATTR_BIRMS(S_IRUGO,
|
||||
ade7758_read_24bit,
|
||||
NULL,
|
||||
ADE7758_BIRMS);
|
||||
static IIO_DEV_ATTR_CIRMS(S_IRUGO,
|
||||
ade7758_read_24bit,
|
||||
NULL,
|
||||
ADE7758_CIRMS);
|
||||
static IIO_DEV_ATTR_AVRMS(S_IRUGO,
|
||||
ade7758_read_24bit,
|
||||
NULL,
|
||||
ADE7758_AVRMS);
|
||||
static IIO_DEV_ATTR_BVRMS(S_IRUGO,
|
||||
ade7758_read_24bit,
|
||||
NULL,
|
||||
ADE7758_BVRMS);
|
||||
static IIO_DEV_ATTR_CVRMS(S_IRUGO,
|
||||
ade7758_read_24bit,
|
||||
NULL,
|
||||
ADE7758_CVRMS);
|
||||
static IIO_DEV_ATTR_AIRMSOS(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_AIRMSOS);
|
||||
static IIO_DEV_ATTR_BIRMSOS(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_BIRMSOS);
|
||||
static IIO_DEV_ATTR_CIRMSOS(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_CIRMSOS);
|
||||
static IIO_DEV_ATTR_AVRMSOS(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_AVRMSOS);
|
||||
static IIO_DEV_ATTR_BVRMSOS(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_BVRMSOS);
|
||||
static IIO_DEV_ATTR_CVRMSOS(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_CVRMSOS);
|
||||
static IIO_DEV_ATTR_AIGAIN(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_AIGAIN);
|
||||
static IIO_DEV_ATTR_BIGAIN(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_BIGAIN);
|
||||
static IIO_DEV_ATTR_CIGAIN(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_CIGAIN);
|
||||
static IIO_DEV_ATTR_AVRMSGAIN(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_AVRMSGAIN);
|
||||
static IIO_DEV_ATTR_BVRMSGAIN(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_BVRMSGAIN);
|
||||
static IIO_DEV_ATTR_CVRMSGAIN(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_16bit,
|
||||
ade7758_write_16bit,
|
||||
ADE7758_CVRMSGAIN);
|
||||
|
||||
int ade7758_set_irq(struct device *dev, bool enable)
|
||||
{
|
||||
int ret;
|
||||
u32 irqen;
|
||||
ret = ade7758_spi_read_reg_24(dev, ADE7758_MASK, &irqen);
|
||||
if (ret)
|
||||
goto error_ret;
|
||||
|
||||
if (enable)
|
||||
irqen |= 1 << 16; /* Enables an interrupt when a data is
|
||||
present in the waveform register */
|
||||
else
|
||||
irqen &= ~(1 << 16);
|
||||
|
||||
ret = ade7758_spi_write_reg_24(dev, ADE7758_MASK, irqen);
|
||||
if (ret)
|
||||
goto error_ret;
|
||||
|
||||
error_ret:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Power down the device */
|
||||
static int ade7758_stop_device(struct device *dev)
|
||||
{
|
||||
int ret;
|
||||
u8 val;
|
||||
ade7758_spi_read_reg_8(dev,
|
||||
ADE7758_OPMODE,
|
||||
&val);
|
||||
val |= 7 << 3; /* ADE7758 powered down */
|
||||
ret = ade7758_spi_write_reg_8(dev,
|
||||
ADE7758_OPMODE,
|
||||
val);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ade7758_initial_setup(struct ade7758_state *st)
|
||||
{
|
||||
int ret;
|
||||
struct device *dev = &st->indio_dev->dev;
|
||||
|
||||
/* use low spi speed for init */
|
||||
st->us->mode = SPI_MODE_3;
|
||||
spi_setup(st->us);
|
||||
|
||||
/* Disable IRQ */
|
||||
ret = ade7758_set_irq(dev, false);
|
||||
if (ret) {
|
||||
dev_err(dev, "disable irq failed");
|
||||
goto err_ret;
|
||||
}
|
||||
|
||||
ade7758_reset(dev);
|
||||
msleep(ADE7758_STARTUP_DELAY);
|
||||
|
||||
err_ret:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t ade7758_read_frequency(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
int ret, len = 0;
|
||||
u8 t;
|
||||
int sps;
|
||||
ret = ade7758_spi_read_reg_8(dev,
|
||||
ADE7758_WAVMODE,
|
||||
&t);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
t = (t >> 5) & 0x3;
|
||||
sps = 26040 / (1 << t);
|
||||
|
||||
len = sprintf(buf, "%d SPS\n", sps);
|
||||
return len;
|
||||
}
|
||||
|
||||
static ssize_t ade7758_write_frequency(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||
struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
|
||||
unsigned long val;
|
||||
int ret;
|
||||
u8 reg, t;
|
||||
|
||||
ret = strict_strtol(buf, 10, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
mutex_lock(&indio_dev->mlock);
|
||||
|
||||
t = (26040 / val);
|
||||
if (t > 0)
|
||||
t >>= 1;
|
||||
|
||||
if (t > 1)
|
||||
st->us->max_speed_hz = ADE7758_SPI_SLOW;
|
||||
else
|
||||
st->us->max_speed_hz = ADE7758_SPI_FAST;
|
||||
|
||||
ret = ade7758_spi_read_reg_8(dev,
|
||||
ADE7758_WAVMODE,
|
||||
®);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
reg &= ~(5 << 3);
|
||||
reg |= t << 5;
|
||||
|
||||
ret = ade7758_spi_write_reg_8(dev,
|
||||
ADE7758_WAVMODE,
|
||||
reg);
|
||||
|
||||
out:
|
||||
mutex_unlock(&indio_dev->mlock);
|
||||
|
||||
return ret ? ret : len;
|
||||
}
|
||||
|
||||
static ssize_t ade7758_read_waveform_type(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
int ret, len = 0;
|
||||
u8 t;
|
||||
ret = ade7758_spi_read_reg_8(dev,
|
||||
ADE7758_WAVMODE,
|
||||
&t);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
t = (t >> 2) & 0x7;
|
||||
|
||||
len = sprintf(buf, "%d\n", t);
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
static ssize_t ade7758_write_waveform_type(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||
unsigned long val;
|
||||
int ret;
|
||||
u8 reg;
|
||||
|
||||
ret = strict_strtol(buf, 10, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (val > 4)
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&indio_dev->mlock);
|
||||
|
||||
ret = ade7758_spi_read_reg_8(dev,
|
||||
ADE7758_WAVMODE,
|
||||
®);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
reg &= ~(7 << 2);
|
||||
reg |= val << 2;
|
||||
|
||||
ret = ade7758_spi_write_reg_8(dev,
|
||||
ADE7758_WAVMODE,
|
||||
reg);
|
||||
|
||||
out:
|
||||
mutex_unlock(&indio_dev->mlock);
|
||||
|
||||
return ret ? ret : len;
|
||||
}
|
||||
|
||||
static IIO_DEV_ATTR_TEMP_RAW(ade7758_read_8bit);
|
||||
static IIO_CONST_ATTR(temp_offset, "129 C");
|
||||
static IIO_CONST_ATTR(temp_scale, "4 C");
|
||||
|
||||
static IIO_DEV_ATTR_AWATTHR(ade7758_read_16bit,
|
||||
ADE7758_AWATTHR);
|
||||
static IIO_DEV_ATTR_BWATTHR(ade7758_read_16bit,
|
||||
ADE7758_BWATTHR);
|
||||
static IIO_DEV_ATTR_CWATTHR(ade7758_read_16bit,
|
||||
ADE7758_CWATTHR);
|
||||
static IIO_DEV_ATTR_AVARHR(ade7758_read_16bit,
|
||||
ADE7758_AVARHR);
|
||||
static IIO_DEV_ATTR_BVARHR(ade7758_read_16bit,
|
||||
ADE7758_BVARHR);
|
||||
static IIO_DEV_ATTR_CVARHR(ade7758_read_16bit,
|
||||
ADE7758_CVARHR);
|
||||
static IIO_DEV_ATTR_AVAHR(ade7758_read_16bit,
|
||||
ADE7758_AVAHR);
|
||||
static IIO_DEV_ATTR_BVAHR(ade7758_read_16bit,
|
||||
ADE7758_BVAHR);
|
||||
static IIO_DEV_ATTR_CVAHR(ade7758_read_16bit,
|
||||
ADE7758_CVAHR);
|
||||
|
||||
static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_frequency,
|
||||
ade7758_write_frequency);
|
||||
|
||||
/**
|
||||
* IIO_DEV_ATTR_WAVEFORM_TYPE - set the type of waveform.
|
||||
* @_mode: sysfs file mode/permissions
|
||||
* @_show: output method for the attribute
|
||||
* @_store: input method for the attribute
|
||||
**/
|
||||
#define IIO_DEV_ATTR_WAVEFORM_TYPE(_mode, _show, _store) \
|
||||
IIO_DEVICE_ATTR(waveform_type, _mode, _show, _store, 0)
|
||||
|
||||
static IIO_DEV_ATTR_WAVEFORM_TYPE(S_IWUSR | S_IRUGO,
|
||||
ade7758_read_waveform_type,
|
||||
ade7758_write_waveform_type);
|
||||
|
||||
static IIO_DEV_ATTR_RESET(ade7758_write_reset);
|
||||
|
||||
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26000 13000 65000 33000");
|
||||
|
||||
static IIO_CONST_ATTR(name, "ade7758");
|
||||
|
||||
static struct attribute *ade7758_event_attributes[] = {
|
||||
NULL
|
||||
};
|
||||
|
||||
static struct attribute_group ade7758_event_attribute_group = {
|
||||
.attrs = ade7758_event_attributes,
|
||||
};
|
||||
|
||||
static struct attribute *ade7758_attributes[] = {
|
||||
&iio_dev_attr_temp_raw.dev_attr.attr,
|
||||
&iio_const_attr_temp_offset.dev_attr.attr,
|
||||
&iio_const_attr_temp_scale.dev_attr.attr,
|
||||
&iio_dev_attr_sampling_frequency.dev_attr.attr,
|
||||
&iio_dev_attr_waveform_type.dev_attr.attr,
|
||||
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
|
||||
&iio_dev_attr_reset.dev_attr.attr,
|
||||
&iio_const_attr_name.dev_attr.attr,
|
||||
&iio_dev_attr_awatthr.dev_attr.attr,
|
||||
&iio_dev_attr_bwatthr.dev_attr.attr,
|
||||
&iio_dev_attr_cwatthr.dev_attr.attr,
|
||||
&iio_dev_attr_avarhr.dev_attr.attr,
|
||||
&iio_dev_attr_bvarhr.dev_attr.attr,
|
||||
&iio_dev_attr_cvarhr.dev_attr.attr,
|
||||
&iio_dev_attr_avahr.dev_attr.attr,
|
||||
&iio_dev_attr_bvahr.dev_attr.attr,
|
||||
&iio_dev_attr_cvahr.dev_attr.attr,
|
||||
&iio_dev_attr_vpeak.dev_attr.attr,
|
||||
&iio_dev_attr_ipeak.dev_attr.attr,
|
||||
&iio_dev_attr_aphcal.dev_attr.attr,
|
||||
&iio_dev_attr_bphcal.dev_attr.attr,
|
||||
&iio_dev_attr_cphcal.dev_attr.attr,
|
||||
&iio_dev_attr_wdiv.dev_attr.attr,
|
||||
&iio_dev_attr_vadiv.dev_attr.attr,
|
||||
&iio_dev_attr_airms.dev_attr.attr,
|
||||
&iio_dev_attr_birms.dev_attr.attr,
|
||||
&iio_dev_attr_cirms.dev_attr.attr,
|
||||
&iio_dev_attr_avrms.dev_attr.attr,
|
||||
&iio_dev_attr_bvrms.dev_attr.attr,
|
||||
&iio_dev_attr_cvrms.dev_attr.attr,
|
||||
&iio_dev_attr_aigain.dev_attr.attr,
|
||||
&iio_dev_attr_bigain.dev_attr.attr,
|
||||
&iio_dev_attr_cigain.dev_attr.attr,
|
||||
&iio_dev_attr_avrmsgain.dev_attr.attr,
|
||||
&iio_dev_attr_bvrmsgain.dev_attr.attr,
|
||||
&iio_dev_attr_cvrmsgain.dev_attr.attr,
|
||||
&iio_dev_attr_airmsos.dev_attr.attr,
|
||||
&iio_dev_attr_birmsos.dev_attr.attr,
|
||||
&iio_dev_attr_cirmsos.dev_attr.attr,
|
||||
&iio_dev_attr_avrmsos.dev_attr.attr,
|
||||
&iio_dev_attr_bvrmsos.dev_attr.attr,
|
||||
&iio_dev_attr_cvrmsos.dev_attr.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static const struct attribute_group ade7758_attribute_group = {
|
||||
.attrs = ade7758_attributes,
|
||||
};
|
||||
|
||||
|
||||
|
||||
static int __devinit ade7758_probe(struct spi_device *spi)
|
||||
{
|
||||
int ret, regdone = 0;
|
||||
struct ade7758_state *st = kzalloc(sizeof *st, GFP_KERNEL);
|
||||
if (!st) {
|
||||
ret = -ENOMEM;
|
||||
goto error_ret;
|
||||
}
|
||||
/* this is only used for removal purposes */
|
||||
spi_set_drvdata(spi, st);
|
||||
|
||||
/* Allocate the comms buffers */
|
||||
st->rx = kzalloc(sizeof(*st->rx)*ADE7758_MAX_RX, GFP_KERNEL);
|
||||
if (st->rx == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto error_free_st;
|
||||
}
|
||||
st->tx = kzalloc(sizeof(*st->tx)*ADE7758_MAX_TX, GFP_KERNEL);
|
||||
if (st->tx == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto error_free_rx;
|
||||
}
|
||||
st->us = spi;
|
||||
mutex_init(&st->buf_lock);
|
||||
/* setup the industrialio driver allocated elements */
|
||||
st->indio_dev = iio_allocate_device();
|
||||
if (st->indio_dev == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto error_free_tx;
|
||||
}
|
||||
|
||||
st->indio_dev->dev.parent = &spi->dev;
|
||||
st->indio_dev->num_interrupt_lines = 1;
|
||||
st->indio_dev->event_attrs = &ade7758_event_attribute_group;
|
||||
st->indio_dev->attrs = &ade7758_attribute_group;
|
||||
st->indio_dev->dev_data = (void *)(st);
|
||||
st->indio_dev->driver_module = THIS_MODULE;
|
||||
st->indio_dev->modes = INDIO_DIRECT_MODE;
|
||||
|
||||
ret = ade7758_configure_ring(st->indio_dev);
|
||||
if (ret)
|
||||
goto error_free_dev;
|
||||
|
||||
ret = iio_device_register(st->indio_dev);
|
||||
if (ret)
|
||||
goto error_unreg_ring_funcs;
|
||||
regdone = 1;
|
||||
|
||||
ret = ade7758_initialize_ring(st->indio_dev->ring);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "failed to initialize the ring\n");
|
||||
goto error_unreg_ring_funcs;
|
||||
}
|
||||
|
||||
if (spi->irq) {
|
||||
ret = iio_register_interrupt_line(spi->irq,
|
||||
st->indio_dev,
|
||||
0,
|
||||
IRQF_TRIGGER_FALLING,
|
||||
"ade7758");
|
||||
if (ret)
|
||||
goto error_uninitialize_ring;
|
||||
|
||||
ret = ade7758_probe_trigger(st->indio_dev);
|
||||
if (ret)
|
||||
goto error_unregister_line;
|
||||
}
|
||||
|
||||
/* Get the device into a sane initial state */
|
||||
ret = ade7758_initial_setup(st);
|
||||
if (ret)
|
||||
goto error_remove_trigger;
|
||||
return 0;
|
||||
|
||||
error_remove_trigger:
|
||||
if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
|
||||
ade7758_remove_trigger(st->indio_dev);
|
||||
error_unregister_line:
|
||||
if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
|
||||
iio_unregister_interrupt_line(st->indio_dev, 0);
|
||||
error_uninitialize_ring:
|
||||
ade7758_uninitialize_ring(st->indio_dev->ring);
|
||||
error_unreg_ring_funcs:
|
||||
ade7758_unconfigure_ring(st->indio_dev);
|
||||
error_free_dev:
|
||||
if (regdone)
|
||||
iio_device_unregister(st->indio_dev);
|
||||
else
|
||||
iio_free_device(st->indio_dev);
|
||||
error_free_tx:
|
||||
kfree(st->tx);
|
||||
error_free_rx:
|
||||
kfree(st->rx);
|
||||
error_free_st:
|
||||
kfree(st);
|
||||
error_ret:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ade7758_remove(struct spi_device *spi)
|
||||
{
|
||||
int ret;
|
||||
struct ade7758_state *st = spi_get_drvdata(spi);
|
||||
struct iio_dev *indio_dev = st->indio_dev;
|
||||
|
||||
ret = ade7758_stop_device(&(indio_dev->dev));
|
||||
if (ret)
|
||||
goto err_ret;
|
||||
|
||||
flush_scheduled_work();
|
||||
|
||||
ade7758_remove_trigger(indio_dev);
|
||||
if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
|
||||
iio_unregister_interrupt_line(indio_dev, 0);
|
||||
|
||||
ade7758_uninitialize_ring(indio_dev->ring);
|
||||
iio_device_unregister(indio_dev);
|
||||
ade7758_unconfigure_ring(indio_dev);
|
||||
kfree(st->tx);
|
||||
kfree(st->rx);
|
||||
kfree(st);
|
||||
|
||||
return 0;
|
||||
|
||||
err_ret:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct spi_driver ade7758_driver = {
|
||||
.driver = {
|
||||
.name = "ade7758",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = ade7758_probe,
|
||||
.remove = __devexit_p(ade7758_remove),
|
||||
};
|
||||
|
||||
static __init int ade7758_init(void)
|
||||
{
|
||||
return spi_register_driver(&ade7758_driver);
|
||||
}
|
||||
module_init(ade7758_init);
|
||||
|
||||
static __exit void ade7758_exit(void)
|
||||
{
|
||||
spi_unregister_driver(&ade7758_driver);
|
||||
}
|
||||
module_exit(ade7758_exit);
|
||||
|
||||
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
|
||||
MODULE_DESCRIPTION("Analog Devices ADE7758 Polyphase Multifunction Energy Metering IC Driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
@ -0,0 +1,212 @@
|
|||
#include <linux/interrupt.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/gpio.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/sysfs.h>
|
||||
#include <linux/list.h>
|
||||
|
||||
#include "../iio.h"
|
||||
#include "../sysfs.h"
|
||||
#include "../ring_sw.h"
|
||||
#include "../accel/accel.h"
|
||||
#include "../trigger.h"
|
||||
#include "ade7758.h"
|
||||
|
||||
/**
|
||||
* combine_8_to_32() utility function to munge to u8s into u32
|
||||
**/
|
||||
static inline u32 combine_8_to_32(u8 lower, u8 mid, u8 upper)
|
||||
{
|
||||
u32 _lower = lower;
|
||||
u32 _mid = mid;
|
||||
u32 _upper = upper;
|
||||
|
||||
return _lower | (_mid << 8) | (_upper << 16);
|
||||
}
|
||||
|
||||
static IIO_SCAN_EL_C(wform, ADE7758_SCAN_WFORM, ADE7758_WFORM, NULL);
|
||||
static IIO_CONST_ATTR_SCAN_EL_TYPE(wform, s, 24, 32);
|
||||
static IIO_SCAN_EL_TIMESTAMP(1);
|
||||
static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64);
|
||||
|
||||
static struct attribute *ade7758_scan_el_attrs[] = {
|
||||
&iio_scan_el_wform.dev_attr.attr,
|
||||
&iio_const_attr_wform_index.dev_attr.attr,
|
||||
&iio_const_attr_wform_type.dev_attr.attr,
|
||||
&iio_scan_el_timestamp.dev_attr.attr,
|
||||
&iio_const_attr_timestamp_index.dev_attr.attr,
|
||||
&iio_const_attr_timestamp_type.dev_attr.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct attribute_group ade7758_scan_el_group = {
|
||||
.attrs = ade7758_scan_el_attrs,
|
||||
.name = "scan_elements",
|
||||
};
|
||||
|
||||
/**
|
||||
* ade7758_poll_func_th() top half interrupt handler called by trigger
|
||||
* @private_data: iio_dev
|
||||
**/
|
||||
static void ade7758_poll_func_th(struct iio_dev *indio_dev, s64 time)
|
||||
{
|
||||
struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
|
||||
st->last_timestamp = time;
|
||||
schedule_work(&st->work_trigger_to_ring);
|
||||
/* Indicate that this interrupt is being handled */
|
||||
|
||||
/* Technically this is trigger related, but without this
|
||||
* handler running there is currently no way for the interrupt
|
||||
* to clear.
|
||||
*/
|
||||
}
|
||||
|
||||
/**
|
||||
* ade7758_spi_read_burst() - read all data registers
|
||||
* @dev: device associated with child of actual device (iio_dev or iio_trig)
|
||||
* @rx: somewhere to pass back the value read (min size is 24 bytes)
|
||||
**/
|
||||
static int ade7758_spi_read_burst(struct device *dev, u8 *rx)
|
||||
{
|
||||
struct spi_message msg;
|
||||
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||
struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
|
||||
int ret;
|
||||
|
||||
struct spi_transfer xfers[] = {
|
||||
{
|
||||
.tx_buf = st->tx,
|
||||
.rx_buf = rx,
|
||||
.bits_per_word = 8,
|
||||
.len = 4,
|
||||
}, {
|
||||
.tx_buf = st->tx + 4,
|
||||
.rx_buf = rx,
|
||||
.bits_per_word = 8,
|
||||
.len = 4,
|
||||
},
|
||||
};
|
||||
|
||||
mutex_lock(&st->buf_lock);
|
||||
st->tx[0] = ADE7758_READ_REG(ADE7758_RSTATUS);
|
||||
st->tx[1] = 0;
|
||||
st->tx[2] = 0;
|
||||
st->tx[3] = 0;
|
||||
st->tx[4] = ADE7758_READ_REG(ADE7758_WFORM);
|
||||
st->tx[5] = 0;
|
||||
st->tx[6] = 0;
|
||||
st->tx[7] = 0;
|
||||
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfers[0], &msg);
|
||||
spi_message_add_tail(&xfers[1], &msg);
|
||||
ret = spi_sync(st->us, &msg);
|
||||
if (ret)
|
||||
dev_err(&st->us->dev, "problem when reading WFORM value\n");
|
||||
|
||||
mutex_unlock(&st->buf_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
|
||||
* specific to be rolled into the core.
|
||||
*/
|
||||
static void ade7758_trigger_bh_to_ring(struct work_struct *work_s)
|
||||
{
|
||||
struct ade7758_state *st
|
||||
= container_of(work_s, struct ade7758_state,
|
||||
work_trigger_to_ring);
|
||||
struct iio_ring_buffer *ring = st->indio_dev->ring;
|
||||
|
||||
int i = 0;
|
||||
s32 *data;
|
||||
size_t datasize = ring->access.get_bytes_per_datum(ring);
|
||||
|
||||
data = kmalloc(datasize, GFP_KERNEL);
|
||||
if (data == NULL) {
|
||||
dev_err(&st->us->dev, "memory alloc failed in ring bh");
|
||||
return;
|
||||
}
|
||||
|
||||
if (ring->scan_count)
|
||||
if (ade7758_spi_read_burst(&st->indio_dev->dev, st->rx) >= 0)
|
||||
for (; i < ring->scan_count; i++)
|
||||
data[i] = combine_8_to_32(st->rx[i*2+2],
|
||||
st->rx[i*2+1],
|
||||
st->rx[i*2]);
|
||||
|
||||
/* Guaranteed to be aligned with 8 byte boundary */
|
||||
if (ring->scan_timestamp)
|
||||
*((s64 *)
|
||||
(((u32)data + 4 * ring->scan_count + 4) & ~0x7)) =
|
||||
st->last_timestamp;
|
||||
|
||||
ring->access.store_to(ring,
|
||||
(u8 *)data,
|
||||
st->last_timestamp);
|
||||
|
||||
iio_trigger_notify_done(st->indio_dev->trig);
|
||||
kfree(data);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
void ade7758_unconfigure_ring(struct iio_dev *indio_dev)
|
||||
{
|
||||
kfree(indio_dev->pollfunc);
|
||||
iio_sw_rb_free(indio_dev->ring);
|
||||
}
|
||||
|
||||
int ade7758_configure_ring(struct iio_dev *indio_dev)
|
||||
{
|
||||
int ret = 0;
|
||||
struct ade7758_state *st = indio_dev->dev_data;
|
||||
struct iio_ring_buffer *ring;
|
||||
INIT_WORK(&st->work_trigger_to_ring, ade7758_trigger_bh_to_ring);
|
||||
|
||||
ring = iio_sw_rb_allocate(indio_dev);
|
||||
if (!ring) {
|
||||
ret = -ENOMEM;
|
||||
return ret;
|
||||
}
|
||||
indio_dev->ring = ring;
|
||||
/* Effectively select the ring buffer implementation */
|
||||
iio_ring_sw_register_funcs(&ring->access);
|
||||
ring->bpe = 4;
|
||||
ring->scan_el_attrs = &ade7758_scan_el_group;
|
||||
ring->scan_timestamp = true;
|
||||
ring->preenable = &iio_sw_ring_preenable;
|
||||
ring->postenable = &iio_triggered_ring_postenable;
|
||||
ring->predisable = &iio_triggered_ring_predisable;
|
||||
ring->owner = THIS_MODULE;
|
||||
|
||||
/* Set default scan mode */
|
||||
iio_scan_mask_set(ring, iio_scan_el_wform.number);
|
||||
|
||||
ret = iio_alloc_pollfunc(indio_dev, NULL, &ade7758_poll_func_th);
|
||||
if (ret)
|
||||
goto error_iio_sw_rb_free;
|
||||
|
||||
indio_dev->modes |= INDIO_RING_TRIGGERED;
|
||||
return 0;
|
||||
|
||||
error_iio_sw_rb_free:
|
||||
iio_sw_rb_free(indio_dev->ring);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ade7758_initialize_ring(struct iio_ring_buffer *ring)
|
||||
{
|
||||
return iio_ring_buffer_register(ring, 0);
|
||||
}
|
||||
|
||||
void ade7758_uninitialize_ring(struct iio_ring_buffer *ring)
|
||||
{
|
||||
iio_ring_buffer_unregister(ring);
|
||||
}
|
||||
|
|
@ -0,0 +1,125 @@
|
|||
#include <linux/interrupt.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/sysfs.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/spi/spi.h>
|
||||
|
||||
#include "../iio.h"
|
||||
#include "../sysfs.h"
|
||||
#include "../trigger.h"
|
||||
#include "ade7758.h"
|
||||
|
||||
/**
|
||||
* ade7758_data_rdy_trig_poll() the event handler for the data rdy trig
|
||||
**/
|
||||
static int ade7758_data_rdy_trig_poll(struct iio_dev *dev_info,
|
||||
int index,
|
||||
s64 timestamp,
|
||||
int no_test)
|
||||
{
|
||||
struct ade7758_state *st = iio_dev_get_devdata(dev_info);
|
||||
struct iio_trigger *trig = st->trig;
|
||||
|
||||
iio_trigger_poll(trig, timestamp);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
IIO_EVENT_SH(data_rdy_trig, &ade7758_data_rdy_trig_poll);
|
||||
|
||||
static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
|
||||
|
||||
static struct attribute *ade7758_trigger_attrs[] = {
|
||||
&dev_attr_name.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static const struct attribute_group ade7758_trigger_attr_group = {
|
||||
.attrs = ade7758_trigger_attrs,
|
||||
};
|
||||
|
||||
/**
|
||||
* ade7758_data_rdy_trigger_set_state() set datardy interrupt state
|
||||
**/
|
||||
static int ade7758_data_rdy_trigger_set_state(struct iio_trigger *trig,
|
||||
bool state)
|
||||
{
|
||||
struct ade7758_state *st = trig->private_data;
|
||||
struct iio_dev *indio_dev = st->indio_dev;
|
||||
int ret = 0;
|
||||
|
||||
dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
|
||||
ret = ade7758_set_irq(&st->indio_dev->dev, state);
|
||||
if (state == false) {
|
||||
iio_remove_event_from_list(&iio_event_data_rdy_trig,
|
||||
&indio_dev->interrupts[0]
|
||||
->ev_list);
|
||||
/* possible quirk with handler currently worked around
|
||||
by ensuring the work queue is empty */
|
||||
flush_scheduled_work();
|
||||
} else {
|
||||
iio_add_event_to_list(&iio_event_data_rdy_trig,
|
||||
&indio_dev->interrupts[0]->ev_list);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* ade7758_trig_try_reen() try renabling irq for data rdy trigger
|
||||
* @trig: the datardy trigger
|
||||
**/
|
||||
static int ade7758_trig_try_reen(struct iio_trigger *trig)
|
||||
{
|
||||
struct ade7758_state *st = trig->private_data;
|
||||
enable_irq(st->us->irq);
|
||||
/* irq reenabled so success! */
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ade7758_probe_trigger(struct iio_dev *indio_dev)
|
||||
{
|
||||
int ret;
|
||||
struct ade7758_state *st = indio_dev->dev_data;
|
||||
|
||||
st->trig = iio_allocate_trigger();
|
||||
st->trig->name = kasprintf(GFP_KERNEL,
|
||||
"ade7758-dev%d",
|
||||
indio_dev->id);
|
||||
if (!st->trig->name) {
|
||||
ret = -ENOMEM;
|
||||
goto error_free_trig;
|
||||
}
|
||||
st->trig->dev.parent = &st->us->dev;
|
||||
st->trig->owner = THIS_MODULE;
|
||||
st->trig->private_data = st;
|
||||
st->trig->set_trigger_state = &ade7758_data_rdy_trigger_set_state;
|
||||
st->trig->try_reenable = &ade7758_trig_try_reen;
|
||||
st->trig->control_attrs = &ade7758_trigger_attr_group;
|
||||
ret = iio_trigger_register(st->trig);
|
||||
|
||||
/* select default trigger */
|
||||
indio_dev->trig = st->trig;
|
||||
if (ret)
|
||||
goto error_free_trig_name;
|
||||
|
||||
return 0;
|
||||
|
||||
error_free_trig_name:
|
||||
kfree(st->trig->name);
|
||||
error_free_trig:
|
||||
iio_free_trigger(st->trig);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void ade7758_remove_trigger(struct iio_dev *indio_dev)
|
||||
{
|
||||
struct ade7758_state *state = indio_dev->dev_data;
|
||||
|
||||
iio_trigger_unregister(state->trig);
|
||||
kfree(state->trig->name);
|
||||
iio_free_trigger(state->trig);
|
||||
}
|
||||
Loading…
Reference in New Issue