-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
staging: IIO: ADC: New driver for AD7606/AD7606-6/AD7606-4
This patch adds support for the: AD7606/AD7606-6/AD7606-4 8/6/4-Channel Data Acquisition system (DAS) with 16-Bit, Bipolar, Simultaneous Sampling ADC. Changes since V1: IIO: ADC: New driver for AD7606/AD7606-6/AD7606-4: Apply review feedback Rename sysfs node oversampling to oversampling_ratio. Kconfig: Add GPIOLIB dependency. Use range in mV to better match HWMON. Rename ad7606_check_oversampling. Fix various comments and style. Reorder is_visible cases. Use new gpio_request_one/array and friends. Drop check for SPI max_speed_hz. Changes since V2: IIO: ADC: New driver for AD7606/AD7606-6/AD7606-4: Apply review feedback Documentation: specify unit Avoid raise condition in ad7606_scan_direct() Check return value of bus ops read_block() Changes since V3: IIO: ADC: New driver for AD7606/AD7606-6/AD7606-4: Add missing include file Add linux/sched.h Changes since V4: IIO: ADC: New driver for AD7606/AD7606-6/AD7606-4: Fix kconfig declaration consistently use tristate to avoid configuration mismatches Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
- Loading branch information
Michael Hennerich
authored and
Greg Kroah-Hartman
committed
Feb 23, 2011
1 parent
363907a
commit b9618c0
Showing
8 changed files
with
1,312 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| /* | ||
| * AD7606 ADC driver | ||
| * | ||
| * Copyright 2011 Analog Devices Inc. | ||
| * | ||
| * Licensed under the GPL-2. | ||
| */ | ||
|
|
||
| #ifndef IIO_ADC_AD7606_H_ | ||
| #define IIO_ADC_AD7606_H_ | ||
|
|
||
| /* | ||
| * TODO: struct ad7606_platform_data needs to go into include/linux/iio | ||
| */ | ||
|
|
||
| /** | ||
| * struct ad7606_platform_data - platform/board specifc information | ||
| * @default_os: default oversampling value {0, 2, 4, 8, 16, 32, 64} | ||
| * @default_range: default range +/-{5000, 10000} mVolt | ||
| * @gpio_convst: number of gpio connected to the CONVST pin | ||
| * @gpio_reset: gpio connected to the RESET pin, if not used set to -1 | ||
| * @gpio_range: gpio connected to the RANGE pin, if not used set to -1 | ||
| * @gpio_os0: gpio connected to the OS0 pin, if not used set to -1 | ||
| * @gpio_os1: gpio connected to the OS1 pin, if not used set to -1 | ||
| * @gpio_os2: gpio connected to the OS2 pin, if not used set to -1 | ||
| * @gpio_frstdata: gpio connected to the FRSTDAT pin, if not used set to -1 | ||
| * @gpio_stby: gpio connected to the STBY pin, if not used set to -1 | ||
| */ | ||
|
|
||
| struct ad7606_platform_data { | ||
| unsigned default_os; | ||
| unsigned default_range; | ||
| unsigned gpio_convst; | ||
| unsigned gpio_reset; | ||
| unsigned gpio_range; | ||
| unsigned gpio_os0; | ||
| unsigned gpio_os1; | ||
| unsigned gpio_os2; | ||
| unsigned gpio_frstdata; | ||
| unsigned gpio_stby; | ||
| }; | ||
|
|
||
| /** | ||
| * struct ad7606_chip_info - chip specifc information | ||
| * @name: indentification string for chip | ||
| * @bits: accuracy of the adc in bits | ||
| * @bits: output coding [s]igned or [u]nsigned | ||
| * @int_vref_mv: the internal reference voltage | ||
| * @num_channels: number of physical inputs on chip | ||
| */ | ||
|
|
||
| struct ad7606_chip_info { | ||
| char name[10]; | ||
| u8 bits; | ||
| char sign; | ||
| u16 int_vref_mv; | ||
| unsigned num_channels; | ||
| }; | ||
|
|
||
| /** | ||
| * struct ad7606_state - driver instance specific data | ||
| */ | ||
|
|
||
| struct ad7606_state { | ||
| struct iio_dev *indio_dev; | ||
| struct device *dev; | ||
| const struct ad7606_chip_info *chip_info; | ||
| struct ad7606_platform_data *pdata; | ||
| struct regulator *reg; | ||
| struct work_struct poll_work; | ||
| wait_queue_head_t wq_data_avail; | ||
| atomic_t protect_ring; | ||
| size_t d_size; | ||
| const struct ad7606_bus_ops *bops; | ||
| int irq; | ||
| unsigned id; | ||
| unsigned range; | ||
| unsigned oversampling; | ||
| bool done; | ||
| bool have_frstdata; | ||
| bool have_os; | ||
| bool have_stby; | ||
| bool have_reset; | ||
| bool have_range; | ||
| void __iomem *base_address; | ||
|
|
||
| /* | ||
| * DMA (thus cache coherency maintenance) requires the | ||
| * transfer buffers to live in their own cache lines. | ||
| */ | ||
|
|
||
| unsigned short data[8] ____cacheline_aligned; | ||
| }; | ||
|
|
||
| struct ad7606_bus_ops { | ||
| /* more methods added in future? */ | ||
| int (*read_block)(struct device *, int, void *); | ||
| }; | ||
|
|
||
| void ad7606_suspend(struct ad7606_state *st); | ||
| void ad7606_resume(struct ad7606_state *st); | ||
| struct ad7606_state *ad7606_probe(struct device *dev, int irq, | ||
| void __iomem *base_address, unsigned id, | ||
| const struct ad7606_bus_ops *bops); | ||
| int ad7606_remove(struct ad7606_state *st); | ||
| int ad7606_reset(struct ad7606_state *st); | ||
|
|
||
| enum ad7606_supported_device_ids { | ||
| ID_AD7606_8, | ||
| ID_AD7606_6, | ||
| ID_AD7606_4 | ||
| }; | ||
|
|
||
| int ad7606_scan_from_ring(struct ad7606_state *st, unsigned ch); | ||
| int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev); | ||
| void ad7606_ring_cleanup(struct iio_dev *indio_dev); | ||
| #endif /* IIO_ADC_AD7606_H_ */ |
Oops, something went wrong.