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| author | Paul Cercueil <paul.cercueil@analog.com> | 2016-04-05 09:46:19 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-04-10 14:29:06 +0100 |
| commit | 56ca9db862bf3d78e279d424b3434d66617c27ae (patch) | |
| tree | 17bb8afecced84e47b38c468eae026d306090d95 /drivers/iio/dac/ad5592r-base.h | |
| parent | 5ea9274b8613f87120bfa6b0c0abc384c26cefb9 (diff) | |
| download | blackbird-obmc-linux-56ca9db862bf3d78e279d424b3434d66617c27ae.tar.gz blackbird-obmc-linux-56ca9db862bf3d78e279d424b3434d66617c27ae.zip | |
iio: dac: Add support for the AD5592R/AD5593R ADCs/DACs
This patch adds support for the AD5592R (spi) and AD5593R (i2c)
ADC/DAC/GPIO devices.
Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/dac/ad5592r-base.h')
| -rw-r--r-- | drivers/iio/dac/ad5592r-base.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/iio/dac/ad5592r-base.h b/drivers/iio/dac/ad5592r-base.h new file mode 100644 index 000000000000..841457e93f85 --- /dev/null +++ b/drivers/iio/dac/ad5592r-base.h @@ -0,0 +1,76 @@ +/* + * AD5592R / AD5593R Digital <-> Analog converters driver + * + * Copyright 2015-2016 Analog Devices Inc. + * Author: Paul Cercueil <paul.cercueil@analog.com> + * + * Licensed under the GPL-2. + */ + +#ifndef __DRIVERS_IIO_DAC_AD5592R_BASE_H__ +#define __DRIVERS_IIO_DAC_AD5592R_BASE_H__ + +#include <linux/types.h> +#include <linux/cache.h> +#include <linux/mutex.h> +#include <linux/gpio/driver.h> + +struct device; +struct ad5592r_state; + +enum ad5592r_registers { + AD5592R_REG_NOOP = 0x0, + AD5592R_REG_DAC_READBACK = 0x1, + AD5592R_REG_ADC_SEQ = 0x2, + AD5592R_REG_CTRL = 0x3, + AD5592R_REG_ADC_EN = 0x4, + AD5592R_REG_DAC_EN = 0x5, + AD5592R_REG_PULLDOWN = 0x6, + AD5592R_REG_LDAC = 0x7, + AD5592R_REG_GPIO_OUT_EN = 0x8, + AD5592R_REG_GPIO_SET = 0x9, + AD5592R_REG_GPIO_IN_EN = 0xA, + AD5592R_REG_PD = 0xB, + AD5592R_REG_OPEN_DRAIN = 0xC, + AD5592R_REG_TRISTATE = 0xD, + AD5592R_REG_RESET = 0xF, +}; + +#define AD5592R_REG_PD_EN_REF BIT(9) +#define AD5592R_REG_CTRL_ADC_RANGE BIT(5) +#define AD5592R_REG_CTRL_DAC_RANGE BIT(4) + +struct ad5592r_rw_ops { + int (*write_dac)(struct ad5592r_state *st, unsigned chan, u16 value); + int (*read_adc)(struct ad5592r_state *st, unsigned chan, u16 *value); + int (*reg_write)(struct ad5592r_state *st, u8 reg, u16 value); + int (*reg_read)(struct ad5592r_state *st, u8 reg, u16 *value); + int (*gpio_read)(struct ad5592r_state *st, u8 *value); +}; + +struct ad5592r_state { + struct device *dev; + struct regulator *reg; + struct gpio_chip gpiochip; + struct mutex gpio_lock; /* Protect cached gpio_out, gpio_val, etc. */ + unsigned int num_channels; + const struct ad5592r_rw_ops *ops; + int scale_avail[2][2]; + u16 cached_dac[8]; + u16 cached_gp_ctrl; + u8 channel_modes[8]; + u8 channel_offstate[8]; + u8 gpio_map; + u8 gpio_out; + u8 gpio_in; + u8 gpio_val; + + __be16 spi_msg ____cacheline_aligned; + __be16 spi_msg_nop; +}; + +int ad5592r_probe(struct device *dev, const char *name, + const struct ad5592r_rw_ops *ops); +int ad5592r_remove(struct device *dev); + +#endif /* __DRIVERS_IIO_DAC_AD5592R_BASE_H__ */ |
