From ba1c2bb2cc29eada78a6d35488291892431918e5 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Wed, 27 Apr 2011 17:13:58 +0200 Subject: [PATCH] IIO: DAC: AD5791: Add support for the AD5760/AD5780 High Resolution DACs Add support for the AD5760/AD5780 High Resolution Voltage Output DACs Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/dac/Kconfig | 7 +++-- drivers/staging/iio/dac/ad5791.c | 54 ++++++++++++++++++++++---------- drivers/staging/iio/dac/ad5791.h | 9 +++++- 3 files changed, 50 insertions(+), 20 deletions(-) diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig index f25468a9f41a..d5a5556cf985 100644 --- a/drivers/staging/iio/dac/Kconfig +++ b/drivers/staging/iio/dac/Kconfig @@ -32,11 +32,12 @@ config AD5504 module will be called ad5504. config AD5791 - tristate "Analog Devices AD5781/AD5791 DAC SPI driver" + tristate "Analog Devices AD5760/AD5780/AD5781/AD5791 DAC SPI driver" depends on SPI help - Say yes here to build support for Analog Devices AD5781, AD5791, - High Resolution Voltage Output Digital to Analog Converter. + Say yes here to build support for Analog Devices AD5760, AD5780, + AD5781, AD5791 High Resolution Voltage Output Digital to + Analog Converter. To compile this driver as a module, choose M here: the module will be called ad5791. diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c index c4a258dfa776..acfd13bdecc1 100644 --- a/drivers/staging/iio/dac/ad5791.c +++ b/drivers/staging/iio/dac/ad5791.c @@ -1,5 +1,5 @@ /* - * AD5791, AD5791 Voltage Output Digital to Analog Converter + * AD5760, AD5780, AD5781, AD5791 Voltage Output Digital to Analog Converter * * Copyright 2011 Analog Devices Inc. * @@ -242,17 +242,6 @@ static const struct attribute_group ad5791_attribute_group = { .attrs = ad5791_attributes, }; -static const struct ad5791_chip_info ad5791_chip_info_tbl[] = { - [ID_AD5791] = { - .bits = 20, - .left_shift = 0, - }, - [ID_AD5781] = { - .bits = 18, - .left_shift = 2, - }, -}; - static int ad5791_get_lin_comp(unsigned int span) { if (span <= 10000) @@ -267,6 +256,37 @@ static int ad5791_get_lin_comp(unsigned int span) return AD5791_LINCOMP_19_20; } +static int ad5780_get_lin_comp(unsigned int span) +{ + if (span <= 10000) + return AD5780_LINCOMP_0_10; + else + return AD5780_LINCOMP_10_20; +} + +static const struct ad5791_chip_info ad5791_chip_info_tbl[] = { + [ID_AD5760] = { + .bits = 16, + .left_shift = 4, + .get_lin_comp = ad5780_get_lin_comp, + }, + [ID_AD5780] = { + .bits = 18, + .left_shift = 2, + .get_lin_comp = ad5780_get_lin_comp, + }, + [ID_AD5781] = { + .bits = 18, + .left_shift = 2, + .get_lin_comp = ad5791_get_lin_comp, + }, + [ID_AD5791] = { + .bits = 20, + .left_shift = 0, + .get_lin_comp = ad5791_get_lin_comp, + }, +}; + static int __devinit ad5791_probe(struct spi_device *spi) { struct ad5791_platform_data *pdata = spi->dev.platform_data; @@ -314,8 +334,8 @@ static int __devinit ad5791_probe(struct spi_device *spi) &ad5791_chip_info_tbl[spi_get_device_id(spi)->driver_data]; - st->ctrl = AD5761_CTRL_LINCOMP(ad5791_get_lin_comp(st->vref_mv)) | - ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) | + st->ctrl = AD5761_CTRL_LINCOMP(st->chip_info->get_lin_comp(st->vref_mv)) + | ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) | AD5791_CTRL_BIN2SC; ret = ad5791_spi_write(spi, AD5791_ADDR_CTRL, st->ctrl | @@ -386,8 +406,10 @@ static int __devexit ad5791_remove(struct spi_device *spi) } static const struct spi_device_id ad5791_id[] = { - {"ad5791", ID_AD5791}, + {"ad5760", ID_AD5760}, + {"ad5780", ID_AD5780}, {"ad5781", ID_AD5781}, + {"ad5791", ID_AD5791}, {} }; @@ -414,5 +436,5 @@ static __exit void ad5791_spi_exit(void) module_exit(ad5791_spi_exit); MODULE_AUTHOR("Michael Hennerich "); -MODULE_DESCRIPTION("Analog Devices AD5791/AD5781 DAC"); +MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5791 DAC"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5791.h b/drivers/staging/iio/dac/ad5791.h index 71c7d597f529..f09ad9a430c3 100644 --- a/drivers/staging/iio/dac/ad5791.h +++ b/drivers/staging/iio/dac/ad5791.h @@ -38,6 +38,9 @@ #define AD5791_LINCOMP_16_19 3 #define AD5791_LINCOMP_19_20 12 +#define AD5780_LINCOMP_0_10 0 +#define AD5780_LINCOMP_10_20 12 + /* Software Control Register */ #define AD5791_SWCTRL_LDAC (1 << 0) #define AD5791_SWCTRL_CLR (1 << 1) @@ -67,11 +70,13 @@ struct ad5791_platform_data { * struct ad5791_chip_info - chip specific information * @bits: accuracy of the DAC in bits * @left_shift: number of bits the datum must be shifted + * @get_lin_comp: function pointer to the device specific function */ struct ad5791_chip_info { u8 bits; u8 left_shift; + int (*get_lin_comp) (unsigned int span); }; /** @@ -102,8 +107,10 @@ struct ad5791_state { */ enum ad5791_supported_device_ids { - ID_AD5791, + ID_AD5760, + ID_AD5780, ID_AD5781, + ID_AD5791, }; #endif /* SPI_AD5791_H_ */ -- 2.39.2