> -----Original Message----- > From: Kim Seer Paller <kimseer.paller@xxxxxxxxxx> > Sent: Wednesday, June 19, 2024 2:49 PM > To: linux-kernel@xxxxxxxxxxxxxxx; linux-iio@xxxxxxxxxxxxxxx; > devicetree@xxxxxxxxxxxxxxx > Cc: Jonathan Cameron <jic23@xxxxxxxxxx>; David Lechner > <dlechner@xxxxxxxxxxxx>; Lars-Peter Clausen <lars@xxxxxxxxxx>; Liam > Girdwood <lgirdwood@xxxxxxxxx>; Mark Brown <broonie@xxxxxxxxxx>; > Dimitri Fedrau <dima.fedrau@xxxxxxxxx>; Krzysztof Kozlowski > <krzk+dt@xxxxxxxxxx>; Rob Herring <robh@xxxxxxxxxx>; Conor Dooley > <conor+dt@xxxxxxxxxx>; Hennerich, Michael > <Michael.Hennerich@xxxxxxxxxx>; Nuno Sá <noname.nuno@xxxxxxxxx>; > Paller, Kim Seer <KimSeer.Paller@xxxxxxxxxx> > Subject: [PATCH v4 5/5] iio: dac: ltc2664: Add driver for LTC2664 and LTC2672 > > LTC2664 4 channel, 12-/16-Bit Voltage Output SoftSpan DAC > LTC2672 5 channel, 12-/16-Bit Current Output Softspan DAC > > Co-developed-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > Signed-off-by: Kim Seer Paller <kimseer.paller@xxxxxxxxxx> > --- > MAINTAINERS | 1 + > drivers/iio/dac/Kconfig | 11 + > drivers/iio/dac/Makefile | 1 + > drivers/iio/dac/ltc2664.c | 755 ++++++++++++++++++++++++++++++++++++++ > 4 files changed, 768 insertions(+) > create mode 100644 drivers/iio/dac/ltc2664.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index f4a5b5bc8ccc..7a02d9a196fb 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -13082,6 +13082,7 @@ S: Supported > W: https://ez.analog.com/linux-software-drivers > F: Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml > F: Documentation/devicetree/bindings/iio/dac/adi,ltc2672.yaml > +F: drivers/iio/dac/ltc2664.c > > LTC2688 IIO DAC DRIVER > M: Nuno Sá <nuno.sa@xxxxxxxxxx> > diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index > fb48dddbcc20..3a7691db3998 100644 > --- a/drivers/iio/dac/Kconfig > +++ b/drivers/iio/dac/Kconfig > @@ -371,6 +371,17 @@ config LTC2632 > To compile this driver as a module, choose M here: the > module will be called ltc2632. > > +config LTC2664 > + tristate "Analog Devices LTC2664 and LTC2672 DAC SPI driver" > + depends on SPI > + select REGMAP > + help > + Say yes here to build support for Analog Devices > + LTC2664 and LTC2672 converters (DAC). > + > + To compile this driver as a module, choose M here: the > + module will be called ltc2664. > + > config M62332 > tristate "Mitsubishi M62332 DAC driver" > depends on I2C > diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index > 8432a81a19dc..2cf148f16306 100644 > --- a/drivers/iio/dac/Makefile > +++ b/drivers/iio/dac/Makefile > @@ -37,6 +37,7 @@ obj-$(CONFIG_DS4424) += ds4424.o > obj-$(CONFIG_LPC18XX_DAC) += lpc18xx_dac.o > obj-$(CONFIG_LTC1660) += ltc1660.o > obj-$(CONFIG_LTC2632) += ltc2632.o > +obj-$(CONFIG_LTC2664) += ltc2664.o > obj-$(CONFIG_LTC2688) += ltc2688.o > obj-$(CONFIG_M62332) += m62332.o > obj-$(CONFIG_MAX517) += max517.o > diff --git a/drivers/iio/dac/ltc2664.c b/drivers/iio/dac/ltc2664.c new file mode > 100644 index 000000000000..9b73b9c6a7a7 > --- /dev/null > +++ b/drivers/iio/dac/ltc2664.c > @@ -0,0 +1,755 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * LTC2664 4 channel, 12-/16-Bit Voltage Output SoftSpan DAC driver > + * LTC2672 5 channel, 12-/16-Bit Current Output Softspan DAC driver > + * > + * Copyright 2024 Analog Devices Inc. > + */ > + > +#include <linux/bitfield.h> > +#include <linux/cleanup.h> > +#include <linux/device.h> > +#include <linux/gpio/consumer.h> > +#include <linux/iio/iio.h> > +#include <linux/kernel.h> > +#include <linux/math64.h> > +#include <linux/module.h> > +#include <linux/mod_devicetable.h> > +#include <linux/mutex.h> > +#include <linux/property.h> > +#include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > +#include <linux/spi/spi.h> > + > +#define LTC2664_CMD_WRITE_N(n) (0x00 + (n)) > +#define LTC2664_CMD_UPDATE_N(n) (0x10 + (n)) > +#define LTC2664_CMD_WRITE_N_UPDATE_ALL 0x20 > +#define LTC2664_CMD_WRITE_N_UPDATE_N(n) (0x30 + (n)) > +#define LTC2664_CMD_POWER_DOWN_N(n) (0x40 + (n)) > +#define LTC2664_CMD_POWER_DOWN_ALL 0x50 > +#define LTC2664_CMD_SPAN_N(n) (0x60 + (n)) > +#define LTC2664_CMD_CONFIG 0x70 > +#define LTC2664_CMD_MUX 0xB0 > +#define LTC2664_CMD_TOGGLE_SEL 0xC0 > +#define LTC2664_CMD_GLOBAL_TOGGLE 0xD0 > +#define LTC2664_CMD_NO_OPERATION 0xF0 > +#define LTC2664_REF_DISABLE 0x0001 > +#define LTC2664_MSPAN_SOFTSPAN 7 > + > +#define LTC2672_MAX_CHANNEL 5 > +#define LTC2672_MAX_SPAN 7 > +#define LTC2672_SCALE_MULTIPLIER(n) (50 * BIT(n)) > + > +enum ltc2664_ids { > + LTC2664, > + LTC2672, > +}; > + > +enum { > + LTC2664_SPAN_RANGE_0V_5V, > + LTC2664_SPAN_RANGE_0V_10V, > + LTC2664_SPAN_RANGE_M5V_5V, > + LTC2664_SPAN_RANGE_M10V_10V, > + LTC2664_SPAN_RANGE_M2V5_2V5, > +}; > + > +enum { > + LTC2664_INPUT_A, > + LTC2664_INPUT_B, > + LTC2664_INPUT_B_AVAIL, > + LTC2664_POWERDOWN, > + LTC2664_POWERDOWN_MODE, > + LTC2664_TOGGLE_EN, > + LTC2664_GLOBAL_TOGGLE, > +}; > + > +static const u16 ltc2664_mspan_lut[8][2] = { > + { LTC2664_SPAN_RANGE_M10V_10V, 32768 }, /* MPS2=0, MPS1=0, > MSP0=0 (0)*/ > + { LTC2664_SPAN_RANGE_M5V_5V, 32768 }, /* MPS2=0, MPS1=0, > MSP0=1 (1)*/ > + { LTC2664_SPAN_RANGE_M2V5_2V5, 32768 }, /* MPS2=0, MPS1=1, > MSP0=0 (2)*/ > + { LTC2664_SPAN_RANGE_0V_10V, 0 }, /* MPS2=0, MPS1=1, MSP0=1 > (3)*/ > + { LTC2664_SPAN_RANGE_0V_10V, 32768 }, /* MPS2=1, MPS1=0, > MSP0=0 (4)*/ > + { LTC2664_SPAN_RANGE_0V_5V, 0 }, /* MPS2=1, MPS1=0, MSP0=1 > (5)*/ > + { LTC2664_SPAN_RANGE_0V_5V, 32768 }, /* MPS2=1, MPS1=1, > MSP0=0 (6)*/ > + { LTC2664_SPAN_RANGE_0V_5V, 0 } /* MPS2=1, MPS1=1, MSP0=1 > (7)*/ }; > + > +struct ltc2664_state; > + > +struct ltc2664_chip_info { > + enum ltc2664_ids id; Apologies for the oversight, forgot to remove both the id field and the corresponding enum id. > + const char *name; > + int (*scale_get)(const struct ltc2664_state *st, int c); > + int (*offset_get)(const struct ltc2664_state *st, int c); > + int measurement_type; > + unsigned int num_channels; > + const struct iio_chan_spec *iio_chan; > + const int (*span_helper)[2]; > + unsigned int num_span; > + unsigned int internal_vref_mv; > + bool manual_span_support; > + bool rfsadj_support;
