On 02 12月 21 13:01:38, Antoniu Miclaus wrote: > The AD7293 is a Power Amplifier drain current controller > containing functionality for general-purpose monitoring > and control of current, voltage, and temperature, integrated > into a single chip solution with an SPI-compatible interface. > > Datasheet: > https://www.analog.com/media/en/technical-documentation/data-sheets/AD7293.pdf > Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> > --- > changes in v5: > - perform error check for `regulator_get_voltage` > - more characters per line adjustments > drivers/iio/dac/Kconfig | 11 + > drivers/iio/dac/Makefile | 1 + > drivers/iio/dac/ad7293.c | 909 +++++++++++++++++++++++++++++++++++++++ > 3 files changed, 921 insertions(+) > create mode 100644 drivers/iio/dac/ad7293.c > > diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig > index 75e1f2b48638..6206b90fc08f 100644 > --- a/drivers/iio/dac/Kconfig > +++ b/drivers/iio/dac/Kconfig > @@ -221,6 +221,17 @@ config AD5791 > To compile this driver as a module, choose M here: the > module will be called ad5791. > > +config AD7293 > + tristate "Analog Devices AD7293 Power Amplifier Current Controller" > + depends on SPI > + help > + Say yes here to build support for Analog Devices AD7293 > + Power Amplifier Current Controller with > + ADC, DACs, and Temperature and Current Sensors > + > + To compile this driver as a module, choose M here: the > + module will be called ad7293. > + > config AD7303 > tristate "Analog Devices AD7303 DAC driver" > depends on SPI > diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile > index 33e16f14902a..3c17246ee89b 100644 > --- a/drivers/iio/dac/Makefile > +++ b/drivers/iio/dac/Makefile > @@ -25,6 +25,7 @@ obj-$(CONFIG_AD5791) += ad5791.o > obj-$(CONFIG_AD5686) += ad5686.o > obj-$(CONFIG_AD5686_SPI) += ad5686-spi.o > obj-$(CONFIG_AD5696_I2C) += ad5696-i2c.o > +obj-$(CONFIG_AD7293) += ad7293.o > obj-$(CONFIG_AD7303) += ad7303.o > obj-$(CONFIG_AD8801) += ad8801.o > obj-$(CONFIG_CIO_DAC) += cio-dac.o > diff --git a/drivers/iio/dac/ad7293.c b/drivers/iio/dac/ad7293.c > new file mode 100644 > index 000000000000..b5770ff03258 > --- /dev/null > +++ b/drivers/iio/dac/ad7293.c > @@ -0,0 +1,909 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * AD7293 driver > + * > + * Copyright 2021 Analog Devices Inc. > + */ > + > +#include <linux/bitfield.h> > +#include <linux/bits.h> > +#include <linux/delay.h> > +#include <linux/device.h> > +#include <linux/gpio/consumer.h> > +#include <linux/iio/iio.h> > +#include <linux/mod_devicetable.h> > +#include <linux/module.h> > +#include <linux/regulator/consumer.h> > +#include <linux/spi/spi.h> > + > +#include <asm/unaligned.h> > + > +#define AD7293_R1B BIT(16) > +#define AD7293_R2B BIT(17) > +#define AD7293_PAGE_ADDR_MSK GENMASK(15, 8) > +#define AD7293_PAGE(x) FIELD_PREP(AD7293_PAGE_ADDR_MSK, x) > + > +/* AD7293 Register Map Common */ > +#define AD7293_REG_NO_OP (AD7293_R1B | AD7293_PAGE(0x0) | 0x0) remove unused register macro, like this. > +#define AD7293_REG_PAGE_SELECT (AD7293_R1B | AD7293_PAGE(0x0) | 0x1) > +#define AD7293_REG_CONV_CMD (AD7293_R2B | AD7293_PAGE(0x0) | 0x2) > +#define AD7293_REG_RESULT (AD7293_R1B | AD7293_PAGE(0x0) | 0x3) > +#define AD7293_REG_DAC_EN (AD7293_R1B | AD7293_PAGE(0x0) | 0x4) > +#define AD7293_REG_DEVICE_ID (AD7293_R2B | AD7293_PAGE(0x0) | 0xC) > +#define AD7293_REG_SOFT_RESET (AD7293_R2B | AD7293_PAGE(0x0) | 0xF) > + > +/* AD7293 Register Map Page 0x0 */ > +#define AD7293_REG_VIN0 (AD7293_R2B | AD7293_PAGE(0x0) | 0x10) > +#define AD7293_REG_VIN1 (AD7293_R2B | AD7293_PAGE(0x0) | 0x11) > +#define AD7293_REG_VIN2 (AD7293_R2B | AD7293_PAGE(0x0) | 0x12) > +#define AD7293_REG_VIN3 (AD7293_R2B | AD7293_PAGE(0x0) | 0x13) > +#define AD7293_REG_TSENSE_INT (AD7293_R2B | AD7293_PAGE(0x0) | 0x20) > +#define AD7293_REG_TSENSE_D0 (AD7293_R2B | AD7293_PAGE(0x0) | 0x21) > +#define AD7293_REG_TSENSE_D1 (AD7293_R2B | AD7293_PAGE(0x0) | 0x22) > +#define AD7293_REG_ISENSE_0 (AD7293_R2B | AD7293_PAGE(0x0) | 0x28) > +#define AD7293_REG_ISENSE_1 (AD7293_R2B | AD7293_PAGE(0x0) | 0x29) > +#define AD7293_REG_ISENSE_2 (AD7293_R2B | AD7293_PAGE(0x0) | 0x2A) > +#define AD7293_REG_ISENSE_3 (AD7293_R2B | AD7293_PAGE(0x0) | 0x2B) > +#define AD7293_REG_UNI_VOUT0 (AD7293_R2B | AD7293_PAGE(0x0) | 0x30) > +#define AD7293_REG_UNI_VOUT1 (AD7293_R2B | AD7293_PAGE(0x0) | 0x31) > +#define AD7293_REG_UNI_VOUT2 (AD7293_R2B | AD7293_PAGE(0x0) | 0x32) > +#define AD7293_REG_UNI_VOUT3 (AD7293_R2B | AD7293_PAGE(0x0) | 0x33) > +#define AD7293_REG_BI_VOUT0 (AD7293_R2B | AD7293_PAGE(0x0) | 0x34) > +#define AD7293_REG_BI_VOUT1 (AD7293_R2B | AD7293_PAGE(0x0) | 0x35) > +#define AD7293_REG_BI_VOUT2 (AD7293_R2B | AD7293_PAGE(0x0) | 0x36) > +#define AD7293_REG_BI_VOUT3 (AD7293_R2B | AD7293_PAGE(0x0) | 0x37) > + > +/* AD7293 Register Map Page 0x1 */ > +#define AD7293_REG_AVDD (AD7293_R2B | AD7293_PAGE(0x1) | 0x10) > +#define AD7293_REG_DACVDD_UNI (AD7293_R2B | AD7293_PAGE(0x1) | 0x11) > +#define AD7293_REG_DACVDD_BI (AD7293_R2B | AD7293_PAGE(0x1) | 0x12) > +#define AD7293_REG_AVSS (AD7293_R2B | AD7293_PAGE(0x1) | 0x13) > +#define AD7293_REG_BI_VOUT0_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x14) > +#define AD7293_REG_BI_VIOU1_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x15) > +#define AD7293_REG_BI_VOUT2_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x16) > +#define AD7293_REG_BI_VOUT3_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x17) > +#define AD7293_REG_RS0_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x28) the same here, not need to define all registers in the datasheet. Thanks, Cai > +#define AD7293_REG_RS1_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x29) > +#define AD7293_REG_RS2_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x2A) > +#define AD7293_REG_RS3_MON (AD7293_R2B | AD7293_PAGE(0x1) | 0x2B) > + > +/* AD7293 Register Map Page 0x2 */ > +#define AD7293_REG_DIGITAL_OUT_EN (AD7293_R2B | AD7293_PAGE(0x2) | 0x11) > +#define AD7293_REG_DIGITAL_INOUT_FUNC (AD7293_R2B | AD7293_PAGE(0x2) | 0x12) > +#define AD7293_REG_DIGITAL_FUNC_POL (AD7293_R2B | AD7293_PAGE(0x2) | 0x13) > +#define AD7293_REG_GENERAL (AD7293_R2B | AD7293_PAGE(0x2) | 0x14) > +#define AD7293_REG_VINX_RANGE0 (AD7293_R2B | AD7293_PAGE(0x2) | 0x15) > +#define AD7293_REG_VINX_RANGE1 (AD7293_R2B | AD7293_PAGE(0x2) | 0x16) > +#define AD7293_REG_VINX_DIFF_SE (AD7293_R2B | AD7293_PAGE(0x2) | 0x17) > +#define AD7293_REG_VINX_FILTER (AD7293_R2B | AD7293_PAGE(0x2) | 0x18) > +#define AD7293_REG_BG_EN (AD7293_R2B | AD7293_PAGE(0x2) | 0x19) > +#define AD7293_REG_CONV_DELAY (AD7293_R2B | AD7293_PAGE(0x2) | 0x1A) > +#define AD7293_REG_TSENSE_BG_EN (AD7293_R2B | AD7293_PAGE(0x2) | 0x1B) > +#define AD7293_REG_ISENSE_BG_EN (AD7293_R2B | AD7293_PAGE(0x2) | 0x1C) > +#define AD7293_REG_ISENSE_GAIN (AD7293_R2B | AD7293_PAGE(0x2) | 0x1D) > +#define AD7293_REG_DAC_SNOOZE_O (AD7293_R2B | AD7293_PAGE(0x2) | 0x1F) > +#define AD7293_REG_DAC_SNOOZE_1 (AD7293_R2B | AD7293_PAGE(0x2) | 0x20) > +#define AD7293_REG_RSX_MON_BG_EN (AD7293_R2B | AD7293_PAGE(0x2) | 0x23) > +#define AD7293_REG_INTEGR_CL (AD7293_R2B | AD7293_PAGE(0x2) | 0x28) > +#define AD7293_REG_PA_ON_CTRL (AD7293_R2B | AD7293_PAGE(0x2) | 0x29) > +#define AD7293_REG_RAMP_TIME_0 (AD7293_R2B | AD7293_PAGE(0x2) | 0x2A) > +#define AD7293_REG_RAMP_TIME_1 (AD7293_R2B | AD7293_PAGE(0x2) | 0x2B) > +#define AD7293_REG_RAMP_TIME_2 (AD7293_R2B | AD7293_PAGE(0x2) | 0x2C) > +#define AD7293_REG_RAMP_TIME_3 (AD7293_R2B | AD7293_PAGE(0x2) | 0x2D) > +#define AD7293_REG_CL_FR_IT (AD7293_R2B | AD7293_PAGE(0x2) | 0x2E) > +#define AD7293_REG_INTX_AVSS_AVDD (AD7293_R2B | AD7293_PAGE(0x2) | 0x2F) > + > +/* AD7293 Register Map Page 0x3 */ > +#define AD7293_REG_VINX_SEQ (AD7293_R2B | AD7293_PAGE(0x3) | 0x10) > +#define AD7293_REG_ISENSEX_TSENSEX_SEQ (AD7293_R2B | AD7293_PAGE(0x3) | 0x11) > +#define AD7293_REG_RSX_MON_BI_VOUTX_SEQ (AD7293_R2B | AD7293_PAGE(0x3) | 0x12) > + > +/* AD7293 Register Map Page 0xE */ > +#define AD7293_REG_VIN0_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x10) > +#define AD7293_REG_VIN1_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x11) > +#define AD7293_REG_VIN2_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x12) > +#define AD7293_REG_VIN3_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x13) > +#define AD7293_REG_TSENSE_INT_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x20) > +#define AD7293_REG_TSENSE_D0_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x21) > +#define AD7293_REG_TSENSE_D1_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x22) > +#define AD7293_REG_ISENSE0_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x28) > +#define AD7293_REG_ISENSE1_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x29) > +#define AD7293_REG_ISENSE2_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x2A) > +#define AD7293_REG_ISENSE3_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x2B) > +#define AD7293_REG_UNI_VOUT0_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x30) > +#define AD7293_REG_UNI_VOUT1_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x31) > +#define AD7293_REG_UNI_VOUT2_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x32) > +#define AD7293_REG_UNI_VOUT3_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x33) > +#define AD7293_REG_BI_VOUT0_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x34) > +#define AD7293_REG_BI_VOUT1_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x35) > +#define AD7293_REG_BI_VOUT2_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x36) > +#define AD7293_REG_BI_VOUT3_OFFSET (AD7293_R1B | AD7293_PAGE(0xE) | 0x37) > + > +/* AD7293 Miscellaneous Definitions */ > +#define AD7293_READ BIT(7) > +#define AD7293_TRANSF_LEN_MSK GENMASK(17, 16) > + > +#define AD7293_REG_ADDR_MSK GENMASK(7, 0) > +#define AD7293_REG_VOUT_OFFSET_MSK GENMASK(5, 4) > +#define AD7293_REG_DATA_RAW_MSK GENMASK(15, 4) > +#define AD7293_REG_VINX_RANGE_GET_CH_MSK(x, ch) (((x) >> (ch)) & 0x1) > +#define AD7293_REG_VINX_RANGE_SET_CH_MSK(x, ch) (((x) & 0x1) << (ch)) > +#define AD7293_CHIP_ID 0x18 > + > +enum ad7293_ch_type { > + AD7293_ADC_VINX, > + AD7293_ADC_TSENSE, > + AD7293_ADC_ISENSE, > + AD7293_DAC, > +}; > + > +enum ad7293_max_offset { > + AD7293_TSENSE_MIN_OFFSET_CH = 4, > + AD7293_ISENSE_MIN_OFFSET_CH = 7, > + AD7293_VOUT_MIN_OFFSET_CH = 11, > + AD7293_VOUT_MAX_OFFSET_CH = 18, > +}; > + > +static const int dac_offset_table[] = {0, 1, 2}; > + > +static const int isense_gain_table[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; > + > +static const int adc_range_table[] = {0, 1, 2, 3}; > + > +struct ad7293_state { > + struct spi_device *spi; > + /* Protect against concurrent accesses to the device, page selection and data content */ > + struct mutex lock; > + struct gpio_desc *gpio_reset; > + struct regulator *reg_avdd; > + struct regulator *reg_vdrive; > + u8 page_select; > + u8 data[3] ____cacheline_aligned; > +}; > + > +static int ad7293_page_select(struct ad7293_state *st, unsigned int reg) > +{ > + int ret; > + > + if (st->page_select != FIELD_GET(AD7293_PAGE_ADDR_MSK, reg)) { > + st->data[0] = FIELD_GET(AD7293_REG_ADDR_MSK, AD7293_REG_PAGE_SELECT); > + st->data[1] = FIELD_GET(AD7293_PAGE_ADDR_MSK, reg); > + > + ret = spi_write(st->spi, &st->data[0], 2); > + if (ret) > + return ret; > + > + st->page_select = FIELD_GET(AD7293_PAGE_ADDR_MSK, reg); > + } > + > + return 0; > +} > + > +static int __ad7293_spi_read(struct ad7293_state *st, unsigned int reg, > + u16 *val) > +{ > + int ret; > + unsigned int length; > + struct spi_transfer t = {0}; > + > + length = FIELD_GET(AD7293_TRANSF_LEN_MSK, reg); > + > + ret = ad7293_page_select(st, reg); > + if (ret) > + return ret; > + > + st->data[0] = AD7293_READ | FIELD_GET(AD7293_REG_ADDR_MSK, reg); > + st->data[1] = 0x0; > + st->data[2] = 0x0; > + > + t.tx_buf = &st->data[0]; > + t.rx_buf = &st->data[0]; > + t.len = length + 1; > + > + ret = spi_sync_transfer(st->spi, &t, 1); > + if (ret) > + return ret; > + > + if (length == 1) > + *val = st->data[1]; > + else > + *val = get_unaligned_be16(&st->data[1]); > + > + return 0; > +} > + > +static int ad7293_spi_read(struct ad7293_state *st, unsigned int reg, > + u16 *val) > +{ > + int ret; > + > + mutex_lock(&st->lock); > + ret = __ad7293_spi_read(st, reg, val); > + mutex_unlock(&st->lock); > + > + return ret; > +} > + > +static int __ad7293_spi_write(struct ad7293_state *st, unsigned int reg, > + u16 val) > +{ > + int ret; > + unsigned int length; > + > + length = FIELD_GET(AD7293_TRANSF_LEN_MSK, reg); > + > + ret = ad7293_page_select(st, reg); > + if (ret) > + return ret; > + > + st->data[0] = FIELD_GET(AD7293_REG_ADDR_MSK, reg); > + > + if (length == 1) > + st->data[1] = val; > + else > + put_unaligned_be16(val, &st->data[1]); > + > + return spi_write(st->spi, &st->data[0], length + 1); > +} > + > +static int ad7293_spi_write(struct ad7293_state *st, unsigned int reg, > + u16 val) > +{ > + int ret; > + > + mutex_lock(&st->lock); > + ret = __ad7293_spi_write(st, reg, val); > + mutex_unlock(&st->lock); > + > + return ret; > +} > + > +static int __ad7293_spi_update_bits(struct ad7293_state *st, unsigned int reg, > + u16 mask, u16 val) > +{ > + int ret; > + u16 data, temp; > + > + ret = __ad7293_spi_read(st, reg, &data); > + if (ret) > + return ret; > + > + temp = (data & ~mask) | (val & mask); > + > + return __ad7293_spi_write(st, reg, temp); > +} > + > +static int ad7293_spi_update_bits(struct ad7293_state *st, unsigned int reg, > + u16 mask, u16 val) > +{ > + int ret; > + > + mutex_lock(&st->lock); > + ret = __ad7293_spi_update_bits(st, reg, mask, val); > + mutex_unlock(&st->lock); > + > + return ret; > +} > + > +static int ad7293_adc_get_scale(struct ad7293_state *st, unsigned int ch, u16 *range) > +{ > + int ret; > + u16 data; > + > + mutex_lock(&st->lock); > + > + ret = __ad7293_spi_read(st, AD7293_REG_VINX_RANGE1, &data); > + if (ret) > + goto exit; > + > + *range = AD7293_REG_VINX_RANGE_GET_CH_MSK(data, ch); > + > + ret = __ad7293_spi_read(st, AD7293_REG_VINX_RANGE0, &data); > + if (ret) > + goto exit; > + > + *range |= AD7293_REG_VINX_RANGE_GET_CH_MSK(data, ch) << 1; > + > +exit: > + mutex_unlock(&st->lock); > + > + return ret; > +} > + > +static int ad7293_adc_set_scale(struct ad7293_state *st, unsigned int ch, u16 range) > +{ > + int ret; > + unsigned int ch_msk = BIT(ch); > + > + mutex_lock(&st->lock); > + ret = __ad7293_spi_update_bits(st, AD7293_REG_VINX_RANGE1, ch_msk, > + AD7293_REG_VINX_RANGE_SET_CH_MSK(range, ch)); > + if (ret) > + goto exit; > + > + ret = __ad7293_spi_update_bits(st, AD7293_REG_VINX_RANGE0, ch_msk, > + AD7293_REG_VINX_RANGE_SET_CH_MSK((range >> 1), ch)); > + > +exit: > + mutex_unlock(&st->lock); > + > + return ret; > +} > + > +static int ad7293_get_offset(struct ad7293_state *st, unsigned int ch, u16 *offset) > +{ > + if (ch < AD7293_TSENSE_MIN_OFFSET_CH) > + return ad7293_spi_read(st, AD7293_REG_VIN0_OFFSET + ch, offset); > + else if (ch < AD7293_ISENSE_MIN_OFFSET_CH) > + return ad7293_spi_read(st, AD7293_REG_TSENSE_INT_OFFSET + (ch - 4), offset); > + else if (ch < AD7293_VOUT_MIN_OFFSET_CH) > + return ad7293_spi_read(st, AD7293_REG_ISENSE0_OFFSET + (ch - 7), offset); > + else if (ch <= AD7293_VOUT_MAX_OFFSET_CH) > + return ad7293_spi_read(st, AD7293_REG_UNI_VOUT0_OFFSET + (ch - 11), offset); > + > + return -EINVAL; > +} > + > +static int ad7293_set_offset(struct ad7293_state *st, unsigned int ch, u16 offset) > +{ > + if (ch < AD7293_TSENSE_MIN_OFFSET_CH) > + return ad7293_spi_write(st, AD7293_REG_VIN0_OFFSET + ch, offset); > + else if (ch < AD7293_ISENSE_MIN_OFFSET_CH) > + return ad7293_spi_write(st, AD7293_REG_TSENSE_INT_OFFSET + > + (ch - AD7293_TSENSE_MIN_OFFSET_CH), offset); > + else if (ch < AD7293_VOUT_MIN_OFFSET_CH) > + return ad7293_spi_write(st, AD7293_REG_ISENSE0_OFFSET + > + (ch - AD7293_ISENSE_MIN_OFFSET_CH), offset); > + else if (ch <= AD7293_VOUT_MAX_OFFSET_CH) > + return ad7293_spi_update_bits(st, AD7293_REG_UNI_VOUT0_OFFSET + > + (ch - AD7293_VOUT_MIN_OFFSET_CH), > + AD7293_REG_VOUT_OFFSET_MSK, > + FIELD_PREP(AD7293_REG_VOUT_OFFSET_MSK, offset)); > + > + return -EINVAL; > +} > + > +static int ad7293_isense_set_scale(struct ad7293_state *st, unsigned int ch, u16 gain) > +{ > + unsigned int ch_msk = (0xf << (4 * ch)); > + > + return ad7293_spi_update_bits(st, AD7293_REG_ISENSE_GAIN, ch_msk, gain << (4 * ch)); > +} > + > +static int ad7293_isense_get_scale(struct ad7293_state *st, unsigned int ch, u16 *gain) > +{ > + int ret; > + > + ret = ad7293_spi_read(st, AD7293_REG_ISENSE_GAIN, gain); > + if (ret) > + return ret; > + > + *gain = (*gain >> (4 * ch)) & 0xf; > + > + return ret; > +} > + > +static int ad7293_dac_write_raw(struct ad7293_state *st, unsigned int ch, u16 raw) > +{ > + int ret; > + > + mutex_lock(&st->lock); > + > + ret = __ad7293_spi_update_bits(st, AD7293_REG_DAC_EN, BIT(ch), BIT(ch)); > + if (ret) > + goto exit; > + > + ret = __ad7293_spi_write(st, AD7293_REG_UNI_VOUT0 + ch, > + FIELD_PREP(AD7293_REG_DATA_RAW_MSK, raw)); > + > +exit: > + mutex_unlock(&st->lock); > + > + return ret; > +} > + > +static int ad7293_ch_read_raw(struct ad7293_state *st, enum ad7293_ch_type type, unsigned int ch, > + u16 *raw) > +{ > + int ret; > + unsigned int reg_wr, reg_rd, data_wr; > + > + switch (type) { > + case AD7293_ADC_VINX: > + reg_wr = AD7293_REG_VINX_SEQ; > + reg_rd = AD7293_REG_VIN0 + ch; > + data_wr = BIT(ch); > + > + break; > + case AD7293_ADC_TSENSE: > + reg_wr = AD7293_REG_ISENSEX_TSENSEX_SEQ; > + reg_rd = AD7293_REG_TSENSE_INT + ch; > + data_wr = BIT(ch); > + > + break; > + case AD7293_ADC_ISENSE: > + reg_wr = AD7293_REG_ISENSEX_TSENSEX_SEQ; > + reg_rd = AD7293_REG_ISENSE_0 + ch; > + data_wr = BIT(ch) << 8; > + > + break; > + case AD7293_DAC: > + reg_rd = AD7293_REG_UNI_VOUT0 + ch; > + > + break; > + default: > + return -EINVAL; > + } > + > + mutex_lock(&st->lock); > + > + if (type != AD7293_DAC) { > + if (type == AD7293_ADC_TSENSE) { > + ret = __ad7293_spi_write(st, AD7293_REG_TSENSE_BG_EN, BIT(ch)); > + if (ret) > + goto exit; > + > + usleep_range(9000, 9900); > + } else if (type == AD7293_ADC_ISENSE) { > + ret = __ad7293_spi_write(st, AD7293_REG_ISENSE_BG_EN, BIT(ch)); > + if (ret) > + goto exit; > + > + usleep_range(2000, 7000); > + } > + > + ret = __ad7293_spi_write(st, reg_wr, data_wr); > + if (ret) > + goto exit; > + > + ret = __ad7293_spi_write(st, AD7293_REG_CONV_CMD, 0x82); > + if (ret) > + goto exit; > + } > + > + ret = __ad7293_spi_read(st, reg_rd, raw); > + > + *raw = FIELD_GET(AD7293_REG_DATA_RAW_MSK, *raw); > + > +exit: > + mutex_unlock(&st->lock); > + > + return ret; > +} > + > +static int ad7293_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int *val, int *val2, long info) > +{ > + struct ad7293_state *st = iio_priv(indio_dev); > + int ret; > + u16 data; > + > + switch (info) { > + case IIO_CHAN_INFO_RAW: > + switch (chan->type) { > + case IIO_VOLTAGE: > + if (chan->output) > + ret = ad7293_ch_read_raw(st, AD7293_DAC, chan->channel, &data); > + else > + ret = ad7293_ch_read_raw(st, AD7293_ADC_VINX, chan->channel, &data); > + > + break; > + case IIO_CURRENT: > + ret = ad7293_ch_read_raw(st, AD7293_ADC_ISENSE, chan->channel, &data); > + > + break; > + case IIO_TEMP: > + ret = ad7293_ch_read_raw(st, AD7293_ADC_TSENSE, chan->channel, &data); > + > + break; > + default: > + return -EINVAL; > + } > + > + if (ret) > + return ret; > + > + *val = data; > + > + return IIO_VAL_INT; > + case IIO_CHAN_INFO_OFFSET: > + switch (chan->type) { > + case IIO_VOLTAGE: > + if (chan->output) { > + ret = ad7293_get_offset(st, chan->channel + > + AD7293_VOUT_MIN_OFFSET_CH, &data); > + > + data = FIELD_GET(AD7293_REG_VOUT_OFFSET_MSK, data); > + } else { > + ret = ad7293_get_offset(st, chan->channel, &data); > + } > + > + break; > + case IIO_CURRENT: > + ret = ad7293_get_offset(st, chan->channel + > + AD7293_ISENSE_MIN_OFFSET_CH, &data); > + > + break; > + case IIO_TEMP: > + ret = ad7293_get_offset(st, chan->channel + > + AD7293_TSENSE_MIN_OFFSET_CH, &data); > + > + break; > + default: > + return -EINVAL; > + } > + if (ret) > + return ret; > + > + *val = data; > + > + return IIO_VAL_INT; > + case IIO_CHAN_INFO_SCALE: > + switch (chan->type) { > + case IIO_VOLTAGE: > + ret = ad7293_adc_get_scale(st, chan->channel, &data); > + if (ret) > + return ret; > + > + *val = data; > + > + return IIO_VAL_INT; > + case IIO_CURRENT: > + ret = ad7293_isense_get_scale(st, chan->channel, &data); > + if (ret) > + return ret; > + > + *val = data; > + > + return IIO_VAL_INT; > + case IIO_TEMP: > + *val = 1; > + *val2 = 8; > + > + return IIO_VAL_FRACTIONAL; > + default: > + return -EINVAL; > + } > + default: > + return -EINVAL; > + } > +} > + > +static int ad7293_write_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int val, int val2, long info) > +{ > + struct ad7293_state *st = iio_priv(indio_dev); > + > + switch (info) { > + case IIO_CHAN_INFO_RAW: > + switch (chan->type) { > + case IIO_VOLTAGE: > + if (!chan->output) > + return -EINVAL; > + > + return ad7293_dac_write_raw(st, chan->channel, val); > + default: > + return -EINVAL; > + } > + case IIO_CHAN_INFO_OFFSET: > + switch (chan->type) { > + case IIO_VOLTAGE: > + if (chan->output) > + return ad7293_set_offset(st, chan->channel + > + AD7293_VOUT_MIN_OFFSET_CH, val); > + else > + return ad7293_set_offset(st, chan->channel, val); > + case IIO_CURRENT: > + return ad7293_set_offset(st, chan->channel + > + AD7293_ISENSE_MIN_OFFSET_CH, val); > + case IIO_TEMP: > + return ad7293_set_offset(st, chan->channel + > + AD7293_TSENSE_MIN_OFFSET_CH, val); > + default: > + return -EINVAL; > + } > + case IIO_CHAN_INFO_SCALE: > + switch (chan->type) { > + case IIO_VOLTAGE: > + return ad7293_adc_set_scale(st, chan->channel, val); > + case IIO_CURRENT: > + return ad7293_isense_set_scale(st, chan->channel, val); > + default: > + return -EINVAL; > + } > + default: > + return -EINVAL; > + } > +} > + > +static int ad7293_reg_access(struct iio_dev *indio_dev, > + unsigned int reg, > + unsigned int write_val, > + unsigned int *read_val) > +{ > + struct ad7293_state *st = iio_priv(indio_dev); > + int ret; > + > + if (read_val) > + ret = ad7293_spi_read(st, reg, (u16 *)read_val); > + else > + ret = ad7293_spi_write(st, reg, (u16)write_val); > + > + return ret; > +} > + > +static int ad7293_read_avail(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + const int **vals, int *type, int *length, > + long info) > +{ > + switch (info) { > + case IIO_CHAN_INFO_OFFSET: > + *vals = dac_offset_table; > + *type = IIO_VAL_INT; > + *length = ARRAY_SIZE(dac_offset_table); > + > + return IIO_AVAIL_LIST; > + case IIO_CHAN_INFO_SCALE: > + *type = IIO_VAL_INT; > + > + switch (chan->type) { > + case IIO_VOLTAGE: > + *vals = adc_range_table; > + *length = ARRAY_SIZE(adc_range_table); > + return IIO_AVAIL_LIST; > + case IIO_CURRENT: > + *vals = isense_gain_table; > + *length = ARRAY_SIZE(isense_gain_table); > + return IIO_AVAIL_LIST; > + default: > + return -EINVAL; > + } > + default: > + return -EINVAL; > + } > +} > + > +#define AD7293_CHAN_ADC(_channel) { \ > + .type = IIO_VOLTAGE, \ > + .output = 0, \ > + .indexed = 1, \ > + .channel = _channel, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | \ > + BIT(IIO_CHAN_INFO_OFFSET), \ > + .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE) \ > +} > + > +#define AD7293_CHAN_DAC(_channel) { \ > + .type = IIO_VOLTAGE, \ > + .output = 1, \ > + .indexed = 1, \ > + .channel = _channel, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_OFFSET), \ > + .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_OFFSET) \ > +} > + > +#define AD7293_CHAN_ISENSE(_channel) { \ > + .type = IIO_CURRENT, \ > + .output = 0, \ > + .indexed = 1, \ > + .channel = _channel, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_OFFSET) | \ > + BIT(IIO_CHAN_INFO_SCALE), \ > + .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE) \ > +} > + > +#define AD7293_CHAN_TEMP(_channel) { \ > + .type = IIO_TEMP, \ > + .output = 0, \ > + .indexed = 1, \ > + .channel = _channel, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_OFFSET), \ > + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \ > +} > + > +static const struct iio_chan_spec ad7293_channels[] = { > + AD7293_CHAN_ADC(0), > + AD7293_CHAN_ADC(1), > + AD7293_CHAN_ADC(2), > + AD7293_CHAN_ADC(3), > + AD7293_CHAN_ISENSE(0), > + AD7293_CHAN_ISENSE(1), > + AD7293_CHAN_ISENSE(2), > + AD7293_CHAN_ISENSE(3), > + AD7293_CHAN_TEMP(0), > + AD7293_CHAN_TEMP(1), > + AD7293_CHAN_TEMP(2), > + AD7293_CHAN_DAC(0), > + AD7293_CHAN_DAC(1), > + AD7293_CHAN_DAC(2), > + AD7293_CHAN_DAC(3), > + AD7293_CHAN_DAC(4), > + AD7293_CHAN_DAC(5), > + AD7293_CHAN_DAC(6), > + AD7293_CHAN_DAC(7) > +}; > + > +static int ad7293_soft_reset(struct ad7293_state *st) > +{ > + int ret; > + > + ret = __ad7293_spi_write(st, AD7293_REG_SOFT_RESET, 0x7293); > + if (ret) > + return ret; > + > + return __ad7293_spi_write(st, AD7293_REG_SOFT_RESET, 0x0000); > +} > + > +static int ad7293_reset(struct ad7293_state *st) > +{ > + if (st->gpio_reset) { > + gpiod_set_value(st->gpio_reset, 0); > + usleep_range(100, 1000); > + gpiod_set_value(st->gpio_reset, 1); > + usleep_range(100, 1000); > + > + return 0; > + } > + > + /* Perform a software reset */ > + return ad7293_soft_reset(st); > +} > + > +static int ad7293_properties_parse(struct ad7293_state *st) > +{ > + struct spi_device *spi = st->spi; > + > + st->gpio_reset = devm_gpiod_get_optional(&st->spi->dev, "reset", > + GPIOD_OUT_HIGH); > + if (IS_ERR(st->gpio_reset)) > + return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_reset), > + "failed to get the reset GPIO\n"); > + > + st->reg_avdd = devm_regulator_get(&spi->dev, "avdd"); > + if (IS_ERR(st->reg_avdd)) > + return dev_err_probe(&spi->dev, PTR_ERR(st->reg_avdd), > + "failed to get the AVDD voltage\n"); > + > + st->reg_vdrive = devm_regulator_get(&spi->dev, "vdrive"); > + if (IS_ERR(st->reg_vdrive)) > + return dev_err_probe(&spi->dev, PTR_ERR(st->reg_vdrive), > + "failed to get the VDRIVE voltage\n"); > + > + return 0; > +} > + > +static void ad7293_reg_disable(void *data) > +{ > + regulator_disable(data); > +} > + > +static int ad7293_init(struct ad7293_state *st) > +{ > + int ret; > + u16 chip_id; > + struct spi_device *spi = st->spi; > + > + ret = ad7293_properties_parse(st); > + if (ret) > + return ret; > + > + ret = ad7293_reset(st); > + if (ret) > + return ret; > + > + ret = regulator_enable(st->reg_avdd); > + if (ret) { > + dev_err(&spi->dev, "Failed to enable specified AVDD Voltage!\n"); > + return ret; > + } > + > + ret = devm_add_action_or_reset(&spi->dev, ad7293_reg_disable, > + st->reg_avdd); > + if (ret) > + return ret; > + > + ret = regulator_enable(st->reg_vdrive); > + if (ret) { > + dev_err(&spi->dev, "Failed to enable specified VDRIVE Voltage!\n"); > + return ret; > + } > + > + ret = devm_add_action_or_reset(&spi->dev, ad7293_reg_disable, > + st->reg_vdrive); > + if (ret) > + return ret; > + > + ret = regulator_get_voltage(st->reg_avdd); > + if (ret < 0) { > + dev_err(&spi->dev, "Failed to read avdd regulator: %d\n", ret); > + return ret; > + } > + > + if (ret > 5500000 || ret < 4500000) > + return -EINVAL; > + > + ret = regulator_get_voltage(st->reg_vdrive); > + if (ret < 0) { > + dev_err(&spi->dev, "Failed to read vdrive regulator: %d\n", ret); > + return ret; > + } > + if (ret > 5500000 || ret < 1700000) > + return -EINVAL; > + > + /* Check Chip ID */ > + ret = __ad7293_spi_read(st, AD7293_REG_DEVICE_ID, &chip_id); > + if (ret) > + return ret; > + > + if (chip_id != AD7293_CHIP_ID) { > + dev_err(&spi->dev, "Invalid Chip ID.\n"); > + return -EINVAL; > + } > + > + return 0; > +} > + > +static const struct iio_info ad7293_info = { > + .read_raw = ad7293_read_raw, > + .write_raw = ad7293_write_raw, > + .read_avail = &ad7293_read_avail, > + .debugfs_reg_access = &ad7293_reg_access, > +}; > + > +static int ad7293_probe(struct spi_device *spi) > +{ > + struct iio_dev *indio_dev; > + struct ad7293_state *st; > + int ret; > + > + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); > + if (!indio_dev) > + return -ENOMEM; > + > + st = iio_priv(indio_dev); > + > + indio_dev->info = &ad7293_info; > + indio_dev->name = "ad7293"; > + indio_dev->channels = ad7293_channels; > + indio_dev->num_channels = ARRAY_SIZE(ad7293_channels); > + > + st->spi = spi; > + st->page_select = 0; > + > + mutex_init(&st->lock); > + > + ret = ad7293_init(st); > + if (ret) > + return ret; > + > + return devm_iio_device_register(&spi->dev, indio_dev); > +} > + > +static const struct spi_device_id ad7293_id[] = { > + { "ad7293", 0 }, > + {} > +}; > +MODULE_DEVICE_TABLE(spi, ad7293_id); > + > +static const struct of_device_id ad7293_of_match[] = { > + { .compatible = "adi,ad7293" }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, ad7293_of_match); > + > +static struct spi_driver ad7293_driver = { > + .driver = { > + .name = "ad7293", > + .of_match_table = ad7293_of_match, > + }, > + .probe = ad7293_probe, > + .id_table = ad7293_id, > +}; > +module_spi_driver(ad7293_driver); > + > +MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx"); > +MODULE_DESCRIPTION("Analog Devices AD7293"); > +MODULE_LICENSE("GPL v2"); > -- > 2.34.1 >
