[PATCH v7 6/8] iio: dac: ad3552r: extract common code (no changes in behavior intended)

Angelo Dureghello
2024-10-21T12:41:43Z

From: Angelo Dureghello <adureghello@baylibre.com>

Extracting common code, to share common code to be used later
by the AXI driver version (ad3552r-axi.c).

Signed-off-by: Angelo Dureghello <adureghello@baylibre.com>
---
drivers/iio/dac/Makefile | 2 +-
drivers/iio/dac/ad3552r-common.c | 248 ++++++++++++++++++++++++
drivers/iio/dac/ad3552r.c | 398 +++------------------------------------
drivers/iio/dac/ad3552r.h | 226 ++++++++++++++++++++++
4 files changed, 502 insertions(+), 372 deletions(-)

diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile
index 621d553bd6e3..c92de0366238 100644
--- a/drivers/iio/dac/Makefile
+++ b/drivers/iio/dac/Makefile
@@ -4,7 +4,7 @@
#

# When adding new entries keep the list in alphabetical order
-obj-$(CONFIG_AD3552R) += ad3552r.o
+obj-$(CONFIG_AD3552R) += ad3552r.o ad3552r-common.o
obj-$(CONFIG_AD5360) += ad5360.o
obj-$(CONFIG_AD5380) += ad5380.o
obj-$(CONFIG_AD5421) += ad5421.o
diff --git a/drivers/iio/dac/ad3552r-common.c b/drivers/iio/dac/ad3552r-common.c
new file mode 100644
index 000000000000..672f0284bc05
--- /dev/null
+++ b/drivers/iio/dac/ad3552r-common.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright (c) 2010-2024 Analog Devices Inc.
+// Copyright (c) 2024 Baylibre, SAS
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+
+#include "ad3552r.h"
+
+const s32 ad3552r_ch_ranges[AD3552R_MAX_RANGES][2] = {
+ [AD3552R_CH_OUTPUT_RANGE_0__2P5V] = { 0, 2500 },
+ [AD3552R_CH_OUTPUT_RANGE_0__5V] = { 0, 5000 },
+ [AD3552R_CH_OUTPUT_RANGE_0__10V] = { 0, 10000 },
+ [AD3552R_CH_OUTPUT_RANGE_NEG_5__5V] = { -5000, 5000 },
+ [AD3552R_CH_OUTPUT_RANGE_NEG_10__10V] = { -10000, 10000 }
+};
+EXPORT_SYMBOL_NS_GPL(ad3552r_ch_ranges, IIO_AD3552R);
+
+const s32 ad3542r_ch_ranges[AD3542R_MAX_RANGES][2] = {
+ [AD3542R_CH_OUTPUT_RANGE_0__2P5V] = { 0, 2500 },
+ [AD3542R_CH_OUTPUT_RANGE_0__3V] = { 0, 3000 },
+ [AD3542R_CH_OUTPUT_RANGE_0__5V] = { 0, 5000 },
+ [AD3542R_CH_OUTPUT_RANGE_0__10V] = { 0, 10000 },
+ [AD3542R_CH_OUTPUT_RANGE_NEG_2P5__7P5V] = { -2500, 7500 },
+ [AD3542R_CH_OUTPUT_RANGE_NEG_5__5V] = { -5000, 5000 }
+};
+EXPORT_SYMBOL_NS_GPL(ad3542r_ch_ranges, IIO_AD3552R);
+
+/* Gain * AD3552R_GAIN_SCALE */
+static const s32 gains_scaling_table[] = {
+ [AD3552R_CH_GAIN_SCALING_1] = 1000,
+ [AD3552R_CH_GAIN_SCALING_0_5] = 500,
+ [AD3552R_CH_GAIN_SCALING_0_25] = 250,
+ [AD3552R_CH_GAIN_SCALING_0_125] = 125
+};
+
+u16 ad3552r_calc_custom_gain(u8 p, u8 n, s16 goffs)
+{
+ return FIELD_PREP(AD3552R_MASK_CH_RANGE_OVERRIDE, 1) |
+ FIELD_PREP(AD3552R_MASK_CH_GAIN_SCALING_P, p) |
+ FIELD_PREP(AD3552R_MASK_CH_GAIN_SCALING_N, n) |
+ FIELD_PREP(AD3552R_MASK_CH_OFFSET_BIT_8, abs(goffs)) |
+ FIELD_PREP(AD3552R_MASK_CH_OFFSET_POLARITY, goffs < 0);
+}
+EXPORT_SYMBOL_NS_GPL(ad3552r_calc_custom_gain, IIO_AD3552R);
+
+static void ad3552r_get_custom_range(struct ad3552r_ch_data *ch_data,
+ s32 *v_min, s32 *v_max)
+{
+ s64 vref, tmp, common, offset, gn, gp;
+ /*
+ * From datasheet formula (In Volts):
+ * Vmin = 2.5 + [(GainN + Offset / 1024) * 2.5 * Rfb * 1.03]
+ * Vmax = 2.5 - [(GainP + Offset / 1024) * 2.5 * Rfb * 1.03]
+ * Calculus are converted to milivolts
+ */
+ vref = 2500;
+ /* 2.5 * 1.03 * 1000 (To mV) */
+ common = 2575 * ch_data->rfb;
+ offset = ch_data->gain_offset;
+
+ gn = gains_scaling_table[ch_data->n];
+ tmp = (1024 * gn + AD3552R_GAIN_SCALE * offset) * common;
+ tmp = div_s64(tmp, 1024 * AD3552R_GAIN_SCALE);
+ *v_max = vref + tmp;
+
+ gp = gains_scaling_table[ch_data->p];
+ tmp = (1024 * gp - AD3552R_GAIN_SCALE * offset) * common;
+ tmp = div_s64(tmp, 1024 * AD3552R_GAIN_SCALE);
+ *v_min = vref - tmp;
+}
+
+void ad3552r_calc_gain_and_offset(struct ad3552r_ch_data *ch_data,
+ const struct ad3552r_model_data *model_data)
+{
+ s32 idx, v_max, v_min, span, rem;
+ s64 tmp;
+
+ if (ch_data->range_override) {
+ ad3552r_get_custom_range(ch_data, &v_min, &v_max);
+ } else {
+ /* Normal range */
+ idx = ch_data->range;
+ v_min = model_data->ranges_table[idx][0];
+ v_max = model_data->ranges_table[idx][1];
+ }
+
+ /*
+ * From datasheet formula:
+ * Vout = Span * (D / 65536) + Vmin
+ * Converted to scale and offset:
+ * Scale = Span / 65536
+ * Offset = 65536 * Vmin / Span
+ *
+ * Reminders are in micros in order to be printed as
+ * IIO_VAL_INT_PLUS_MICRO
+ */
+ span = v_max - v_min;
+ ch_data->scale_int = div_s64_rem(span, 65536, &rem);
+ /* Do operations in microvolts */
+ ch_data->scale_dec = DIV_ROUND_CLOSEST((s64)rem * 1000000, 65536);
+
+ ch_data->offset_int = div_s64_rem(v_min * 65536, span, &rem);
+ tmp = (s64)rem * 1000000;
+ ch_data->offset_dec = div_s64(tmp, span);
+}
+EXPORT_SYMBOL_NS_GPL(ad3552r_calc_gain_and_offset, IIO_AD3552R);
+
+int ad3552r_get_ref_voltage(struct device *dev, u32 *val)
+{
+ int voltage;
+ int delta = 100000;
+
+ voltage = devm_regulator_get_enable_read_voltage(dev, "vref");
+ if (voltage < 0 && voltage != -ENODEV)
+ return dev_err_probe(dev, voltage,
+ "Error getting vref voltage\n");
+
+ if (voltage == -ENODEV) {
+ if (device_property_read_bool(dev, "adi,vref-out-en"))
+ *val = AD3552R_INTERNAL_VREF_PIN_2P5V;
+ else
+ *val = AD3552R_INTERNAL_VREF_PIN_FLOATING;
+
+ return 0;
+ }
+
+ if (voltage > 2500000 + delta || voltage < 2500000 - delta) {
+ dev_warn(dev, "vref-supply must be 2.5V");
+ return -EINVAL;
+ }
+
+ *val = AD3552R_EXTERNAL_VREF_PIN_INPUT;
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ad3552r_get_ref_voltage, IIO_AD3552R);
+
+int ad3552r_get_drive_strength(struct device *dev, u32 *val)
+{
+ int err;
+ u32 drive_strength;
+
+ err = device_property_read_u32(dev, "adi,sdo-drive-strength",
+ &drive_strength);
+ if (err)
+ return err;
+
+ if (drive_strength > 3) {
+ dev_err_probe(dev, -EINVAL,
+ "adi,sdo-drive-strength must be less than 4\n");
+ return -EINVAL;
+ }
+
+ *val = drive_strength;
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ad3552r_get_drive_strength, IIO_AD3552R);
+
+int ad3552r_get_custom_gain(struct device *dev, struct fwnode_handle *child,
+ u8 *gs_p, u8 *gs_n, u16 *rfb, s16 *goffs)
+{
+ int err;
+ u32 val;
+ struct fwnode_handle *gain_child __free(fwnode_handle) =
+ fwnode_get_named_child_node(child,
+ "custom-output-range-config");
+
+ if (!gain_child)
+ return dev_err_probe(dev, -EINVAL,
+ "custom-output-range-config mandatory\n");
+
+ err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-p", &val);
+ if (err)
+ return dev_err_probe(dev, err,
+ "adi,gain-scaling-p mandatory\n");
+ *gs_p = val;
+
+ err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-n", &val);
+ if (err)
+ return dev_err_probe(dev, err,
+ "adi,gain-scaling-n property mandatory\n");
+ *gs_n = val;
+
+ err = fwnode_property_read_u32(gain_child, "adi,rfb-ohms", &val);
+ if (err)
+ return dev_err_probe(dev, err,
+ "adi,rfb-ohms mandatory\n");
+ *rfb = val;
+
+ err = fwnode_property_read_u32(gain_child, "adi,gain-offset", &val);
+ if (err)
+ return dev_err_probe(dev, err,
+ "adi,gain-offset mandatory\n");
+ *goffs = val;
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ad3552r_get_custom_gain, IIO_AD3552R);
+
+static int ad3552r_find_range(const struct ad3552r_model_data *model_info,
+ s32 *vals)
+{
+ int i;
+
+ for (i = 0; i < model_info->num_ranges; i++)
+ if (vals[0] == model_info->ranges_table[i][0] * 1000 &&
+ vals[1] == model_info->ranges_table[i][1] * 1000)
+ return i;
+
+ return -EINVAL;
+}
+
+int ad3552r_get_output_range(struct device *dev,
+ const struct ad3552r_model_data *model_info,
+ struct fwnode_handle *child, u32 *val)
+{
+ int ret;
+ s32 vals[2];
+
+ /* This property is optional, so returning -ENOENT if missing */
+ if (!fwnode_property_present(child, "adi,output-range-microvolt"))
+ return -ENOENT;
+
+ ret = fwnode_property_read_u32_array(child,
+ "adi,output-range-microvolt",
+ vals, 2);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "invalid adi,output-range-microvolt\n");
+
+ ret = ad3552r_find_range(model_info, vals);
+ if (ret < 0)
+ return dev_err_probe(dev, ret,
+ "invalid adi,output-range-microvolt value\n");
+
+ *val = ret;
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(ad3552r_get_output_range, IIO_AD3552R);
+
+MODULE_DESCRIPTION("ad3552r common functions");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/dac/ad3552r.c b/drivers/iio/dac/ad3552r.c
index 75825d6a398b..bbfb451a5da1 100644
--- a/drivers/iio/dac/ad3552r.c
+++ b/drivers/iio/dac/ad3552r.c
@@ -11,226 +11,9 @@
#include <linux/iio/trigger_consumer.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
-#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>

-/* Register addresses */
-/* Primary address space */
-#define AD3552R_REG_ADDR_INTERFACE_CONFIG_A 0x00
-#define AD3552R_MASK_SOFTWARE_RESET (BIT(7) | BIT(0))
-#define AD3552R_MASK_ADDR_ASCENSION BIT(5)
-#define AD3552R_MASK_SDO_ACTIVE BIT(4)
-#define AD3552R_REG_ADDR_INTERFACE_CONFIG_B 0x01
-#define AD3552R_MASK_SINGLE_INST BIT(7)
-#define AD3552R_MASK_SHORT_INSTRUCTION BIT(3)
-#define AD3552R_REG_ADDR_DEVICE_CONFIG 0x02
-#define AD3552R_MASK_DEVICE_STATUS(n) BIT(4 + (n))
-#define AD3552R_MASK_CUSTOM_MODES GENMASK(3, 2)
-#define AD3552R_MASK_OPERATING_MODES GENMASK(1, 0)
-#define AD3552R_REG_ADDR_CHIP_TYPE 0x03
-#define AD3552R_MASK_CLASS GENMASK(7, 0)
-#define AD3552R_REG_ADDR_PRODUCT_ID_L 0x04
-#define AD3552R_REG_ADDR_PRODUCT_ID_H 0x05
-#define AD3552R_REG_ADDR_CHIP_GRADE 0x06
-#define AD3552R_MASK_GRADE GENMASK(7, 4)
-#define AD3552R_MASK_DEVICE_REVISION GENMASK(3, 0)
-#define AD3552R_REG_ADDR_SCRATCH_PAD 0x0A
-#define AD3552R_REG_ADDR_SPI_REVISION 0x0B
-#define AD3552R_REG_ADDR_VENDOR_L 0x0C
-#define AD3552R_REG_ADDR_VENDOR_H 0x0D
-#define AD3552R_REG_ADDR_STREAM_MODE 0x0E
-#define AD3552R_MASK_LENGTH GENMASK(7, 0)
-#define AD3552R_REG_ADDR_TRANSFER_REGISTER 0x0F
-#define AD3552R_MASK_MULTI_IO_MODE GENMASK(7, 6)
-#define AD3552R_MASK_STREAM_LENGTH_KEEP_VALUE BIT(2)
-#define AD3552R_REG_ADDR_INTERFACE_CONFIG_C 0x10
-#define AD3552R_MASK_CRC_ENABLE (GENMASK(7, 6) |\
- GENMASK(1, 0))
-#define AD3552R_MASK_STRICT_REGISTER_ACCESS BIT(5)
-#define AD3552R_REG_ADDR_INTERFACE_STATUS_A 0x11
-#define AD3552R_MASK_INTERFACE_NOT_READY BIT(7)
-#define AD3552R_MASK_CLOCK_COUNTING_ERROR BIT(5)
-#define AD3552R_MASK_INVALID_OR_NO_CRC BIT(3)
-#define AD3552R_MASK_WRITE_TO_READ_ONLY_REGISTER BIT(2)
-#define AD3552R_MASK_PARTIAL_REGISTER_ACCESS BIT(1)
-#define AD3552R_MASK_REGISTER_ADDRESS_INVALID BIT(0)
-#define AD3552R_REG_ADDR_INTERFACE_CONFIG_D 0x14
-#define AD3552R_MASK_ALERT_ENABLE_PULLUP BIT(6)
-#define AD3552R_MASK_MEM_CRC_EN BIT(4)
-#define AD3552R_MASK_SDO_DRIVE_STRENGTH GENMASK(3, 2)
-#define AD3552R_MASK_DUAL_SPI_SYNCHROUNOUS_EN BIT(1)
-#define AD3552R_MASK_SPI_CONFIG_DDR BIT(0)
-#define AD3552R_REG_ADDR_SH_REFERENCE_CONFIG 0x15
-#define AD3552R_MASK_IDUMP_FAST_MODE BIT(6)
-#define AD3552R_MASK_SAMPLE_HOLD_DIFFERENTIAL_USER_EN BIT(5)
-#define AD3552R_MASK_SAMPLE_HOLD_USER_TRIM GENMASK(4, 3)
-#define AD3552R_MASK_SAMPLE_HOLD_USER_ENABLE BIT(2)
-#define AD3552R_MASK_REFERENCE_VOLTAGE_SEL GENMASK(1, 0)
-#define AD3552R_REG_ADDR_ERR_ALARM_MASK 0x16
-#define AD3552R_MASK_REF_RANGE_ALARM BIT(6)
-#define AD3552R_MASK_CLOCK_COUNT_ERR_ALARM BIT(5)
-#define AD3552R_MASK_MEM_CRC_ERR_ALARM BIT(4)
-#define AD3552R_MASK_SPI_CRC_ERR_ALARM BIT(3)
-#define AD3552R_MASK_WRITE_TO_READ_ONLY_ALARM BIT(2)
-#define AD3552R_MASK_PARTIAL_REGISTER_ACCESS_ALARM BIT(1)
-#define AD3552R_MASK_REGISTER_ADDRESS_INVALID_ALARM BIT(0)
-#define AD3552R_REG_ADDR_ERR_STATUS 0x17
-#define AD3552R_MASK_REF_RANGE_ERR_STATUS BIT(6)
-#define AD3552R_MASK_DUAL_SPI_STREAM_EXCEEDS_DAC_ERR_STATUS BIT(5)
-#define AD3552R_MASK_MEM_CRC_ERR_STATUS BIT(4)
-#define AD3552R_MASK_RESET_STATUS BIT(0)
-#define AD3552R_REG_ADDR_POWERDOWN_CONFIG 0x18
-#define AD3552R_MASK_CH_DAC_POWERDOWN(ch) BIT(4 + (ch))
-#define AD3552R_MASK_CH_AMPLIFIER_POWERDOWN(ch) BIT(ch)
-#define AD3552R_REG_ADDR_CH0_CH1_OUTPUT_RANGE 0x19
-#define AD3552R_MASK_CH_OUTPUT_RANGE_SEL(ch) ((ch) ? GENMASK(7, 4) :\
- GENMASK(3, 0))
-#define AD3552R_REG_ADDR_CH_OFFSET(ch) (0x1B + (ch) * 2)
-#define AD3552R_MASK_CH_OFFSET_BITS_0_7 GENMASK(7, 0)
-#define AD3552R_REG_ADDR_CH_GAIN(ch) (0x1C + (ch) * 2)
-#define AD3552R_MASK_CH_RANGE_OVERRIDE BIT(7)
-#define AD3552R_MASK_CH_GAIN_SCALING_N GENMASK(6, 5)
-#define AD3552R_MASK_CH_GAIN_SCALING_P GENMASK(4, 3)
-#define AD3552R_MASK_CH_OFFSET_POLARITY BIT(2)
-#define AD3552R_MASK_CH_OFFSET_BIT_8 BIT(0)
-/*
- * Secondary region
- * For multibyte registers specify the highest address because the access is
- * done in descending order
- */
-#define AD3552R_SECONDARY_REGION_START 0x28
-#define AD3552R_REG_ADDR_HW_LDAC_16B 0x28
-#define AD3552R_REG_ADDR_CH_DAC_16B(ch) (0x2C - (1 - ch) * 2)
-#define AD3552R_REG_ADDR_DAC_PAGE_MASK_16B 0x2E
-#define AD3552R_REG_ADDR_CH_SELECT_16B 0x2F
-#define AD3552R_REG_ADDR_INPUT_PAGE_MASK_16B 0x31
-#define AD3552R_REG_ADDR_SW_LDAC_16B 0x32
-#define AD3552R_REG_ADDR_CH_INPUT_16B(ch) (0x36 - (1 - ch) * 2)
-/* 3 bytes registers */
-#define AD3552R_REG_START_24B 0x37
-#define AD3552R_REG_ADDR_HW_LDAC_24B 0x37
-#define AD3552R_REG_ADDR_CH_DAC_24B(ch) (0x3D - (1 - ch) * 3)
-#define AD3552R_REG_ADDR_DAC_PAGE_MASK_24B 0x40
-#define AD3552R_REG_ADDR_CH_SELECT_24B 0x41
-#define AD3552R_REG_ADDR_INPUT_PAGE_MASK_24B 0x44
-#define AD3552R_REG_ADDR_SW_LDAC_24B 0x45
-#define AD3552R_REG_ADDR_CH_INPUT_24B(ch) (0x4B - (1 - ch) * 3)
-
-/* Useful defines */
-#define AD3552R_MAX_CH 2
-#define AD3552R_MASK_CH(ch) BIT(ch)
-#define AD3552R_MASK_ALL_CH GENMASK(1, 0)
-#define AD3552R_MAX_REG_SIZE 3
-#define AD3552R_READ_BIT BIT(7)
-#define AD3552R_ADDR_MASK GENMASK(6, 0)
-#define AD3552R_MASK_DAC_12B 0xFFF0
-#define AD3552R_DEFAULT_CONFIG_B_VALUE 0x8
-#define AD3552R_SCRATCH_PAD_TEST_VAL1 0x34
-#define AD3552R_SCRATCH_PAD_TEST_VAL2 0xB2
-#define AD3552R_GAIN_SCALE 1000
-#define AD3552R_LDAC_PULSE_US 100
-
-enum ad3552r_ch_vref_select {
- /* Internal source with Vref I/O floating */
- AD3552R_INTERNAL_VREF_PIN_FLOATING,
- /* Internal source with Vref I/O at 2.5V */
- AD3552R_INTERNAL_VREF_PIN_2P5V,
- /* External source with Vref I/O as input */
- AD3552R_EXTERNAL_VREF_PIN_INPUT
-};
-
-enum ad3552r_id {
- AD3541R_ID = 0x400b,
- AD3542R_ID = 0x4009,
- AD3551R_ID = 0x400a,
- AD3552R_ID = 0x4008,
-};
-
-enum ad3552r_ch_output_range {
- /* Range from 0 V to 2.5 V. Requires Rfb1x connection */
- AD3552R_CH_OUTPUT_RANGE_0__2P5V,
- /* Range from 0 V to 5 V. Requires Rfb1x connection */
- AD3552R_CH_OUTPUT_RANGE_0__5V,
- /* Range from 0 V to 10 V. Requires Rfb2x connection */
- AD3552R_CH_OUTPUT_RANGE_0__10V,
- /* Range from -5 V to 5 V. Requires Rfb2x connection */
- AD3552R_CH_OUTPUT_RANGE_NEG_5__5V,
- /* Range from -10 V to 10 V. Requires Rfb4x connection */
- AD3552R_CH_OUTPUT_RANGE_NEG_10__10V,
-};
-
-static const s32 ad3552r_ch_ranges[][2] = {
- [AD3552R_CH_OUTPUT_RANGE_0__2P5V] = {0, 2500},
- [AD3552R_CH_OUTPUT_RANGE_0__5V] = {0, 5000},
- [AD3552R_CH_OUTPUT_RANGE_0__10V] = {0, 10000},
- [AD3552R_CH_OUTPUT_RANGE_NEG_5__5V] = {-5000, 5000},
- [AD3552R_CH_OUTPUT_RANGE_NEG_10__10V] = {-10000, 10000}
-};
-
-enum ad3542r_ch_output_range {
- /* Range from 0 V to 2.5 V. Requires Rfb1x connection */
- AD3542R_CH_OUTPUT_RANGE_0__2P5V,
- /* Range from 0 V to 3 V. Requires Rfb1x connection */
- AD3542R_CH_OUTPUT_RANGE_0__3V,
- /* Range from 0 V to 5 V. Requires Rfb1x connection */
- AD3542R_CH_OUTPUT_RANGE_0__5V,
- /* Range from 0 V to 10 V. Requires Rfb2x connection */
- AD3542R_CH_OUTPUT_RANGE_0__10V,
- /* Range from -2.5 V to 7.5 V. Requires Rfb2x connection */
- AD3542R_CH_OUTPUT_RANGE_NEG_2P5__7P5V,
- /* Range from -5 V to 5 V. Requires Rfb2x connection */
- AD3542R_CH_OUTPUT_RANGE_NEG_5__5V,
-};
-
-static const s32 ad3542r_ch_ranges[][2] = {
- [AD3542R_CH_OUTPUT_RANGE_0__2P5V] = {0, 2500},
- [AD3542R_CH_OUTPUT_RANGE_0__3V] = {0, 3000},
- [AD3542R_CH_OUTPUT_RANGE_0__5V] = {0, 5000},
- [AD3542R_CH_OUTPUT_RANGE_0__10V] = {0, 10000},
- [AD3542R_CH_OUTPUT_RANGE_NEG_2P5__7P5V] = {-2500, 7500},
- [AD3542R_CH_OUTPUT_RANGE_NEG_5__5V] = {-5000, 5000}
-};
-
-enum ad3552r_ch_gain_scaling {
- /* Gain scaling of 1 */
- AD3552R_CH_GAIN_SCALING_1,
- /* Gain scaling of 0.5 */
- AD3552R_CH_GAIN_SCALING_0_5,
- /* Gain scaling of 0.25 */
- AD3552R_CH_GAIN_SCALING_0_25,
- /* Gain scaling of 0.125 */
- AD3552R_CH_GAIN_SCALING_0_125,
-};
-
-/* Gain * AD3552R_GAIN_SCALE */
-static const s32 gains_scaling_table[] = {
- [AD3552R_CH_GAIN_SCALING_1] = 1000,
- [AD3552R_CH_GAIN_SCALING_0_5] = 500,
- [AD3552R_CH_GAIN_SCALING_0_25] = 250,
- [AD3552R_CH_GAIN_SCALING_0_125] = 125
-};
-
-struct ad3552r_ch_data {
- s32 scale_int;
- s32 scale_dec;
- s32 offset_int;
- s32 offset_dec;
- s16 gain_offset;
- u16 rfb;
- u8 n;
- u8 p;
- u8 range;
- bool range_override;
-};
-
-struct ad3552r_model_data {
- const char *model_name;
- enum ad3552r_id chip_id;
- unsigned int num_hw_channels;
- const s32 (*ranges_table)[2];
- int num_ranges;
- bool requires_output_range;
-};
+#include "ad3552r.h"

struct ad3552r_desc {
const struct ad3552r_model_data *model_data;
@@ -632,136 +415,35 @@ static int ad3552r_reset(struct ad3552r_desc *dac)
FIELD_PREP(AD3552R_MASK_ADDR_ASCENSION, val));
}

-static void ad3552r_get_custom_range(struct ad3552r_desc *dac, s32 i, s32 *v_min,
- s32 *v_max)
-{
- s64 vref, tmp, common, offset, gn, gp;
- /*
- * From datasheet formula (In Volts):
- * Vmin = 2.5 + [(GainN + Offset / 1024) * 2.5 * Rfb * 1.03]
- * Vmax = 2.5 - [(GainP + Offset / 1024) * 2.5 * Rfb * 1.03]
- * Calculus are converted to milivolts
- */
- vref = 2500;
- /* 2.5 * 1.03 * 1000 (To mV) */
- common = 2575 * dac->ch_data[i].rfb;
- offset = dac->ch_data[i].gain_offset;
-
- gn = gains_scaling_table[dac->ch_data[i].n];
- tmp = (1024 * gn + AD3552R_GAIN_SCALE * offset) * common;
- tmp = div_s64(tmp, 1024 * AD3552R_GAIN_SCALE);
- *v_max = vref + tmp;
-
- gp = gains_scaling_table[dac->ch_data[i].p];
- tmp = (1024 * gp - AD3552R_GAIN_SCALE * offset) * common;
- tmp = div_s64(tmp, 1024 * AD3552R_GAIN_SCALE);
- *v_min = vref - tmp;
-}
-
-static void ad3552r_calc_gain_and_offset(struct ad3552r_desc *dac, s32 ch)
-{
- s32 idx, v_max, v_min, span, rem;
- s64 tmp;
-
- if (dac->ch_data[ch].range_override) {
- ad3552r_get_custom_range(dac, ch, &v_min, &v_max);
- } else {
- /* Normal range */
- idx = dac->ch_data[ch].range;
- v_min = dac->model_data->ranges_table[idx][0];
- v_max = dac->model_data->ranges_table[idx][1];
- }
-
- /*
- * From datasheet formula:
- * Vout = Span * (D / 65536) + Vmin
- * Converted to scale and offset:
- * Scale = Span / 65536
- * Offset = 65536 * Vmin / Span
- *
- * Reminders are in micros in order to be printed as
- * IIO_VAL_INT_PLUS_MICRO
- */
- span = v_max - v_min;
- dac->ch_data[ch].scale_int = div_s64_rem(span, 65536, &rem);
- /* Do operations in microvolts */
- dac->ch_data[ch].scale_dec = DIV_ROUND_CLOSEST((s64)rem * 1000000,
- 65536);
-
- dac->ch_data[ch].offset_int = div_s64_rem(v_min * 65536, span, &rem);
- tmp = (s64)rem * 1000000;
- dac->ch_data[ch].offset_dec = div_s64(tmp, span);
-}
-
-static int ad3552r_find_range(const struct ad3552r_model_data *model_data,
- s32 *vals)
-{
- int i;
-
- for (i = 0; i < model_data->num_ranges; i++)
- if (vals[0] == model_data->ranges_table[i][0] * 1000 &&
- vals[1] == model_data->ranges_table[i][1] * 1000)
- return i;
-
- return -EINVAL;
-}
-
static int ad3552r_configure_custom_gain(struct ad3552r_desc *dac,
struct fwnode_handle *child,
u32 ch)
{
struct device *dev = &dac->spi->dev;
- u32 val;
int err;
u8 addr;
- u16 reg = 0, offset;
-
- struct fwnode_handle *gain_child __free(fwnode_handle)
- = fwnode_get_named_child_node(child,
- "custom-output-range-config");
- if (!gain_child)
- return dev_err_probe(dev, -EINVAL,
- "mandatory custom-output-range-config property missing\n");
-
- dac->ch_data[ch].range_override = 1;
- reg |= FIELD_PREP(AD3552R_MASK_CH_RANGE_OVERRIDE, 1);
-
- err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-p", &val);
- if (err)
- return dev_err_probe(dev, err,
- "mandatory adi,gain-scaling-p property missing\n");
- reg |= FIELD_PREP(AD3552R_MASK_CH_GAIN_SCALING_P, val);
- dac->ch_data[ch].p = val;
-
- err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-n", &val);
- if (err)
- return dev_err_probe(dev, err,
- "mandatory adi,gain-scaling-n property missing\n");
- reg |= FIELD_PREP(AD3552R_MASK_CH_GAIN_SCALING_N, val);
- dac->ch_data[ch].n = val;
-
- err = fwnode_property_read_u32(gain_child, "adi,rfb-ohms", &val);
- if (err)
- return dev_err_probe(dev, err,
- "mandatory adi,rfb-ohms property missing\n");
- dac->ch_data[ch].rfb = val;
+ u16 reg;

- err = fwnode_property_read_u32(gain_child, "adi,gain-offset", &val);
+ err = ad3552r_get_custom_gain(dev, child,
+ &dac->ch_data[ch].p,
+ &dac->ch_data[ch].n,
+ &dac->ch_data[ch].rfb,
+ &dac->ch_data[ch].gain_offset);
if (err)
- return dev_err_probe(dev, err,
- "mandatory adi,gain-offset property missing\n");
- dac->ch_data[ch].gain_offset = val;
+ return err;

- offset = abs((s32)val);
- reg |= FIELD_PREP(AD3552R_MASK_CH_OFFSET_BIT_8, (offset >> 8));
+ dac->ch_data[ch].range_override = 1;

- reg |= FIELD_PREP(AD3552R_MASK_CH_OFFSET_POLARITY, (s32)val < 0);
addr = AD3552R_REG_ADDR_CH_GAIN(ch);
err = ad3552r_write_reg(dac, addr,
- offset & AD3552R_MASK_CH_OFFSET_BITS_0_7);
+ abs((s32)dac->ch_data[ch].gain_offset) &
+ AD3552R_MASK_CH_OFFSET_BITS_0_7);
if (err)
return dev_err_probe(dev, err, "Error writing register\n");

+ reg = ad3552r_calc_custom_gain(dac->ch_data[ch].p, dac->ch_data[ch].n,
+ dac->ch_data[ch].gain_offset);
+
err = ad3552r_write_reg(dac, addr, reg);
if (err)
return dev_err_probe(dev, err, "Error writing register\n");
@@ -772,30 +454,17 @@ static int ad3552r_configure_custom_gain(struct ad3552r_desc *dac,
static int ad3552r_configure_device(struct ad3552r_desc *dac)
{
struct device *dev = &dac->spi->dev;
- int err, cnt = 0, voltage, delta = 100000;
- u32 vals[2], val, ch;
+ int err, cnt = 0;
+ u32 val, ch;

dac->gpio_ldac = devm_gpiod_get_optional(dev, "ldac", GPIOD_OUT_HIGH);
if (IS_ERR(dac->gpio_ldac))
return dev_err_probe(dev, PTR_ERR(dac->gpio_ldac),
"Error getting gpio ldac");

- voltage = devm_regulator_get_enable_read_voltage(dev, "vref");
- if (voltage < 0 && voltage != -ENODEV)
- return dev_err_probe(dev, voltage, "Error getting vref voltage\n");
-
- if (voltage == -ENODEV) {
- if (device_property_read_bool(dev, "adi,vref-out-en"))
- val = AD3552R_INTERNAL_VREF_PIN_2P5V;
- else
- val = AD3552R_INTERNAL_VREF_PIN_FLOATING;
- } else {
- if (voltage > 2500000 + delta || voltage < 2500000 - delta) {
- dev_warn(dev, "vref-supply must be 2.5V");
- return -EINVAL;
- }
- val = AD3552R_EXTERNAL_VREF_PIN_INPUT;
- }
+ err = ad3552r_get_ref_voltage(dev, &val);
+ if (err < 0)
+ return err;

err = ad3552r_update_reg_field(dac,
AD3552R_REG_ADDR_SH_REFERENCE_CONFIG,
@@ -804,13 +473,8 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
if (err)
return err;

- err = device_property_read_u32(dev, "adi,sdo-drive-strength", &val);
+ err = ad3552r_get_drive_strength(dev, &val);
if (!err) {
- if (val > 3) {
- dev_err(dev, "adi,sdo-drive-strength must be less than 4\n");
- return -EINVAL;
- }
-
err = ad3552r_update_reg_field(dac,
AD3552R_REG_ADDR_INTERFACE_CONFIG_D,
AD3552R_MASK_SDO_DRIVE_STRENGTH,
@@ -835,21 +499,12 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
"reg must be less than %d\n",
dac->model_data->num_hw_channels);

- if (fwnode_property_present(child, "adi,output-range-microvolt")) {
- err = fwnode_property_read_u32_array(child,
- "adi,output-range-microvolt",
- vals,
- 2);
- if (err)
- return dev_err_probe(dev, err,
- "adi,output-range-microvolt property could not be parsed\n");
-
- err = ad3552r_find_range(dac->model_data, vals);
- if (err < 0)
- return dev_err_probe(dev, err,
- "Invalid adi,output-range-microvolt value\n");
+ err = ad3552r_get_output_range(dev, dac->model_data,
+ child, &val);
+ if (err && err != -ENOENT)
+ return err;

- val = err;
+ if (!err) {
if (ch == 0)
val = FIELD_PREP(AD3552R_MASK_CH_OUTPUT_RANGE_SEL(0), val);
else
@@ -873,7 +528,7 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
return err;
}

- ad3552r_calc_gain_and_offset(dac, ch);
+ ad3552r_calc_gain_and_offset(&dac->ch_data[ch], dac->model_data);
dac->enabled_ch |= BIT(ch);

if (ch == 0)
@@ -1072,3 +727,4 @@ module_spi_driver(ad3552r_driver);
MODULE_AUTHOR("Mihail Chindris <mihail.chindris@analog.com>");
MODULE_DESCRIPTION("Analog Device AD3552R DAC");
MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_AD3552R);
diff --git a/drivers/iio/dac/ad3552r.h b/drivers/iio/dac/ad3552r.h
new file mode 100644
index 000000000000..22bd9ad27c65
--- /dev/null
+++ b/drivers/iio/dac/ad3552r.h
@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * AD3552R Digital <-> Analog converters common header
+ *
+ * Copyright 2021-2024 Analog Devices Inc.
+ * Author: Angelo Dureghello <adureghello@baylibre.com>
+ */
+
+#ifndef __DRIVERS_IIO_DAC_AD3552R_H__
+#define __DRIVERS_IIO_DAC_AD3552R_H__
+
+/* Register addresses */
+/* Primary address space */
+#define AD3552R_REG_ADDR_INTERFACE_CONFIG_A 0x00
+#define AD3552R_MASK_SOFTWARE_RESET (BIT(7) | BIT(0))
+#define AD3552R_MASK_ADDR_ASCENSION BIT(5)
+#define AD3552R_MASK_SDO_ACTIVE BIT(4)
+#define AD3552R_REG_ADDR_INTERFACE_CONFIG_B 0x01
+#define AD3552R_MASK_SINGLE_INST BIT(7)
+#define AD3552R_MASK_SHORT_INSTRUCTION BIT(3)
+#define AD3552R_REG_ADDR_DEVICE_CONFIG 0x02
+#define AD3552R_MASK_DEVICE_STATUS(n) BIT(4 + (n))
+#define AD3552R_MASK_CUSTOM_MODES GENMASK(3, 2)
+#define AD3552R_MASK_OPERATING_MODES GENMASK(1, 0)
+#define AD3552R_REG_ADDR_CHIP_TYPE 0x03
+#define AD3552R_MASK_CLASS GENMASK(7, 0)
+#define AD3552R_REG_ADDR_PRODUCT_ID_L 0x04
+#define AD3552R_REG_ADDR_PRODUCT_ID_H 0x05
+#define AD3552R_REG_ADDR_CHIP_GRADE 0x06
+#define AD3552R_MASK_GRADE GENMASK(7, 4)
+#define AD3552R_MASK_DEVICE_REVISION GENMASK(3, 0)
+#define AD3552R_REG_ADDR_SCRATCH_PAD 0x0A
+#define AD3552R_REG_ADDR_SPI_REVISION 0x0B
+#define AD3552R_REG_ADDR_VENDOR_L 0x0C
+#define AD3552R_REG_ADDR_VENDOR_H 0x0D
+#define AD3552R_REG_ADDR_STREAM_MODE 0x0E
+#define AD3552R_MASK_LENGTH GENMASK(7, 0)
+#define AD3552R_REG_ADDR_TRANSFER_REGISTER 0x0F
+#define AD3552R_MASK_MULTI_IO_MODE GENMASK(7, 6)
+#define AD3552R_MASK_STREAM_LENGTH_KEEP_VALUE BIT(2)
+#define AD3552R_REG_ADDR_INTERFACE_CONFIG_C 0x10
+#define AD3552R_MASK_CRC_ENABLE (GENMASK(7, 6) |\
+ GENMASK(1, 0))
+#define AD3552R_MASK_STRICT_REGISTER_ACCESS BIT(5)
+#define AD3552R_REG_ADDR_INTERFACE_STATUS_A 0x11
+#define AD3552R_MASK_INTERFACE_NOT_READY BIT(7)
+#define AD3552R_MASK_CLOCK_COUNTING_ERROR BIT(5)
+#define AD3552R_MASK_INVALID_OR_NO_CRC BIT(3)
+#define AD3552R_MASK_WRITE_TO_READ_ONLY_REGISTER BIT(2)
+#define AD3552R_MASK_PARTIAL_REGISTER_ACCESS BIT(1)
+#define AD3552R_MASK_REGISTER_ADDRESS_INVALID BIT(0)
+#define AD3552R_REG_ADDR_INTERFACE_CONFIG_D 0x14
+#define AD3552R_MASK_ALERT_ENABLE_PULLUP BIT(6)
+#define AD3552R_MASK_MEM_CRC_EN BIT(4)
+#define AD3552R_MASK_SDO_DRIVE_STRENGTH GENMASK(3, 2)
+#define AD3552R_MASK_DUAL_SPI_SYNCHROUNOUS_EN BIT(1)
+#define AD3552R_MASK_SPI_CONFIG_DDR BIT(0)
+#define AD3552R_REG_ADDR_SH_REFERENCE_CONFIG 0x15
+#define AD3552R_MASK_IDUMP_FAST_MODE BIT(6)
+#define AD3552R_MASK_SAMPLE_HOLD_DIFF_USER_EN BIT(5)
+#define AD3552R_MASK_SAMPLE_HOLD_USER_TRIM GENMASK(4, 3)
+#define AD3552R_MASK_SAMPLE_HOLD_USER_ENABLE BIT(2)
+#define AD3552R_MASK_REFERENCE_VOLTAGE_SEL GENMASK(1, 0)
+#define AD3552R_REG_ADDR_ERR_ALARM_MASK 0x16
+#define AD3552R_MASK_REF_RANGE_ALARM BIT(6)
+#define AD3552R_MASK_CLOCK_COUNT_ERR_ALARM BIT(5)
+#define AD3552R_MASK_MEM_CRC_ERR_ALARM BIT(4)
+#define AD3552R_MASK_SPI_CRC_ERR_ALARM BIT(3)
+#define AD3552R_MASK_WRITE_TO_READ_ONLY_ALARM BIT(2)
+#define AD3552R_MASK_PARTIAL_REGISTER_ACCESS_ALARM BIT(1)
+#define AD3552R_MASK_REGISTER_ADDRESS_INVALID_ALARM BIT(0)
+#define AD3552R_REG_ADDR_ERR_STATUS 0x17
+#define AD3552R_MASK_REF_RANGE_ERR_STATUS BIT(6)
+#define AD3552R_MASK_STREAM_EXCEEDS_DAC_ERR_STATUS BIT(5)
+#define AD3552R_MASK_MEM_CRC_ERR_STATUS BIT(4)
+#define AD3552R_MASK_RESET_STATUS BIT(0)
+#define AD3552R_REG_ADDR_POWERDOWN_CONFIG 0x18
+#define AD3552R_MASK_CH_DAC_POWERDOWN(ch) BIT(4 + (ch))
+#define AD3552R_MASK_CH_AMPLIFIER_POWERDOWN(ch) BIT(ch)
+#define AD3552R_REG_ADDR_CH0_CH1_OUTPUT_RANGE 0x19
+#define AD3552R_MASK_CH0_RANGE GENMASK(2, 0)
+#define AD3552R_MASK_CH1_RANGE GENMASK(6, 4)
+#define AD3552R_MASK_CH_OUTPUT_RANGE GENMASK(7, 0)
+#define AD3552R_MASK_CH_OUTPUT_RANGE_SEL(ch) ((ch) ? \
+ GENMASK(7, 4) : \
+ GENMASK(3, 0))
+#define AD3552R_REG_ADDR_CH_OFFSET(ch) (0x1B + (ch) * 2)
+#define AD3552R_MASK_CH_OFFSET_BITS_0_7 GENMASK(7, 0)
+#define AD3552R_REG_ADDR_CH_GAIN(ch) (0x1C + (ch) * 2)
+#define AD3552R_MASK_CH_RANGE_OVERRIDE BIT(7)
+#define AD3552R_MASK_CH_GAIN_SCALING_N GENMASK(6, 5)
+#define AD3552R_MASK_CH_GAIN_SCALING_P GENMASK(4, 3)
+#define AD3552R_MASK_CH_OFFSET_POLARITY BIT(2)
+#define AD3552R_MASK_CH_OFFSET_BIT_8 BIT(8)
+/*
+ * Secondary region
+ * For multibyte registers specify the highest address because the access is
+ * done in descending order
+ */
+#define AD3552R_SECONDARY_REGION_START 0x28
+#define AD3552R_REG_ADDR_HW_LDAC_16B 0x28
+#define AD3552R_REG_ADDR_CH_DAC_16B(ch) (0x2C - (1 - (ch)) * 2)
+#define AD3552R_REG_ADDR_DAC_PAGE_MASK_16B 0x2E
+#define AD3552R_REG_ADDR_CH_SELECT_16B 0x2F
+#define AD3552R_REG_ADDR_INPUT_PAGE_MASK_16B 0x31
+#define AD3552R_REG_ADDR_SW_LDAC_16B 0x32
+#define AD3552R_REG_ADDR_CH_INPUT_16B(ch) (0x36 - (1 - (ch)) * 2)
+/* 3 bytes registers */
+#define AD3552R_REG_START_24B 0x37
+#define AD3552R_REG_ADDR_HW_LDAC_24B 0x37
+#define AD3552R_REG_ADDR_CH_DAC_24B(ch) (0x3D - (1 - (ch)) * 3)
+#define AD3552R_REG_ADDR_DAC_PAGE_MASK_24B 0x40
+#define AD3552R_REG_ADDR_CH_SELECT_24B 0x41
+#define AD3552R_REG_ADDR_INPUT_PAGE_MASK_24B 0x44
+#define AD3552R_REG_ADDR_SW_LDAC_24B 0x45
+#define AD3552R_REG_ADDR_CH_INPUT_24B(ch) (0x4B - (1 - (ch)) * 3)
+
+/* Useful defines */
+#define AD3552R_MAX_CH 2
+#define AD3552R_MASK_CH(ch) BIT(ch)
+#define AD3552R_MASK_ALL_CH GENMASK(1, 0)
+#define AD3552R_MAX_REG_SIZE 3
+#define AD3552R_READ_BIT BIT(7)
+#define AD3552R_ADDR_MASK GENMASK(6, 0)
+#define AD3552R_MASK_DAC_12B GENMASK(15, 4)
+#define AD3552R_DEFAULT_CONFIG_B_VALUE 0x8
+#define AD3552R_SCRATCH_PAD_TEST_VAL1 0x34
+#define AD3552R_SCRATCH_PAD_TEST_VAL2 0xB2
+#define AD3552R_GAIN_SCALE 1000
+#define AD3552R_LDAC_PULSE_US 100
+
+#define AD3552R_MAX_RANGES 5
+#define AD3542R_MAX_RANGES 6
+
+extern const s32 ad3552r_ch_ranges[AD3552R_MAX_RANGES][2];
+extern const s32 ad3542r_ch_ranges[AD3542R_MAX_RANGES][2];
+
+enum ad3552r_id {
+ AD3541R_ID = 0x400b,
+ AD3542R_ID = 0x4009,
+ AD3551R_ID = 0x400a,
+ AD3552R_ID = 0x4008,
+};
+
+struct ad3552r_model_data {
+ const char *model_name;
+ enum ad3552r_id chip_id;
+ unsigned int num_hw_channels;
+ const s32 (*ranges_table)[2];
+ int num_ranges;
+ bool requires_output_range;
+};
+
+struct ad3552r_ch_data {
+ s32 scale_int;
+ s32 scale_dec;
+ s32 offset_int;
+ s32 offset_dec;
+ s16 gain_offset;
+ u16 rfb;
+ u8 n;
+ u8 p;
+ u8 range;
+ bool range_override;
+};
+
+enum ad3552r_ch_gain_scaling {
+ /* Gain scaling of 1 */
+ AD3552R_CH_GAIN_SCALING_1,
+ /* Gain scaling of 0.5 */
+ AD3552R_CH_GAIN_SCALING_0_5,
+ /* Gain scaling of 0.25 */
+ AD3552R_CH_GAIN_SCALING_0_25,
+ /* Gain scaling of 0.125 */
+ AD3552R_CH_GAIN_SCALING_0_125,
+};
+
+enum ad3552r_ch_vref_select {
+ /* Internal source with Vref I/O floating */
+ AD3552R_INTERNAL_VREF_PIN_FLOATING,
+ /* Internal source with Vref I/O at 2.5V */
+ AD3552R_INTERNAL_VREF_PIN_2P5V,
+ /* External source with Vref I/O as input */
+ AD3552R_EXTERNAL_VREF_PIN_INPUT
+};
+
+enum ad3542r_ch_output_range {
+ /* Range from 0 V to 2.5 V. Requires Rfb1x connection */
+ AD3542R_CH_OUTPUT_RANGE_0__2P5V,
+ /* Range from 0 V to 3 V. Requires Rfb1x connection */
+ AD3542R_CH_OUTPUT_RANGE_0__3V,
+ /* Range from 0 V to 5 V. Requires Rfb1x connection */
+ AD3542R_CH_OUTPUT_RANGE_0__5V,
+ /* Range from 0 V to 10 V. Requires Rfb2x connection */
+ AD3542R_CH_OUTPUT_RANGE_0__10V,
+ /* Range from -2.5 V to 7.5 V. Requires Rfb2x connection */
+ AD3542R_CH_OUTPUT_RANGE_NEG_2P5__7P5V,
+ /* Range from -5 V to 5 V. Requires Rfb2x connection */
+ AD3542R_CH_OUTPUT_RANGE_NEG_5__5V,
+};
+
+enum ad3552r_ch_output_range {
+ /* Range from 0 V to 2.5 V. Requires Rfb1x connection */
+ AD3552R_CH_OUTPUT_RANGE_0__2P5V,
+ /* Range from 0 V to 5 V. Requires Rfb1x connection */
+ AD3552R_CH_OUTPUT_RANGE_0__5V,
+ /* Range from 0 V to 10 V. Requires Rfb2x connection */
+ AD3552R_CH_OUTPUT_RANGE_0__10V,
+ /* Range from -5 V to 5 V. Requires Rfb2x connection */
+ AD3552R_CH_OUTPUT_RANGE_NEG_5__5V,
+ /* Range from -10 V to 10 V. Requires Rfb4x connection */
+ AD3552R_CH_OUTPUT_RANGE_NEG_10__10V,
+};
+
+int ad3552r_get_output_range(struct device *dev,
+ const struct ad3552r_model_data *model_info,
+ struct fwnode_handle *child, u32 *val);
+int ad3552r_get_custom_gain(struct device *dev, struct fwnode_handle *child,
+ u8 *gs_p, u8 *gs_n, u16 *rfb, s16 *goffs);
+u16 ad3552r_calc_custom_gain(u8 p, u8 n, s16 goffs);
+int ad3552r_get_ref_voltage(struct device *dev, u32 *val);
+int ad3552r_get_drive_strength(struct device *dev, u32 *val);
+void ad3552r_calc_gain_and_offset(struct ad3552r_ch_data *ch_data,
+ const struct ad3552r_model_data *model_data);
+
+#endif /* __DRIVERS_IIO_DAC_AD3552R_H__ */

--
2.45.0.rc1