The ADMV1014 is a silicon germanium (SiGe), wideband,
microwave downconverter optimized for point to point microwave
radio designs operating in the 24 GHz to 44 GHz frequency range.
Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADMV1014.pdf
Signed-off-by: Antoniu Miclaus <[email protected]>
---
changes in v4:
- make regulators mandatory
- use regulator bulk get/enable
drivers/iio/frequency/Kconfig | 10 +
drivers/iio/frequency/Makefile | 1 +
drivers/iio/frequency/admv1014.c | 820 +++++++++++++++++++++++++++++++
3 files changed, 831 insertions(+)
create mode 100644 drivers/iio/frequency/admv1014.c
diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig
index 2c9e0559e8a4..493221f42077 100644
--- a/drivers/iio/frequency/Kconfig
+++ b/drivers/iio/frequency/Kconfig
@@ -50,6 +50,16 @@ config ADF4371
To compile this driver as a module, choose M here: the
module will be called adf4371.
+config ADMV1014
+ tristate "Analog Devices ADMV1014 Microwave Downconverter"
+ depends on SPI && COMMON_CLK && 64BIT
+ help
+ Say yes here to build support for Analog Devices ADMV1014
+ 24 GHz to 44 GHz, Wideband, Microwave Downconverter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called admv1014.
+
config ADRF6780
tristate "Analog Devices ADRF6780 Microwave Upconverter"
depends on SPI
diff --git a/drivers/iio/frequency/Makefile b/drivers/iio/frequency/Makefile
index ae3136c79202..5f0348e5eb53 100644
--- a/drivers/iio/frequency/Makefile
+++ b/drivers/iio/frequency/Makefile
@@ -7,4 +7,5 @@
obj-$(CONFIG_AD9523) += ad9523.o
obj-$(CONFIG_ADF4350) += adf4350.o
obj-$(CONFIG_ADF4371) += adf4371.o
+obj-$(CONFIG_ADMV1014) += admv1014.o
obj-$(CONFIG_ADRF6780) += adrf6780.o
diff --git a/drivers/iio/frequency/admv1014.c b/drivers/iio/frequency/admv1014.c
new file mode 100644
index 000000000000..4ae422bd9bf4
--- /dev/null
+++ b/drivers/iio/frequency/admv1014.c
@@ -0,0 +1,820 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADMV1014 driver
+ *
+ * Copyright 2022 Analog Devices Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/notifier.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+#include <linux/units.h>
+
+#include <asm/unaligned.h>
+
+/* ADMV1014 Register Map */
+#define ADMV1014_REG_SPI_CONTROL 0x00
+#define ADMV1014_REG_ALARM 0x01
+#define ADMV1014_REG_ALARM_MASKS 0x02
+#define ADMV1014_REG_ENABLE 0x03
+#define ADMV1014_REG_QUAD 0x04
+#define ADMV1014_REG_LO_AMP_PHASE_ADJUST1 0x05
+#define ADMV1014_REG_MIXER 0x07
+#define ADMV1014_REG_IF_AMP 0x08
+#define ADMV1014_REG_IF_AMP_BB_AMP 0x09
+#define ADMV1014_REG_BB_AMP_AGC 0x0A
+#define ADMV1014_REG_VVA_TEMP_COMP 0x0B
+
+/* ADMV1014_REG_SPI_CONTROL Map */
+#define ADMV1014_PARITY_EN_MSK BIT(15)
+#define ADMV1014_SPI_SOFT_RESET_MSK BIT(14)
+#define ADMV1014_CHIP_ID_MSK GENMASK(11, 4)
+#define ADMV1014_CHIP_ID 0x9
+#define ADMV1014_REVISION_ID_MSK GENMASK(3, 0)
+
+/* ADMV1014_REG_ALARM Map */
+#define ADMV1014_PARITY_ERROR_MSK BIT(15)
+#define ADMV1014_TOO_FEW_ERRORS_MSK BIT(14)
+#define ADMV1014_TOO_MANY_ERRORS_MSK BIT(13)
+#define ADMV1014_ADDRESS_RANGE_ERROR_MSK BIT(12)
+
+/* ADMV1014_REG_ENABLE Map */
+#define ADMV1014_IBIAS_PD_MSK BIT(14)
+#define ADMV1014_P1DB_COMPENSATION_MSK GENMASK(13, 12)
+#define ADMV1014_IF_AMP_PD_MSK BIT(11)
+#define ADMV1014_QUAD_BG_PD_MSK BIT(9)
+#define ADMV1014_BB_AMP_PD_MSK BIT(8)
+#define ADMV1014_QUAD_IBIAS_PD_MSK BIT(7)
+#define ADMV1014_DET_EN_MSK BIT(6)
+#define ADMV1014_BG_PD_MSK BIT(5)
+
+/* ADMV1014_REG_QUAD Map */
+#define ADMV1014_QUAD_SE_MODE_MSK GENMASK(9, 6)
+#define ADMV1014_QUAD_FILTERS_MSK GENMASK(3, 0)
+
+/* ADMV1014_REG_LO_AMP_PHASE_ADJUST1 Map */
+#define ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK GENMASK(15, 9)
+#define ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK GENMASK(8, 2)
+
+/* ADMV1014_REG_MIXER Map */
+#define ADMV1014_MIXER_VGATE_MSK GENMASK(15, 9)
+#define ADMV1014_DET_PROG_MSK GENMASK(6, 0)
+
+/* ADMV1014_REG_IF_AMP Map */
+#define ADMV1014_IF_AMP_COARSE_GAIN_I_MSK GENMASK(11, 8)
+#define ADMV1014_IF_AMP_FINE_GAIN_Q_MSK GENMASK(7, 4)
+#define ADMV1014_IF_AMP_FINE_GAIN_I_MSK GENMASK(3, 0)
+
+/* ADMV1014_REG_IF_AMP_BB_AMP Map */
+#define ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK GENMASK(15, 12)
+#define ADMV1014_BB_AMP_OFFSET_Q_MSK GENMASK(9, 5)
+#define ADMV1014_BB_AMP_OFFSET_I_MSK GENMASK(4, 0)
+
+/* ADMV1014_REG_BB_AMP_AGC Map */
+#define ADMV1014_BB_AMP_REF_GEN_MSK GENMASK(6, 3)
+#define ADMV1014_BB_AMP_GAIN_CTRL_MSK GENMASK(2, 1)
+#define ADMV1014_BB_SWITCH_HIGH_LOW_CM_MSK BIT(0)
+
+/* ADMV1014_REG_VVA_TEMP_COMP Map */
+#define ADMV1014_VVA_TEMP_COMP_MSK GENMASK(15, 0)
+
+/* ADMV1014 Miscellaneous Defines */
+#define ADMV1014_READ BIT(7)
+#define ADMV1014_REG_ADDR_READ_MSK GENMASK(6, 1)
+#define ADMV1014_REG_ADDR_WRITE_MSK GENMASK(22, 17)
+#define ADMV1014_REG_DATA_MSK GENMASK(16, 1)
+#define ADMV1014_NUM_REGULATORS 9
+
+enum {
+ ADMV1014_IQ_MODE,
+ ADMV1014_IF_MODE
+};
+
+enum {
+ ADMV1014_SE_MODE_POS = 6,
+ ADMV1014_SE_MODE_NEG = 9,
+ ADMV1014_SE_MODE_DIFF = 12
+};
+
+enum {
+ ADMV1014_CALIBSCALE_COARSE,
+ ADMV1014_CALIBSCALE_FINE,
+};
+
+static const int detector_table[] = {0, 1, 2, 4, 8, 16, 32, 64};
+
+struct admv1014_state {
+ struct spi_device *spi;
+ struct clk *clkin;
+ struct notifier_block nb;
+ /* Protect against concurrent accesses to the device and to data*/
+ struct mutex lock;
+ struct regulator_bulk_data regulators[ADMV1014_NUM_REGULATORS];
+ unsigned int input_mode;
+ unsigned int quad_se_mode;
+ unsigned int p1db_comp;
+ bool det_en;
+ u8 data[3] ____cacheline_aligned;
+};
+
+static const int mixer_vgate_table[] = {106, 107, 108, 110, 111, 112, 113, 114,
+ 117, 118, 119, 120, 122, 123, 44, 45};
+
+static int __admv1014_spi_read(struct admv1014_state *st, unsigned int reg,
+ unsigned int *val)
+{
+ int ret;
+ struct spi_transfer t = {0};
+
+ st->data[0] = ADMV1014_READ | FIELD_PREP(ADMV1014_REG_ADDR_READ_MSK, reg);
+ st->data[1] = 0x0;
+ st->data[2] = 0x0;
+
+ t.rx_buf = &st->data[0];
+ t.tx_buf = &st->data[0];
+ t.len = 3;
+
+ ret = spi_sync_transfer(st->spi, &t, 1);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(ADMV1014_REG_DATA_MSK, get_unaligned_be24(&st->data[0]));
+
+ return ret;
+}
+
+static int admv1014_spi_read(struct admv1014_state *st, unsigned int reg,
+ unsigned int *val)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = __admv1014_spi_read(st, reg, val);
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int __admv1014_spi_write(struct admv1014_state *st,
+ unsigned int reg,
+ unsigned int val)
+{
+ put_unaligned_be24(FIELD_PREP(ADMV1014_REG_DATA_MSK, val) |
+ FIELD_PREP(ADMV1014_REG_ADDR_WRITE_MSK, reg), &st->data[0]);
+
+ return spi_write(st->spi, &st->data[0], 3);
+}
+
+static int admv1014_spi_write(struct admv1014_state *st, unsigned int reg,
+ unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = __admv1014_spi_write(st, reg, val);
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int __admv1014_spi_update_bits(struct admv1014_state *st, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ int ret;
+ unsigned int data, temp;
+
+ ret = __admv1014_spi_read(st, reg, &data);
+ if (ret)
+ return ret;
+
+ temp = (data & ~mask) | (val & mask);
+
+ return __admv1014_spi_write(st, reg, temp);
+}
+
+static int admv1014_spi_update_bits(struct admv1014_state *st, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = __admv1014_spi_update_bits(st, reg, mask, val);
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int admv1014_update_quad_filters(struct admv1014_state *st)
+{
+ unsigned int filt_raw;
+ u64 rate = clk_get_rate(st->clkin);
+
+ if (rate >= (5400 * HZ_PER_MHZ) && rate <= (7000 * HZ_PER_MHZ))
+ filt_raw = 15;
+ else if (rate >= (5400 * HZ_PER_MHZ) && rate <= (8000 * HZ_PER_MHZ))
+ filt_raw = 10;
+ else if (rate >= (6600 * HZ_PER_MHZ) && rate <= (9200 * HZ_PER_MHZ))
+ filt_raw = 5;
+ else
+ filt_raw = 0;
+
+ return __admv1014_spi_update_bits(st, ADMV1014_REG_QUAD,
+ ADMV1014_QUAD_FILTERS_MSK,
+ FIELD_PREP(ADMV1014_QUAD_FILTERS_MSK, filt_raw));
+}
+
+static int admv1014_update_vcm_settings(struct admv1014_state *st)
+{
+ unsigned int i, vcm_mv, vcm_comp, bb_sw_hl_cm;
+ int ret;
+
+ vcm_mv = regulator_get_voltage(st->regulators[0].consumer) / 1000;
+ for (i = 0; i < ARRAY_SIZE(mixer_vgate_table); i++) {
+ vcm_comp = 1050 + (i * 50) + (i / 8 * 50);
+ if (vcm_mv != vcm_comp)
+ continue;
+
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_MIXER,
+ ADMV1014_MIXER_VGATE_MSK,
+ FIELD_PREP(ADMV1014_MIXER_VGATE_MSK,
+ mixer_vgate_table[i]));
+ if (ret)
+ return ret;
+
+ bb_sw_hl_cm = ~(i / 8);
+ bb_sw_hl_cm = FIELD_PREP(ADMV1014_BB_SWITCH_HIGH_LOW_CM_MSK, bb_sw_hl_cm);
+
+ return __admv1014_spi_update_bits(st, ADMV1014_REG_BB_AMP_AGC,
+ ADMV1014_BB_AMP_REF_GEN_MSK |
+ ADMV1014_BB_SWITCH_HIGH_LOW_CM_MSK,
+ FIELD_PREP(ADMV1014_BB_AMP_REF_GEN_MSK, i) |
+ bb_sw_hl_cm);
+ }
+
+ return -EINVAL;
+}
+
+static int admv1014_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long info)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+ unsigned int data;
+ int ret;
+
+ switch (info) {
+ case IIO_CHAN_INFO_OFFSET:
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP_BB_AMP, &data);
+ if (ret)
+ return ret;
+
+ if (chan->channel2 == IIO_MOD_I)
+ *val = FIELD_GET(ADMV1014_BB_AMP_OFFSET_I_MSK, data);
+ else
+ *val = FIELD_GET(ADMV1014_BB_AMP_OFFSET_Q_MSK, data);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_PHASE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_LO_AMP_PHASE_ADJUST1, &data);
+ if (ret)
+ return ret;
+
+ if (chan->channel2 == IIO_MOD_I)
+ *val = FIELD_GET(ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK, data);
+ else
+ *val = FIELD_GET(ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK, data);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_MIXER, &data);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(ADMV1014_DET_PROG_MSK, data);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_BB_AMP_AGC, &data);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(ADMV1014_BB_AMP_GAIN_CTRL_MSK, data);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int admv1014_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long info)
+{
+ int data;
+ unsigned int msk;
+ struct admv1014_state *st = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_CHAN_INFO_OFFSET:
+ if (chan->channel2 == IIO_MOD_I) {
+ msk = ADMV1014_BB_AMP_OFFSET_I_MSK;
+ data = FIELD_PREP(ADMV1014_BB_AMP_OFFSET_I_MSK, val);
+ } else {
+ msk = ADMV1014_BB_AMP_OFFSET_Q_MSK;
+ data = FIELD_PREP(ADMV1014_BB_AMP_OFFSET_Q_MSK, val);
+ }
+
+ return admv1014_spi_update_bits(st, ADMV1014_REG_IF_AMP_BB_AMP, msk, data);
+ case IIO_CHAN_INFO_PHASE:
+ if (chan->channel2 == IIO_MOD_I) {
+ msk = ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK;
+ data = FIELD_PREP(ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK, val);
+ } else {
+ msk = ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK;
+ data = FIELD_PREP(ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK, val);
+ }
+
+ return admv1014_spi_update_bits(st, ADMV1014_REG_LO_AMP_PHASE_ADJUST1, msk, data);
+ case IIO_CHAN_INFO_SCALE:
+ return admv1014_spi_update_bits(st, ADMV1014_REG_MIXER,
+ ADMV1014_DET_PROG_MSK,
+ FIELD_PREP(ADMV1014_DET_PROG_MSK, val));
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return admv1014_spi_update_bits(st, ADMV1014_REG_BB_AMP_AGC,
+ ADMV1014_BB_AMP_GAIN_CTRL_MSK,
+ FIELD_PREP(ADMV1014_BB_AMP_GAIN_CTRL_MSK, val));
+ default:
+ return -EINVAL;
+ }
+}
+
+static ssize_t admv1014_read(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+ unsigned int data;
+ int ret;
+
+ switch ((u32)private) {
+ case ADMV1014_CALIBSCALE_COARSE:
+ if (chan->channel2 == IIO_MOD_I) {
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP, &data);
+ if (ret)
+ return ret;
+
+ data = FIELD_GET(ADMV1014_IF_AMP_COARSE_GAIN_I_MSK, data);
+ } else {
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP_BB_AMP, &data);
+ if (ret)
+ return ret;
+
+ data = FIELD_GET(ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK, data);
+ }
+ break;
+ case ADMV1014_CALIBSCALE_FINE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP, &data);
+ if (ret)
+ return ret;
+
+ if (chan->channel2 == IIO_MOD_I)
+ data = FIELD_GET(ADMV1014_IF_AMP_FINE_GAIN_I_MSK, data);
+ else
+ data = FIELD_GET(ADMV1014_IF_AMP_FINE_GAIN_Q_MSK, data);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "%u\n", data);
+}
+
+static ssize_t admv1014_write(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+ unsigned int data, addr, msk;
+ int ret;
+
+ ret = kstrtou32(buf, 10, &data);
+ if (ret)
+ return ret;
+
+ switch ((u32)private) {
+ case ADMV1014_CALIBSCALE_COARSE:
+ if (chan->channel2 == IIO_MOD_I) {
+ addr = ADMV1014_REG_IF_AMP;
+ msk = ADMV1014_IF_AMP_COARSE_GAIN_I_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_COARSE_GAIN_I_MSK, data);
+ } else {
+ addr = ADMV1014_REG_IF_AMP_BB_AMP;
+ msk = ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK, data);
+ }
+ break;
+ case ADMV1014_CALIBSCALE_FINE:
+ addr = ADMV1014_REG_IF_AMP;
+
+ if (chan->channel2 == IIO_MOD_I) {
+ msk = ADMV1014_IF_AMP_FINE_GAIN_I_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_FINE_GAIN_I_MSK, data);
+ } else {
+ msk = ADMV1014_IF_AMP_FINE_GAIN_Q_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_FINE_GAIN_Q_MSK, data);
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = admv1014_spi_update_bits(st, addr, msk, data);
+
+ return ret ? ret : len;
+}
+
+static int admv1014_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_SCALE:
+ *vals = detector_table;
+ *type = IIO_VAL_INT;
+ *length = ARRAY_SIZE(detector_table);
+
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int admv1014_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg,
+ unsigned int write_val,
+ unsigned int *read_val)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+
+ if (read_val)
+ return admv1014_spi_read(st, reg, read_val);
+ else
+ return admv1014_spi_write(st, reg, write_val);
+}
+
+static const struct iio_info admv1014_info = {
+ .read_raw = admv1014_read_raw,
+ .write_raw = admv1014_write_raw,
+ .read_avail = &admv1014_read_avail,
+ .debugfs_reg_access = &admv1014_reg_access,
+};
+
+static const char * const admv1014_reg_name[] = {
+ "vcm", "vcc-if-bb", "vcc-vga", "vcc-vva", "vcc-lna-3p3", "vcc-lna-1p5",
+ "vcc-bg", "vcc-quad", "vcc-mixer"
+};
+
+static int admv1014_freq_change(struct notifier_block *nb, unsigned long action, void *data)
+{
+ struct admv1014_state *st = container_of(nb, struct admv1014_state, nb);
+ int ret;
+
+ if (action == POST_RATE_CHANGE) {
+ mutex_lock(&st->lock);
+ ret = notifier_from_errno(admv1014_update_quad_filters(st));
+ mutex_unlock(&st->lock);
+ return ret;
+ }
+
+ return NOTIFY_OK;
+}
+
+#define _ADMV1014_EXT_INFO(_name, _shared, _ident) { \
+ .name = _name, \
+ .read = admv1014_read, \
+ .write = admv1014_write, \
+ .private = _ident, \
+ .shared = _shared, \
+}
+
+static const struct iio_chan_spec_ext_info admv1014_ext_info[] = {
+ _ADMV1014_EXT_INFO("calibscale_coarse", IIO_SEPARATE, ADMV1014_CALIBSCALE_COARSE),
+ _ADMV1014_EXT_INFO("calibscale_fine", IIO_SEPARATE, ADMV1014_CALIBSCALE_FINE),
+ { }
+};
+
+#define ADMV1014_CHAN_IQ(_channel, rf_comp) { \
+ .type = IIO_ALTVOLTAGE, \
+ .modified = 1, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel2 = IIO_MOD_##rf_comp, \
+ .channel = _channel, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PHASE) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBSCALE) \
+ }
+
+#define ADMV1014_CHAN_IF(_channel, rf_comp) { \
+ .type = IIO_ALTVOLTAGE, \
+ .modified = 1, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel2 = IIO_MOD_##rf_comp, \
+ .channel = _channel, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PHASE) | \
+ BIT(IIO_CHAN_INFO_OFFSET) \
+ }
+
+#define ADMV1014_CHAN_POWER(_channel) { \
+ .type = IIO_POWER, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel = _channel, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE) \
+ }
+
+#define ADMV1014_CHAN_CALIBSCALE(_channel, rf_comp, _admv1014_ext_info) { \
+ .type = IIO_ALTVOLTAGE, \
+ .modified = 1, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel2 = IIO_MOD_##rf_comp, \
+ .channel = _channel, \
+ .ext_info = _admv1014_ext_info \
+ }
+
+static const struct iio_chan_spec admv1014_channels_iq[] = {
+ ADMV1014_CHAN_IQ(0, I),
+ ADMV1014_CHAN_IQ(0, Q),
+ ADMV1014_CHAN_POWER(0)
+};
+
+static const struct iio_chan_spec admv1014_channels_if[] = {
+ ADMV1014_CHAN_IF(0, I),
+ ADMV1014_CHAN_IF(0, Q),
+ ADMV1014_CHAN_CALIBSCALE(0, I, admv1014_ext_info),
+ ADMV1014_CHAN_CALIBSCALE(0, Q, admv1014_ext_info),
+ ADMV1014_CHAN_POWER(0)
+};
+
+static void admv1014_clk_disable(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+static void admv1014_powerdown(void *data)
+{
+ unsigned int enable_reg, enable_reg_msk;
+
+ /* Disable all components in the Enable Register */
+ enable_reg_msk = ADMV1014_IBIAS_PD_MSK |
+ ADMV1014_IF_AMP_PD_MSK |
+ ADMV1014_QUAD_BG_PD_MSK |
+ ADMV1014_BB_AMP_PD_MSK |
+ ADMV1014_QUAD_IBIAS_PD_MSK |
+ ADMV1014_BG_PD_MSK;
+
+ enable_reg = FIELD_PREP(ADMV1014_IBIAS_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_IF_AMP_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_QUAD_BG_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_BB_AMP_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_QUAD_IBIAS_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_BG_PD_MSK, 1);
+
+ admv1014_spi_update_bits(data, ADMV1014_REG_ENABLE,
+ enable_reg_msk, enable_reg);
+}
+
+static int admv1014_init(struct admv1014_state *st)
+{
+ int ret;
+ unsigned int chip_id, enable_reg, enable_reg_msk;
+ struct spi_device *spi = st->spi;
+
+ ret = regulator_bulk_enable(ADMV1014_NUM_REGULATORS, st->regulators);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable regulators");
+ goto error_disable_reg;
+ }
+
+ ret = clk_prepare_enable(st->clkin);
+ if (ret)
+ goto error_disable_reg;
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_clk_disable, st->clkin);
+ if (ret)
+ goto error_disable_reg;
+
+ st->nb.notifier_call = admv1014_freq_change;
+ ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
+ if (ret)
+ goto error_disable_reg;
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_powerdown, st);
+ if (ret)
+ goto error_disable_reg;
+
+ /* Perform a software reset */
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
+ ADMV1014_SPI_SOFT_RESET_MSK,
+ FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 1));
+ if (ret) {
+ dev_err(&spi->dev, "ADMV1014 SPI software reset failed.\n");
+ goto error_disable_reg;
+ }
+
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
+ ADMV1014_SPI_SOFT_RESET_MSK,
+ FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 0));
+ if (ret) {
+ dev_err(&spi->dev, "ADMV1014 SPI software reset disable failed.\n");
+ goto error_disable_reg;
+ }
+
+ ret = __admv1014_spi_write(st, ADMV1014_REG_VVA_TEMP_COMP, 0x727C);
+ if (ret) {
+ dev_err(&spi->dev, "Writing default Temperature Compensation value failed.\n");
+ goto error_disable_reg;
+ }
+
+ ret = __admv1014_spi_read(st, ADMV1014_REG_SPI_CONTROL, &chip_id);
+ if (ret)
+ goto error_disable_reg;
+
+ chip_id = (chip_id & ADMV1014_CHIP_ID_MSK) >> 4;
+ if (chip_id != ADMV1014_CHIP_ID) {
+ dev_err(&spi->dev, "Invalid Chip ID.\n");
+ ret = -EINVAL;
+ goto error_disable_reg;
+ }
+
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_QUAD,
+ ADMV1014_QUAD_SE_MODE_MSK,
+ FIELD_PREP(ADMV1014_QUAD_SE_MODE_MSK,
+ st->quad_se_mode));
+ if (ret) {
+ dev_err(&spi->dev, "Writing Quad SE Mode failed.\n");
+ goto error_disable_reg;
+ }
+
+ ret = admv1014_update_quad_filters(st);
+ if (ret) {
+ dev_err(&spi->dev, "Update Quad Filters failed.\n");
+ goto error_disable_reg;
+ }
+
+ ret = admv1014_update_vcm_settings(st);
+ if (ret) {
+ dev_err(&spi->dev, "Update VCM Settings failed.\n");
+ goto error_disable_reg;
+ }
+
+ enable_reg_msk = ADMV1014_P1DB_COMPENSATION_MSK |
+ ADMV1014_IF_AMP_PD_MSK |
+ ADMV1014_BB_AMP_PD_MSK |
+ ADMV1014_DET_EN_MSK;
+
+ enable_reg = FIELD_PREP(ADMV1014_P1DB_COMPENSATION_MSK, st->p1db_comp ? 3 : 0) |
+ FIELD_PREP(ADMV1014_IF_AMP_PD_MSK, !(st->input_mode)) |
+ FIELD_PREP(ADMV1014_BB_AMP_PD_MSK, st->input_mode) |
+ FIELD_PREP(ADMV1014_DET_EN_MSK, st->det_en);
+
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_ENABLE, enable_reg_msk, enable_reg);
+ if (ret)
+ goto error_disable_reg;
+
+ return 0;
+
+error_disable_reg:
+ regulator_bulk_disable(ADMV1014_NUM_REGULATORS, st->regulators);
+
+ return ret;
+}
+
+static int admv1014_properties_parse(struct admv1014_state *st)
+{
+ const char *str;
+ unsigned int i;
+ struct spi_device *spi = st->spi;
+ int ret;
+
+ st->det_en = device_property_read_bool(&spi->dev, "adi,detector-enable");
+
+ st->p1db_comp = device_property_read_bool(&spi->dev, "adi,p1db-compensation-enable");
+
+ str = "iq";
+ device_property_read_string(&spi->dev, "adi,input-mode", &str);
+
+ if (!strcmp(str, "iq"))
+ st->input_mode = ADMV1014_IQ_MODE;
+ else if (!strcmp(str, "if"))
+ st->input_mode = ADMV1014_IF_MODE;
+ else
+ return -EINVAL;
+
+ str = "diff";
+ device_property_read_string(&spi->dev, "adi,quad-se-mode", &str);
+
+ if (!strcmp(str, "diff"))
+ st->quad_se_mode = ADMV1014_SE_MODE_DIFF;
+ else if (!strcmp(str, "se-pos"))
+ st->quad_se_mode = ADMV1014_SE_MODE_POS;
+ else if (!strcmp(str, "se-neg"))
+ st->quad_se_mode = ADMV1014_SE_MODE_NEG;
+ else
+ return -EINVAL;
+
+ for (i = 0; i < ADMV1014_NUM_REGULATORS; ++i)
+ st->regulators[i].supply = admv1014_reg_name[i];
+
+ ret = devm_regulator_bulk_get(&st->spi->dev, ADMV1014_NUM_REGULATORS,
+ st->regulators);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to request regulators");
+ return ret;
+ }
+
+ st->clkin = devm_clk_get(&spi->dev, "lo_in");
+ if (IS_ERR(st->clkin))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
+ "failed to get the LO input clock\n");
+
+ return 0;
+}
+
+static int admv1014_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct admv1014_state *st;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+
+ ret = admv1014_properties_parse(st);
+ if (ret)
+ return ret;
+
+ indio_dev->info = &admv1014_info;
+ indio_dev->name = "admv1014";
+
+ if (st->input_mode == ADMV1014_IQ_MODE) {
+ indio_dev->channels = admv1014_channels_iq;
+ indio_dev->num_channels = ARRAY_SIZE(admv1014_channels_iq);
+ } else {
+ indio_dev->channels = admv1014_channels_if;
+ indio_dev->num_channels = ARRAY_SIZE(admv1014_channels_if);
+ }
+
+ st->spi = spi;
+
+ mutex_init(&st->lock);
+
+ ret = admv1014_init(st);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static const struct spi_device_id admv1014_id[] = {
+ { "admv1014", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, admv1014_id);
+
+static const struct of_device_id admv1014_of_match[] = {
+ { .compatible = "adi,admv1014" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, admv1014_of_match);
+
+static struct spi_driver admv1014_driver = {
+ .driver = {
+ .name = "admv1014",
+ .of_match_table = admv1014_of_match,
+ },
+ .probe = admv1014_probe,
+ .id_table = admv1014_id,
+};
+module_spi_driver(admv1014_driver);
+
+MODULE_AUTHOR("Antoniu Miclaus <[email protected]");
+MODULE_DESCRIPTION("Analog Devices ADMV1014");
+MODULE_LICENSE("GPL v2");
--
2.35.0
Add documentation for the use of the Digital Attenuator gain.
Signed-off-by: Antoniu Miclaus <[email protected]>
---
changes in v4:
- move `in_altvoltage_calibscale` to sysfs-bus-iio
Documentation/ABI/testing/sysfs-bus-iio | 7 ++++++
.../testing/sysfs-bus-iio-frequency-admv1014 | 23 +++++++++++++++++++
2 files changed, 30 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index c551301b33f1..d7d96d3d6b7c 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -476,6 +476,13 @@ What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale
What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale
What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale
What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale
+What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage_calibscale
+KernelVersion:
+Contact: [email protected]
+Description:
+ Used in microwave converters to read/write value for the
+ digital attenuator gain (I/Q mode).
+
What: /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014 b/Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014
new file mode 100644
index 000000000000..5bcd96d77f45
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014
@@ -0,0 +1,23 @@
+What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_i_calibscale_coarse
+KernelVersion:
+Contact: [email protected]
+Description:
+ Read/write value for the digital attenuator gain (IF_I) with coarse steps.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_q_calibscale_coarse
+KernelVersion:
+Contact: [email protected]
+Description:
+ Read/write value for the digital attenuator gain (IF_Q) with coarse steps.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_i_calibscale_fine
+KernelVersion:
+Contact: [email protected]
+Description:
+ Read/write value for the digital attenuator gain (IF_I) with fine steps.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_q_calibscale_fine
+KernelVersion:
+Contact: [email protected]
+Description:
+ Read/write value for the digital attenuator gain (IF_Q) with fine steps.
--
2.35.0
Add myself as maintainer for the ADMV1014 driver.
Signed-off-by: Antoniu Miclaus <[email protected]>
---
MAINTAINERS | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 170bbbeefc3f..b05148cfd4aa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1119,6 +1119,14 @@ W: http://ez.analog.com/community/linux-device-drivers
F: Documentation/devicetree/bindings/hwmon/adi,adm1177.yaml
F: drivers/hwmon/adm1177.c
+ANALOG DEVICES INC ADMV1014 DRIVER
+M: Antoniu Miclaus <[email protected]>
+L: [email protected]
+S: Supported
+W: https://ez.analog.com/linux-software-drivers
+F: Documentation/devicetree/bindings/iio/frequency/adi,admv1014.yaml
+F: drivers/iio/frequency/admv1014.c
+
ANALOG DEVICES INC ADP5061 DRIVER
M: Michael Hennerich <[email protected]>
L: [email protected]
--
2.35.0
On Thu, 27 Jan 2022 12:55:55 +0200
Antoniu Miclaus <[email protected]> wrote:
> The ADMV1014 is a silicon germanium (SiGe), wideband,
> microwave downconverter optimized for point to point microwave
> radio designs operating in the 24 GHz to 44 GHz frequency range.
>
> Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADMV1014.pdf
> Signed-off-by: Antoniu Miclaus <[email protected]>
> ---
> changes in v4:
> - make regulators mandatory
> - use regulator bulk get/enable
The error handling and remove paths for these aren't correct. See inline.
So nearly there. I thought about fixing it up, but it's just beyond the boundary
of the sort of change I'll make whilst applying. Sightly too complex.
Thanks,
Jonathan
> drivers/iio/frequency/Kconfig | 10 +
> drivers/iio/frequency/Makefile | 1 +
> drivers/iio/frequency/admv1014.c | 820 +++++++++++++++++++++++++++++++
> 3 files changed, 831 insertions(+)
> create mode 100644 drivers/iio/frequency/admv1014.c
>
...
> diff --git a/drivers/iio/frequency/admv1014.c b/drivers/iio/frequency/admv1014.c
> new file mode 100644
> index 000000000000..4ae422bd9bf4
> --- /dev/null
> +++ b/drivers/iio/frequency/admv1014.c
> @@ -0,0 +1,820 @@
...
> +static int admv1014_init(struct admv1014_state *st)
> +{
> + int ret;
> + unsigned int chip_id, enable_reg, enable_reg_msk;
> + struct spi_device *spi = st->spi;
> +
> + ret = regulator_bulk_enable(ADMV1014_NUM_REGULATORS, st->regulators);
> + if (ret) {
> + dev_err(&spi->dev, "Failed to enable regulators");
> + goto error_disable_reg;
Firstly, you shouldn't be calling regulator_bulk_disable() if regulator_bulk_enable()
has failed as like vast majority of such functions if it returns an error code
it should have done it's own cleanup (disabled any regulators it had enable before
the error happened)
Secondly there is no disabling of the regulators in error paths other than in this
function or in the module remove path. Given everything else is managed
you need a devm_add_action_or_reset() with appropriate callback to disable
these regulators in both error and remove paths.
> + }
> +
> + ret = clk_prepare_enable(st->clkin);
> + if (ret)
> + goto error_disable_reg;
> +
> + ret = devm_add_action_or_reset(&spi->dev, admv1014_clk_disable, st->clkin);
> + if (ret)
> + goto error_disable_reg;
> +
> + st->nb.notifier_call = admv1014_freq_change;
> + ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
> + if (ret)
> + goto error_disable_reg;
> +
> + ret = devm_add_action_or_reset(&spi->dev, admv1014_powerdown, st);
> + if (ret)
> + goto error_disable_reg;
> +
> + /* Perform a software reset */
> + ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
> + ADMV1014_SPI_SOFT_RESET_MSK,
> + FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 1));
> + if (ret) {
> + dev_err(&spi->dev, "ADMV1014 SPI software reset failed.\n");
> + goto error_disable_reg;
> + }
> +
> + ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
> + ADMV1014_SPI_SOFT_RESET_MSK,
> + FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 0));
> + if (ret) {
> + dev_err(&spi->dev, "ADMV1014 SPI software reset disable failed.\n");
> + goto error_disable_reg;
> + }
> +
> + ret = __admv1014_spi_write(st, ADMV1014_REG_VVA_TEMP_COMP, 0x727C);
> + if (ret) {
> + dev_err(&spi->dev, "Writing default Temperature Compensation value failed.\n");
> + goto error_disable_reg;
> + }
> +
> + ret = __admv1014_spi_read(st, ADMV1014_REG_SPI_CONTROL, &chip_id);
> + if (ret)
> + goto error_disable_reg;
> +
> + chip_id = (chip_id & ADMV1014_CHIP_ID_MSK) >> 4;
> + if (chip_id != ADMV1014_CHIP_ID) {
> + dev_err(&spi->dev, "Invalid Chip ID.\n");
> + ret = -EINVAL;
> + goto error_disable_reg;
> + }
> +
> + ret = __admv1014_spi_update_bits(st, ADMV1014_REG_QUAD,
> + ADMV1014_QUAD_SE_MODE_MSK,
> + FIELD_PREP(ADMV1014_QUAD_SE_MODE_MSK,
> + st->quad_se_mode));
> + if (ret) {
> + dev_err(&spi->dev, "Writing Quad SE Mode failed.\n");
> + goto error_disable_reg;
> + }
> +
> + ret = admv1014_update_quad_filters(st);
> + if (ret) {
> + dev_err(&spi->dev, "Update Quad Filters failed.\n");
> + goto error_disable_reg;
> + }
> +
> + ret = admv1014_update_vcm_settings(st);
> + if (ret) {
> + dev_err(&spi->dev, "Update VCM Settings failed.\n");
> + goto error_disable_reg;
> + }
> +
> + enable_reg_msk = ADMV1014_P1DB_COMPENSATION_MSK |
> + ADMV1014_IF_AMP_PD_MSK |
> + ADMV1014_BB_AMP_PD_MSK |
> + ADMV1014_DET_EN_MSK;
> +
> + enable_reg = FIELD_PREP(ADMV1014_P1DB_COMPENSATION_MSK, st->p1db_comp ? 3 : 0) |
> + FIELD_PREP(ADMV1014_IF_AMP_PD_MSK, !(st->input_mode)) |
> + FIELD_PREP(ADMV1014_BB_AMP_PD_MSK, st->input_mode) |
> + FIELD_PREP(ADMV1014_DET_EN_MSK, st->det_en);
> +
> + ret = __admv1014_spi_update_bits(st, ADMV1014_REG_ENABLE, enable_reg_msk, enable_reg);
> + if (ret)
> + goto error_disable_reg;
> +
> + return 0;
> +
> +error_disable_reg:
> + regulator_bulk_disable(ADMV1014_NUM_REGULATORS, st->regulators);
This now doesn't happen in the remove path.
you need to use a devm_add_action_or_reset() with appropriate callback
to clean these up.
> +
> + return ret;
> +}
> +
...
> +static int admv1014_probe(struct spi_device *spi)
> +{
> + struct iio_dev *indio_dev;
> + struct admv1014_state *st;
> + int ret;
> +
> + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + st = iio_priv(indio_dev);
> +
> + ret = admv1014_properties_parse(st);
> + if (ret)
> + return ret;
> +
> + indio_dev->info = &admv1014_info;
> + indio_dev->name = "admv1014";
> +
> + if (st->input_mode == ADMV1014_IQ_MODE) {
> + indio_dev->channels = admv1014_channels_iq;
> + indio_dev->num_channels = ARRAY_SIZE(admv1014_channels_iq);
> + } else {
> + indio_dev->channels = admv1014_channels_if;
> + indio_dev->num_channels = ARRAY_SIZE(admv1014_channels_if);
> + }
> +
> + st->spi = spi;
> +
> + mutex_init(&st->lock);
> +
> + ret = admv1014_init(st);
> + if (ret)
> + return ret;
> +
> + return devm_iio_device_register(&spi->dev, indio_dev);
If this call fails regulators are left on. If you use
devm_add_action_or_reset() magic then they won't be as that callback
will get called in the error handling for the function that called
probe()
> +}
> +
On Thu, 27 Jan 2022 12:55:57 +0200
Antoniu Miclaus <[email protected]> wrote:
> Add documentation for the use of the Digital Attenuator gain.
>
> Signed-off-by: Antoniu Miclaus <[email protected]>
> ---
> changes in v4:
> - move `in_altvoltage_calibscale` to sysfs-bus-iio
> Documentation/ABI/testing/sysfs-bus-iio | 7 ++++++
> .../testing/sysfs-bus-iio-frequency-admv1014 | 23 +++++++++++++++++++
> 2 files changed, 30 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
> index c551301b33f1..d7d96d3d6b7c 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio
> +++ b/Documentation/ABI/testing/sysfs-bus-iio
> @@ -476,6 +476,13 @@ What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale
> What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale
> What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale
> What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale
> +What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage_calibscale
> +KernelVersion:
> +Contact: [email protected]
> +Description:
> + Used in microwave converters to read/write value for the
> + digital attenuator gain (I/Q mode).
> +
You can't add description etc in the middle of a load of What: entries like this.
Just add the What line. The generic description text should be sufficient.
> What: /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
> What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
> What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014 b/Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014
> new file mode 100644
> index 000000000000..5bcd96d77f45
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-bus-iio-frequency-admv1014
> @@ -0,0 +1,23 @@
> +What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_i_calibscale_coarse
> +KernelVersion:
Fill these in. If something odd happens to delay it getting merged I can fix them up, but
I may well forget to fill them in if left empty. Basically make life easy for me in the
common case. This 'should' be 5.18 material.
> +Contact: [email protected]
> +Description:
> + Read/write value for the digital attenuator gain (IF_I) with coarse steps.
> +
> +What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_q_calibscale_coarse
> +KernelVersion:
> +Contact: [email protected]
> +Description:
> + Read/write value for the digital attenuator gain (IF_Q) with coarse steps.
> +
> +What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_i_calibscale_fine
> +KernelVersion:
> +Contact: [email protected]
> +Description:
> + Read/write value for the digital attenuator gain (IF_I) with fine steps.
> +
> +What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage0_q_calibscale_fine
> +KernelVersion:
> +Contact: [email protected]
> +Description:
> + Read/write value for the digital attenuator gain (IF_Q) with fine steps.