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Date: Sun, 20 Feb 2022 12:14:14 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Antoniu Miclaus <antoniu.miclaus@...log.com>
Cc: <robh+dt@...nel.org>, <linux-iio@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 1/4] iio:frequency:admv1014: add support for ADMV1014
On Tue, 15 Feb 2022 10:12:13 +0200
Antoniu Miclaus <antoniu.miclaus@...log.com> 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 <antoniu.miclaus@...log.com>
Hi Antoniu.
One really trivial point inline that I noticed whilst having 'one last look'.
I'll fix it up whilst applying but please check I didn't mess up!
Series applied to the togreg branch of iio.git and initially pushed out as
testing to let 0-day poke at it an see if it can find anything we missed.
Thanks,
Jonathan
> ---
> changes in v8:
> - remove clk-provider header
> drivers/iio/frequency/Kconfig | 10 +
> drivers/iio/frequency/Makefile | 1 +
> drivers/iio/frequency/admv1014.c | 823 +++++++++++++++++++++++++++++++
> 3 files changed, 834 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..06a60c246161
> --- /dev/null
> +++ b/drivers/iio/frequency/admv1014.c
> @@ -0,0 +1,823 @@
> +// 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/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
...
> +
> +static int admv1014_init(struct admv1014_state *st)
> +{
> + unsigned int chip_id, enable_reg, enable_reg_msk;
> + struct spi_device *spi = st->spi;
> + int ret;
> +
> + ret = regulator_bulk_enable(ADMV1014_NUM_REGULATORS, st->regulators);
> + if (ret) {
> + dev_err(&spi->dev, "Failed to enable regulators");
> + return ret;
> + }
> +
> + ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->regulators);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(st->clkin);
> + if (ret)
> + return ret;
> +
> + ret = devm_add_action_or_reset(&spi->dev, admv1014_clk_disable, st->clkin);
> + if (ret)
> + return ret;
> +
> + st->nb.notifier_call = admv1014_freq_change;
> + ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
> + if (ret)
> + return ret;
> +
> + ret = devm_add_action_or_reset(&spi->dev, admv1014_powerdown, st);
> + if (ret)
> + return ret;
> +
> + /* 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");
> + return ret;
> + }
> +
> + 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");
> + return ret;
> + }
> +
> + ret = __admv1014_spi_write(st, ADMV1014_REG_VVA_TEMP_COMP, 0x727C);
> + if (ret) {
> + dev_err(&spi->dev, "Writing default Temperature Compensation value failed.\n");
> + return ret;
> + }
> +
> + ret = __admv1014_spi_read(st, ADMV1014_REG_SPI_CONTROL, &chip_id);
> + if (ret)
> + return ret;
> +
> + chip_id = (chip_id & ADMV1014_CHIP_ID_MSK) >> 4;
Trivial but this could be a FIELD_GET()
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