[PATCH 2/4] iio: frequency: adf4377: add support for ADF4377
From: Antoniu Miclaus
Date: Fri Nov 04 2022 - 05:29:14 EST
The ADF4377 is a high performance, ultralow jitter, dual output integer-N
phased locked loop (PLL) with integrated voltage controlled oscillator
(VCO) ideally suited for data converter and mixed signal front end (MxFE)
clock applications.
Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/adf4377.pdf
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>
---
drivers/iio/frequency/Kconfig | 10 +
drivers/iio/frequency/Makefile | 1 +
drivers/iio/frequency/adf4377.c | 1154 +++++++++++++++++++++++++++++++
3 files changed, 1165 insertions(+)
create mode 100644 drivers/iio/frequency/adf4377.c
diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig
index f3702f36436c..9e85dfa58508 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 ADF4377
+ tristate "Analog Devices ADF4377 Microwave Wideband Synthesizer"
+ depends on SPI && COMMON_CLK
+ help
+ Say yes here to build support for Analog Devices ADF4377 Microwave
+ Wideband Synthesizer.
+
+ To compile this driver as a module, choose M here: the
+ module will be called adf4377.
+
config ADMV1013
tristate "Analog Devices ADMV1013 Microwave Upconverter"
depends on SPI && COMMON_CLK
diff --git a/drivers/iio/frequency/Makefile b/drivers/iio/frequency/Makefile
index 48add732f1d3..b616c29b4a08 100644
--- a/drivers/iio/frequency/Makefile
+++ b/drivers/iio/frequency/Makefile
@@ -7,6 +7,7 @@
obj-$(CONFIG_AD9523) += ad9523.o
obj-$(CONFIG_ADF4350) += adf4350.o
obj-$(CONFIG_ADF4371) += adf4371.o
+obj-$(CONFIG_ADF4377) += adf4377.o
obj-$(CONFIG_ADMV1013) += admv1013.o
obj-$(CONFIG_ADMV1014) += admv1014.o
obj-$(CONFIG_ADMV4420) += admv4420.o
diff --git a/drivers/iio/frequency/adf4377.c b/drivers/iio/frequency/adf4377.c
new file mode 100644
index 000000000000..1901dde1003e
--- /dev/null
+++ b/drivers/iio/frequency/adf4377.c
@@ -0,0 +1,1154 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADF4377 driver
+ *
+ * Copyright 2022 Analog Devices Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <linux/iio/iio.h>
+#include <linux/regmap.h>
+#include <linux/units.h>
+
+#include <linux/gpio/consumer.h>
+
+/* ADF4377 REG0000 Map */
+#define ADF4377_SOFT_RESET_R_MSK BIT(7)
+#define ADF4377_LSB_FIRST_R_MSK BIT(6)
+#define ADF4377_ADDRESS_ASC_R_MSK BIT(5)
+#define ADF4377_SDO_ACTIVE_R_MSK BIT(4)
+#define ADF4377_SDO_ACTIVE_MSK BIT(3)
+#define ADF4377_ADDRESS_ASC_MSK BIT(2)
+#define ADF4377_LSB_FIRST_MSK BIT(1)
+#define ADF4377_SOFT_RESET_MSK BIT(0)
+
+/* ADF4377 REG0000 Bit Definition */
+#define ADF4377_SDO_ACTIVE_SPI_3W 0x0
+#define ADF4377_SDO_ACTIVE_SPI_4W 0x1
+
+#define ADF4377_ADDR_ASC_AUTO_DECR 0x0
+#define ADF4377_ADDR_ASC_AUTO_INCR 0x1
+
+#define ADF4377_LSB_FIRST_MSB 0x0
+#define ADF4377_LSB_FIRST_LSB 0x1
+
+#define ADF4377_SOFT_RESET_N_OP 0x0
+#define ADF4377_SOFT_RESET_EN 0x1
+
+/* ADF4377 REG0001 Map */
+#define ADF4377_SINGLE_INSTR_MSK BIT(7)
+#define ADF4377_MASTER_RB_CTRL_MSK BIT(5)
+
+/* ADF4377 REG0001 Bit Definition */
+#define ADF4377_SPI_STREAM_EN 0x0
+#define ADF4377_SPI_STREAM_DIS 0x1
+
+#define ADF4377_RB_SLAVE_REG 0x0
+#define ADF4377_RB_MASTER_REG 0x1
+
+/* ADF4377 REG0003 Bit Definition */
+#define ADF4377_CHIP_TYPE 0x06
+
+/* ADF4377 REG0004 Bit Definition */
+#define ADF4377_PRODUCT_ID_LSB 0x0005
+
+/* ADF4377 REG0005 Bit Definition */
+#define ADF4377_PRODUCT_ID_MSB 0x0005
+
+/* ADF4377 REG000A Map */
+#define ADF4377_SCRATCHPAD_MSK GENMASK(7, 0)
+
+/* ADF4377 REG000C Bit Definition */
+#define ADF4377_VENDOR_ID_LSB 0x56
+
+/* ADF4377 REG000D Bit Definition */
+#define ADF4377_VENDOR_ID_MSB 0x04
+
+/* ADF4377 REG000F Bit Definition */
+#define ADF4377_R00F_RSV1_MSK GENMASK(7, 0)
+
+/* ADF4377 REG0010 Map*/
+#define ADF4377_N_INT_LSB_MSK GENMASK(7, 0)
+
+/* ADF4377 REG0011 Map*/
+#define ADF4377_EN_AUTOCAL_MSK BIT(7)
+#define ADF4377_EN_RDBLR_MSK BIT(6)
+#define ADF4377_DCLK_DIV2_MSK GENMASK(5, 4)
+#define ADF4377_N_INT_MSB_MSK GENMASK(3, 0)
+
+/* ADF4377 REG0011 Bit Definition */
+#define ADF4377_VCO_CALIB_DIS 0x0
+#define ADF4377_VCO_CALIB_EN 0x1
+
+#define ADF4377_REF_DBLR_DIS 0x0
+#define ADF4377_REF_DBLR_EN 0x1
+
+#define ADF4377_DCLK_DIV2_1 0x0
+#define ADF4377_DCLK_DIV2_2 0x1
+#define ADF4377_DCLK_DIV2_4 0x2
+#define ADF4377_DCLK_DIV2_8 0x3
+
+/* ADF4377 REG0012 Map*/
+#define ADF4377_CLKOUT_DIV_MSK GENMASK(7, 6)
+#define ADF4377_R_DIV_MSK GENMASK(5, 0)
+
+/* ADF4377 REG0012 Bit Definition */
+#define ADF4377_CLKOUT_DIV_1 0x0
+#define ADF4377_CLKOUT_DIV_2 0x1
+#define ADF4377_CLKOUT_DIV_4 0x2
+#define ADF4377_CLKOUT_DIV_8 0x3
+
+/* ADF4377 REG0013 Map */
+#define ADF4377_M_VCO_CORE_MSK GENMASK(5, 4)
+#define ADF4377_M_VCO_BIAS_MSK GENMASK(3, 0)
+
+/* ADF4377 REG0013 Bit Definition */
+#define ADF4377_M_VCO_0 0x0
+#define ADF4377_M_VCO_1 0x1
+#define ADF4377_M_VCO_2 0x2
+#define ADF4377_M_VCO_3 0x3
+
+/* ADF4377 REG0014 Map */
+#define ADF4377_M_VCO_BAND_MSK GENMASK(7, 0)
+
+/* ADF4377 REG0015 Map */
+#define ADF4377_BLEED_I_LSB_MSK GENMASK(7, 6)
+#define ADF4377_BLEED_POL_MSK BIT(5)
+#define ADF4377_EN_BLEED_MSK BIT(4)
+#define ADF4377_CP_I_MSK GENMASK(3, 0)
+
+/* ADF4377 REG0015 Bit Definition */
+#define ADF4377_CURRENT_SINK 0x0
+#define ADF4377_CURRENT_SOURCE 0x1
+
+#define ADF4377_BLEED_CURR_DIS 0x0
+#define ADF4377_BLEED_CURR_EN 0x1
+
+#define ADF4377_CP_0MA7 0x0
+#define ADF4377_CP_0MA9 0x1
+#define ADF4377_CP_1MA1 0x2
+#define ADF4377_CP_1MA3 0x3
+#define ADF4377_CP_1MA4 0x4
+#define ADF4377_CP_1MA8 0x5
+#define ADF4377_CP_2MA2 0x6
+#define ADF4377_CP_2MA5 0x7
+#define ADF4377_CP_2MA9 0x8
+#define ADF4377_CP_3MA6 0x9
+#define ADF4377_CP_4MA3 0xA
+#define ADF4377_CP_5MA0 0xB
+#define ADF4377_CP_5MA7 0xC
+#define ADF4377_CP_7MA2 0xD
+#define ADF4377_CP_8MA6 0xE
+#define ADF4377_CP_10MA1 0xF
+
+/* ADF4377 REG0016 Map */
+#define ADF4377_BLEED_I_MSB_MSK GENMASK(7, 0)
+
+/* ADF4377 REG0017 Map */
+#define ADF4377_INV_CLKOUT_MSK BIT(7)
+#define ADF4377_N_DEL_MSK GENMASK(6, 0)
+
+/* ADF4377 REG0017 Bit Definition */
+#define ADF4377_CLKOUT_INV_DIS 0x0
+#define ADF4377_CLKOUT_INV_EN 0x1
+
+/* ADF4377 REG0018 Map */
+#define ADF4377_CMOS_OV_MSK BIT(7)
+#define ADF4377_R_DEL_MSK GENMASK(6, 0)
+
+/* ADF4377 REG0018 Bit Definition */
+#define ADF4377_1V8_LOGIC 0x0
+#define ADF4377_3V3_LOGIC 0x1
+
+/* ADF4377 REG0019 Map */
+#define ADF4377_CLKOUT2_OP_MSK GENMASK(7, 6)
+#define ADF4377_CLKOUT1_OP_MSK GENMASK(5, 4)
+#define ADF4377_PD_CLK_MSK BIT(3)
+#define ADF4377_PD_RDET_MSK BIT(2)
+#define ADF4377_PD_ADC_MSK BIT(1)
+#define ADF4377_PD_CALADC_MSK BIT(0)
+
+/* ADF4377 REG0019 Bit Definition */
+#define ADF4377_CLKOUT_320MV 0x0
+#define ADF4377_CLKOUT_420MV 0x1
+#define ADF4377_CLKOUT_530MV 0x2
+#define ADF4377_CLKOUT_640MV 0x3
+
+#define ADF4377_PD_CLK_N_OP 0x0
+#define ADF4377_PD_CLK_PD 0x1
+
+#define ADF4377_PD_RDET_N_OP 0x0
+#define ADF4377_PD_RDET_PD 0x1
+
+#define ADF4377_PD_ADC_N_OP 0x0
+#define ADF4377_PD_ADC_PD 0x1
+
+#define ADF4377_PD_CALADC_N_OP 0x0
+#define ADF4377_PD_CALADC_PD 0x1
+
+/* ADF4377 REG001A Map */
+#define ADF4377_PD_ALL_MSK BIT(7)
+#define ADF4377_PD_RDIV_MSK BIT(6)
+#define ADF4377_PD_NDIV_MSK BIT(5)
+#define ADF4377_PD_VCO_MSK BIT(4)
+#define ADF4377_PD_LD_MSK BIT(3)
+#define ADF4377_PD_PFDCP_MSK BIT(2)
+#define ADF4377_PD_CLKOUT1_MSK BIT(1)
+#define ADF4377_PD_CLKOUT2_MSK BIT(0)
+
+/* ADF4377 REG001A Bit Definition */
+#define ADF4377_PD_ALL_N_OP 0x0
+#define ADF4377_PD_ALL_PD 0x1
+
+#define ADF4377_PD_RDIV_N_OP 0x0
+#define ADF4377_PD_RDIV_PD 0x1
+
+#define ADF4377_PD_NDIV_N_OP 0x0
+#define ADF4377_PD_NDIV_PD 0x1
+
+#define ADF4377_PD_VCO_N_OP 0x0
+#define ADF4377_PD_VCO_PD 0x1
+
+#define ADF4377_PD_LD_N_OP 0x0
+#define ADF4377_PD_LD_PD 0x1
+
+#define ADF4377_PD_PFDCP_N_OP 0x0
+#define ADF4377_PD_PFDCP_PD 0x1
+
+#define ADF4377_PD_CLKOUT1_N_OP 0x0
+#define ADF4377_PD_CLKOUT1_PD 0x1
+
+#define ADF4377_PD_CLKOUT2_N_OP 0x0
+#define ADF4377_PD_CLKOUT2_PD 0x1
+
+/* ADF4377 REG001B Map */
+#define ADF4377_EN_LOL_MSK BIT(7)
+#define ADF4377_LDWIN_PW_MSK BIT(6)
+#define ADF4377_EN_LDWIN_MSK BIT(5)
+#define ADF4377_LD_COUNT_MSK GENMASK(4, 0)
+
+/* ADF4377 REG001B Bit Definition */
+#define ADF4377_EN_LOL_DIS 0x0
+#define ADF4377_EN_LOL_EN 0x1
+
+#define ADF4377_LDWIN_PW_NARROW 0x0
+#define ADF4377_LDWIN_PW_WIDE 0x1
+
+#define ADF4377_EN_LDWIN_DIS 0x0
+#define ADF4377_EN_LDWIN_EN 0x1
+
+/* ADF4377 REG001C Map */
+#define ADF4377_EN_DNCLK_MSK BIT(7)
+#define ADF4377_EN_DRCLK_MSK BIT(6)
+#define ADF4377_RST_LD_MSK BIT(2)
+#define ADF4377_R01C_RSV1_MSK BIT(0)
+
+/* ADF4377 REG001C Bit Definition */
+#define ADF4377_EN_DNCLK_OFF 0x0
+#define ADF4377_EN_DNCLK_ON 0x1
+
+#define ADF4377_EN_DRCLK_OFF 0x0
+#define ADF4377_EN_DRCLK_ON 0x1
+
+#define ADF4377_RST_LD_INACTIVE 0x0
+#define ADF4377_RST_LD_ACTIVE 0x1
+
+/* ADF4377 REG001D Map */
+#define ADF4377_MUXOUT_MSK GENMASK(7, 4)
+#define ADF4377_EN_CPTEST_MSK BIT(2)
+#define ADF4377_CP_DOWN_MSK BIT(1)
+#define ADF4377_CP_UP_MSK BIT(0)
+
+#define ADF4377_EN_CPTEST_OFF 0x0
+#define ADF4377_EN_CPTEST_ON 0x1
+
+#define ADF4377_CP_DOWN_OFF 0x0
+#define ADF4377_CP_DOWN_ON 0x1
+
+#define ADF4377_CP_UP_OFF 0x0
+#define ADF4377_CP_UP_ON 0x1
+
+/* ADF4377 REG001F Map */
+#define ADF4377_BST_REF_MSK BIT(7)
+#define ADF4377_FILT_REF_MSK BIT(6)
+#define ADF4377_REF_SEL_MSK BIT(5)
+#define ADF4377_R01F_RSV1_MSK GENMASK(4, 0)
+
+/* ADF4377 REG001F Bit Definition */
+#define ADF4377_BST_LARGE_REF_IN 0x0
+#define ADF4377_BST_SMALL_REF_IN 0x1
+
+#define ADF4377_FILT_REF_OFF 0x0
+#define ADF4377_FILT_REF_ON 0x1
+
+#define ADF4377_REF_SEL_DMA 0x0
+#define ADF4377_REF_SEL_LNA 0x1
+
+/* ADF4377 REG0020 Map */
+#define ADF4377_RST_SYS_MSK BIT(4)
+#define ADF4377_EN_ADC_CLK_MSK BIT(3)
+#define ADF4377_R020_RSV1_MSK BIT(0)
+
+/* ADF4377 REG0020 Bit Definition */
+#define ADF4377_RST_SYS_INACTIVE 0x0
+#define ADF4377_RST_SYS_ACTIVE 0x1
+
+#define ADF4377_EN_ADC_CLK_DIS 0x0
+#define ADF4377_EN_ADC_CLK_EN 0x1
+
+/* ADF4377 REG0021 Bit Definition */
+#define ADF4377_R021_RSV1 0xD3
+
+/* ADF4377 REG0022 Bit Definition */
+#define ADF4377_R022_RSV1 0x32
+
+/* ADF4377 REG0023 Map */
+#define ADF4377_CAT_CT_SEL BIT(7)
+#define ADF4377_R023_RSV1_MSK GENMASK(6, 0)
+
+/* ADF4377 REG0024 Map */
+#define ADF4377_DCLK_MODE_MSK BIT(2)
+
+/* ADF4377 REG0024 Bit Definition */
+#define ADF4377_DCLK_MODE_DIS 0x0
+#define ADF4377_DCLK_MODE_EN 0x1
+
+/* ADF4377 REG0025 Map */
+#define ADF4377_CLKODIV_DB_MSK BIT(7)
+#define ADF4377_DCLK_DB_MSK BIT(6)
+#define ADF4377_R025_RSV1_MSK GENMASK(5, 0)
+
+/* ADF4377 REG0025 Bit Definition */
+#define ADF4377_CLKODIV_DB_DIS 0x0
+#define ADF4377_CLKODIV_DB_EN 0x1
+
+#define ADF4377_DCLK_DIV_DB_DIS 0x0
+#define ADF4377_DCLK_DIV_DB_EN 0x1
+
+/* ADF4377 REG0026 Map */
+#define ADF4377_VCO_BAND_DIV_MSK GENMASK(7, 0)
+
+/* ADF4377 REG0027 Map */
+#define ADF4377_SYNTH_LOCK_TO_LSB_MSK GENMASK(7, 0)
+
+/* ADF4377 REG0028 Map */
+#define ADF4377_O_VCO_DB_MSK BIT(7)
+#define ADF4377_SYNTH_LOCK_TO_MSB_MSK GENMASK(6, 0)
+
+/* ADF4377 REG0028 Bit Definition */
+#define ADF4377_O_VCO_DB_DIS 0x0
+#define ADF4377_O_VCO_DB_EN 0x1
+
+/* ADF4377 REG0029 Map */
+#define ADF4377_VCO_ALC_TO_LSB_MSK GENMASK(7, 0)
+
+/* ADF4377 REG002A Map */
+#define ADF4377_DEL_CTRL_DB_MSK BIT(7)
+#define ADF4377_VCO_ALC_TO_MSB_MSK GENMASK(6, 0)
+
+/* ADF4377 REG002A Bit Definition */
+#define ADF4377_DEL_CTRL_DB_DIS 0x0
+#define ADF4377_DEL_CTRL_DB_EN 0x1
+
+/* ADF4377 REG002C Map */
+#define ADF4377_R02C_RSV1 0xC0
+
+/* ADF4377 REG002D Map */
+#define ADF4377_ADC_CLK_DIV_MSK GENMASK(7, 0)
+
+/* ADF4377 REG002E Map */
+#define ADF4377_EN_ADC_CNV_MSK BIT(7)
+#define ADF4377_EN_ADC_MSK BIT(1)
+#define ADF4377_ADC_A_CONV_MSK BIT(0)
+
+/* ADF4377 REG002E Bit Definition */
+#define ADF4377_EN_ADC_CNV_DIS 0x0
+#define ADF4377_EN_ADC_CNV_EN 0x1
+
+#define ADF4377_EN_ADC_DIS 0x0
+#define ADF4377_EN_ADC_EN 0x1
+
+#define ADF4377_ADC_A_CONV_ADC_ST_CNV 0x0
+#define ADF4377_ADC_A_CONV_VCO_CALIB 0x1
+
+/* ADF4377 REG002F Map */
+#define ADF4377_DCLK_DIV1_MSK GENMASK(1, 0)
+
+/* ADF4377 REG002F Bit Definition */
+#define ADF4377_DCLK_DIV1_1 0x0
+#define ADF4377_DCLK_DIV1_2 0x1
+#define ADF4377_DCLK_DIV1_8 0x2
+#define ADF4377_DCLK_DIV1_32 0x3
+
+/* ADF4377 REG0031 Bit Definition */
+#define ADF4377_R031_RSV1 0x09
+
+/* ADF4377 REG0032 Map */
+#define ADF4377_ADC_CLK_SEL_MSK BIT(6)
+#define ADF4377_R032_RSV1_MSK GENMASK(5, 0)
+
+/* ADF4377 REG0032 Bit Definition */
+#define ADF4377_R032_RSV1 0x9
+
+/* ADF4377 REG0032 Bit Definition */
+#define ADF4377_ADC_CLK_SEL_N_OP 0x0
+#define ADF4377_ADC_CLK_SEL_SPI_CLK 0x1
+
+/* ADF4377 REG0033 Bit Definition */
+#define ADF4377_R033_RSV1 0x18
+
+/* ADF4377 REG0034 Bit Definition */
+#define ADF4377_R034_RSV1 0x08
+
+/* ADF4377 REG003A Bit Definition */
+#define ADF4377_R03A_RSV1 0x5D
+
+/* ADF4377 REG003B Bit Definition */
+#define ADF4377_R03B_RSV1 0x2B
+
+/* ADF4377 REG003D Map */
+#define ADF4377_O_VCO_BAND_MSK BIT(3)
+#define ADF4377_O_VCO_CORE_MSK BIT(2)
+#define ADF4377_O_VCO_BIAS_MSK BIT(1)
+
+/* ADF4377 REG003D Bit Definition */
+#define ADF4377_O_VCO_BAND_VCO_CALIB 0x0
+#define ADF4377_O_VCO_BAND_M_VCO 0x1
+
+#define ADF4377_O_VCO_CORE_VCO_CALIB 0x0
+#define ADF4377_O_VCO_CORE_M_VCO 0x1
+
+#define ADF4377_O_VCO_BIAS_VCO_CALIB 0x0
+#define ADF4377_O_VCO_BIAS_M_VCO 0x1
+
+/* ADF4377 REG0042 Map */
+#define ADF4377_R042_RSV1 0x05
+
+/* ADF4377 REG0045 Map */
+#define ADF4377_ADC_ST_CNV_MSK BIT(0)
+
+/* ADF4377 REG0045 Bit Definition */
+#define ADF4377_ADC_ST_ADC_DIS 0x0
+#define ADF4377_ADC_ST_ADC_EN 0x1
+
+/* ADF4377 REG0049 Map */
+#define ADF4377_EN_CLK2_MSK BIT(7)
+#define ADF4377_EN_CLK1_MSK BIT(6)
+#define ADF4377_REF_OK_MSK BIT(3)
+#define ADF4377_ADC_BUSY_MSK BIT(2)
+#define ADF4377_FSM_BUSY_MSK BIT(1)
+#define ADF4377_LOCKED_MSK BIT(0)
+
+/* ADF4377 REG004B Map */
+#define ADF4377_VCO_CORE_MSK GENMASK(1, 0)
+
+/* ADF4377 REG004C Map */
+#define ADF4377_CHIP_TEMP_LSB_MSK GENMASK(7, 0)
+
+/* ADF4377 REG004D Map */
+#define ADF4377_CHIP_TEMP_MSB_MSK BIT(0)
+
+/* ADF4377 REG004F Map */
+#define ADF4377_VCO_BAND_MSK GENMASK(7, 0)
+
+/* ADF4377 REG0051 Map */
+#define ADF4377_VCO_BIAS_MSK GENMASK(3, 0)
+
+/* ADF4377 REG0054 Map */
+#define ADF4377_CHIP_VERSION_MSK GENMASK(7, 0)
+
+/* Specifications */
+#define ADF4377_SPI_READ_CMD BIT(7)
+#define ADF4377_MAX_VCO_FREQ (12800ULL * HZ_PER_MHZ)
+#define ADF4377_MIN_VCO_FREQ (6400ULL * HZ_PER_MHZ)
+#define ADF4377_MAX_REFIN_FREQ (1000 * HZ_PER_MHZ)
+#define ADF4377_MIN_REFIN_FREQ (10 * HZ_PER_MHZ)
+#define ADF4377_MAX_FREQ_PFD (500 * HZ_PER_MHZ)
+#define ADF4377_MIN_FREQ_PFD (3 * HZ_PER_MHZ)
+#define ADF4377_MAX_CLKPN_FREQ ADF4377_MAX_VCO_FREQ
+#define ADF4377_MIN_CLKPN_FREQ (ADF4377_MIN_VCO_FREQ / 8)
+#define ADF4377_FREQ_PFD_80MHZ (80 * HZ_PER_MHZ)
+#define ADF4377_FREQ_PFD_125MHZ (125 * HZ_PER_MHZ)
+#define ADF4377_FREQ_PFD_160MHZ (160 * HZ_PER_MHZ)
+#define ADF4377_FREQ_PFD_250MHZ (250 * HZ_PER_MHZ)
+#define ADF4377_FREQ_PFD_320MHZ (320 * HZ_PER_MHZ)
+
+enum adf4377_dev_type {
+ ADF4377,
+ ADF4378,
+};
+
+enum {
+ ADF4377_FREQ,
+};
+
+enum muxout_select_modes {
+ ADF4377_MUXOUT_HIGH_Z = 0x0,
+ ADF4377_MUXOUT_LKDET = 0x1,
+ ADF4377_MUXOUT_LOW = 0x2,
+ ADF4377_MUXOUT_DIV_RCLK_2 = 0x4,
+ ADF4377_MUXOUT_DIV_NCLK_2 = 0x5,
+ ADF4377_MUXOUT_HIGH = 0x8,
+};
+
+struct adf4377_state {
+ struct spi_device *spi;
+ enum adf4377_dev_type type;
+ struct regmap *regmap;
+ struct clk *clkin;
+ /* Protect against concurrent accesses to the device and data content */
+ struct mutex lock;
+ struct notifier_block nb;
+ /* Reference Divider */
+ unsigned int ref_div_factor;
+ /* PFD Frequency */
+ unsigned int f_pfd;
+ /* Input Reference Clock */
+ unsigned int clkin_freq;
+ /* CLKOUT Divider */
+ u8 clkout_div_sel;
+ /* Feedback Divider (N) */
+ u16 n_int;
+ u16 synth_lock_timeout;
+ u16 vco_alc_timeout;
+ u16 adc_clk_div;
+ u16 vco_band_div;
+ u8 dclk_div1;
+ u8 dclk_div2;
+ u8 dclk_mode;
+ unsigned int f_div_rclk;
+ struct gpio_desc *gpio_ce;
+ struct gpio_desc *gpio_enclk1;
+ struct gpio_desc *gpio_enclk2;
+ u8 buf[2] ____cacheline_aligned;
+};
+
+static const char * const adf4377_muxout_modes[] = {
+ [ADF4377_MUXOUT_HIGH_Z] = "high_z",
+ [ADF4377_MUXOUT_LKDET] = "lock_detect",
+ [ADF4377_MUXOUT_LOW] = "muxout_low",
+ [ADF4377_MUXOUT_DIV_RCLK_2] = "f_div_rclk_2",
+ [ADF4377_MUXOUT_DIV_NCLK_2] = "f_div_nclk_2",
+ [ADF4377_MUXOUT_HIGH] = "muxout_high",
+};
+
+static const struct regmap_config adf4377_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .read_flag_mask = BIT(7),
+ .max_register = 0x54,
+};
+
+static int adf4377_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg,
+ unsigned int write_val,
+ unsigned int *read_val)
+{
+ struct adf4377_state *st = iio_priv(indio_dev);
+
+ if (read_val)
+ return regmap_read(st->regmap, reg, read_val);
+
+ return regmap_write(st->regmap, reg, write_val);
+}
+
+static const struct iio_info adf4377_info = {
+ .debugfs_reg_access = &adf4377_reg_access,
+};
+
+static int adf4377_soft_reset(struct adf4377_state *st)
+{
+ unsigned int read_val;
+ int ret;
+
+ ret = regmap_update_bits(st->regmap, 0x0, ADF4377_SOFT_RESET_MSK |
+ ADF4377_SOFT_RESET_R_MSK,
+ FIELD_PREP(ADF4377_SOFT_RESET_MSK, 1) |
+ FIELD_PREP(ADF4377_SOFT_RESET_R_MSK, 1));
+ if (ret)
+ return ret;
+
+ return regmap_read_poll_timeout(st->regmap, 0x0, read_val,
+ !(read_val & (ADF4377_SOFT_RESET_R_MSK |
+ ADF4377_SOFT_RESET_R_MSK)), 200, 200 * 100);
+}
+
+static int adf4377_set_default(struct adf4377_state *st)
+{
+ int ret;
+
+ /* Set default registers bits */
+ ret = regmap_write(st->regmap, 0x42, ADF4377_R042_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x3B, ADF4377_R03B_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x3A, ADF4377_R03A_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x34, ADF4377_R034_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x33, ADF4377_R033_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x32, ADF4377_R032_RSV1_MSK,
+ FIELD_PREP(ADF4377_R032_RSV1_MSK, 0x9));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x31, ADF4377_R031_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x2C, ADF4377_R02C_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x25, ADF4377_R025_RSV1_MSK,
+ FIELD_PREP(ADF4377_R025_RSV1_MSK, 0x16));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x23, ADF4377_R023_RSV1_MSK,
+ FIELD_PREP(ADF4377_R023_RSV1_MSK, 0x18));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x22, ADF4377_R022_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x21, ADF4377_R021_RSV1);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x1f, ADF4377_R01F_RSV1_MSK,
+ FIELD_PREP(ADF4377_R01F_RSV1_MSK, 0x7));
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(st->regmap, 0x1c, ADF4377_R01C_RSV1_MSK,
+ FIELD_PREP(ADF4377_R01C_RSV1_MSK, 0x1));
+}
+
+int adf4377_get_freq(struct adf4377_state *st, u64 *freq)
+{
+ unsigned int ref_div_factor, n_int;
+ u64 clkin_freq;
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = regmap_read(st->regmap, 0x12, &ref_div_factor);
+ if (ret)
+ goto exit;
+
+ ret = regmap_bulk_read(st->regmap, 0x10, st->buf, sizeof(st->buf));
+ if (ret)
+ goto exit;
+
+ clkin_freq = clk_get_rate(st->clkin);
+ ref_div_factor = FIELD_GET(ADF4377_R_DIV_MSK, ref_div_factor);
+ n_int = FIELD_GET(ADF4377_N_INT_LSB_MSK, st->buf[0]) |
+ (FIELD_GET(ADF4377_N_INT_MSB_MSK, st->buf[1]) << 8);
+
+ *freq = div_u64(clkin_freq, ref_div_factor) * n_int;
+exit:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+int adf4377_set_freq(struct adf4377_state *st, u64 freq)
+{
+ unsigned int read_val;
+ u64 f_vco;
+ int ret;
+
+ ret = regmap_update_bits(st->regmap, 0x1C, ADF4377_EN_DNCLK_MSK | ADF4377_EN_DRCLK_MSK,
+ FIELD_PREP(ADF4377_EN_DNCLK_MSK, ADF4377_EN_DNCLK_ON) |
+ FIELD_PREP(ADF4377_EN_DRCLK_MSK, ADF4377_EN_DRCLK_ON));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x11, ADF4377_EN_AUTOCAL_MSK | ADF4377_DCLK_DIV2_MSK,
+ FIELD_PREP(ADF4377_EN_AUTOCAL_MSK, ADF4377_VCO_CALIB_EN) |
+ FIELD_PREP(ADF4377_DCLK_DIV2_MSK, st->dclk_div2));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x2E, ADF4377_EN_ADC_CNV_MSK | ADF4377_EN_ADC_MSK |
+ ADF4377_ADC_A_CONV_MSK,
+ FIELD_PREP(ADF4377_EN_ADC_CNV_MSK, ADF4377_EN_ADC_CNV_EN) |
+ FIELD_PREP(ADF4377_EN_ADC_MSK, ADF4377_EN_ADC_EN) |
+ FIELD_PREP(ADF4377_ADC_A_CONV_MSK, ADF4377_ADC_A_CONV_VCO_CALIB));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x20, ADF4377_EN_ADC_CLK_MSK,
+ FIELD_PREP(ADF4377_EN_ADC_CLK_MSK, ADF4377_EN_ADC_CLK_EN));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x2F, ADF4377_DCLK_DIV1_MSK,
+ FIELD_PREP(ADF4377_DCLK_DIV1_MSK, st->dclk_div1));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x24, ADF4377_DCLK_MODE_MSK,
+ FIELD_PREP(ADF4377_DCLK_MODE_MSK, st->dclk_mode));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x27,
+ FIELD_PREP(ADF4377_SYNTH_LOCK_TO_LSB_MSK, st->synth_lock_timeout));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x28, ADF4377_SYNTH_LOCK_TO_MSB_MSK,
+ FIELD_PREP(ADF4377_SYNTH_LOCK_TO_MSB_MSK,
+ st->synth_lock_timeout >> 8));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x29,
+ FIELD_PREP(ADF4377_VCO_ALC_TO_LSB_MSK, st->vco_alc_timeout));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x2A, ADF4377_VCO_ALC_TO_MSB_MSK,
+ FIELD_PREP(ADF4377_VCO_ALC_TO_MSB_MSK, st->vco_alc_timeout >> 8));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x26,
+ FIELD_PREP(ADF4377_VCO_BAND_DIV_MSK, st->vco_band_div));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x2D,
+ FIELD_PREP(ADF4377_ADC_CLK_DIV_MSK, st->adc_clk_div));
+ if (ret)
+ return ret;
+
+ st->clkout_div_sel = 0;
+
+ if (freq > ADF4377_MAX_CLKPN_FREQ || freq < ADF4377_MIN_CLKPN_FREQ) {
+ ret = -EINVAL;
+ return ret;
+ }
+
+ f_vco = freq;
+
+ while (f_vco < ADF4377_MIN_VCO_FREQ) {
+ f_vco <<= 1;
+ st->clkout_div_sel++;
+ }
+
+ st->n_int = div_u64(freq, st->f_pfd);
+
+ ret = regmap_update_bits(st->regmap, 0x11, ADF4377_EN_RDBLR_MSK | ADF4377_N_INT_MSB_MSK,
+ FIELD_PREP(ADF4377_EN_RDBLR_MSK, ADF4377_REF_DBLR_DIS) |
+ FIELD_PREP(ADF4377_N_INT_MSB_MSK, st->n_int >> 8));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x12, ADF4377_R_DIV_MSK | ADF4377_CLKOUT_DIV_MSK,
+ FIELD_PREP(ADF4377_CLKOUT_DIV_MSK, st->clkout_div_sel) |
+ FIELD_PREP(ADF4377_R_DIV_MSK, st->ref_div_factor));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(st->regmap, 0x10,
+ FIELD_PREP(ADF4377_N_INT_LSB_MSK, st->n_int));
+ if (ret)
+ return ret;
+
+ ret = regmap_read_poll_timeout(st->regmap, 0x49, read_val,
+ !(read_val & (ADF4377_FSM_BUSY_MSK)), 200, 200 * 100);
+ if (ret)
+ return ret;
+
+ /* Disable EN_DNCLK, EN_DRCLK */
+ ret = regmap_update_bits(st->regmap, 0x1C, ADF4377_EN_DNCLK_MSK | ADF4377_EN_DRCLK_MSK,
+ FIELD_PREP(ADF4377_EN_DNCLK_MSK, ADF4377_EN_DNCLK_OFF) |
+ FIELD_PREP(ADF4377_EN_DRCLK_MSK, ADF4377_EN_DRCLK_OFF));
+ if (ret)
+ return ret;
+
+ /* Disable EN_ADC_CLK */
+ ret = regmap_update_bits(st->regmap, 0x20, ADF4377_EN_ADC_CLK_MSK,
+ FIELD_PREP(ADF4377_EN_ADC_CLK_MSK, ADF4377_EN_ADC_CLK_DIS));
+ if (ret)
+ return ret;
+
+ /* Set output Amplitude */
+ return regmap_update_bits(st->regmap, 0x19, ADF4377_CLKOUT2_OP_MSK | ADF4377_CLKOUT1_OP_MSK,
+ FIELD_PREP(ADF4377_CLKOUT1_OP_MSK, ADF4377_CLKOUT_420MV) |
+ FIELD_PREP(ADF4377_CLKOUT2_OP_MSK, ADF4377_CLKOUT_420MV));
+}
+
+static void adf4377_gpio_init(struct adf4377_state *st)
+{
+ if (st->gpio_ce) {
+ gpiod_set_value(st->gpio_ce, 1);
+
+ /* Delay for SPI register bits to settle to their power-on reset state */
+ usleep_range(200, 250);
+ }
+
+ if (st->gpio_enclk1)
+ gpiod_set_value(st->gpio_enclk1, 1);
+
+ if (st->gpio_enclk2 && st->type == ADF4377)
+ gpiod_set_value(st->gpio_enclk2, 1);
+}
+
+static int adf4377_init(struct adf4377_state *st)
+{
+ int ret;
+
+ /* GPIO Inititalization */
+ adf4377_gpio_init(st);
+
+ /* Software reset */
+ ret = adf4377_soft_reset(st);
+ if (ret)
+ return ret;
+
+ /* Set Default Registers */
+ ret = adf4377_set_default(st);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x15, ADF4377_CP_I_MSK,
+ FIELD_PREP(ADF4377_CP_I_MSK, ADF4377_CP_10MA1));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, 0x00,
+ ADF4377_SDO_ACTIVE_MSK | ADF4377_SDO_ACTIVE_R_MSK,
+ FIELD_PREP(ADF4377_SDO_ACTIVE_MSK, ADF4377_SDO_ACTIVE_SPI_4W) |
+ FIELD_PREP(ADF4377_SDO_ACTIVE_R_MSK, ADF4377_SDO_ACTIVE_SPI_4W));
+ if (ret)
+ return ret;
+
+ st->clkin_freq = clk_get_rate(st->clkin);
+
+ /* Power Up */
+ ret = regmap_write(st->regmap, 0x1a,
+ FIELD_PREP(ADF4377_PD_ALL_MSK, ADF4377_PD_ALL_N_OP) |
+ FIELD_PREP(ADF4377_PD_RDIV_MSK, ADF4377_PD_RDIV_N_OP) |
+ FIELD_PREP(ADF4377_PD_NDIV_MSK, ADF4377_PD_NDIV_N_OP) |
+ FIELD_PREP(ADF4377_PD_VCO_MSK, ADF4377_PD_VCO_N_OP) |
+ FIELD_PREP(ADF4377_PD_LD_MSK, ADF4377_PD_LD_N_OP) |
+ FIELD_PREP(ADF4377_PD_PFDCP_MSK, ADF4377_PD_PFDCP_N_OP) |
+ FIELD_PREP(ADF4377_PD_CLKOUT1_MSK, ADF4377_PD_CLKOUT1_N_OP) |
+ FIELD_PREP(ADF4377_PD_CLKOUT2_MSK, ADF4377_PD_CLKOUT2_N_OP));
+ if (ret)
+ return ret;
+
+ /* Compute PFD */
+ st->ref_div_factor = 0;
+ do {
+ st->ref_div_factor++;
+ st->f_pfd = st->clkin_freq / st->ref_div_factor;
+ } while (st->f_pfd > ADF4377_MAX_FREQ_PFD);
+
+ if (st->f_pfd > ADF4377_MAX_FREQ_PFD || st->f_pfd < ADF4377_MIN_FREQ_PFD)
+ return -EINVAL;
+
+ st->f_div_rclk = st->f_pfd;
+
+ if (st->f_pfd <= ADF4377_FREQ_PFD_80MHZ) {
+ st->dclk_div1 = ADF4377_DCLK_DIV1_1;
+ st->dclk_div2 = ADF4377_DCLK_DIV2_1;
+ st->dclk_mode = ADF4377_DCLK_MODE_DIS;
+ } else if (st->f_pfd <= ADF4377_FREQ_PFD_125MHZ) {
+ st->dclk_div1 = ADF4377_DCLK_DIV1_1;
+ st->dclk_div2 = ADF4377_DCLK_DIV2_1;
+ st->dclk_mode = ADF4377_DCLK_MODE_EN;
+ } else if (st->f_pfd <= ADF4377_FREQ_PFD_160MHZ) {
+ st->dclk_div1 = ADF4377_DCLK_DIV1_2;
+ st->dclk_div2 = ADF4377_DCLK_DIV2_1;
+ st->dclk_mode = ADF4377_DCLK_MODE_DIS;
+ st->f_div_rclk /= 2;
+ } else if (st->f_pfd <= ADF4377_FREQ_PFD_250MHZ) {
+ st->dclk_div1 = ADF4377_DCLK_DIV1_2;
+ st->dclk_div2 = ADF4377_DCLK_DIV2_1;
+ st->dclk_mode = ADF4377_DCLK_MODE_EN;
+ st->f_div_rclk /= 2;
+ } else if (st->f_pfd <= ADF4377_FREQ_PFD_320MHZ) {
+ st->dclk_div1 = ADF4377_DCLK_DIV1_2;
+ st->dclk_div2 = ADF4377_DCLK_DIV2_2;
+ st->dclk_mode = ADF4377_DCLK_MODE_DIS;
+ st->f_div_rclk /= 4;
+ } else {
+ st->dclk_div1 = ADF4377_DCLK_DIV1_2;
+ st->dclk_div2 = ADF4377_DCLK_DIV2_2;
+ st->dclk_mode = ADF4377_DCLK_MODE_EN;
+ st->f_div_rclk /= 4;
+ }
+
+ st->synth_lock_timeout = DIV_ROUND_UP(st->f_div_rclk, 50000);
+ st->vco_alc_timeout = DIV_ROUND_UP(st->f_div_rclk, 20000);
+ st->vco_band_div = DIV_ROUND_UP(st->f_div_rclk, 150000 * 16 * (1 << st->dclk_mode));
+ st->adc_clk_div = DIV_ROUND_UP((st->f_div_rclk / 400000 - 2), 4);
+
+ return 0;
+}
+
+static ssize_t adf4377_read(struct iio_dev *indio_dev, uintptr_t private,
+ const struct iio_chan_spec *chan, char *buf)
+{
+ struct adf4377_state *st = iio_priv(indio_dev);
+ u64 val = 0;
+ int ret;
+
+ switch ((u32)private) {
+ case ADF4377_FREQ:
+ ret = adf4377_get_freq(st, &val);
+ break;
+ default:
+ ret = -EINVAL;
+ val = 0;
+ break;
+ }
+
+ return ret ?: sysfs_emit(buf, "%llu\n", val);
+}
+
+static ssize_t adf4377_write(struct iio_dev *indio_dev, uintptr_t private,
+ const struct iio_chan_spec *chan, const char *buf,
+ size_t len)
+{
+ struct adf4377_state *st = iio_priv(indio_dev);
+ unsigned long long freq;
+ int ret;
+
+ mutex_lock(&st->lock);
+ switch ((u32)private) {
+ case ADF4377_FREQ:
+ ret = kstrtoull(buf, 10, &freq);
+ if (ret)
+ break;
+
+ ret = adf4377_set_freq(st, freq);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ mutex_unlock(&st->lock);
+
+ return ret ? ret : len;
+}
+
+static int adf4377_set_muxout_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ unsigned int mode)
+{
+ struct adf4377_state *st = iio_priv(indio_dev);
+
+ return regmap_update_bits(st->regmap, 0x1D,
+ ADF4377_MUXOUT_MSK,
+ FIELD_PREP(ADF4377_MUXOUT_MSK, mode));
+}
+
+static int adf4377_get_muxout_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct adf4377_state *st = iio_priv(indio_dev);
+ unsigned int mode;
+ int ret;
+
+ ret = regmap_read(st->regmap, 0x1D, &mode);
+
+ return ret ? : FIELD_GET(ADF4377_MUXOUT_MSK, mode);
+}
+
+static const struct iio_enum adf4377_muxout_enum = {
+ .items = adf4377_muxout_modes,
+ .num_items = ARRAY_SIZE(adf4377_muxout_modes),
+ .get = adf4377_get_muxout_mode,
+ .set = adf4377_set_muxout_mode,
+};
+
+#define _ADF4377_EXT_INFO(_name, _shared, _ident) { \
+ .name = _name, \
+ .read = adf4377_read, \
+ .write = adf4377_write, \
+ .private = _ident, \
+ .shared = _shared, \
+ }
+
+static const struct iio_chan_spec_ext_info adf4377_ext_info[] = {
+ /*
+ * Usually we use IIO_CHAN_INFO_FREQUENCY, but there are
+ * values > 2^32 in order to support the entire frequency range
+ * in Hz.
+ */
+ _ADF4377_EXT_INFO("frequency", IIO_SHARED_BY_ALL, ADF4377_FREQ),
+ IIO_ENUM("muxout_select", IIO_SHARED_BY_ALL, &adf4377_muxout_enum),
+ IIO_ENUM_AVAILABLE("muxout_select", IIO_SHARED_BY_ALL, &adf4377_muxout_enum),
+ { },
+};
+
+static const struct iio_chan_spec adf4377_channels[] = {
+ {
+ .type = IIO_ALTVOLTAGE,
+ .indexed = 1,
+ .output = 1,
+ .channel = 0,
+ .ext_info = adf4377_ext_info,
+ },
+};
+
+static int adf4377_properties_parse(struct adf4377_state *st)
+{
+ struct spi_device *spi = st->spi;
+
+ st->clkin = devm_clk_get(&spi->dev, "ref_in");
+ if (IS_ERR(st->clkin))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
+ "failed to get the reference input clock\n");
+
+ st->gpio_ce = devm_gpiod_get_optional(&st->spi->dev, "ce-en",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(st->gpio_ce))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_ce),
+ "failed to get the CE GPIO\n");
+
+ st->gpio_enclk1 = devm_gpiod_get_optional(&st->spi->dev, "enclk1",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(st->gpio_enclk1))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk1),
+ "failed to get the CE GPIO\n");
+
+ if (st->type == ADF4377) {
+ st->gpio_enclk2 = devm_gpiod_get_optional(&st->spi->dev, "enclk2",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(st->gpio_enclk2))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk2),
+ "failed to get the CE GPIO\n");
+ }
+
+ return 0;
+}
+
+static int adf4377_freq_change(struct notifier_block *nb, unsigned long action, void *data)
+{
+ struct adf4377_state *st = container_of(nb, struct adf4377_state, nb);
+ int ret;
+
+ if (action == POST_RATE_CHANGE) {
+ mutex_lock(&st->lock);
+ ret = notifier_from_errno(adf4377_init(st));
+ mutex_unlock(&st->lock);
+ return ret;
+ }
+
+ return NOTIFY_OK;
+}
+
+static void adf4377_clk_disable(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+static int adf4377_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct regmap *regmap;
+ struct adf4377_state *st;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ regmap = devm_regmap_init_spi(spi, &adf4377_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ st = iio_priv(indio_dev);
+
+ indio_dev->info = &adf4377_info;
+ indio_dev->name = "adf4377";
+ indio_dev->channels = adf4377_channels;
+ indio_dev->num_channels = ARRAY_SIZE(adf4377_channels);
+
+ st->regmap = regmap;
+ st->spi = spi;
+ st->type = spi_get_device_id(spi)->driver_data;
+ mutex_init(&st->lock);
+
+ ret = adf4377_properties_parse(st);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(st->clkin);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(&spi->dev, adf4377_clk_disable, st->clkin);
+ if (ret)
+ return ret;
+
+ st->nb.notifier_call = adf4377_freq_change;
+ ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
+ if (ret)
+ return ret;
+
+ ret = adf4377_init(st);
+ if (ret) {
+ dev_err(&spi->dev, "adf4377 init failed\n");
+ return ret;
+ }
+
+ return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static const struct spi_device_id adf4377_id[] = {
+ { "adf4377", ADF4377 },
+ { "adf4378", ADF4378 },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, adf4377_id);
+
+static const struct of_device_id adf4377_of_match[] = {
+ { .compatible = "adi,adf4377" },
+ { .compatible = "adi,adf4378" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, adf4377_of_match);
+
+static struct spi_driver adf4377_driver = {
+ .driver = {
+ .name = "adf4377",
+ .of_match_table = adf4377_of_match,
+ },
+ .probe = adf4377_probe,
+ .id_table = adf4377_id,
+};
+module_spi_driver(adf4377_driver);
+
+MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Analog Devices ADF4377");
+MODULE_LICENSE("GPL");
--
2.38.1