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> --- - use `devm_clk_get_enabled()` - return in place for `adf4377_read` and `adf4377_write` - remove adf4378 support since datasheet is not public yet. - print errors inside `adf4377_init` - remove enable/disable related defines and use 0/1 inline with field_prep - remove powerdown bit defines - use `regmap_multi_reg_write` to set the default registers - remove `adf4377_set_default` function - drive gpios to low state by default - remove redundant comments - remove muxout from userspace, move it as devicetree property - remove custom set of the Charge Pump current - remove comma on NULL terminators drivers/iio/frequency/Kconfig | 10 + drivers/iio/frequency/Makefile | 1 + drivers/iio/frequency/adf4377.c | 971 ++++++++++++++++++++++++++++++++ 3 files changed, 982 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..542299f0d47d --- /dev/null +++ b/drivers/iio/frequency/adf4377.c @@ -0,0 +1,971 @@ +// 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/gpio/consumer.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 <asm/unaligned.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 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_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_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 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 + +/* 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 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_LDWIN_PW_NARROW 0x0 +#define ADF4377_LDWIN_PW_WIDE 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_RST_LD_INACTIVE 0x0 +#define ADF4377_RST_LD_ACTIVE 0x1 + +#define ADF4377_R01C_RSV1 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 + +#define ADF4377_R01F_RSV1 0x7 + +/* 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 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 REG0023 Bit Definition */ +#define ADF4377_R023_RSV1 0x18 + +/* ADF4377 REG0024 Map */ +#define ADF4377_DCLK_MODE_MSK BIT(2) + +/* 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_R025_RSV1 0x16 + +/* 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 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 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_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_ADC_CLK_SEL_N_OP 0x0 +#define ADF4377_ADC_CLK_SEL_SPI_CLK 0x1 + +#define ADF4377_R032_RSV1 0x9 + +/* 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 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_FREQ, +}; + +enum muxout_select_mode { + 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; + 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; + enum muxout_select_mode muxout_select; + 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 reg_sequence adf4377_reg_defaults[] = { + {0x42, ADF4377_R042_RSV1}, + {0x3B, ADF4377_R03B_RSV1}, + {0x3A, ADF4377_R03A_RSV1}, + {0x34, ADF4377_R034_RSV1}, + {0x33, ADF4377_R033_RSV1}, + {0x32, ADF4377_R032_RSV1}, + {0x31, ADF4377_R031_RSV1}, + {0x2C, ADF4377_R02C_RSV1}, + {0x25, ADF4377_R025_RSV1}, + {0x23, ADF4377_R023_RSV1}, + {0x22, ADF4377_R022_RSV1}, + {0x21, ADF4377_R021_RSV1}, + {0x1f, ADF4377_R01F_RSV1}, + {0x1c, ADF4377_R01C_RSV1}, +}; + +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_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 | ADF4377_N_INT_MSB_MSK, + get_unaligned_le16(&st->buf)); + + *freq = div_u64(clkin_freq, ref_div_factor) * n_int; +exit: + mutex_unlock(&st->lock); + + return ret; +} + +static int adf4377_set_freq(struct adf4377_state *st, u64 freq) +{ + unsigned int read_val; + u64 f_vco; + int ret; + + mutex_lock(&st->lock); + + ret = regmap_update_bits(st->regmap, 0x1C, ADF4377_EN_DNCLK_MSK | ADF4377_EN_DRCLK_MSK, + FIELD_PREP(ADF4377_EN_DNCLK_MSK, 1) | + FIELD_PREP(ADF4377_EN_DRCLK_MSK, 1)); + if (ret) + goto exit; + + ret = regmap_update_bits(st->regmap, 0x11, ADF4377_EN_AUTOCAL_MSK | ADF4377_DCLK_DIV2_MSK, + FIELD_PREP(ADF4377_EN_AUTOCAL_MSK, 1) | + FIELD_PREP(ADF4377_DCLK_DIV2_MSK, st->dclk_div2)); + if (ret) + goto exit; + + 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, 1) | + FIELD_PREP(ADF4377_EN_ADC_MSK, 1) | + FIELD_PREP(ADF4377_ADC_A_CONV_MSK, ADF4377_ADC_A_CONV_VCO_CALIB)); + if (ret) + goto exit; + + ret = regmap_update_bits(st->regmap, 0x20, ADF4377_EN_ADC_CLK_MSK, + FIELD_PREP(ADF4377_EN_ADC_CLK_MSK, 1)); + if (ret) + goto exit; + + ret = regmap_update_bits(st->regmap, 0x2F, ADF4377_DCLK_DIV1_MSK, + FIELD_PREP(ADF4377_DCLK_DIV1_MSK, st->dclk_div1)); + if (ret) + goto exit; + + ret = regmap_update_bits(st->regmap, 0x24, ADF4377_DCLK_MODE_MSK, + FIELD_PREP(ADF4377_DCLK_MODE_MSK, st->dclk_mode)); + if (ret) + goto exit; + + ret = regmap_write(st->regmap, 0x27, + FIELD_PREP(ADF4377_SYNTH_LOCK_TO_LSB_MSK, st->synth_lock_timeout)); + if (ret) + goto exit; + + 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) + goto exit; + + ret = regmap_write(st->regmap, 0x29, + FIELD_PREP(ADF4377_VCO_ALC_TO_LSB_MSK, st->vco_alc_timeout)); + if (ret) + goto exit; + + 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) + goto exit; + + ret = regmap_write(st->regmap, 0x26, + FIELD_PREP(ADF4377_VCO_BAND_DIV_MSK, st->vco_band_div)); + if (ret) + goto exit; + + ret = regmap_write(st->regmap, 0x2D, + FIELD_PREP(ADF4377_ADC_CLK_DIV_MSK, st->adc_clk_div)); + if (ret) + goto exit; + + st->clkout_div_sel = 0; + + if (freq > ADF4377_MAX_CLKPN_FREQ || freq < ADF4377_MIN_CLKPN_FREQ) { + ret = -EINVAL; + goto exit; + } + + 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, 0) | + FIELD_PREP(ADF4377_N_INT_MSB_MSK, st->n_int >> 8)); + if (ret) + goto exit; + + 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) + goto exit; + + ret = regmap_write(st->regmap, 0x10, + FIELD_PREP(ADF4377_N_INT_LSB_MSK, st->n_int)); + if (ret) + goto exit; + + ret = regmap_read_poll_timeout(st->regmap, 0x49, read_val, + !(read_val & (ADF4377_FSM_BUSY_MSK)), 200, 200 * 100); + if (ret) + goto exit; + + /* 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, 0) | + FIELD_PREP(ADF4377_EN_DRCLK_MSK, 0)); + if (ret) + goto exit; + + /* Disable EN_ADC_CLK */ + ret = regmap_update_bits(st->regmap, 0x20, ADF4377_EN_ADC_CLK_MSK, + FIELD_PREP(ADF4377_EN_ADC_CLK_MSK, 0)); + if (ret) + goto exit; + + /* Set output Amplitude */ + ret = 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)); + +exit: + mutex_unlock(&st->lock); + + return ret; +} + +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 */ + fsleep(200); + } + + if (st->gpio_enclk1) + gpiod_set_value(st->gpio_enclk1, 1); + + if (st->gpio_enclk2) + gpiod_set_value(st->gpio_enclk2, 1); +} + +static int adf4377_init(struct adf4377_state *st) +{ + struct spi_device *spi = st->spi; + int ret; + + adf4377_gpio_init(st); + + ret = adf4377_soft_reset(st); + if (ret) { + dev_err(&spi->dev, "Failed to soft reset.\n"); + return ret; + } + + ret = regmap_multi_reg_write(st->regmap, adf4377_reg_defaults, + ARRAY_SIZE(adf4377_reg_defaults)); + if (ret) { + dev_err(&spi->dev, "Failed to set default registers.\n"); + 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) { + dev_err(&spi->dev, "Failed to set 4-Wire Operation.\n"); + return ret; + } + + st->clkin_freq = clk_get_rate(st->clkin); + + /* Power Up */ + ret = regmap_write(st->regmap, 0x1a, + FIELD_PREP(ADF4377_PD_ALL_MSK, 0) | + FIELD_PREP(ADF4377_PD_RDIV_MSK, 0) | + FIELD_PREP(ADF4377_PD_NDIV_MSK, 0) | + FIELD_PREP(ADF4377_PD_VCO_MSK, 0) | + FIELD_PREP(ADF4377_PD_LD_MSK, 0) | + FIELD_PREP(ADF4377_PD_PFDCP_MSK, 0) | + FIELD_PREP(ADF4377_PD_CLKOUT1_MSK, 0) | + FIELD_PREP(ADF4377_PD_CLKOUT2_MSK, 0)); + if (ret) { + dev_err(&spi->dev, "Failed to set power down registers.\n"); + return ret; + } + + /* Set Mux Output */ + ret = regmap_update_bits(st->regmap, 0x1D, + ADF4377_MUXOUT_MSK, + FIELD_PREP(ADF4377_MUXOUT_MSK, st->muxout_select)); + 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 = 0; + } 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 = 1; + } 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 = 0; + 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 = 1; + 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 = 0; + st->f_div_rclk /= 4; + } else { + st->dclk_div1 = ADF4377_DCLK_DIV1_2; + st->dclk_div2 = ADF4377_DCLK_DIV2_2; + st->dclk_mode = 1; + 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; + + switch ((u32)private) { + case ADF4377_FREQ: + return adf4377_get_freq(st, &val) ?: sysfs_emit(buf, "%llu\n", val); + default: + val = 0; + return -EINVAL; + } +} + +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; + + switch ((u32)private) { + case ADF4377_FREQ: + ret = kstrtoull(buf, 10, &freq); + if (ret) + return ret; + + return adf4377_set_freq(st, freq) ?: len; + default: + return -EINVAL; + } +} + +#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_SEPARATE, ADF4377_FREQ), + { }, +}; + +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; + const char *str; + int ret; + + st->clkin = devm_clk_get_enabled(&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, "chip-enable", + GPIOD_OUT_LOW); + 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, "clk1-enable", + GPIOD_OUT_LOW); + if (IS_ERR(st->gpio_enclk1)) + return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk1), + "failed to get the CE GPIO\n"); + + st->gpio_enclk2 = devm_gpiod_get_optional(&st->spi->dev, "clk2-enable", + GPIOD_OUT_LOW); + if (IS_ERR(st->gpio_enclk2)) + return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk2), + "failed to get the CE GPIO\n"); + + ret = device_property_read_string(&spi->dev, "adi,muxout-select", &str); + if (ret) { + st->muxout_select = ADF4377_MUXOUT_HIGH_Z; + } else { + ret = match_string(adf4377_muxout_modes, ARRAY_SIZE(adf4377_muxout_modes), str); + if (ret < 0) + return ret; + + st->muxout_select = ret; + } + + 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 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; + mutex_init(&st->lock); + + ret = adf4377_properties_parse(st); + 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) + return ret; + + return devm_iio_device_register(&spi->dev, indio_dev); +} + +static const struct spi_device_id adf4377_id[] = { + { "adf4377", 0 }, + {} +}; +MODULE_DEVICE_TABLE(spi, adf4377_id); + +static const struct of_device_id adf4377_of_match[] = { + { .compatible = "adi,adf4377" }, + {} +}; +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
