From: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
This patch adds support for Analog Devices ADF4350/ADF4351
Wideband Synthesizers (35MHz to 4.4GHz).
Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
---
.../staging/iio/Documentation/sysfs-bus-iio-pll | 46 ++
drivers/staging/iio/Kconfig | 1 +
drivers/staging/iio/Makefile | 1 +
drivers/staging/iio/pll/Kconfig | 16 +
drivers/staging/iio/pll/Makefile | 5 +
drivers/staging/iio/pll/adf4350.c | 485 ++++++++++++++++++++
drivers/staging/iio/pll/adf4350.h | 121 +++++
7 files changed, 675 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/iio/Documentation/sysfs-bus-iio-pll
create mode 100644 drivers/staging/iio/pll/Kconfig
create mode 100644 drivers/staging/iio/pll/Makefile
create mode 100644 drivers/staging/iio/pll/adf4350.c
create mode 100644 drivers/staging/iio/pll/adf4350.h
diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-pll b/drivers/staging/iio/Documentation/sysfs-bus-iio-pll
new file mode 100644
index 0000000..2aa2497
--- /dev/null
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-pll
@@ -0,0 +1,46 @@
+
+What: /sys/bus/iio/devices/iio:deviceX/out_pllY_freq
+KernelVersion: 3.2.0
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Stores PLL Y frequency in Hz. Reading returns the
+ actual frequency in Hz. When setting a new frequency, the PLL
+ requires some time to lock. If available, the user can read
+ out_pllY_locked in order to check whether the PLL has locked
+ or not.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_pllY_freq_resolution
+KernelVersion: 3.2.0
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Stores PLL Y frequency resolution/channel spacing in Hz.
+ The value given directly influences the MODULUS used by
+ the fractional-N PLL. It is assumed that the algorithm
+ that is used to compute the various dividers, is able to
+ generate proper values for multiples of channel spacing.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_pllY_refin_freq
+KernelVersion: 3.2.0
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Sets PLL Y REFin frequency in Hz. In some clock chained
+ applications, the reference frequency used by the PLL may
+ change during runtime. This attribute allows the user to
+ adjust the reference frequency accordingly.
+ The value written has no effect until out_pllY_freq is updated.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_pllY_powerdown
+KernelVersion: 3.2.0
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ If available, this attribute allows the user to power down
+ the PLL and it's RFOut buffers. This is in particular useful
+ during REFin changes.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_pllY_locked
+KernelVersion: 3.2.0
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ If available, this attribute allows the user to determine
+ whether the PLL has locked by reading '1' or not '0'.
+
diff --git a/drivers/staging/iio/Kconfig b/drivers/staging/iio/Kconfig
index 90162aa..d85e5ac 100644
--- a/drivers/staging/iio/Kconfig
+++ b/drivers/staging/iio/Kconfig
@@ -68,6 +68,7 @@ source "drivers/staging/iio/imu/Kconfig"
source "drivers/staging/iio/light/Kconfig"
source "drivers/staging/iio/magnetometer/Kconfig"
source "drivers/staging/iio/meter/Kconfig"
+source "drivers/staging/iio/pll/Kconfig"
source "drivers/staging/iio/resolver/Kconfig"
source "drivers/staging/iio/trigger/Kconfig"
diff --git a/drivers/staging/iio/Makefile b/drivers/staging/iio/Makefile
index 1340aea..433b235 100644
--- a/drivers/staging/iio/Makefile
+++ b/drivers/staging/iio/Makefile
@@ -29,5 +29,6 @@ obj-y += imu/
obj-y += light/
obj-y += magnetometer/
obj-y += meter/
+obj-y += pll/
obj-y += resolver/
obj-y += trigger/
diff --git a/drivers/staging/iio/pll/Kconfig b/drivers/staging/iio/pll/Kconfig
new file mode 100644
index 0000000..ebbe926
--- /dev/null
+++ b/drivers/staging/iio/pll/Kconfig
@@ -0,0 +1,16 @@
+#
+# Phase-Locked Loop (PLL) frequency synthesizers
+#
+menu "Phase-Locked Loop (PLL) frequency synthesizers"
+
+config ADF4350
+ tristate "Analog Devices ADF4350/ADF4351 Wideband Synthesizers"
+ depends on SPI
+ help
+ Say yes here to build support for Analog Devices ADF4350/ADF4351
+ Wideband Synthesizers. The driver provides direct access via sysfs.
+
+ To compile this driver as a module, choose M here: the
+ module will be called adf4350.
+
+endmenu
diff --git a/drivers/staging/iio/pll/Makefile b/drivers/staging/iio/pll/Makefile
new file mode 100644
index 0000000..6990bd9
--- /dev/null
+++ b/drivers/staging/iio/pll/Makefile
@@ -0,0 +1,5 @@
+#
+# Phase-Locked Loop (PLL) frequency synthesizers
+#
+
+obj-$(CONFIG_ADF4350) += adf4350.o
diff --git a/drivers/staging/iio/pll/adf4350.c b/drivers/staging/iio/pll/adf4350.c
new file mode 100644
index 0000000..027a91e
--- /dev/null
+++ b/drivers/staging/iio/pll/adf4350.c
@@ -0,0 +1,485 @@
+/*
+ * ADF4350/ADF4351 SPI Wideband Synthesizer driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/gcd.h>
+#include <linux/gpio.h>
+#include <asm/div64.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+
+#include "adf4350.h"
+
+enum {
+ ADF4350_SET_FREQ,
+ ADF4350_SET_FREQ_REFIN,
+ ADF4350_SET_FREQ_RESOLUTION,
+ ADF4350_PLL_LOCKED,
+ ADF4350_PLL_PWRDOWN,
+};
+
+struct adf4350_state {
+ struct spi_device *spi;
+ struct regulator *reg;
+ struct adf4350_platform_data *pdata;
+ unsigned long clkin;
+ unsigned long chspc;
+ unsigned long fpfd;
+ unsigned long min_out_freq;
+ unsigned r0_fract;
+ unsigned r0_int;
+ unsigned r1_mod;
+ unsigned r4_rf_div_sel;
+ unsigned long regs[6];
+ unsigned long regs_hw[6];
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+ __be32 val ____cacheline_aligned;
+};
+
+static struct adf4350_platform_data default_pdata = {
+ .clkin = 10000000,
+ .channel_spacing = 10000,
+ .r2_user_settings = ADF4350_REG2_PD_POLARITY_POS,
+ ADF4350_REG2_CHARGE_PUMP_CURR_uA(2500),
+ .r3_user_settings = ADF4350_REG3_12BIT_CLKDIV_MODE(0),
+ .r4_user_settings = ADF4350_REG4_OUTPUT_PWR(0) |
+ ADF4350_REG4_MUTE_TILL_LOCK_EN,
+ .gpio_lock_detect = -1,
+};
+
+static int adf4350_sync_config(struct adf4350_state *st)
+{
+ int ret, i, doublebuf = 0;
+
+ for (i = ADF4350_REG5; i >= ADF4350_REG0; i--) {
+ if ((st->regs_hw[i] != st->regs[i]) ||
+ ((i == ADF4350_REG0) && doublebuf)) {
+
+ switch (i) {
+ case ADF4350_REG1:
+ case ADF4350_REG4:
+ doublebuf = 1;
+ break;
+ case ADF4350_REG0:
+ doublebuf = 0;
+ break;
+ }
+
+ st->val = cpu_to_be32(st->regs[i] | i);
+ ret = spi_write(st->spi, &st->val, 4);
+ if (ret < 0)
+ return ret;
+ st->regs_hw[i] = st->regs[i];
+ dev_dbg(&st->spi->dev, "[%d] 0x%X\n",
+ i, (u32)st->regs[i] | i);
+ }
+ }
+ return 0;
+}
+
+static int adf4350_tune_r_cnt(struct adf4350_state *st, unsigned short r_cnt)
+{
+ struct adf4350_platform_data *pdata = st->pdata;
+
+ do {
+ r_cnt++;
+ st->fpfd = (st->clkin * (pdata->ref_doubler_en ? 2 : 1)) /
+ (r_cnt * (pdata->ref_div2_en ? 2 : 1));
+ } while (st->fpfd > ADF4350_MAX_FREQ_PFD);
+
+ return r_cnt;
+}
+
+static int adf4350_set_freq(struct adf4350_state *st, unsigned long long freq)
+{
+ struct adf4350_platform_data *pdata = st->pdata;
+ u64 tmp;
+ u32 div_gcd, prescaler;
+ u16 mdiv, r_cnt = 0;
+ u8 band_sel_div;
+
+ if (freq > ADF4350_MAX_OUT_FREQ || freq < st->min_out_freq)
+ return -EINVAL;
+
+ if (freq > ADF4350_MAX_FREQ_45_PRESC) {
+ prescaler = ADF4350_REG1_PRESCALER;
+ mdiv = 75;
+ } else {
+ prescaler = 0;
+ mdiv = 23;
+ }
+
+ st->r4_rf_div_sel = 0;
+
+ while (freq < ADF4350_MIN_VCO_FREQ) {
+ freq <<= 1;
+ st->r4_rf_div_sel++;
+ }
+
+ /* Allow a predefined reference division factor
+ * if not set, compute our own
+ */
+ if (pdata->ref_div_factor)
+ r_cnt = pdata->ref_div_factor - 1;
+
+ do {
+ r_cnt = adf4350_tune_r_cnt(st, r_cnt);
+
+ st->r1_mod = st->fpfd / st->chspc;
+ while (st->r1_mod > ADF4350_MAX_MODULUS) {
+ r_cnt = adf4350_tune_r_cnt(st, r_cnt);
+ st->r1_mod = st->fpfd / st->chspc;
+ }
+
+ tmp = freq * (u64)st->r1_mod + (st->fpfd > 1);
+ do_div(tmp, st->fpfd); /* Div round closest (n + d/2)/d */
+ st->r0_fract = do_div(tmp, st->r1_mod);
+ st->r0_int = tmp;
+ } while (mdiv > st->r0_int);
+
+ band_sel_div = DIV_ROUND_UP(st->fpfd, ADF4350_MAX_BANDSEL_CLK);
+
+ if (st->r0_fract && st->r1_mod) {
+ div_gcd = gcd(st->r1_mod, st->r0_fract);
+ st->r1_mod /= div_gcd;
+ st->r0_fract /= div_gcd;
+ } else {
+ st->r0_fract = 0;
+ st->r1_mod = 1;
+ }
+
+ dev_dbg(&st->spi->dev, "VCO: %llu Hz, PFD %lu Hz\n"
+ "REF_DIV %d, R0_INT %d, R0_FRACT %d\n"
+ "R1_MOD %d, RF_DIV %d\nPRESCALER %s, BAND_SEL_DIV %d\n",
+ freq, st->fpfd, r_cnt, st->r0_int, st->r0_fract, st->r1_mod,
+ 1 << st->r4_rf_div_sel, prescaler ? "8/9" : "4/5",
+ band_sel_div);
+
+ st->regs[ADF4350_REG0] = ADF4350_REG0_INT(st->r0_int) |
+ ADF4350_REG0_FRACT(st->r0_fract);
+
+ st->regs[ADF4350_REG1] = ADF4350_REG1_PHASE(0) |
+ ADF4350_REG1_MOD(st->r1_mod) |
+ prescaler;
+
+ st->regs[ADF4350_REG3] = pdata->r3_user_settings &
+ (ADF4350_REG3_12BIT_CLKDIV(0xFFF) |
+ ADF4350_REG3_12BIT_CLKDIV_MODE(0x3) |
+ ADF4350_REG3_12BIT_CSR_EN |
+ ADF4351_REG3_CHARGE_CANCELLATION_EN |
+ ADF4351_REG3_ANTI_BACKLASH_3ns_EN |
+ ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH);
+
+ st->regs[ADF4350_REG2] =
+ ADF4350_REG2_10BIT_R_CNT(r_cnt) |
+ ADF4350_REG2_DOUBLE_BUFF_EN |
+ (pdata->ref_doubler_en ? ADF4350_REG2_RMULT2_EN : 0) |
+ (pdata->ref_div2_en ? ADF4350_REG2_RDIV2_EN : 0) |
+ (pdata->r2_user_settings & (ADF4350_REG2_PD_POLARITY_POS |
+ ADF4350_REG2_LDP_6ns | ADF4350_REG2_LDF_INT_N |
+ ADF4350_REG2_CHARGE_PUMP_CURR_uA(5000) |
+ ADF4350_REG2_MUXOUT(0x7) | ADF4350_REG2_NOISE_MODE(0x9)));
+
+ st->regs[ADF4350_REG4] =
+ ADF4350_REG4_FEEDBACK_FUND |
+ ADF4350_REG4_RF_DIV_SEL(st->r4_rf_div_sel) |
+ ADF4350_REG4_8BIT_BAND_SEL_CLKDIV(band_sel_div) |
+ ADF4350_REG4_RF_OUT_EN |
+ (pdata->r4_user_settings &
+ (ADF4350_REG4_OUTPUT_PWR(0x3) |
+ ADF4350_REG4_AUX_OUTPUT_PWR(0x3) |
+ ADF4350_REG4_AUX_OUTPUT_EN |
+ ADF4350_REG4_AUX_OUTPUT_FUND |
+ ADF4350_REG4_MUTE_TILL_LOCK_EN));
+
+ st->regs[ADF4350_REG5] = ADF4350_REG5_LD_PIN_MODE_DIGITAL;
+
+ return adf4350_sync_config(st);
+}
+
+static ssize_t adf4350_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct adf4350_state *st = iio_priv(indio_dev);
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ unsigned long long readin;
+ int ret;
+
+ ret = kstrtoull(buf, 10, &readin);
+ if (ret)
+ return ret;
+
+ mutex_lock(&indio_dev->mlock);
+ switch ((u32)this_attr->address) {
+ case ADF4350_SET_FREQ:
+ ret = adf4350_set_freq(st, readin);
+ break;
+ case ADF4350_SET_FREQ_REFIN:
+ if (readin > ADF4350_MAX_FREQ_REFIN)
+ ret = -EINVAL;
+ else
+ st->clkin = readin;
+ break;
+ case ADF4350_SET_FREQ_RESOLUTION:
+ if (readin == 0)
+ ret = -EINVAL;
+ else
+ st->chspc = readin;
+ break;
+ case ADF4350_PLL_PWRDOWN:
+ if (readin)
+ st->regs[ADF4350_REG2] |= ADF4350_REG2_POWER_DOWN_EN;
+ else
+ st->regs[ADF4350_REG2] &= ~ADF4350_REG2_POWER_DOWN_EN;
+
+ adf4350_sync_config(st);
+ break;
+ default:
+ ret = -ENODEV;
+ }
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret ? ret : len;
+}
+
+
+static ssize_t adf4350_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct adf4350_state *st = iio_priv(indio_dev);
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ unsigned long long val;
+
+ mutex_lock(&indio_dev->mlock);
+ switch ((u32)this_attr->address) {
+ case ADF4350_SET_FREQ:
+ val = (u64)((st->r0_int * st->r1_mod) + st->r0_fract) *
+ (u64)st->fpfd;
+ do_div(val, st->r1_mod * (1 << st->r4_rf_div_sel));
+ break;
+ case ADF4350_SET_FREQ_REFIN:
+ val = st->clkin;
+ break;
+ case ADF4350_SET_FREQ_RESOLUTION:
+ val = st->chspc;
+ break;
+ case ADF4350_PLL_LOCKED:
+ val = gpio_get_value(st->pdata->gpio_lock_detect);
+ break;
+ case ADF4350_PLL_PWRDOWN:
+ val = !!(st->regs[ADF4350_REG2] & ADF4350_REG2_POWER_DOWN_EN);
+ break;
+ }
+ mutex_unlock(&indio_dev->mlock);
+
+ return sprintf(buf, "%llu\n", val);
+}
+
+static IIO_DEVICE_ATTR(out_pll0_freq, S_IRUGO | S_IWUSR,
+ adf4350_show,
+ adf4350_store,
+ ADF4350_SET_FREQ);
+
+static IIO_DEVICE_ATTR(out_pll0_refin_freq, S_IRUGO | S_IWUSR,
+ adf4350_show,
+ adf4350_store,
+ ADF4350_SET_FREQ_REFIN);
+
+static IIO_DEVICE_ATTR(out_pll0_freq_resolution, S_IRUGO | S_IWUSR,
+ adf4350_show,
+ adf4350_store,
+ ADF4350_SET_FREQ_RESOLUTION);
+
+static IIO_DEVICE_ATTR(out_pll0_locked, S_IRUGO,
+ adf4350_show,
+ NULL,
+ ADF4350_PLL_LOCKED);
+
+static IIO_DEVICE_ATTR(out_pll0_powerdown, S_IRUGO | S_IWUSR,
+ adf4350_show,
+ adf4350_store,
+ ADF4350_PLL_PWRDOWN);
+
+static struct attribute *adf4350_attributes[] = {
+ &iio_dev_attr_out_pll0_freq.dev_attr.attr,
+ &iio_dev_attr_out_pll0_refin_freq.dev_attr.attr,
+ &iio_dev_attr_out_pll0_freq_resolution.dev_attr.attr,
+ &iio_dev_attr_out_pll0_locked.dev_attr.attr,
+ &iio_dev_attr_out_pll0_powerdown.dev_attr.attr,
+ NULL,
+};
+
+static mode_t adf4350_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct adf4350_state *st = iio_priv(indio_dev);
+
+ mode_t mode = attr->mode;
+
+ if ((attr == &iio_dev_attr_out_pll0_locked.dev_attr.attr) &&
+ !gpio_is_valid(st->pdata->gpio_lock_detect))
+ mode = 0;
+
+ return mode;
+}
+
+static const struct attribute_group adf4350_attribute_group = {
+ .attrs = adf4350_attributes,
+ .is_visible = adf4350_attr_is_visible,
+};
+
+static const struct iio_info adf4350_info = {
+ .attrs = &adf4350_attribute_group,
+ .driver_module = THIS_MODULE,
+};
+
+static int __devinit adf4350_probe(struct spi_device *spi)
+{
+ struct adf4350_platform_data *pdata = spi->dev.platform_data;
+ struct iio_dev *indio_dev;
+ struct adf4350_state *st;
+ struct regulator *reg;
+ int ret;
+
+ if (!pdata) {
+ dev_dbg(&spi->dev, "no platform data? using default\n");
+ pdata = &default_pdata;
+ }
+
+ reg = regulator_get(&spi->dev, "vcc");
+ if (!IS_ERR(reg)) {
+ ret = regulator_enable(reg);
+ if (ret)
+ goto error_put_reg;
+ }
+
+ indio_dev = iio_allocate_device(sizeof(*st));
+ if (indio_dev == NULL) {
+ ret = -ENOMEM;
+ goto error_disable_reg;
+ }
+
+ spi_set_drvdata(spi, indio_dev);
+ st = iio_priv(indio_dev);
+ st->reg = reg;
+ st->spi = spi;
+ st->pdata = pdata;
+
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->info = &adf4350_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ st->chspc = pdata->channel_spacing;
+ st->clkin = pdata->clkin;
+
+ st->min_out_freq = spi_get_device_id(spi)->driver_data == 4351 ?
+ ADF4351_MIN_OUT_FREQ : ADF4350_MIN_OUT_FREQ;
+
+ memset(st->regs_hw, 0xFF, sizeof(st->regs_hw));
+
+ if (gpio_is_valid(pdata->gpio_lock_detect)) {
+ ret = gpio_request(pdata->gpio_lock_detect, indio_dev->name);
+ if (ret) {
+ dev_err(&spi->dev, "fail to request lock detect GPIO-%d",
+ pdata->gpio_lock_detect);
+ goto error_free_device;
+ }
+ gpio_direction_input(pdata->gpio_lock_detect);
+ }
+
+ if (pdata->power_up_frequency) {
+ ret = adf4350_set_freq(st, pdata->power_up_frequency);
+ if (ret)
+ goto error_free_device;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_free_device;
+
+ return 0;
+
+error_free_device:
+ iio_free_device(indio_dev);
+error_disable_reg:
+ if (!IS_ERR(reg))
+ regulator_disable(reg);
+error_put_reg:
+ if (!IS_ERR(reg))
+ regulator_put(reg);
+
+ return ret;
+}
+
+static int __devexit adf4350_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct adf4350_state *st = iio_priv(indio_dev);
+ struct regulator *reg = st->reg;
+
+ st->regs[ADF4350_REG2] |= ADF4350_REG2_POWER_DOWN_EN;
+ adf4350_sync_config(st);
+
+ iio_device_unregister(indio_dev);
+ if (!IS_ERR(reg)) {
+ regulator_disable(reg);
+ regulator_put(reg);
+ }
+ return 0;
+}
+
+static const struct spi_device_id adf4350_id[] = {
+ {"adf4350", 4350},
+ {"adf4351", 4351},
+ {}
+};
+
+static struct spi_driver adf4350_driver = {
+ .driver = {
+ .name = "adf4350",
+ .owner = THIS_MODULE,
+ },
+ .probe = adf4350_probe,
+ .remove = __devexit_p(adf4350_remove),
+ .id_table = adf4350_id,
+};
+
+static int __init adf4350_init(void)
+{
+ return spi_register_driver(&adf4350_driver);
+}
+module_init(adf4350_init);
+
+static void __exit adf4350_exit(void)
+{
+ spi_unregister_driver(&adf4350_driver);
+}
+module_exit(adf4350_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@xxxxxxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Analog Devices ADF4350/ADF4351 PLL");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/pll/adf4350.h b/drivers/staging/iio/pll/adf4350.h
new file mode 100644
index 0000000..fd2b6f0
--- /dev/null
+++ b/drivers/staging/iio/pll/adf4350.h
@@ -0,0 +1,121 @@
+/*
+ * ADF4350/ADF4351 SPI PLL driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef IIO_PLL_ADF4350_H_
+#define IIO_PLL_ADF4350_H_
+
+/* Registers */
+#define ADF4350_REG0 0
+#define ADF4350_REG1 1
+#define ADF4350_REG2 2
+#define ADF4350_REG3 3
+#define ADF4350_REG4 4
+#define ADF4350_REG5 5
+
+/* REG0 Bit Definitions */
+#define ADF4350_REG0_FRACT(x) (((x) & 0xFFF) << 3)
+#define ADF4350_REG0_INT(x) (((x) & 0xFFFF) << 15)
+
+/* REG1 Bit Definitions */
+#define ADF4350_REG1_MOD(x) (((x) & 0xFFF) << 3)
+#define ADF4350_REG1_PHASE(x) (((x) & 0xFFF) << 15)
+#define ADF4350_REG1_PRESCALER (1 << 27)
+
+/* REG2 Bit Definitions */
+#define ADF4350_REG2_COUNTER_RESET_EN (1 << 3)
+#define ADF4350_REG2_CP_THREESTATE_EN (1 << 4)
+#define ADF4350_REG2_POWER_DOWN_EN (1 << 5)
+#define ADF4350_REG2_PD_POLARITY_POS (1 << 6)
+#define ADF4350_REG2_LDP_6ns (1 << 7)
+#define ADF4350_REG2_LDP_10ns (0 << 7)
+#define ADF4350_REG2_LDF_FRACT_N (0 << 8)
+#define ADF4350_REG2_LDF_INT_N (1 << 8)
+#define ADF4350_REG2_CHARGE_PUMP_CURR_uA(x) (((((x)-312) / 312) & 0xF) << 9)
+#define ADF4350_REG2_DOUBLE_BUFF_EN (1 << 13)
+#define ADF4350_REG2_10BIT_R_CNT(x) ((x) << 14)
+#define ADF4350_REG2_RDIV2_EN (1 << 24)
+#define ADF4350_REG2_RMULT2_EN (1 << 25)
+#define ADF4350_REG2_MUXOUT(x) ((x) << 26)
+#define ADF4350_REG2_NOISE_MODE(x) ((x) << 29)
+
+/* REG3 Bit Definitions */
+#define ADF4350_REG3_12BIT_CLKDIV(x) ((x) << 3)
+#define ADF4350_REG3_12BIT_CLKDIV_MODE(x) ((x) << 16)
+#define ADF4350_REG3_12BIT_CSR_EN (1 << 18)
+#define ADF4351_REG3_CHARGE_CANCELLATION_EN (1 << 21)
+#define ADF4351_REG3_ANTI_BACKLASH_3ns_EN (1 << 22)
+#define ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH (1 << 23)
+
+/* REG4 Bit Definitions */
+#define ADF4350_REG4_OUTPUT_PWR(x) ((x) << 3)
+#define ADF4350_REG4_RF_OUT_EN (1 << 5)
+#define ADF4350_REG4_AUX_OUTPUT_PWR(x) ((x) << 6)
+#define ADF4350_REG4_AUX_OUTPUT_EN (1 << 8)
+#define ADF4350_REG4_AUX_OUTPUT_FUND (1 << 9)
+#define ADF4350_REG4_AUX_OUTPUT_DIV (0 << 9)
+#define ADF4350_REG4_MUTE_TILL_LOCK_EN (1 << 10)
+#define ADF4350_REG4_VCO_PWRDOWN_EN (1 << 11)
+#define ADF4350_REG4_8BIT_BAND_SEL_CLKDIV(x) ((x) << 12)
+#define ADF4350_REG4_RF_DIV_SEL(x) ((x) << 20)
+#define ADF4350_REG4_FEEDBACK_DIVIDED (0 << 23)
+#define ADF4350_REG4_FEEDBACK_FUND (1 << 23)
+
+/* REG5 Bit Definitions */
+#define ADF4350_REG5_LD_PIN_MODE_LOW (0 << 22)
+#define ADF4350_REG5_LD_PIN_MODE_DIGITAL (1 << 22)
+#define ADF4350_REG5_LD_PIN_MODE_HIGH (3 << 22)
+
+/* Specifications */
+#define ADF4350_MAX_OUT_FREQ 4400000000ULL /* Hz */
+#define ADF4350_MIN_OUT_FREQ 137500000 /* Hz */
+#define ADF4351_MIN_OUT_FREQ 34375000 /* Hz */
+#define ADF4350_MIN_VCO_FREQ 2200000000ULL /* Hz */
+#define ADF4350_MAX_FREQ_45_PRESC 3000000000ULL /* Hz */
+#define ADF4350_MAX_FREQ_PFD 32000000 /* Hz */
+#define ADF4350_MAX_BANDSEL_CLK 125000 /* Hz */
+#define ADF4350_MAX_FREQ_REFIN 250000000 /* Hz */
+#define ADF4350_MAX_MODULUS 4095
+
+/*
+ * TODO: struct adf4350_platform_data needs to go into include/linux/iio
+ */
+
+/**
+ * struct adf4350_platform_data - platform specific information
+ * @clkin: REFin frequency in Hz.
+ * @channel_spacing: Channel spacing in Hz (influences MODULUS).
+ * @power_up_frequency: Optional, If set in Hz the PLL tunes to the desired
+ * frequency on probe.
+ * @ref_div_factor: Optional, if set the driver skips dynamic calculation
+ * and uses this default value instead.
+ * @ref_doubler_en: Enables reference doubler.
+ * @ref_div2_en: Enables reference divider.
+ * @r2_user_settings: User defined settings for ADF4350/1 REGISTER_2.
+ * @r3_user_settings: User defined settings for ADF4350/1 REGISTER_3.
+ * @r4_user_settings: User defined settings for ADF4350/1 REGISTER_4.
+ * @gpio_lock_detect: Optional, if set with a valid GPIO number,
+ * a PLL_LOCKED device attribute is created.
+ * If not used - set to -1.
+ */
+
+struct adf4350_platform_data {
+ unsigned long clkin;
+ unsigned long channel_spacing;
+ unsigned long long power_up_frequency;
+
+ unsigned short ref_div_factor; /* 10-bit R counter */
+ bool ref_doubler_en;
+ bool ref_div2_en;
+
+ unsigned r2_user_settings;
+ unsigned r3_user_settings;
+ unsigned r4_user_settings;
+ int gpio_lock_detect;
+};
+
+#endif /* IIO_PLL_ADF4350_H_ */
--
1.7.0.4
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