iio: frequency: adf4350: Add support for dt bindings
Per review feedback from Lars-Peter Clausen <lars@metafoo.de> Changes since V1: Fix return value handling of adf4350_parse_dt() Use of_get_gpio Avoid abbreviations in devicetree properties Fix typo in docs Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Michael Hennerich
Jonathan Cameron
parent
9404fa15f2
commit
e764df6796
|
|
@ -0,0 +1,86 @@
|
|||
Analog Devices ADF4350/ADF4351 device driver
|
||||
|
||||
Required properties:
|
||||
- compatible: Should be one of
|
||||
* "adi,adf4350": When using the ADF4350 device
|
||||
* "adi,adf4351": When using the ADF4351 device
|
||||
- reg: SPI chip select numbert for the device
|
||||
- spi-max-frequency: Max SPI frequency to use (< 20000000)
|
||||
- clocks: From common clock binding. Clock is phandle to clock for
|
||||
ADF435x Reference Clock (CLKIN).
|
||||
|
||||
Optional properties:
|
||||
- gpios: GPIO Lock detect - If set with a valid phandle and GPIO number,
|
||||
pll lock state is tested upon read.
|
||||
- adi,channel-spacing: Channel spacing in Hz (influences MODULUS).
|
||||
- adi,power-up-frequency: If set in Hz the PLL tunes to
|
||||
the desired frequency on probe.
|
||||
- adi,reference-div-factor: If set the driver skips dynamic calculation
|
||||
and uses this default value instead.
|
||||
- adi,reference-doubler-enable: Enables reference doubler.
|
||||
- adi,reference-div2-enable: Enables reference divider.
|
||||
- adi,phase-detector-polarity-positive-enable: Enables positive phase
|
||||
detector polarity. Default = negative.
|
||||
- adi,lock-detect-precision-6ns-enable: Enables 6ns lock detect precision.
|
||||
Default = 10ns.
|
||||
- adi,lock-detect-function-integer-n-enable: Enables lock detect
|
||||
for integer-N mode. Default = factional-N mode.
|
||||
- adi,charge-pump-current: Charge pump current in mA.
|
||||
Default = 2500mA.
|
||||
- adi,muxout-select: On chip multiplexer output selection.
|
||||
Valid values for the multiplexer output are:
|
||||
0: Three-State Output (default)
|
||||
1: DVDD
|
||||
2: DGND
|
||||
3: R-Counter output
|
||||
4: N-Divider output
|
||||
5: Analog lock detect
|
||||
6: Digital lock detect
|
||||
- adi,low-spur-mode-enable: Enables low spur mode.
|
||||
Default = Low noise mode.
|
||||
- adi,cycle-slip-reduction-enable: Enables cycle slip reduction.
|
||||
- adi,charge-cancellation-enable: Enabled charge pump
|
||||
charge cancellation for integer-N modes.
|
||||
- adi,anti-backlash-3ns-enable: Enables 3ns antibacklash pulse width
|
||||
for integer-N modes.
|
||||
- adi,band-select-clock-mode-high-enable: Enables faster band
|
||||
selection logic.
|
||||
- adi,12bit-clk-divider: Clock divider value used when
|
||||
adi,12bit-clkdiv-mode != 0
|
||||
- adi,clk-divider-mode:
|
||||
Valid values for the clkdiv mode are:
|
||||
0: Clock divider off (default)
|
||||
1: Fast lock enable
|
||||
2: Phase resync enable
|
||||
- adi,aux-output-enable: Enables auxiliary RF output.
|
||||
- adi,aux-output-fundamental-enable: Selects fundamental VCO output on
|
||||
the auxiliary RF output. Default = Output of RF dividers.
|
||||
- adi,mute-till-lock-enable: Enables Mute-Till-Lock-Detect function.
|
||||
- adi,output-power: Output power selection.
|
||||
Valid values for the power mode are:
|
||||
0: -4dBm (default)
|
||||
1: -1dBm
|
||||
2: +2dBm
|
||||
3: +5dBm
|
||||
- adi,aux-output-power: Auxiliary output power selection.
|
||||
Valid values for the power mode are:
|
||||
0: -4dBm (default)
|
||||
1: -1dBm
|
||||
2: +2dBm
|
||||
3: +5dBm
|
||||
|
||||
|
||||
Example:
|
||||
lo_pll0_rx_adf4351: adf4351-rx-lpc@4 {
|
||||
compatible = "adi,adf4351";
|
||||
reg = <4>;
|
||||
spi-max-frequency = <10000000>;
|
||||
clocks = <&clk0_ad9523 9>;
|
||||
clock-names = "clkin";
|
||||
adi,channel-spacing = <10000>;
|
||||
adi,power-up-frequency = <2400000000>;
|
||||
adi,phase-detector-polarity-positive-enable;
|
||||
adi,charge-pump-current = <2500>;
|
||||
adi,output-power = <3>;
|
||||
adi,mute-till-lock-enable;
|
||||
};
|
||||
|
|
@ -18,6 +18,8 @@
|
|||
#include <linux/gpio.h>
|
||||
#include <asm/div64.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_gpio.h>
|
||||
|
||||
#include <linux/iio/iio.h>
|
||||
#include <linux/iio/sysfs.h>
|
||||
|
|
@ -375,14 +377,138 @@ static const struct iio_info adf4350_info = {
|
|||
.driver_module = THIS_MODULE,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
|
||||
{
|
||||
struct device_node *np = dev->of_node;
|
||||
struct adf4350_platform_data *pdata;
|
||||
unsigned int tmp;
|
||||
int ret;
|
||||
|
||||
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
|
||||
if (!pdata) {
|
||||
dev_err(dev, "could not allocate memory for platform data\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
strncpy(&pdata->name[0], np->name, SPI_NAME_SIZE - 1);
|
||||
|
||||
tmp = 10000;
|
||||
of_property_read_u32(np, "adi,channel-spacing", &tmp);
|
||||
pdata->channel_spacing = tmp;
|
||||
|
||||
tmp = 0;
|
||||
of_property_read_u32(np, "adi,power-up-frequency", &tmp);
|
||||
pdata->power_up_frequency = tmp;
|
||||
|
||||
tmp = 0;
|
||||
of_property_read_u32(np, "adi,reference-div-factor", &tmp);
|
||||
pdata->ref_div_factor = tmp;
|
||||
|
||||
ret = of_get_gpio(np, 0);
|
||||
if (ret < 0)
|
||||
pdata->gpio_lock_detect = -1;
|
||||
else
|
||||
pdata->gpio_lock_detect = ret;
|
||||
|
||||
pdata->ref_doubler_en = of_property_read_bool(np,
|
||||
"adi,reference-doubler-enable");
|
||||
pdata->ref_div2_en = of_property_read_bool(np,
|
||||
"adi,reference-div2-enable");
|
||||
|
||||
/* r2_user_settings */
|
||||
pdata->r2_user_settings = of_property_read_bool(np,
|
||||
"adi,phase-detector-polarity-positive-enable") ?
|
||||
ADF4350_REG2_PD_POLARITY_POS : 0;
|
||||
pdata->r2_user_settings |= of_property_read_bool(np,
|
||||
"adi,lock-detect-precision-6ns-enable") ?
|
||||
ADF4350_REG2_LDP_6ns : 0;
|
||||
pdata->r2_user_settings |= of_property_read_bool(np,
|
||||
"adi,lock-detect-function-integer-n-enable") ?
|
||||
ADF4350_REG2_LDF_INT_N : 0;
|
||||
|
||||
tmp = 2500;
|
||||
of_property_read_u32(np, "adi,charge-pump-current", &tmp);
|
||||
pdata->r2_user_settings |= ADF4350_REG2_CHARGE_PUMP_CURR_uA(tmp);
|
||||
|
||||
tmp = 0;
|
||||
of_property_read_u32(np, "adi,muxout-select", &tmp);
|
||||
pdata->r2_user_settings |= ADF4350_REG2_MUXOUT(tmp);
|
||||
|
||||
pdata->r2_user_settings |= of_property_read_bool(np,
|
||||
"adi,low-spur-mode-enable") ?
|
||||
ADF4350_REG2_NOISE_MODE(0x3) : 0;
|
||||
|
||||
/* r3_user_settings */
|
||||
|
||||
pdata->r3_user_settings = of_property_read_bool(np,
|
||||
"adi,cycle-slip-reduction-enable") ?
|
||||
ADF4350_REG3_12BIT_CSR_EN : 0;
|
||||
pdata->r3_user_settings |= of_property_read_bool(np,
|
||||
"adi,charge-cancellation-enable") ?
|
||||
ADF4351_REG3_CHARGE_CANCELLATION_EN : 0;
|
||||
|
||||
pdata->r3_user_settings |= of_property_read_bool(np,
|
||||
"adi,anti-backlash-3ns-enable") ?
|
||||
ADF4351_REG3_ANTI_BACKLASH_3ns_EN : 0;
|
||||
pdata->r3_user_settings |= of_property_read_bool(np,
|
||||
"adi,band-select-clock-mode-high-enable") ?
|
||||
ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH : 0;
|
||||
|
||||
tmp = 0;
|
||||
of_property_read_u32(np, "adi,12bit-clk-divider", &tmp);
|
||||
pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV(tmp);
|
||||
|
||||
tmp = 0;
|
||||
of_property_read_u32(np, "adi,clk-divider-mode", &tmp);
|
||||
pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV_MODE(tmp);
|
||||
|
||||
/* r4_user_settings */
|
||||
|
||||
pdata->r4_user_settings = of_property_read_bool(np,
|
||||
"adi,aux-output-enable") ?
|
||||
ADF4350_REG4_AUX_OUTPUT_EN : 0;
|
||||
pdata->r4_user_settings |= of_property_read_bool(np,
|
||||
"adi,aux-output-fundamental-enable") ?
|
||||
ADF4350_REG4_AUX_OUTPUT_FUND : 0;
|
||||
pdata->r4_user_settings |= of_property_read_bool(np,
|
||||
"adi,mute-till-lock-enable") ?
|
||||
ADF4350_REG4_MUTE_TILL_LOCK_EN : 0;
|
||||
|
||||
tmp = 0;
|
||||
of_property_read_u32(np, "adi,output-power", &tmp);
|
||||
pdata->r4_user_settings |= ADF4350_REG4_OUTPUT_PWR(tmp);
|
||||
|
||||
tmp = 0;
|
||||
of_property_read_u32(np, "adi,aux-output-power", &tmp);
|
||||
pdata->r4_user_settings |= ADF4350_REG4_AUX_OUTPUT_PWR(tmp);
|
||||
|
||||
return pdata;
|
||||
}
|
||||
#else
|
||||
static
|
||||
struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int adf4350_probe(struct spi_device *spi)
|
||||
{
|
||||
struct adf4350_platform_data *pdata = spi->dev.platform_data;
|
||||
struct adf4350_platform_data *pdata;
|
||||
struct iio_dev *indio_dev;
|
||||
struct adf4350_state *st;
|
||||
struct clk *clk = NULL;
|
||||
int ret;
|
||||
|
||||
if (spi->dev.of_node) {
|
||||
pdata = adf4350_parse_dt(&spi->dev);
|
||||
if (pdata == NULL)
|
||||
return -EINVAL;
|
||||
} else {
|
||||
pdata = spi->dev.platform_data;
|
||||
}
|
||||
|
||||
if (!pdata) {
|
||||
dev_warn(&spi->dev, "no platform data? using default\n");
|
||||
pdata = &default_pdata;
|
||||
|
|
|
|||
Loading…
Reference in New Issue