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