aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/devicetree/bindings/iio/frequency/adf4350.txt86
-rw-r--r--drivers/iio/frequency/adf4350.c128
2 files changed, 213 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/iio/frequency/adf4350.txt b/Documentation/devicetree/bindings/iio/frequency/adf4350.txt
new file mode 100644
index 000000000000..f8c181d81d2d
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/frequency/adf4350.txt
@@ -0,0 +1,86 @@
1Analog Devices ADF4350/ADF4351 device driver
2
3Required properties:
4 - compatible: Should be one of
5 * "adi,adf4350": When using the ADF4350 device
6 * "adi,adf4351": When using the ADF4351 device
7 - reg: SPI chip select numbert for the device
8 - spi-max-frequency: Max SPI frequency to use (< 20000000)
9 - clocks: From common clock binding. Clock is phandle to clock for
10 ADF435x Reference Clock (CLKIN).
11
12Optional properties:
13 - gpios: GPIO Lock detect - If set with a valid phandle and GPIO number,
14 pll lock state is tested upon read.
15 - adi,channel-spacing: Channel spacing in Hz (influences MODULUS).
16 - adi,power-up-frequency: If set in Hz the PLL tunes to
17 the desired frequency on probe.
18 - adi,reference-div-factor: If set the driver skips dynamic calculation
19 and uses this default value instead.
20 - adi,reference-doubler-enable: Enables reference doubler.
21 - adi,reference-div2-enable: Enables reference divider.
22 - adi,phase-detector-polarity-positive-enable: Enables positive phase
23 detector polarity. Default = negative.
24 - adi,lock-detect-precision-6ns-enable: Enables 6ns lock detect precision.
25 Default = 10ns.
26 - adi,lock-detect-function-integer-n-enable: Enables lock detect
27 for integer-N mode. Default = factional-N mode.
28 - adi,charge-pump-current: Charge pump current in mA.
29 Default = 2500mA.
30 - adi,muxout-select: On chip multiplexer output selection.
31 Valid values for the multiplexer output are:
32 0: Three-State Output (default)
33 1: DVDD
34 2: DGND
35 3: R-Counter output
36 4: N-Divider output
37 5: Analog lock detect
38 6: Digital lock detect
39 - adi,low-spur-mode-enable: Enables low spur mode.
40 Default = Low noise mode.
41 - adi,cycle-slip-reduction-enable: Enables cycle slip reduction.
42 - adi,charge-cancellation-enable: Enabled charge pump
43 charge cancellation for integer-N modes.
44 - adi,anti-backlash-3ns-enable: Enables 3ns antibacklash pulse width
45 for integer-N modes.
46 - adi,band-select-clock-mode-high-enable: Enables faster band
47 selection logic.
48 - adi,12bit-clk-divider: Clock divider value used when
49 adi,12bit-clkdiv-mode != 0
50 - adi,clk-divider-mode:
51 Valid values for the clkdiv mode are:
52 0: Clock divider off (default)
53 1: Fast lock enable
54 2: Phase resync enable
55 - adi,aux-output-enable: Enables auxiliary RF output.
56 - adi,aux-output-fundamental-enable: Selects fundamental VCO output on
57 the auxiliary RF output. Default = Output of RF dividers.
58 - adi,mute-till-lock-enable: Enables Mute-Till-Lock-Detect function.
59 - adi,output-power: Output power selection.
60 Valid values for the power mode are:
61 0: -4dBm (default)
62 1: -1dBm
63 2: +2dBm
64 3: +5dBm
65 - adi,aux-output-power: Auxiliary output power selection.
66 Valid values for the power mode are:
67 0: -4dBm (default)
68 1: -1dBm
69 2: +2dBm
70 3: +5dBm
71
72
73Example:
74 lo_pll0_rx_adf4351: adf4351-rx-lpc@4 {
75 compatible = "adi,adf4351";
76 reg = <4>;
77 spi-max-frequency = <10000000>;
78 clocks = <&clk0_ad9523 9>;
79 clock-names = "clkin";
80 adi,channel-spacing = <10000>;
81 adi,power-up-frequency = <2400000000>;
82 adi,phase-detector-polarity-positive-enable;
83 adi,charge-pump-current = <2500>;
84 adi,output-power = <3>;
85 adi,mute-till-lock-enable;
86 };
diff --git a/drivers/iio/frequency/adf4350.c b/drivers/iio/frequency/adf4350.c
index f6849c8b6a90..a4157cdb314d 100644
--- a/drivers/iio/frequency/adf4350.c
+++ b/drivers/iio/frequency/adf4350.c
@@ -18,6 +18,8 @@
18#include <linux/gpio.h> 18#include <linux/gpio.h>
19#include <asm/div64.h> 19#include <asm/div64.h>
20#include <linux/clk.h> 20#include <linux/clk.h>
21#include <linux/of.h>
22#include <linux/of_gpio.h>
21 23
22#include <linux/iio/iio.h> 24#include <linux/iio/iio.h>
23#include <linux/iio/sysfs.h> 25#include <linux/iio/sysfs.h>
@@ -375,14 +377,138 @@ static const struct iio_info adf4350_info = {
375 .driver_module = THIS_MODULE, 377 .driver_module = THIS_MODULE,
376}; 378};
377 379
380#ifdef CONFIG_OF
381static struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
382{
383 struct device_node *np = dev->of_node;
384 struct adf4350_platform_data *pdata;
385 unsigned int tmp;
386 int ret;
387
388 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
389 if (!pdata) {
390 dev_err(dev, "could not allocate memory for platform data\n");
391 return NULL;
392 }
393
394 strncpy(&pdata->name[0], np->name, SPI_NAME_SIZE - 1);
395
396 tmp = 10000;
397 of_property_read_u32(np, "adi,channel-spacing", &tmp);
398 pdata->channel_spacing = tmp;
399
400 tmp = 0;
401 of_property_read_u32(np, "adi,power-up-frequency", &tmp);
402 pdata->power_up_frequency = tmp;
403
404 tmp = 0;
405 of_property_read_u32(np, "adi,reference-div-factor", &tmp);
406 pdata->ref_div_factor = tmp;
407
408 ret = of_get_gpio(np, 0);
409 if (ret < 0)
410 pdata->gpio_lock_detect = -1;
411 else
412 pdata->gpio_lock_detect = ret;
413
414 pdata->ref_doubler_en = of_property_read_bool(np,
415 "adi,reference-doubler-enable");
416 pdata->ref_div2_en = of_property_read_bool(np,
417 "adi,reference-div2-enable");
418
419 /* r2_user_settings */
420 pdata->r2_user_settings = of_property_read_bool(np,
421 "adi,phase-detector-polarity-positive-enable") ?
422 ADF4350_REG2_PD_POLARITY_POS : 0;
423 pdata->r2_user_settings |= of_property_read_bool(np,
424 "adi,lock-detect-precision-6ns-enable") ?
425 ADF4350_REG2_LDP_6ns : 0;
426 pdata->r2_user_settings |= of_property_read_bool(np,
427 "adi,lock-detect-function-integer-n-enable") ?
428 ADF4350_REG2_LDF_INT_N : 0;
429
430 tmp = 2500;
431 of_property_read_u32(np, "adi,charge-pump-current", &tmp);
432 pdata->r2_user_settings |= ADF4350_REG2_CHARGE_PUMP_CURR_uA(tmp);
433
434 tmp = 0;
435 of_property_read_u32(np, "adi,muxout-select", &tmp);
436 pdata->r2_user_settings |= ADF4350_REG2_MUXOUT(tmp);
437
438 pdata->r2_user_settings |= of_property_read_bool(np,
439 "adi,low-spur-mode-enable") ?
440 ADF4350_REG2_NOISE_MODE(0x3) : 0;
441
442 /* r3_user_settings */
443
444 pdata->r3_user_settings = of_property_read_bool(np,
445 "adi,cycle-slip-reduction-enable") ?
446 ADF4350_REG3_12BIT_CSR_EN : 0;
447 pdata->r3_user_settings |= of_property_read_bool(np,
448 "adi,charge-cancellation-enable") ?
449 ADF4351_REG3_CHARGE_CANCELLATION_EN : 0;
450
451 pdata->r3_user_settings |= of_property_read_bool(np,
452 "adi,anti-backlash-3ns-enable") ?
453 ADF4351_REG3_ANTI_BACKLASH_3ns_EN : 0;
454 pdata->r3_user_settings |= of_property_read_bool(np,
455 "adi,band-select-clock-mode-high-enable") ?
456 ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH : 0;
457
458 tmp = 0;
459 of_property_read_u32(np, "adi,12bit-clk-divider", &tmp);
460 pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV(tmp);
461
462 tmp = 0;
463 of_property_read_u32(np, "adi,clk-divider-mode", &tmp);
464 pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV_MODE(tmp);
465
466 /* r4_user_settings */
467
468 pdata->r4_user_settings = of_property_read_bool(np,
469 "adi,aux-output-enable") ?
470 ADF4350_REG4_AUX_OUTPUT_EN : 0;
471 pdata->r4_user_settings |= of_property_read_bool(np,
472 "adi,aux-output-fundamental-enable") ?
473 ADF4350_REG4_AUX_OUTPUT_FUND : 0;
474 pdata->r4_user_settings |= of_property_read_bool(np,
475 "adi,mute-till-lock-enable") ?
476 ADF4350_REG4_MUTE_TILL_LOCK_EN : 0;
477
478 tmp = 0;
479 of_property_read_u32(np, "adi,output-power", &tmp);
480 pdata->r4_user_settings |= ADF4350_REG4_OUTPUT_PWR(tmp);
481
482 tmp = 0;
483 of_property_read_u32(np, "adi,aux-output-power", &tmp);
484 pdata->r4_user_settings |= ADF4350_REG4_AUX_OUTPUT_PWR(tmp);
485
486 return pdata;
487}
488#else
489static
490struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
491{
492 return NULL;
493}
494#endif
495
378static int adf4350_probe(struct spi_device *spi) 496static int adf4350_probe(struct spi_device *spi)
379{ 497{
380 struct adf4350_platform_data *pdata = spi->dev.platform_data; 498 struct adf4350_platform_data *pdata;
381 struct iio_dev *indio_dev; 499 struct iio_dev *indio_dev;
382 struct adf4350_state *st; 500 struct adf4350_state *st;
383 struct clk *clk = NULL; 501 struct clk *clk = NULL;
384 int ret; 502 int ret;
385 503
504 if (spi->dev.of_node) {
505 pdata = adf4350_parse_dt(&spi->dev);
506 if (pdata == NULL)
507 return -EINVAL;
508 } else {
509 pdata = spi->dev.platform_data;
510 }
511
386 if (!pdata) { 512 if (!pdata) {
387 dev_warn(&spi->dev, "no platform data? using default\n"); 513 dev_warn(&spi->dev, "no platform data? using default\n");
388 pdata = &default_pdata; 514 pdata = &default_pdata;
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-15 17:40:21 -0400