[PATCH v5 5/8] iio: frequency: adf41513: handle LE synchronization feature
From: Rodrigo Alencar via B4 Relay <devnull+rodrigo.alencar.analog.com@kernel.org>
Date: 2026-01-23 15:53:58
Also in:
b4-sent, linux-devicetree, linux-iio, lkml
Subsystem:
analog devices inc iio drivers, iio subsystem and drivers, the rest · Maintainers:
Nuno Sá, Michael Hennerich, Jonathan Cameron, Linus Torvalds
From: Rodrigo Alencar <rodrigo.alencar@analog.com> When LE sync is enabled, it is must be set after powering up and must be disabled when powering down. It is recommended when using the PLL as a frequency synthesizer, where reference signal will always be present while the device is being configured. Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com> --- drivers/iio/frequency/adf41513.c | 35 ++++++++++++++++++++++++++++++++--- 1 file changed, 32 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/frequency/adf41513.c b/drivers/iio/frequency/adf41513.c
index 7b5a3a19f1b5..ddad4f4f1938 100644
--- a/drivers/iio/frequency/adf41513.c
+++ b/drivers/iio/frequency/adf41513.c@@ -221,6 +221,7 @@ struct adf41513_data { bool phase_detector_polarity; bool logic_lvl_1v8_en; + bool le_sync_en; }; struct adf41513_pll_settings {
@@ -639,13 +640,27 @@ static int adf41513_set_frequency(struct adf41513_state *st, u64 freq_uhz, u16 s static int adf41513_suspend(struct adf41513_state *st) { st->regs[ADF41513_REG6] |= FIELD_PREP(ADF41513_REG6_POWER_DOWN_MSK, 1); + st->regs[ADF41513_REG12] &= ~ADF41513_REG12_LE_SELECT_MSK; return adf41513_sync_config(st, ADF41513_SYNC_DIFF); } static int adf41513_resume(struct adf41513_state *st) { + int ret; + st->regs[ADF41513_REG6] &= ~ADF41513_REG6_POWER_DOWN_MSK; - return adf41513_sync_config(st, ADF41513_SYNC_DIFF); + ret = adf41513_sync_config(st, ADF41513_SYNC_DIFF); + if (ret) + return ret; + + if (st->data.le_sync_en) { + st->regs[ADF41513_REG12] |= ADF41513_REG12_LE_SELECT_MSK; + ret = adf41513_sync_config(st, ADF41513_SYNC_DIFF); + if (ret) + return ret; + } + + return ret; } static ssize_t adf41513_read_uhz(struct iio_dev *indio_dev,
@@ -939,6 +954,8 @@ static int adf41513_parse_fw(struct adf41513_state *st) "invalid lock detect count: %u\n", tmp); st->data.lock_detect_count = tmp; + /* load enable sync */ + st->data.le_sync_en = device_property_read_bool(dev, "adi,le-sync-enable"); st->data.freq_resolution_uhz = MICROHZ_PER_HZ; return 0;
@@ -946,6 +963,7 @@ static int adf41513_parse_fw(struct adf41513_state *st) static int adf41513_setup(struct adf41513_state *st) { + int ret; u32 tmp; memset(st->regs_hw, 0xFF, sizeof(st->regs_hw));
@@ -979,8 +997,19 @@ static int adf41513_setup(struct adf41513_state *st) st->data.logic_lvl_1v8_en ? 0 : 1); /* perform initialization sequence with power-up frequency */ - return adf41513_set_frequency(st, st->data.power_up_frequency_hz * MICRO, - ADF41513_SYNC_ALL); + ret = adf41513_set_frequency(st, st->data.power_up_frequency_hz * MICRO, + ADF41513_SYNC_ALL); + if (ret) + return ret; + + if (st->data.le_sync_en) { + st->regs[ADF41513_REG12] |= ADF41513_REG12_LE_SELECT_MSK; + ret = adf41513_sync_config(st, ADF41513_SYNC_DIFF); + if (ret) + return ret; + } + + return 0; } static void adf41513_power_down(void *data)
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2.43.0