From def914a4c3899b6b3705c8ea67d29972f5652a14 Mon Sep 17 00:00:00 2001 From: Stefan Popa Date: Mon, 24 Jun 2019 18:13:56 +0300 Subject: [PATCH] iio: frequency: adf4371: Add support for output stage mute Another feature of the ADF4371/ADF4372 is that the supply current to the RF8P and RF8N output stage can shut down until the ADF4371 achieves lock as measured by the digital lock detect circuitry. The mute to lock detect bit (MUTE_LD) in REG25 enables this function. Signed-off-by: Stefan Popa Signed-off-by: Jonathan Cameron --- .../devicetree/bindings/iio/frequency/adf4371.yaml | 7 +++++++ drivers/iio/frequency/adf4371.c | 13 +++++++++++++ 2 files changed, 20 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml b/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml index 060900156ae5e..7ec3ec94356b7 100644 --- a/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml +++ b/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml @@ -33,6 +33,13 @@ properties: Must be "clkin" maxItems: 1 + adi,mute-till-lock-en: + type: boolean + description: + If this property is present, then the supply current to RF8P and RF8N + output stage will shut down until the ADF4371/ADF4372 achieves lock as + measured by the digital lock detect circuitry. + required: - compatible - reg diff --git a/drivers/iio/frequency/adf4371.c b/drivers/iio/frequency/adf4371.c index f874219fa8a2e..e48f15cc9ab5c 100644 --- a/drivers/iio/frequency/adf4371.c +++ b/drivers/iio/frequency/adf4371.c @@ -45,6 +45,10 @@ #define ADF4371_RF_DIV_SEL_MSK GENMASK(6, 4) #define ADF4371_RF_DIV_SEL(x) FIELD_PREP(ADF4371_RF_DIV_SEL_MSK, x) +/* ADF4371_REG25 */ +#define ADF4371_MUTE_LD_MSK BIT(7) +#define ADF4371_MUTE_LD(x) FIELD_PREP(ADF4371_MUTE_LD_MSK, x) + /* ADF4371_REG32 */ #define ADF4371_TIMEOUT_MSK GENMASK(1, 0) #define ADF4371_TIMEOUT(x) FIELD_PREP(ADF4371_TIMEOUT_MSK, x) @@ -484,6 +488,15 @@ static int adf4371_setup(struct adf4371_state *st) if (ret < 0) return ret; + /* Mute to Lock Detect */ + if (device_property_read_bool(&st->spi->dev, "adi,mute-till-lock-en")) { + ret = regmap_update_bits(st->regmap, ADF4371_REG(0x25), + ADF4371_MUTE_LD_MSK, + ADF4371_MUTE_LD(1)); + if (ret < 0) + return ret; + } + /* Set address in ascending order, so the bulk_write() will work */ ret = regmap_update_bits(st->regmap, ADF4371_REG(0x0), ADF4371_ADDR_ASC_MSK | ADF4371_ADDR_ASC_R_MSK, -- 2.30.2