From 695b7c42d97b2a819b5602f16eed89d08fb45981 Mon Sep 17 00:00:00 2001 From: Antoniu Miclaus Date: Thu, 26 Jun 2025 13:40:24 +0300 Subject: [PATCH] iio: adc: ad4851: add spi 3-wire support MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add support for 3-wire configuration within the driver. By default 4-wire configuration is used. Signed-off-by: Antoniu Miclaus Reviewed-by: Nuno Sá Link: https://patch.msgid.link/20250626104024.8645-2-antoniu.miclaus@analog.com Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ad4851.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/iio/adc/ad4851.c b/drivers/iio/adc/ad4851.c index 31e1e02c0ce33..1ad77f2a45802 100644 --- a/drivers/iio/adc/ad4851.c +++ b/drivers/iio/adc/ad4851.c @@ -444,10 +444,12 @@ static int ad4851_setup(struct ad4851_state *st) if (ret) return ret; - ret = regmap_write(st->regmap, AD4851_REG_INTERFACE_CONFIG_A, - AD4851_SDO_ENABLE); - if (ret) - return ret; + if (!(st->spi->mode & SPI_3WIRE)) { + ret = regmap_write(st->regmap, AD4851_REG_INTERFACE_CONFIG_A, + AD4851_SDO_ENABLE); + if (ret) + return ret; + } ret = regmap_read(st->regmap, AD4851_REG_PRODUCT_ID_L, &product_id); if (ret) -- 2.47.3