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[82.209.154.112]) by smtp.gmail.com with ESMTPSA id w27-20020a19491b000000b0047a0bf9540asm3060405lfa.213.2022.06.23.10.07.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Jun 2022 10:07:14 -0700 (PDT) From: Marcus Folkesson To: Marcus Folkesson , Kent Gustavsson , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 08/10] iio: adc: mcp3911: add support for phase Date: Thu, 23 Jun 2022 19:08:42 +0200 Message-Id: <20220623170844.2189814-8-marcus.folkesson@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220623170844.2189814-1-marcus.folkesson@gmail.com> References: <20220623170844.2189814-1-marcus.folkesson@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org The MCP3911 incorporates a phase delay generator, which ensures that the two ADCs are converting the inputs with a fixed delay between them. Expose it to userspace. Signed-off-by: Marcus Folkesson --- drivers/iio/adc/mcp3911.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c index 9e365947d285..aefc5eac874c 100644 --- a/drivers/iio/adc/mcp3911.c +++ b/drivers/iio/adc/mcp3911.c @@ -155,6 +155,17 @@ static int mcp3911_read_raw(struct iio_dev *indio_dev, ret = IIO_VAL_INT; break; + + case IIO_CHAN_INFO_PHASE: + ret = mcp3911_read(adc, + MCP3911_REG_PHASE, val, 2); + if (ret) + goto out; + + *val = sign_extend32(*val, 12); + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_OVERSAMPLING_RATIO: ret = mcp3911_read(adc, MCP3911_REG_CONFIG, val, 2); @@ -225,6 +236,16 @@ static int mcp3911_write_raw(struct iio_dev *indio_dev, MCP3911_STATUSCOM_EN_OFFCAL, 2); break; + case IIO_CHAN_INFO_PHASE: + if (val2 != 0 || val > 0xfff) { + ret = -EINVAL; + goto out; + } + + /* Write phase */ + ret = mcp3911_write(adc, MCP3911_REG_PHASE, val, + 2); + break; case IIO_CHAN_INFO_OVERSAMPLING_RATIO: switch (val) { case 4096: @@ -273,7 +294,9 @@ static int mcp3911_write_raw(struct iio_dev *indio_dev, .channel = idx, \ .scan_index = idx, \ .scan_index = idx, \ - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ + .info_mask_shared_by_type = \ + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO)| \ + BIT(IIO_CHAN_INFO_PHASE), \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ BIT(IIO_CHAN_INFO_OFFSET) | \ BIT(IIO_CHAN_INFO_SCALE), \ -- 2.36.1