linux-kernel - [PATCH v2 10/19] staging: iio: resolver: ad2s1210: add debugfs reg access

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Date:   Thu, 21 Sep 2023 09:43:51 -0500
From:   David Lechner <dlechner@...libre.com>
To:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-staging@...ts.linux.dev
Cc:     linux-kernel@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Axel Haslam <ahaslam@...libre.com>,
        Philip Molloy <pmolloy@...libre.com>,
        David Lechner <dlechner@...libre.com>
Subject: [PATCH v2 10/19] staging: iio: resolver: ad2s1210: add debugfs reg access

This add an implementation of debugfs_reg_access for the AD2S1210
driver.

Signed-off-by: David Lechner <dlechner@...libre.com>
---
 drivers/staging/iio/resolver/ad2s1210.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index 3c81ee61b897..b99928394e3f 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -606,9 +606,29 @@ static int ad2s1210_initial(struct ad2s1210_state *st)
 	return ret;
 }
 
+static int ad2s1210_debugfs_reg_access(struct iio_dev *indio_dev,
+				       unsigned int reg, unsigned int writeval,
+				       unsigned int *readval)
+{
+	struct ad2s1210_state *st = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&st->lock);
+
+	if (readval)
+		ret = regmap_read(st->regmap, reg, readval);
+	else
+		ret = regmap_write(st->regmap, reg, writeval);
+
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
 static const struct iio_info ad2s1210_info = {
 	.read_raw = ad2s1210_read_raw,
 	.attrs = &ad2s1210_attribute_group,
+	.debugfs_reg_access = &ad2s1210_debugfs_reg_access,
 };
 
 static int ad2s1210_setup_clocks(struct ad2s1210_state *st)
-- 
2.34.1