linux-kernel - [PATCH v1 11/15] iio: adc: ad7768-1: Add reg_write

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <67649c43050d161621bc0494638bfa71fed82ea8.1736201898.git.Jonathan.Santos@analog.com>
Date: Tue, 7 Jan 2025 12:26:28 -0300
From: Jonathan Santos <Jonathan.Santos@...log.com>
To: <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC: Sergiu Cuciurean <sergiu.cuciurean@...log.com>, <lars@...afoo.de>,
        <Michael.Hennerich@...log.com>, <jic23@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <marcelo.schmitt1@...il.com>
Subject: [PATCH v1 11/15] iio: adc: ad7768-1: Add reg_write_masked function

From: Sergiu Cuciurean <sergiu.cuciurean@...log.com>

This commit adds the ad7768_spi_reg_write_masked() which is a helper
function for writing specific bits inside a register, without interfering
with the other bit values.

Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@...log.com>
---
 drivers/iio/adc/ad7768-1.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/iio/adc/ad7768-1.c b/drivers/iio/adc/ad7768-1.c
index 574d735f2c3a..675af9ea856d 100644
--- a/drivers/iio/adc/ad7768-1.c
+++ b/drivers/iio/adc/ad7768-1.c
@@ -242,6 +242,21 @@ static int ad7768_spi_reg_write(struct ad7768_state *st,
 	return spi_write(st->spi, st->data.d8, 2);
 }
 
+static int ad7768_spi_reg_write_masked(struct ad7768_state *st,
+				       unsigned int addr,
+				       unsigned int mask,
+				       unsigned int val)
+{
+	unsigned int reg_val;
+	int ret;
+
+	ret = ad7768_spi_reg_read(st, addr, &reg_val, 1);
+	if (ret < 0)
+		return ret;
+
+	return ad7768_spi_reg_write(st, addr, (reg_val & ~mask) | val);
+}
+
 static int ad7768_set_mode(struct ad7768_state *st,
 			   enum ad7768_conv_mode mode)
 {
-- 
2.34.1