linux-kernel - [PATCH v3 01/11] leds: aw200xx: fix write to DIM parameter

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]

Date:   Wed, 1 Nov 2023 17:24:35 +0300
From:   Dmitry Rokosov <ddrokosov@...utedevices.com>
To:     <lee@...nel.org>, <pavel@....cz>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <andy.shevchenko@...il.com>
CC:     <kernel@...rdevices.ru>, <rockosov@...il.com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-leds@...r.kernel.org>,
        Martin Kurbanov <mmkurbanov@...utedevices.com>,
        Dmitry Rokosov <ddrokosov@...utedevices.com>
Subject: [PATCH v3 01/11] leds: aw200xx: fix write to DIM parameter

From: Martin Kurbanov <mmkurbanov@...utedevices.com>

If write only DIM value to the page 4, LED brightness will not be
updated, as both DIM and FADE need to be written to the page 4.
Therefore, write DIM to the page 1.

Fixes: 36a87f371b7a ("leds: Add AW20xx driver")
Signed-off-by: Martin Kurbanov <mmkurbanov@...utedevices.com>
Signed-off-by: Dmitry Rokosov <ddrokosov@...utedevices.com>
---
 drivers/leds/leds-aw200xx.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c
index ef4eda6a09ee..842a22087b16 100644
--- a/drivers/leds/leds-aw200xx.c
+++ b/drivers/leds/leds-aw200xx.c
@@ -74,6 +74,10 @@
 #define AW200XX_LED2REG(x, columns) \
 	((x) + (((x) / (columns)) * (AW200XX_DSIZE_COLUMNS_MAX - (columns))))
 
+/* DIM current configuration register on page 1 */
+#define AW200XX_REG_DIM_PAGE1(x, columns) \
+	AW200XX_REG(AW200XX_PAGE1, AW200XX_LED2REG(x, columns))
+
 /*
  * DIM current configuration register (page 4).
  * The even address for current DIM configuration.
@@ -153,7 +157,8 @@ static ssize_t dim_store(struct device *dev, struct device_attribute *devattr,
 
 	if (dim >= 0) {
 		ret = regmap_write(chip->regmap,
-				   AW200XX_REG_DIM(led->num, columns), dim);
+				   AW200XX_REG_DIM_PAGE1(led->num, columns),
+				   dim);
 		if (ret)
 			goto out_unlock;
 	}
-- 
2.36.0