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From: Paul Menzel <pmenzel@molgen.mpg.de>
To: Jean Delvare <jdelvare@suse.com>,
	Andi Shyti <andi.shyti@kernel.org>
Cc: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>,
	Paul Menzel <pmenzel@molgen.mpg.de>,
	linux-i2c@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] =?UTF-8?q?i2c:=20i801:=20Add=200x29=20as=20I=C2=B2C?= =?UTF-8?q?=20address=20for=20lis3lv02d=20in=20Dell=20XPS=2015=207590?=
Date: Wed, 20 Dec 2023 17:10:02 +0100
Message-ID: <20231220161003.68310-2-pmenzel@molgen.mpg.de>
In-Reply-To: <20231220161003.68310-1-pmenzel@molgen.mpg.de>
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On the Dell XPS 15 7590/0VYV0G, BIOS 1.24.0 09/11/2023, Linux prints the
warning below.

    i801_smbus 0000:00:1f.4: Accelerometer lis3lv02d is present on SMBus but its address is unknown, skipping registration

Following the same suggestions by Wolfram Sang as for the Dell Precision
3540 [1], the accelerometer can be successfully found on I²C bus 2 at
address 0x29.

    $ echo lis3lv02d 0x29 | sudo tee /sys/bus/i2c/devices/i2c-2/new_device
    lis3lv02d 0x29
    $ dmesg | tail -5
    [  549.522876] lis3lv02d_i2c 2-0029: supply Vdd not found, using dummy regulator
    [  549.522904] lis3lv02d_i2c 2-0029: supply Vdd_IO not found, using dummy regulator
    [  549.542486] lis3lv02d: 8 bits 3DC sensor found
    [  549.630022] input: ST LIS3LV02DL Accelerometer as /devices/platform/lis3lv02d/input/input35
    [  549.630586] i2c i2c-2: new_device: Instantiated device lis3lv02d at 0x29

So, the device has that accelerometer. Add the I²C address to the
mapping list, and test it successfully on the device.

[1]: https://lore.kernel.org/linux-i2c/97708c11-ac85-fb62-2c8e-d37739ca826f@molgen.mpg.de/

Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
---
 drivers/i2c/busses/i2c-i801.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index cb9660f84117..3932e8d96a17 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1233,6 +1233,7 @@ static const struct {
 	{ "Precision 3540",     0x29 },
 	{ "Vostro V131",        0x1d },
 	{ "Vostro 5568",        0x29 },
+	{ "XPS 15 7590",        0x29 },
 };
 
 static void register_dell_lis3lv02d_i2c_device(struct i801_priv *priv)
-- 
2.43.0