linux-kernel - Re: [PATCH v5] i2c: i801: Register optional lis3lv02d I2C device on Dell machines

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Message-ID: <20190607161640.0d90e1b9@endymion>
Date:   Fri, 7 Jun 2019 16:16:40 +0200
From:   Jean Delvare <jdelvare@...e.de>
To:     Pali Rohár <pali.rohar@...il.com>
Cc:     Wolfram Sang <wsa@...-dreams.de>,
        Michał Kępień <kernel@...pniu.pl>,
        Steven Honeyman <stevenhoneyman@...il.com>,
        Valdis.Kletnieks@...edu,
        Jochen Eisinger <jochen@...guin-breeder.org>,
        Gabriele Mazzotta <gabriele.mzt@...il.com>,
        Andy Lutomirski <luto@...nel.org>, Mario_Limonciello@...l.com,
        Alex Hung <alex.hung@...onical.com>,
        Takashi Iwai <tiwai@...e.de>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v5] i2c: i801: Register optional lis3lv02d I2C device on
 Dell machines

On Thu,  6 Jun 2019 20:18:45 +0200, Pali Rohár wrote:
> Dell platform team told us that some (DMI whitelisted) Dell Latitude
> machines have ST microelectronics accelerometer at I2C address 0x29.
> 
> Presence of that ST microelectronics accelerometer is verified by existence
> of SMO88xx ACPI device which represent that accelerometer. Unfortunately
> ACPI device does not specify I2C address.
> 
> This patch registers lis3lv02d device for selected Dell Latitude machines
> at I2C address 0x29 after detection. And for Dell Vostro V131 machine at
> I2C address 0x1d which was manually detected.
> 
> Finally commit a7ae81952cda ("i2c: i801: Allow ACPI SystemIO OpRegion to
> conflict with PCI BAR") allowed to use i2c-i801 driver on Dell machines so
> lis3lv02d correctly initialize accelerometer.
> 
> Tested on Dell Latitude E6440.
> 
> Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> 
> ---
> Changes since v4:
>  * Remove usage of redundant acpi_bus_get_status_handle()
>  * Update comment about acpi_get_devices()
> (...)

Looks all good now.

Reviewed-by: Jean Delvare <jdelvare@...e.de>

Thanks!
-- 
Jean Delvare
SUSE L3 Support