linux-kernel - Re: [PATCH v3 4/6] iio: st_sensors: Add ACPI support for lsm303d to the LSM9DS0 IMU driver

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Message-ID: <20230507145022.1465b89d@jic23-huawei>
Date:   Sun, 7 May 2023 14:50:22 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Marius Hoch <mail@...iushoch.de>
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Denis Ciocca <denis.ciocca@...com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        Marius Hoch <marius@...iushoch.de>
Subject: Re: [PATCH v3 4/6] iio: st_sensors: Add ACPI support for lsm303d to
 the LSM9DS0 IMU driver

On Tue, 2 May 2023 16:51:42 +0200
Marius Hoch <mail@...iushoch.de> wrote:

> Hi,
> 
> On 16/04/2023 01:11, Marius Hoch wrote:
> <snip>
> > diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
> > index 997b5ff792be..55f3738193af 100644
> > --- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
> > +++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
> > @@ -37,6 +37,12 @@ static const struct spi_device_id st_lsm9ds0_id_table[] = {
> >   };
> >   MODULE_DEVICE_TABLE(spi, st_lsm9ds0_id_table);
> >   
> > +static const struct acpi_device_id st_lsm9ds0_acpi_match[] = {
> > +	{"ACCL0001", (kernel_ulong_t)LSM303D_IMU_DEV_NAME},
> > +	{ },
> > +};
> > +MODULE_DEVICE_TABLE(acpi, st_lsm9ds0_acpi_match);
> > +
> >   static const struct regmap_config st_lsm9ds0_regmap_config = {
> >   	.reg_bits	= 8,
> >   	.val_bits	= 8,
> > @@ -72,6 +78,7 @@ static struct spi_driver st_lsm9ds0_driver = {
> >   	.driver = {
> >   		.name = "st-lsm9ds0-spi",
> >   		.of_match_table = st_lsm9ds0_of_match,
> > +		.acpi_match_table = st_lsm9ds0_acpi_match,
> >   	},
> >   	.probe = st_lsm9ds0_spi_probe,
> >   	.id_table = st_lsm9ds0_id_table,  
> I just realized that these changes (the SPI ones, not the I2C ones) are 
> entirely superfluous, and I'm not sure why I added this in the first 
> place. In the Lenovo Yoga Tablet 2 series (which seem to be the only 
> devices exposing this as "ACCL0001"), the device is accessible via I2C. 
> Just to make sure, I re-tested the patch chain without this change.
> 
> @Jonathan: Shall I upload an entirely new patch set (v4), do this in a 
> separate new clean up commit, or do you want to just drop these changes 
> to drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c? I'm fine with any of 
> these options.

I'll drop it and push out a new version of the togreg tree.

Thanks for pointing this out.

Jonathan

> 
> Cheers,
> Marius