linux-kernel - Re: [PATCH 0/5] iio: accel: Add bma023 support to bma180

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Message-ID: <BN6PR04MB0660BD7ABF64EC0C19A65A03A3A50@BN6PR04MB0660.namprd04.prod.outlook.com>
Date:   Wed, 6 May 2020 20:49:17 -0700
From:   Jonathan Bakker <xc-racer2@...e.ca>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linux Input <linux-input@...r.kernel.org>
Subject: Re: [PATCH 0/5] iio: accel: Add bma023 support to bma180

Hi Linus,

On 2020-05-06 5:47 a.m., Linus Walleij wrote:
> On Sun, May 3, 2020 at 7:22 PM Jonathan Bakker <xc-racer2@...e.ca> wrote:
> 
>> This patchset adds support for the bma023 three axis accelerometer
>> to the bma180 IIO driver.  The bma023 is found on several ~2010
>> phones, including the first-gen Galaxy S series.
>>
>> The bma023 differs from later chips (bma180, bma25x) in that it
>> has no low power but still working mode and no temperature
>> channel.
>>
>> The bma023 is already supported by a misc input driver (bma150), so
>> when both are enabled, the iio driver is preferred.  The bma150
>> is very similar to the bma023, but has a temperature channel.
>> Support for the bma150 is not added in this patchset.
> 
> I'd say, if it's not too much trouble please also patch in
> support for BMA150 and SMB380 to the IIO driver so
> we can delete this old Input driver, we have done this
> before and thes "input drivers" are just causing headaches
> and wasting time for the Input maintainer.
> 

Looking at the bma150, it looks the same.  The temperature is implemented
slightly differently than on the bma180+ (unsigned vs signed) but should
be quite easy to add.  I'll add a new patch for it in v2.

> It can be in a separate patch set from this one if you
> don't want to get stuck on this.
> 
> Yours,
> Linus Walleij
> 

Thanks,
Jonathan