linux-kernel - Re: [PATCH v3 2/8] mfd / platform: cros_ec: move lightbar attributes to its own driver.

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Message-ID: <20181203103619.GD26661@dell>
Date:   Mon, 3 Dec 2018 10:36:19 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     gwendal@...omium.org, drinkcat@...omium.org,
        linux-kernel@...r.kernel.org, groeck@...omium.org,
        kernel@...labora.com, bleung@...omium.org,
        Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v3 2/8] mfd / platform: cros_ec: move lightbar attributes
 to its own driver.

On Tue, 27 Nov 2018, Enric Balletbo i Serra wrote:

> The entire way how cros sysfs attibutes are created is broken.
> cros_ec_lightbar should be its own driver and its attributes should be
> associated with a lightbar driver not the mfd driver. In order to retain
> the path, the lightbar attributes are attached to the cros_class.

I'm not exactly clear on what a lightbar is, but shouldn't it live in
the appropriate subsystem.  Like LED for example?

> The patch also adds the sysfs documentation.
> 
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
> 
> Changes in v3:
> - Removed unneded check for ec_dev.
> 
> Changes in v2:
> - Removed the two exported functions to attach/detach to the cros_class.
> - Use dev_warn instead of dev_err when adding the lightbar.
> 
>  ...sfs-class-chromeos-driver-cros-ec-lightbar | 74 +++++++++++++++
>  drivers/mfd/cros_ec_dev.c                     | 24 ++---
>  drivers/mfd/cros_ec_dev.h                     |  6 --
>  drivers/platform/chrome/Kconfig               | 10 ++
>  drivers/platform/chrome/Makefile              |  3 +-
>  drivers/platform/chrome/cros_ec_lightbar.c    | 95 ++++++++++++++-----
>  include/linux/mfd/cros_ec.h                   |  1 -
>  7 files changed, 172 insertions(+), 41 deletions(-)
>  create mode 100644 Documentation/ABI/testing/sysfs-class-chromeos-driver-cros-ec-lightbar

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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