On Sun, 23 Aug 2020, Dmitry Osipenko wrote:

23.08.2020 21:16, Lubomir Rintel пишет:

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Hello,

...

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+config MFD_ACER_A500_EC
+	tristate "Embedded Controller driver for Acer Iconia Tab A500"
+	depends on (I2C_TEGRA && ARCH_TEGRA_2x_SOC) || COMPILE_TEST

This seems to also depend on I2C and OF. Perhaps I2C_TEGRA and
ARCH_TEGRA_2x_SOC imply that, but it could lead to build failures with
COMPILE_TEST=y. 

Hello, Lubomir! You're right about the I2C because it could be compiled
as a loadable module, good catch! The OF seems should fine as-is.

...

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+static struct a500_ec *a500_ec_scratch;

If this is only used for power_off, please rename it. I've been told to
do so in my driver: https://lore.kernel.org/lkml/20200519104933.GX271301@dell/ (local)

I don't mind to rename the variable, but not sure whether it will be a
worthwhile change since _scratch is also a common naming scheme among
MFD drivers. Please see max77620_scratch for example, which I added
about a year ago.

If something is used once, it does not make it 'common'.

Not sure how this slipped my notice before, but I don't like it.

Ensure any global struct used for power_off only includes items
required for this purpose.  It's unfortunate this API requires a
global variable at all.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
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