Re: [PATCH 4/6] gpio: cbc-presence: Add CBC presence detect as GPIO driver

[Linus Walleij]

On Fri, Oct 7, 2016 at 5:20 PM, Pantelis Antoniou
<pantelis.antoniou@xxxxxxxxxxxx> wrote:

> From: Georgi Vlaev <gvlaev@xxxxxxxxxxx>
>
> This driver exports the CB FPGA presence detect bits from a
> single 32bit CB register as GPIOs.
>
> Signed-off-by: Georgi Vlaev <gvlaev@xxxxxxxxxxx>
> Signed-off-by: Guenter Roeck <groeck@xxxxxxxxxxx>
> [Ported from Juniper kernel]
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>

This needs some more verbose commit message and explanation.

Note: GPIO = General Purpose Input/Output.

This doesn't really sound like general purpose, more like special
purpose.

Consider drivers/input and drivers/connector classes for example.

> +config GPIO_CBC_PRESENCE
> +       tristate "Juniper Networks PTX1K CBC presence detect as GPIO"
> +       depends on MFD_JUNIPER_CBC && OF
> +       default y if JNX_CONNECTOR
> +       help
> +         This driver exports the CH_PRS and OTHER_CH_PRS presence detect
> +         bits of the PTX1K RCB CBC FPGA as GPIOs on the relevant Juniper
> +         platforms. Select if JNX_CONNECTOR is selected.
> +
> +         This driver can also be built as a module.  If so, the module
> +         will be called gpio-cbc-presence.

At least tell us *what* it is detecting the presence of.

Apart from this it has some of the same issues pointed out in the
other drivers, correct these as well.

Yours,
Linus Walleij