linux-kernel - Re: [PATCH v6 08/12] gpio: Add GPIO driver for the RK805 PMIC

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Message-ID: <1879271.veJUKjWuAS@phil>
Date:   Fri, 21 Jul 2017 10:12:45 +0200
From:   Heiko Stuebner <heiko@...ech.de>
To:     Jianhong Chen <chenjh@...k-chips.com>
Cc:     linux-rockchip@...ts.infradead.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Tao Huang <huangtao@...k-chips.com>,
        Alexandre Courbot <gnurou@...il.com>, zhangqing@...k-chips.com,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>, tony.xie@...k-chips.com,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        Linux Input <linux-input@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>, w.egorov@...tec.de
Subject: Re: [PATCH v6 08/12] gpio: Add GPIO driver for the RK805 PMIC

Am Freitag, 21. Juli 2017, 10:00:29 CEST schrieb Jianhong Chen:
> 
> 在 2017/6/29 18:29, Heiko Stübner 写道:
> 
> > Hi,
> >
> > Am Mittwoch, 14. Juni 2017, 20:11:06 CEST schrieb Jianhong Chen:
> >> 在 2017/6/9 20:17, Heiko Stuebner 写道:
> >>> Am Freitag, 9. Juni 2017, 13:37:26 CEST schrieb Linus Walleij:
> >>>> Heiko, can you please look at this patch.
> >>>>
> >>>> On Thu, Jun 8, 2017 at 9:30 AM, Jianhong Chen <chenjh@...k-chips.com>
> > wrote:
> >>>>> From: chenjh <chenjh@...k-chips.com>
> >>>> Full name please.
> >>> git config --global user.name "John Doe"
> >>>
> >>> might do the and make this permanent for all your commits :-)
> >>>
> >>>>> RK805 has two configurable GPIOs that can be used for several
> >>>>> purposes. These are output only.
> >>>>>
> >>>>> This driver is generic for other Rockchip PMICs to be added.
> >>>>>
> >>>>> Signed-off-by: chenjh <chenjh@...k-chips.com>
> >>>> Dito.
> >>>>
> >>>> Your commit message says they are output-only, yet you implement
> >>>> .direction_input(). So what is is going to be?
> >>> So far, I've only seen the rk808 and rk818. Both do not have any
> >>> configurable pins.
> >>>
> >>> The rk805 which is a sort of variant of the above, does have the two
> >>> pins defined below, but in the manual I could also only find them as
> >>> output-only and having no other function than being output-pins.
> >>>
> >>> So I don't really know if all the input- or "gpio-mode"- handling is only
> >>> an oversight (copy'n'paste) or if there are yet other rk808 variants
> >>> around
> >>> that can actually be configured as inputs or even non-gpio modes?
> >>>
> >>> I hope Jianhong will be able to answer that.
> >>>
> >>>
> >>> Heiko
> >> This driver is not only for rk805, but also intend for rk816 and furtrue
> >> PMICs.
> >> The rk816 has one multi function pin(TS/GPIO), when setting as gpio, it
> >> can be configured as output or input.
> >> Here is simple description from manual: "Thermistor input. Connect a
> >> thermistor from this pin to ground. The thermistor is usually inside the
> >> battery pack. (multi-function for GPIO) ".
> > As Linus suggested, this sounds like you want a pinctrl driver that
> > also handles the gpios.
> >
> > Ideally you might also directly provide support for this rk816 in the
> > same patch series, so reviewers can see the full extend of what is
> > supported.
> >
> >
> > Heiko
> >
> 
> Hi, Heiko:
> 
>       I have moved gpio-rk805.c to drivers/pinctrl/pinctrl-rk805.c, this 
> driver is also designed for rk816 or furture PMICs to extend.
>       RK816 is not in our team's plan at this porting, it will be added 
> at next time, so I don't directly provide rk816 in this driver. I will 
> add more descriptions in commit message to express my design purpose.
> 
>       Are you agreed ?  If so, I will send [PATCH v7] today.

yep, sounds good. But we will of course see more, once you have sent
the patches :-) .


Heiko