linux-kernel - Re: [PATCH 2/2] pwm: sprd: Add Spreadtrum PWM support

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Date:   Tue, 13 Aug 2019 21:43:56 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-pwm@...r.kernel.org, DTML <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel@...gutronix.de
Subject: Re: [PATCH 2/2] pwm: sprd: Add Spreadtrum PWM support

Hi Uwe,

On Fri, 9 Aug 2019 at 18:06, Baolin Wang <baolin.wang@...aro.org> wrote:
>
>  Hi Uwe,
>
> On Fri, 9 Aug 2019 at 17:10, Uwe Kleine-König
> <u.kleine-koenig@...gutronix.de> wrote:
> >
> > On Thu, Aug 08, 2019 at 04:59:39PM +0800, Baolin Wang wrote:
> > > From: Neo Hou <neo.hou@...soc.com>
> > >
> > > This patch adds the Spreadtrum PWM support, which provides maximum 4
> > > channels.
> > >
> > > Signed-off-by: Neo Hou <neo.hou@...soc.com>
> > > Co-developed-by: Baolin Wang <baolin.wang@...aro.org>
> > > Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
> > > ---
> > >  drivers/pwm/Kconfig    |   10 ++
> > >  drivers/pwm/Makefile   |    1 +
> > >  drivers/pwm/pwm-sprd.c |  311 ++++++++++++++++++++++++++++++++++++++++++++++++
> > >  3 files changed, 322 insertions(+)
> > >  create mode 100644 drivers/pwm/pwm-sprd.c
> > >
> > > diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
> > > index a7e5751..4963b4d 100644
> > > --- a/drivers/pwm/Kconfig
> > > +++ b/drivers/pwm/Kconfig
> > > @@ -423,6 +423,16 @@ config PWM_SPEAR
> > >         To compile this driver as a module, choose M here: the module
> > >         will be called pwm-spear.
> > >
> > > +config PWM_SPRD
> > > +     tristate "Spreadtrum PWM support"
> > > +     depends on ARCH_SPRD || COMPILE_TEST
> >
> > I think you need
> >
> >         depends on HAS_IOMEM
>
> OK.
>
> >
> > > +     help
> > > +       Generic PWM framework driver for the PWM controller on
> > > +       Spreadtrum SoCs.
> > > +
> > > +       To compile this driver as a module, choose M here: the module
> > > +       will be called pwm-sprd.
> > > +
> > >  config PWM_STI
> > >       tristate "STiH4xx PWM support"
> > >       depends on ARCH_STI
> > > diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile
> > > index 76b555b..26326ad 100644
> > > --- a/drivers/pwm/Makefile
> > > +++ b/drivers/pwm/Makefile
> > > @@ -41,6 +41,7 @@ obj-$(CONFIG_PWM_ROCKCHIP)  += pwm-rockchip.o
> > >  obj-$(CONFIG_PWM_SAMSUNG)    += pwm-samsung.o
> > >  obj-$(CONFIG_PWM_SIFIVE)     += pwm-sifive.o
> > >  obj-$(CONFIG_PWM_SPEAR)              += pwm-spear.o
> > > +obj-$(CONFIG_PWM_SPRD)               += pwm-sprd.o
> > >  obj-$(CONFIG_PWM_STI)                += pwm-sti.o
> > >  obj-$(CONFIG_PWM_STM32)              += pwm-stm32.o
> > >  obj-$(CONFIG_PWM_STM32_LP)   += pwm-stm32-lp.o
> > > diff --git a/drivers/pwm/pwm-sprd.c b/drivers/pwm/pwm-sprd.c
> > > new file mode 100644
> > > index 0000000..f6fc793
> > > --- /dev/null
> > > +++ b/drivers/pwm/pwm-sprd.c
> > > @@ -0,0 +1,311 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + * Copyright (C) 2019 Spreadtrum Communications Inc.
> >
> > If there is a publicly available reference manual available, please add
> > a link to it here.
>
> Sure.

Sorry, we have not supplied a publicly available reference manual now.
So no change for this comment in next version.

-- 
Baolin Wang
Best Regards