Re: [PATCH v5 00/10] ASPEED sgpio driver enhancement.

From: Steven Lee <steven_lee@aspeedtech.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	Rob Herring <robh+dt@kernel.org>, Joel Stanley <joel@jms.id.au>,
	Andrew Jeffery <andrew@aj.id.au>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@vger.kernel.org>,
	"moderated list:ARM/ASPEED MACHINE SUPPORT" 
	<linux-arm-kernel@lists.infradead.org>,
	"moderated list:ARM/ASPEED MACHINE SUPPORT" 
	<linux-aspeed@lists.ozlabs.org>,
	open list <linux-kernel@vger.kernel.org>,
	Hongwei Zhang <Hongweiz@ami.com>,
	Ryan Chen <ryan_chen@aspeedtech.com>,
	Billy Tsai <billy_tsai@aspeedtech.com>
Subject: Re: [PATCH v5 00/10] ASPEED sgpio driver enhancement.
Date: Thu, 10 Jun 2021 10:24:19 +0800	[thread overview]
Message-ID: <20210610022416.GA27188@aspeedtech.com> (raw)
In-Reply-To: <CACRpkdZOStr+K9U9QTkAcsk4NxuSqBRVv_-9_VkGJbT69iSxmQ@mail.gmail.com>

The 06/09/2021 18:54, Linus Walleij wrote:
> On Tue, Jun 8, 2021 at 12:26 PM Steven Lee <steven_lee@aspeedtech.com> wrote:
> 
> > AST2600 SoC has 2 SGPIO master interfaces one with 128 pins another one
> > with 80 pins, AST2500/AST2400 SoC has 1 SGPIO master interface that
> > supports up to 80 pins.
> > In the current driver design, the max number of sgpio pins is hardcoded
> > in macro MAX_NR_HW_SGPIO and the value is 80.
> >
> > For supporting sgpio master interfaces of AST2600 SoC, the patch series
> > contains the following enhancement:
> > - Convert txt dt-bindings to yaml.
> > - Update aspeed-g6 dtsi to support the enhanced sgpio.
> > - Define max number of gpio pins in ast2600 platform data. Old chip
> >   uses the original hardcoded value.
> > - Support muiltiple SGPIO master interfaces.
> > - Support up to 128 pins.
> > - Support wdt reset tolerance.
> > - Fix irq_chip issues which causes multiple sgpio devices use the same
> >   irq_chip data.
> > - Replace all of_*() APIs with device_*().
> >
> > Changes from v4:
> 
> v5 looks good to me!
> 
> I just need Rob's or another DT persons nod on the bindings (or timeout)
> before I merge it. Poke me if nothing happens.
> 
> >   ARM: dts: aspeed-g6: Add SGPIO node.
> >   ARM: dts: aspeed-g5: Remove ngpios from sgpio node.
> 
> These two need to be merged through the SoC tree, the rest I will handle.
> 
Hi Linus, Andrew,

Per the comment in the following mail
https://lkml.org/lkml/2021/6/9/317

I was wondering if I should prepare v6 for the currnet solution or
I should drop this patch series then prepare another patch for the
new solution(piar GPIO input/output) which breaks userspace but is
better than the current solution.

Thanks,
Steven

> Yours,
> Linus Walleij