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From: Linus Walleij <>
To: Nikita Shubin <>,
	Hartley Sweeten <>
Cc: Bartosz Golaszewski <>,
	"open list:GPIO SUBSYSTEM" <>,
	"" <>
Subject: Re: [RFC PATCH 0/3] gpio: ep93xx: convert to multi irqchips
Date: Sun, 27 Dec 2020 14:55:08 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Paging Hartley who I think uses this chip.

On Thu, Dec 24, 2020 at 12:22 PM Nikita Shubin
<> wrote:

> I was lucky enough to became an owner of some splendid piece's of
> antiques called ts7250 based on the top of Cirrus Logic EP9302.
> I don't know what fate expects this hardware (it's not EOL it's just Not
> recommended for new designs) but i wanted to share fixes in ep93xx gpio area.
> It seems ep93xx is deadly broken at current state usage of AB gpiochips
> interrupts leads to deadlocks coused by irq_unmask/irq_mask recursions.
> Port F is not working at all:

Yeah when I converted this gpio driver I did not have access to a hardware
which made use of port F :(

I used the SIM.One board but they all died on me, then I acquired another
EP93xx board that I just didn't have time to test.

The long term plan is to convert these boards to use device tree and
multiplatform. Interested in the job? ;)

Thanks for fixing up the GPIO chip, let's get the patches in shape and
merge as fixes. Bartosz is handling the fixes right now, I'll try to review too!

Linus Walleij

  parent reply	other threads:[~2020-12-27 13:56 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-24 11:22 [RFC PATCH 0/3] gpio: ep93xx: convert to multi irqchips Nikita Shubin
2020-12-24 11:22 ` [RFC PATCH 1/3] " Nikita Shubin
2020-12-26 17:52   ` Andy Shevchenko
2020-12-28 15:05     ` nikita.shubin
2020-12-24 11:22 ` [RFC PATCH 2/3] gpio: ep93xx: drop to_irq binding Nikita Shubin
2020-12-27 21:21   ` Linus Walleij
2021-01-04 14:17     ` Bartosz Golaszewski
2020-12-24 11:22 ` [RFC PATCH 3/3] gpio: ep93xx: specify gpio_irq_chip->first Nikita Shubin
2020-12-27 21:22   ` Linus Walleij
2020-12-26 17:34 ` [RFC PATCH 0/3] gpio: ep93xx: convert to multi irqchips Andy Shevchenko
2020-12-27 14:00   ` Linus Walleij
2020-12-27 13:55 ` Linus Walleij [this message]
2020-12-28 15:14   ` nikita.shubin
2020-12-28 20:41     ` Linus Walleij

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