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Date: Sat, 26 Dec 2020 19:34:26 +0200 From: Andy Shevchenko <andy.shevchenko@...il.com> To: Nikita Shubin <nikita.shubin@...uefel.me> Cc: Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski <bgolaszewski@...libre.com>, "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [RFC PATCH 0/3] gpio: ep93xx: convert to multi irqchips On Thu, Dec 24, 2020 at 1:24 PM Nikita Shubin <nikita.shubin@...uefel.me> 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. I personally consider it quite nice to have support even for outdated hardware (reminds me about a recent LWN article about 32-bit architectures and a comment there how it could affect the environment if we drop them from being supported). So I fully support this series. -- With Best Regards, Andy Shevchenko
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