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From: Tony Lindgren <tony@atomide.com>
To: Mark Brown <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
	Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
	Lee Jones <lee.jones@linaro.org>, Marcel Partap <mpartap@gmx.net>,
	Michael Scott <michael.scott@linaro.org>
Subject: Re: [PATCH 1/4] regmap: irq: Fix lost interrupts by introducing handle_reread
Date: Tue, 4 Apr 2017 06:56:30 -0700	[thread overview]
Message-ID: <20170404135629.GN10760@atomide.com> (raw)
In-Reply-To: <20170404121957.v64jcx2k4w3mwtje@sirena.org.uk>

* Mark Brown <broonie@kernel.org> [170404 05:22]:
> On Mon, Apr 03, 2017 at 08:03:00PM -0700, Tony Lindgren wrote:
> 
> > So I'll drop the genirq/regmap_irq related hacks and resend just
> > the minimal MFD fixes. Similar misconfiguration may be the root
> > cause for other drivers too..
> 
> It is sadly far too common for people to implement interrupt controllers
> that only do edge triggers, I've no idea why even on what are supposed
> to be relatively high end SoCs.  It seems to be a hardware designer
> thing, AFAICT they think for something to be useful it needs to be a bit
> more complicated.

For edge only GPIO controllers handling level interrupts might be
somewhat fixable in software. The GPIO controller could have a loop
reading of the GPIO line status in the interrupt handler and comparing
it to the configured triggering.

Regards,

Tony

  reply	other threads:[~2017-04-04 13:56 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-22 17:10 [PATCHv2 0/4] Regmap IRQ fix and related changes CPCAP Tony Lindgren
2017-03-22 17:10 ` [PATCH 1/4] regmap: irq: Fix lost interrupts by introducing handle_reread Tony Lindgren
2017-03-27 17:49   ` Mark Brown
2017-03-28  0:36     ` Tony Lindgren
2017-03-28 15:18       ` Mark Brown
2017-03-28 15:47         ` Tony Lindgren
2017-03-28 16:49           ` Mark Brown
2017-03-28 17:10             ` Tony Lindgren
2017-04-04  3:03               ` Tony Lindgren
2017-04-04 12:19                 ` Mark Brown
2017-04-04 13:56                   ` Tony Lindgren [this message]
2017-04-04 15:28                     ` Mark Brown
2017-04-03 11:27   ` Lee Jones
2017-03-22 17:10 ` [PATCH 2/4] mfd: cpcap: Use handle_reread flag for interrupts Tony Lindgren
2017-04-03 10:21   ` Lee Jones
2017-04-03 14:14     ` Tony Lindgren
2017-04-03 14:32       ` Lee Jones
2017-04-04  3:17         ` Tony Lindgren
2017-03-22 17:10 ` [PATCH 3/4] mfd: cpcap: Use ack_invert interrupts Tony Lindgren
2017-04-03 10:21   ` Lee Jones
2017-03-22 17:10 ` [PATCH 4/4] mfd: cpcap: Fix bad use of IRQ sense register Tony Lindgren
2017-04-03 10:21   ` Lee Jones
  -- strict thread matches above, loose matches on Subject: below --
2017-03-17  0:36 [PATCH 0/4] Regmap IRQ fix and related changes CPCAP Tony Lindgren
2017-03-17  0:36 ` [PATCH 1/4] regmap: irq: Fix lost interrupts by introducing handle_reread Tony Lindgren
2017-03-20 15:14   ` Charles Keepax
2017-03-20 15:14     ` Charles Keepax
2017-03-20 15:33     ` Tony Lindgren
2017-03-21  9:23       ` Charles Keepax
2017-03-21  9:23         ` Charles Keepax
2017-03-21 15:41         ` Tony Lindgren
2017-03-21 16:43           ` Charles Keepax
2017-03-21 16:43             ` Charles Keepax

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