linux-kernel - Re: [PATCH v6 2/5] MFD: RK808: Add new mfd driver for RK808

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Message-ID: <CAD=FV=X1GY+uUqt7fHETnt=qmPpLp+qtasvVZN8dXC4gxTYX-g@mail.gmail.com>
Date:	Tue, 26 Aug 2014 10:08:08 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Chris Zhong <zyw@...k-chips.com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	"broonie@...nel.org" <broonie@...nel.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Mike Turquette <mturquette@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	rtc-linux@...glegroups.com, Grant Likely <grant.likely@...aro.org>,
	Lin Huang <hl@...k-chips.com>,
	Tao Huang <huangtao@...k-chips.com>,
	Eddie Cai <cf@...k-chips.com>,
	zhangqing <zhangqing@...k-chips.com>, xxx <xxx@...k-chips.com>,
	Heiko Stübner <heiko@...ech.de>,
	Olof Johansson <olof@...om.net>,
	Sonny Rao <sonnyrao@...omium.org>,
	Dmitry Torokhov <dtor@...omium.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Kever Yang <kever.yang@...k-chips.com>
Subject: Re: [PATCH v6 2/5] MFD: RK808: Add new mfd driver for RK808

Chris,

On Tue, Aug 26, 2014 at 7:14 AM, Chris Zhong <zyw@...k-chips.com> wrote:
> +static struct regmap_irq_chip rk808_irq_chip = {
> +       .name = "rk808",
> +       .irqs = rk808_irqs,
> +       .num_irqs = ARRAY_SIZE(rk808_irqs),
> +       .num_regs = 2,
> +       .irq_reg_stride = 2,
> +       .status_base = RK808_INT_STS_REG1,
> +       .mask_base = RK808_INT_STS_MSK_REG1,
> +       .ack_base = RK808_INT_STS_REG1,

Can you add ".init_ack_masked = true" here?  If I don't do that and I
boot with the IRQ configured as "level low" then the system will just
keep getting IRQs that it can't handle and eventually disable the
whole rk808.  If I boot with the IRQ as "falling edge" then the system
will never get RTC alarms.

I posted this fixup with an explanation at
<https://chromium-review.googlesource.com/#/c/214241/> and it could be
squashed into your patch.
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