From: Gregory Fong <gregory.0xf0@gmail.com> To: Doug Berger <opendmb@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org>, Brian Norris <computersforpeace@gmail.com>, Florian Fainelli <f.fainelli@gmail.com>, bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>, linux-gpio@vger.kernel.org, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org> Subject: Re: [PATCH 5/7] gpio: brcmstb: enable masking of interrupts when changing type Date: Tue, 3 Oct 2017 19:10:59 -0700 [thread overview] Message-ID: <CADtm3G5oWZTZ7OkAko9_5ge_eOG7FRaEd702rqh55hJnnFi5ow@mail.gmail.com> (raw) In-Reply-To: <20170930034057.15166-6-opendmb@gmail.com> Hi Doug, On Fri, Sep 29, 2017 at 8:40 PM, Doug Berger <opendmb@gmail.com> wrote: > Mask the GPIO interrupt while its type is being changed, just in case > it can prevent a spurious interrupt. "Just in case"? I don't have access to hardware documentation for this anymore, but I'd expect to some stronger claim that the hardware actually requires masking before changing the trigger type. If you can quote documentation for this or explain an actual problem seen, that would be good. > > Signed-off-by: Doug Berger <opendmb@gmail.com> > --- > drivers/gpio/gpio-brcmstb.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c > index 0418cb266586..e2fff559c1ca 100644 > --- a/drivers/gpio/gpio-brcmstb.c > +++ b/drivers/gpio/gpio-brcmstb.c > @@ -363,7 +363,9 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev, > bank->irq_chip.irq_set_type = brcmstb_gpio_irq_set_type; > > /* Ensures that all non-wakeup IRQs are disabled at suspend */ > - bank->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND; > + /* and that interrupts are masked when changing their type */ This doesn't follow the kernel multi-line comment style, please adjust. > + bank->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND | > + IRQCHIP_SET_TYPE_MASKED; > > if (IS_ENABLED(CONFIG_PM_SLEEP) && !priv->parent_wake_irq && > of_property_read_bool(np, "wakeup-source")) { > -- > 2.14.1 > Thanks, Gregory
WARNING: multiple messages have this Message-ID (diff)
From: gregory.0xf0@gmail.com (Gregory Fong) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 5/7] gpio: brcmstb: enable masking of interrupts when changing type Date: Tue, 3 Oct 2017 19:10:59 -0700 [thread overview] Message-ID: <CADtm3G5oWZTZ7OkAko9_5ge_eOG7FRaEd702rqh55hJnnFi5ow@mail.gmail.com> (raw) In-Reply-To: <20170930034057.15166-6-opendmb@gmail.com> Hi Doug, On Fri, Sep 29, 2017 at 8:40 PM, Doug Berger <opendmb@gmail.com> wrote: > Mask the GPIO interrupt while its type is being changed, just in case > it can prevent a spurious interrupt. "Just in case"? I don't have access to hardware documentation for this anymore, but I'd expect to some stronger claim that the hardware actually requires masking before changing the trigger type. If you can quote documentation for this or explain an actual problem seen, that would be good. > > Signed-off-by: Doug Berger <opendmb@gmail.com> > --- > drivers/gpio/gpio-brcmstb.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c > index 0418cb266586..e2fff559c1ca 100644 > --- a/drivers/gpio/gpio-brcmstb.c > +++ b/drivers/gpio/gpio-brcmstb.c > @@ -363,7 +363,9 @@ static int brcmstb_gpio_irq_setup(struct platform_device *pdev, > bank->irq_chip.irq_set_type = brcmstb_gpio_irq_set_type; > > /* Ensures that all non-wakeup IRQs are disabled at suspend */ > - bank->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND; > + /* and that interrupts are masked when changing their type */ This doesn't follow the kernel multi-line comment style, please adjust. > + bank->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND | > + IRQCHIP_SET_TYPE_MASKED; > > if (IS_ENABLED(CONFIG_PM_SLEEP) && !priv->parent_wake_irq && > of_property_read_bool(np, "wakeup-source")) { > -- > 2.14.1 > Thanks, Gregory
next prev parent reply other threads:[~2017-10-04 2:10 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-09-30 3:40 [PATCH 0/7] gpio: brcmstb: improved interrupt and wake support Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-09-30 3:40 ` [PATCH 1/7] gpio: brcmstb: allow all instances to be wakeup sources Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-10-04 1:40 ` Gregory Fong 2017-10-04 1:40 ` Gregory Fong 2017-10-04 1:40 ` Gregory Fong 2017-10-07 10:52 ` Linus Walleij 2017-10-07 10:52 ` Linus Walleij 2017-10-07 10:52 ` Linus Walleij 2017-09-30 3:40 ` [PATCH 2/7] gpio: brcmstb: release the bgpio lock during irq handlers Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-10-04 1:55 ` Gregory Fong 2017-10-04 1:55 ` Gregory Fong 2017-10-04 1:55 ` Gregory Fong 2017-10-04 2:09 ` Doug Berger 2017-10-04 2:09 ` Doug Berger 2017-10-04 2:09 ` Doug Berger 2017-10-04 3:07 ` Gregory Fong 2017-10-04 3:07 ` Gregory Fong 2017-10-04 3:07 ` Gregory Fong 2017-09-30 3:40 ` [PATCH 3/7] gpio: brcmstb: switch to handle_level_irq flow Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-10-04 1:59 ` Gregory Fong 2017-10-04 1:59 ` Gregory Fong 2017-10-04 1:59 ` Gregory Fong 2017-09-30 3:40 ` [PATCH 4/7] gpio: brcmstb: correct the configuration of level interrupts Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-10-04 2:03 ` Gregory Fong 2017-10-04 2:03 ` Gregory Fong 2017-10-04 2:03 ` Gregory Fong 2017-09-30 3:40 ` [PATCH 5/7] gpio: brcmstb: enable masking of interrupts when changing type Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-10-04 2:10 ` Gregory Fong [this message] 2017-10-04 2:10 ` Gregory Fong 2017-10-04 2:10 ` Gregory Fong 2017-10-04 2:22 ` Doug Berger 2017-10-04 2:22 ` Doug Berger 2017-10-04 2:22 ` Doug Berger 2017-10-04 3:15 ` Gregory Fong 2017-10-04 3:15 ` Gregory Fong 2017-10-04 3:15 ` Gregory Fong 2017-09-30 3:40 ` [PATCH 6/7] gpio: brcmstb: consolidate interrupt domains Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-10-04 3:03 ` Gregory Fong 2017-10-04 3:03 ` Gregory Fong 2017-10-04 3:03 ` Gregory Fong 2017-10-04 21:24 ` Doug Berger 2017-10-04 21:24 ` Doug Berger 2017-10-04 21:24 ` Doug Berger 2017-10-16 23:04 ` Doug Berger 2017-10-16 23:04 ` Doug Berger 2017-10-16 23:04 ` Doug Berger 2017-10-19 7:57 ` Gregory Fong 2017-10-19 7:57 ` Gregory Fong 2017-10-19 7:57 ` Gregory Fong 2017-10-19 18:25 ` Doug Berger 2017-10-19 18:25 ` Doug Berger 2017-10-19 18:25 ` Doug Berger 2017-09-30 3:40 ` [PATCH 7/7] gpio: brcmstb: implement suspend/resume/shutdown Doug Berger 2017-09-30 3:40 ` Doug Berger 2017-10-19 9:03 ` Gregory Fong 2017-10-19 9:03 ` Gregory Fong 2017-10-19 18:39 ` Doug Berger 2017-10-19 18:39 ` Doug Berger 2017-10-21 0:54 ` Gregory Fong 2017-10-21 0:54 ` Gregory Fong 2017-10-21 0:54 ` Gregory Fong 2017-10-23 23:06 ` Doug Berger 2017-10-23 23:06 ` Doug Berger 2017-10-23 23:06 ` Doug Berger 2017-09-30 5:34 ` [PATCH 0/7] gpio: brcmstb: improved interrupt and wake support Florian Fainelli 2017-09-30 5:34 ` Florian Fainelli 2017-10-07 10:54 ` Linus Walleij 2017-10-07 10:54 ` Linus Walleij 2017-10-07 10:54 ` Linus Walleij
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