| Message ID | 1442850433-5903-13-git-send-email-sudeep.holla@arm.com |
|---|---|
| State | New |
| Headers | show |
* Sudeep Holla <sudeep.holla@arm.com> [150921 08:52]: > The IRQF_NO_SUSPEND flag is used to identify the interrupts that should > be left enabled so as to allow them to work as expected during the > suspend-resume cycle, but doesn't guarantee that it will wake the system > from a suspended state, enable_irq_wake is recommended to be used for > the wakeup. > > This patch removes the use of IRQF_NO_SUSPEND flags replacing it with > enable_irq_wake instead. Applying into omap-for-v4.4/cleanup thanks. Tony -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
* Tony Lindgren <tony@atomide.com> [151012 13:27]: > * Sudeep Holla <sudeep.holla@arm.com> [150921 08:52]: > > The IRQF_NO_SUSPEND flag is used to identify the interrupts that should > > be left enabled so as to allow them to work as expected during the > > suspend-resume cycle, but doesn't guarantee that it will wake the system > > from a suspended state, enable_irq_wake is recommended to be used for > > the wakeup. > > > > This patch removes the use of IRQF_NO_SUSPEND flags replacing it with > > enable_irq_wake instead. > > Applying into omap-for-v4.4/cleanup thanks. Actually I don't think this does the right thing. The interrupts in the $subject patch are in the always on powerdomain, and we really want them to be excluded from the suspend. So not applying without further explanations. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
On 12/10/15 21:28, Tony Lindgren wrote: > * Tony Lindgren <tony@atomide.com> [151012 13:27]: >> * Sudeep Holla <sudeep.holla@arm.com> [150921 08:52]: >>> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should >>> be left enabled so as to allow them to work as expected during the >>> suspend-resume cycle, but doesn't guarantee that it will wake the system >>> from a suspended state, enable_irq_wake is recommended to be used for >>> the wakeup. >>> >>> This patch removes the use of IRQF_NO_SUSPEND flags replacing it with >>> enable_irq_wake instead. >> >> Applying into omap-for-v4.4/cleanup thanks. > > Actually I don't think this does the right thing. The interrupts > in the $subject patch are in the always on powerdomain, and we really Agreed > want them to be excluded from the suspend. > OK but what's wrong with this patch. At-least the name suggest it's a wakeup interrupt. And using IRQF_NO_SUSPEND for the wakeup interrupt is simply wrong. > So not applying without further explanations. > But I don't understand the real need for IRQF_NO_SUSPEND over wakeup APIs ?
* Sudeep Holla <sudeep.holla@arm.com> [151013 03:46]: > > > On 12/10/15 21:28, Tony Lindgren wrote: > >* Tony Lindgren <tony@atomide.com> [151012 13:27]: > >>* Sudeep Holla <sudeep.holla@arm.com> [150921 08:52]: > >>>The IRQF_NO_SUSPEND flag is used to identify the interrupts that should > >>>be left enabled so as to allow them to work as expected during the > >>>suspend-resume cycle, but doesn't guarantee that it will wake the system > >>>from a suspended state, enable_irq_wake is recommended to be used for > >>>the wakeup. > >>> > >>>This patch removes the use of IRQF_NO_SUSPEND flags replacing it with > >>>enable_irq_wake instead. > >> > >>Applying into omap-for-v4.4/cleanup thanks. > > > >Actually I don't think this does the right thing. The interrupts > >in the $subject patch are in the always on powerdomain, and we really > > Agreed > > >want them to be excluded from the suspend. > > > > OK but what's wrong with this patch. At-least the name suggest it's a > wakeup interrupt. And using IRQF_NO_SUSPEND for the wakeup interrupt is > simply wrong. Hmm so if we have a separate always on irq controller for the wake-up events and we want to keep it always on and exclude it from any suspend related things.. Why would we not use IRQF_NO_SUSPEND on it? Above you say "The IRQF_NO_SUSPEND flag is used to identify the interrupts that should be left enabled so as to allow them to work as expected during the suspend-resume cycle..." and that's exactly what we want to do here :) For the dedicated wake-up interrupts, we have separate registers to enable and disable them. The $subject irq is the shared interrupt that allows making use of the pin specific wake-up interrupts, and for those yes we are using enable_irq_wake(). > >So not applying without further explanations. > > > > But I don't understand the real need for IRQF_NO_SUSPEND over wakeup APIs ? Because in the $subject case we just want to always keep it on and never suspend it. It's unrelated to the wakeup APIs at least for the omap related SoCs. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 13/10/15 15:53, Tony Lindgren wrote: > * Sudeep Holla <sudeep.holla@arm.com> [151013 03:46]: >> >> >> On 12/10/15 21:28, Tony Lindgren wrote: >>> * Tony Lindgren <tony@atomide.com> [151012 13:27]: >>>> * Sudeep Holla <sudeep.holla@arm.com> [150921 08:52]: >>>>> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should >>>>> be left enabled so as to allow them to work as expected during the >>>>> suspend-resume cycle, but doesn't guarantee that it will wake the system >>>> >from a suspended state, enable_irq_wake is recommended to be used for >>>>> the wakeup. >>>>> >>>>> This patch removes the use of IRQF_NO_SUSPEND flags replacing it with >>>>> enable_irq_wake instead. >>>> >>>> Applying into omap-for-v4.4/cleanup thanks. >>> >>> Actually I don't think this does the right thing. The interrupts >>> in the $subject patch are in the always on powerdomain, and we really >> >> Agreed >> >>> want them to be excluded from the suspend. >>> >> >> OK but what's wrong with this patch. At-least the name suggest it's a >> wakeup interrupt. And using IRQF_NO_SUSPEND for the wakeup interrupt is >> simply wrong. > > Hmm so if we have a separate always on irq controller for the wake-up events > and we want to keep it always on and exclude it from any suspend related > things.. Why would we not use IRQF_NO_SUSPEND on it? > > Above you say "The IRQF_NO_SUSPEND flag is used to identify the interrupts > that should be left enabled so as to allow them to work as expected during > the suspend-resume cycle..." and that's exactly what we want to do here :) > OK if these interrupts meet that criteria to use IRQF_NO_SUSPEND, then it should be fine, my earlier argument was based on the assumption that it's just another wakeup interrupt. > For the dedicated wake-up interrupts, we have separate registers to enable > and disable them. The $subject irq is the shared interrupt that allows > making use of the pin specific wake-up interrupts, and for those yes we > are using enable_irq_wake(). > If it's already take care, then fine. I am just hunting all the misuse of IRQF_NO_SUSPEND flag especially as wakeup source and fixing them >>> So not applying without further explanations. >>> >> >> But I don't understand the real need for IRQF_NO_SUSPEND over wakeup APIs ? > > Because in the $subject case we just want to always keep it on and > never suspend it. It's unrelated to the wakeup APIs at least for the > omap related SoCs. > OK, understood now. Thanks -- Regards, Sudeep -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c index 176eef6ef338..12012bef8e63 100644 --- a/arch/arm/mach-omap2/mux.c +++ b/arch/arm/mach-omap2/mux.c @@ -810,13 +810,13 @@ int __init omap_mux_late_init(void) return 0; ret = request_irq(omap_prcm_event_to_irq("io"), - omap_hwmod_mux_handle_irq, IRQF_SHARED | IRQF_NO_SUSPEND, + omap_hwmod_mux_handle_irq, IRQF_SHARED, "hwmod_io", omap_mux_late_init); if (ret) pr_warn("mux: Failed to setup hwmod io irq %d\n", ret); - return 0; + return enable_irq_wake(omap_prcm_event_to_irq("io")); } static void __init omap_mux_package_fixup(struct omap_mux *p, diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 87b98bf92366..4b7ac7cd633a 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -472,23 +472,22 @@ int __init omap3_pm_init(void) prcm_setup_regs(); ret = request_irq(omap_prcm_event_to_irq("wkup"), - _prcm_int_handle_wakeup, IRQF_NO_SUSPEND, "pm_wkup", NULL); + _prcm_int_handle_wakeup, 0, "pm_wkup", NULL); if (ret) { pr_err("pm: Failed to request pm_wkup irq\n"); goto err1; } + enable_irq_wake(omap_prcm_event_to_irq("wkup")); /* IO interrupt is shared with mux code */ ret = request_irq(omap_prcm_event_to_irq("io"), - _prcm_int_handle_io, IRQF_SHARED | IRQF_NO_SUSPEND, "pm_io", - omap3_pm_init); - enable_irq(omap_prcm_event_to_irq("io")); - + _prcm_int_handle_io, IRQF_SHARED, "pm_io", omap3_pm_init); if (ret) { pr_err("pm: Failed to request pm_io irq\n"); goto err2; } + enable_irq_wake(omap_prcm_event_to_irq("io")); ret = pwrdm_for_each(pwrdms_setup, NULL); if (ret) {
The IRQF_NO_SUSPEND flag is used to identify the interrupts that should be left enabled so as to allow them to work as expected during the suspend-resume cycle, but doesn't guarantee that it will wake the system from a suspended state, enable_irq_wake is recommended to be used for the wakeup. This patch removes the use of IRQF_NO_SUSPEND flags replacing it with enable_irq_wake instead. Cc: Tony Lindgren <tony@atomide.com> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: linux-omap@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- arch/arm/mach-omap2/mux.c | 4 ++-- arch/arm/mach-omap2/pm34xx.c | 9 ++++----- 2 files changed, 6 insertions(+), 7 deletions(-)