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From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: William McVicker <willmcvicker@google.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>
Cc: "Russell King" <linux@armlinux.org.uk>,
	"Catalin Marinas" <catalin.marinas@arm.com>,
	"Will Deacon" <will@kernel.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	"Alim Akhtar" <alim.akhtar@samsung.com>,
	"Ingo Molnar" <mingo@kernel.org>,
	"Peter Griffin" <peter.griffin@linaro.org>,
	"Youngmin Nam" <youngmin.nam@samsung.com>,
	"Donghoon Yu" <hoony.yu@samsung.com>,
	"Rob Herring" <robh@kernel.org>,
	"Saravana Kannan" <saravanak@google.com>,
	"John Stultz" <jstultz@google.com>,
	"Tudor Ambarus" <tudor.ambarus@linaro.org>,
	"André Draszik" <andre.draszik@linaro.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	linux-samsung-soc@vger.kernel.org, kernel-team@android.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 6/7] clocksource/drivers/exynos_mct: Add module support
Date: Mon, 17 Nov 2025 12:46:24 +0100	[thread overview]
Message-ID: <f1c5a4b6-3e75-418d-b7d8-7899dcd28ca3@linaro.org> (raw)
In-Reply-To: <aPuhDFKINM9iXOKb@google.com>


Hi Will,

On 10/24/25 17:53, William McVicker wrote:
> On 10/24/2025, Marek Szyprowski wrote:
>> On 23.10.2025 22:52, Will McVicker wrote:
>>> From: Donghoon Yu <hoony.yu@samsung.com>

[ ... ]
>> Sorry, but this still won't work on legacy ARM 32bit systems with MCT as
>> the only clocksource, which needs a driver available very early (that's
>> why it used TIMER_OF_DECLAREmacro). You need to make it conditional
>> under CONFIG_ARM:
> 
> Can we rely on the bootloader to setup the MCT timer and then hand-off at boot
> once the driver is initialized?
> 
> Daniel was working on a solution to transparently handle calling
> TIMER_OF_DECLARE() when a timer driver can be configured as both a module or
> built-in here:
> 
>    https://lore.kernel.org/all/20250625085715.889837-1-daniel.lezcano@linaro.org/
> 
> Daniel, do you have plans to finish that? In the meantime, can we go with the
> `#if CONFIG_ARM` solution?

I have a plan to finish that but it is low in my priority list. So I 
guess we can go for the CONFIG_ARM solution in the meantime.



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  parent reply	other threads:[~2025-11-17 11:46 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-23 20:52 [PATCH v5 0/7] Add module support for Arm64 Exynos MCT driver Will McVicker
2025-10-23 20:52 ` [PATCH v5 1/7] ARM: make register_current_timer_delay() accessible after init Will McVicker
2025-10-23 20:52 ` [PATCH v5 2/7] clocksource/drivers/exynos_mct: Don't register as a sched_clock on arm64 Will McVicker
2025-10-23 20:52 ` [PATCH v5 3/7] clocksource/drivers/exynos_mct: Set local timer interrupts as percpu Will McVicker
2025-10-23 20:52 ` [PATCH v5 4/7] clocksource/drivers/exynos_mct: Use percpu interrupts only on ARM64 Will McVicker
2025-10-24 11:19   ` Marek Szyprowski
2025-10-24 15:54     ` William McVicker
2025-10-23 20:52 ` [PATCH v5 5/7] clocksource/drivers/exynos_mct: Fix uninitialized irq name warning Will McVicker
2025-10-23 20:52 ` [PATCH v5 6/7] clocksource/drivers/exynos_mct: Add module support Will McVicker
2025-10-24 11:14   ` Marek Szyprowski
2025-10-24 15:53     ` William McVicker
2025-10-24 16:01       ` Marek Szyprowski
2025-11-17 11:46       ` Daniel Lezcano [this message]
2025-10-23 20:52 ` [PATCH v5 7/7] arm64: exynos: Drop select CLKSRC_EXYNOS_MCT Will McVicker
2025-10-23 20:57 ` [PATCH v5 0/7] Add module support for Arm64 Exynos MCT driver William McVicker

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