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([2a05:6e02:1041:c10:b121:89be:2e42:dd71]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-477a81c567bsm901765e9.9.2025.11.17.03.46.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 Nov 2025 03:46:25 -0800 (PST) Message-ID: Date: Mon, 17 Nov 2025 12:46:24 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 6/7] clocksource/drivers/exynos_mct: Add module support To: William McVicker , Marek Szyprowski Cc: Russell King , Catalin Marinas , Will Deacon , Thomas Gleixner , Krzysztof Kozlowski , Alim Akhtar , Ingo Molnar , Peter Griffin , Youngmin Nam , Donghoon Yu , Rob Herring , Saravana Kannan , John Stultz , Tudor Ambarus , =?UTF-8?Q?Andr=C3=A9_Draszik?= , Conor Dooley , linux-samsung-soc@vger.kernel.org, kernel-team@android.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20251023205257.2029526-1-willmcvicker@google.com> <20251023205257.2029526-7-willmcvicker@google.com> <40d3f3c9-7526-440b-9dbd-7ead22c8562a@samsung.com> Content-Language: en-US From: Daniel Lezcano In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 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 [ ... ] >> 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. -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog