linux-kernel - [PATCH v3] clocksource: sp804: Make user selectable

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Message-Id: <20241001-arm64-vexpress-sp804-v3-1-0a2d3f7883e4@kernel.org>
Date: Tue, 01 Oct 2024 12:23:56 +0100
From: Mark Brown <broonie@...nel.org>
To: Daniel Lezcano <daniel.lezcano@...aro.org>, 
 Thomas Gleixner <tglx@...utronix.de>, 
 David Abdurachmanov <david.abdurachmanov@...il.com>
Cc: Sudeep Holla <sudeep.holla@....com>, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Ross Burton <ross.burton@....com>, Mark Rutland <mark.rutland@....com>, 
 Mark Brown <broonie@...nel.org>
Subject: [PATCH v3] clocksource: sp804: Make user selectable

The sp804 is currently only user selectable if COMPILE_TEST, this was
done by commit dfc82faad725 ("clocksource/drivers/sp804: Add
COMPILE_TEST to CONFIG_ARM_TIMER_SP804") in order to avoid it being
spuriously offered on platforms that won't have the hardware since it's
generally only seen on Arm based platforms.  This config is overly
restrictive, while platforms that rely on the SP804 do select it in
their Kconfig there are others such as the Arm fast models which have a
SP804 available but currently unused by Linux.  Relax the dependency to
allow it to be user selectable on arm and arm64 to avoid surprises and
in case someone comes up with a use for extra timer hardware.

Fixes: dfc82faad725 ("clocksource/drivers/sp804: Add COMPILE_TEST to CONFIG_ARM_TIMER_SP804")
Reported-by: Ross Burton <ross.burton@....com>
Reviewed-by: Sudeep Holla <sudeep.holla@....com>
Acked-by: Mark Rutland <mark.rutland@....com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
Changes in v3:
- Rebase onto v6.12-rc1.
- Link to v2: https://lore.kernel.org/r/20240529-arm64-vexpress-sp804-v2-1-c542a80af33a@kernel.org

Changes in v2:
- Rebase onto v6.10-rc1.
- Link to v1: https://lore.kernel.org/r/20240522-arm64-vexpress-sp804-v1-1-0344cd42eb77@kernel.org
---
 drivers/clocksource/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 95dd4660b5b6..d546903dba4f 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -400,7 +400,8 @@ config ARM_GT_INITIAL_PRESCALER_VAL
 	  This affects CPU_FREQ max delta from the initial frequency.
 
 config ARM_TIMER_SP804
-	bool "Support for Dual Timer SP804 module" if COMPILE_TEST
+	bool "Support for Dual Timer SP804 module"
+	depends on ARM || ARM64 || COMPILE_TEST
 	depends on GENERIC_SCHED_CLOCK && HAVE_CLK
 	select CLKSRC_MMIO
 	select TIMER_OF if OF

---
base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc
change-id: 20240522-arm64-vexpress-sp804-365d6938b07c

Best regards,
-- 
Mark Brown <broonie@...nel.org>