linux-kernel - [PATCH v1 0/2] clocksource/drivers/arm_global

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Message-ID: <20240218174138.1942418-1-martin.blumenstingl@googlemail.com>
Date: Sun, 18 Feb 2024 18:41:36 +0100
From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To: daniel.lezcano@...aro.org,
	tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	andrea.merello@...il.com,
	patrice.chotard@...s.st.com,
	linux-amlogic@...ts.infradead.org,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH v1 0/2] clocksource/drivers/arm_global_timer: Two small fixes

This series consists of two small fixes:
1) incorrect max width (and therefore mask calculation) of the prescaler
   field in the Global Timer Control Register. The field is actually 8
   bit wide according to the Cortex-A9 MPCore Technical Reference Manual
   r3p0 [0]
2) non-function: a stray tab which is inconsistent with to the coding
   style in the driver

I don't have any ARM/STI hardware to verify the first fix. However, I
tested this on an Amlogic Meson8b board with Cortex-A5 which uses the
same Global Timer implementation as Cortex-A9 SoCs and the documentation
confirms the same register layout: [1]

[0] https://developer.arm.com/documentation/ddi0407/g/Global-timer--private-timers--and-watchdog-registers/Global-timer-registers/Global-Timer-Control-Register
[1] https://developer.arm.com/documentation/ddi0434/b/CIHJGFEA

Martin Blumenstingl (2):
  clocksource/drivers/arm_global_timer: Fix maximum prescaler value
  clocksource/drivers/arm_global_timer: Remove stray tab

 drivers/clocksource/arm_global_timer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.43.2