linux-kernel - [PATCH v2] clocksource/drivers/arm_arch_timer: Fix CNTPCT_LO and CNTVCT

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Message-ID: <20220927033221.49589-1-zhangshaokun@hisilicon.com>
Date:   Tue, 27 Sep 2022 11:32:21 +0800
From:   Shaokun Zhang <zhangshaokun@...ilicon.com>
To:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     Yang Guo <guoyang2@...wei.com>, <stable@...r.kernel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shaokun Zhang <zhangshaokun@...ilicon.com>
Subject: [PATCH v2] clocksource/drivers/arm_arch_timer: Fix CNTPCT_LO and CNTVCT_LO value

From: Yang Guo <guoyang2@...wei.com>

CNTPCT_LO and CNTVCT_LO are defined by mistake in commit '8b82c4f883a7',
so fix them according to the Arm ARM DDI 0487I.a, Table I2-4
"CNTBaseN memory map" as follows:

Offset    Register      Type Description
0x000     CNTPCT[31:0]  RO   Physical Count register.
0x004     CNTPCT[63:32] RO
0x008     CNTVCT[31:0]  RO   Virtual Count register.
0x00C     CNTVCT[63:32] RO

Fixes: 8b82c4f883a7 ("clocksource/drivers/arm_arch_timer: Move MMIO timer programming over to CVAL")
Cc: stable@...r.kernel.org
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Marc Zyngier <maz@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Acked-by: Marc Zyngier <maz@...nel.org>
Signed-off-by: Yang Guo <guoyang2@...wei.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@...ilicon.com>
---
 drivers/clocksource/arm_arch_timer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 9ab8221ee3c6..8122a1646925 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -44,8 +44,8 @@
 #define CNTACR_RWVT	BIT(4)
 #define CNTACR_RWPT	BIT(5)
 
-#define CNTVCT_LO	0x00
-#define CNTPCT_LO	0x08
+#define CNTPCT_LO	0x00
+#define CNTVCT_LO	0x08
 #define CNTFRQ		0x10
 #define CNTP_CVAL_LO	0x20
 #define CNTP_CTL	0x2c
-- 
2.33.0