linux-kernel - [PATCH 4.9 12/43] clocksource/drivers/arm_arch

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Date:   Wed,  6 Apr 2022 20:26:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ding Tianhong <dingtianhong@...wei.com>,
        Mark Rutland <mark.rutland@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        James Morse <james.morse@....com>
Subject: [PATCH 4.9 12/43] clocksource/drivers/arm_arch_timer: Remove fsl-a008585 parameter

From: Ding Tianhong <dingtianhong@...wei.com>

commit 5444ea6a7f46276876e94ecf8d44615af1ef22f7 upstream.

Having a command line option to flip the errata handling for a
particular erratum is a little bit unusual, and it's vastly superior to
pass this in the DT. By common consensus, it's best to kill off the
command line parameter.

Signed-off-by: Ding Tianhong <dingtianhong@...wei.com>
[Mark: split patch, reword commit message]
Signed-off-by: Mark Rutland <mark.rutland@....com>
Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: James Morse <james.morse@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 Documentation/kernel-parameters.txt  |    9 ---------
 drivers/clocksource/arm_arch_timer.c |   14 --------------
 2 files changed, 23 deletions(-)

--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -751,15 +751,6 @@ bytes respectively. Such letter suffixes
 			loops can be debugged more effectively on production
 			systems.
 
-	clocksource.arm_arch_timer.fsl-a008585=
-			[ARM64]
-			Format: <bool>
-			Enable/disable the workaround of Freescale/NXP
-			erratum A-008585.  This can be useful for KVM
-			guests, if the guest device tree doesn't show the
-			erratum.  If unspecified, the workaround is
-			enabled based on the device tree.
-
 	clearcpuid=BITNUM [X86]
 			Disable CPUID feature X for the kernel. See
 			arch/x86/include/asm/cpufeatures.h for the valid bit
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -101,20 +101,6 @@ EXPORT_SYMBOL_GPL(arch_timer_read_ool_en
 
 static int fsl_a008585_enable = -1;
 
-static int __init early_fsl_a008585_cfg(char *buf)
-{
-	int ret;
-	bool val;
-
-	ret = strtobool(buf, &val);
-	if (ret)
-		return ret;
-
-	fsl_a008585_enable = val;
-	return 0;
-}
-early_param("clocksource.arm_arch_timer.fsl-a008585", early_fsl_a008585_cfg);
-
 u32 __fsl_a008585_read_cntp_tval_el0(void)
 {
 	return __fsl_a008585_read_reg(cntp_tval_el0);