From: Andrea Merello <andrea.merello@gmail.com>
To: tglx@linutronix.de, daniel.lezcano@linaro.org
Cc: "Andrea Merello" <andrea.merello@gmail.com>,
linux-kernel@vger.kernel.org,
"Michal Simek" <michal.simek@xilinx.com>,
"Patrice Chotard" <patrice.chotard@st.com>,
linux-arm-kernel@lists.infradead.org,
"Sören Brinkmann" <soren.brinkmann@xilinx.com>
Subject: [PATCH 2/2] arm: zynq: don't disable CONFIG_ARM_GLOBAL_TIMER due to CONFIG_CPU_FREQ anymore
Date: Wed, 17 Feb 2021 12:07:09 +0100 [thread overview]
Message-ID: <20210217110709.17250-3-andrea.merello@gmail.com> (raw)
In-Reply-To: <20210217110709.17250-1-andrea.merello@gmail.com>
Now ARM global timer driver could work even if it's source clock rate
changes, so we don't need to disable that driver when cpu frequency scaling
is in use.
This cause Zynq arch to get support for timer delay and get_cycles().
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
---
arch/arm/mach-zynq/Kconfig | 2 +-
drivers/clocksource/Kconfig | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index 43fb941dcd07..a56748d671c4 100644
--- a/arch/arm/mach-zynq/Kconfig
+++ b/arch/arm/mach-zynq/Kconfig
@@ -6,7 +6,7 @@ config ARCH_ZYNQ
select ARCH_SUPPORTS_BIG_ENDIAN
select ARM_AMBA
select ARM_GIC
- select ARM_GLOBAL_TIMER if !CPU_FREQ
+ select ARM_GLOBAL_TIMER
select CADENCE_TTC_TIMER
select HAVE_ARM_SCU if SMP
select HAVE_ARM_TWD if SMP
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 0f1c625275a0..421cd763bdb2 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -387,6 +387,7 @@ config ARM_GLOBAL_TIMER
config ARM_GT_INITIAL_PRESCALER_VAL
int "ARM global timer initial prescaler value"
+ default 2 if ARCH_ZYNQ
default 1
depends on ARM_GLOBAL_TIMER
help
--
2.17.1
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prev parent reply other threads:[~2021-02-17 11:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-17 11:07 [PATCH 0/2] Fix missing entropy on Zynq arch due to get_cycles() not supported Andrea Merello
2021-02-17 11:07 ` [PATCH 1/2] clocksource: arm_global_timer: implement rate compensation whenever source clock changes Andrea Merello
2021-02-17 11:07 ` Andrea Merello [this message]
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