59 lines
2.2 KiB
Diff
59 lines
2.2 KiB
Diff
From f2388033261d286dab250792486ac6d35ef4debd Mon Sep 17 00:00:00 2001
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Message-Id: <f2388033261d286dab250792486ac6d35ef4debd.1601675151.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Date: Thu, 13 Sep 2018 13:30:22 +0200
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Subject: [PATCH 005/333] ARM: at91: Implement clocksource selection
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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Allow selecting and unselecting the PIT clocksource driver so it doesn't
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have to be compile when unused.
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Tested-by: Alexander Dahl <ada@thorsis.com>
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Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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arch/arm/mach-at91/Kconfig | 25 +++++++++++++++++++++++++
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1 file changed, 25 insertions(+)
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diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
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index 903f23c309df..fa493a86e2bb 100644
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--- a/arch/arm/mach-at91/Kconfig
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+++ b/arch/arm/mach-at91/Kconfig
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@@ -107,6 +107,31 @@ config SOC_AT91SAM9
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AT91SAM9X35
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AT91SAM9XE
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+comment "Clocksource driver selection"
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+
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+config ATMEL_CLOCKSOURCE_PIT
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+ bool "Periodic Interval Timer (PIT) support"
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+ depends on SOC_AT91SAM9 || SOC_SAMA5
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+ default SOC_AT91SAM9 || SOC_SAMA5
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+ select ATMEL_PIT
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+ help
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+ Select this to get a clocksource based on the Atmel Periodic Interval
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+ Timer. It has a relatively low resolution and the TC Block clocksource
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+ should be preferred.
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+
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+config ATMEL_CLOCKSOURCE_TCB
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+ bool "Timer Counter Blocks (TCB) support"
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+ depends on SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAMA5 || COMPILE_TEST
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+ default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAMA5
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+ depends on !ATMEL_TCLIB
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+ select ATMEL_ARM_TCB_CLKSRC
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+ help
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+ Select this to get a high precision clocksource based on a
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+ TC block with a 5+ MHz base clock rate.
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+ On platforms with 16-bit counters, two timer channels are combined
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+ to make a single 32-bit timer.
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+ It can also be used as a clock event device supporting oneshot mode.
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+
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config HAVE_AT91_UTMI
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bool
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--
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2.17.1
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