From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexander Dahl <ada@thorsis.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@bootlin.com>
Subject: [PATCH v2 4/9] ARM: at91: Implement clocksource selection
Date: Mon, 15 Apr 2019 17:08:51 +0200 [thread overview]
Message-ID: <20190415150856.9384-5-alexandre.belloni@bootlin.com> (raw)
In-Reply-To: <20190415150856.9384-1-alexandre.belloni@bootlin.com>
Allow selecting and unselecting the PIT clocksource driver so it doesn't
have to be compiled when unused.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
arch/arm/mach-at91/Kconfig | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 903f23c309df..da1d97a06c53 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -107,6 +107,29 @@ config SOC_AT91SAM9
AT91SAM9X35
AT91SAM9XE
+comment "Clocksource driver selection"
+
+config ATMEL_CLOCKSOURCE_PIT
+ bool "Periodic Interval Timer (PIT) support"
+ depends on SOC_AT91SAM9 || SOC_SAMA5
+ default SOC_AT91SAM9 || SOC_SAMA5
+ select ATMEL_PIT
+ help
+ Select this to get a clocksource based on the Atmel Periodic Interval
+ Timer. It has a relatively low resolution and the TC Block clocksource
+ should be preferred.
+
+config ATMEL_CLOCKSOURCE_TCB
+ bool "Timer Counter Blocks (TCB) support"
+ default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAMA5
+ select ATMEL_TCB_CLKSRC
+ help
+ Select this to get a high precision clocksource based on a
+ TC block with a 5+ MHz base clock rate.
+ On platforms with 16-bit counters, two timer channels are combined
+ to make a single 32-bit timer.
+ It can also be used as a clock event device supporting oneshot mode.
+
config HAVE_AT91_UTMI
bool
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>,
Alexander Dahl <ada@thorsis.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 4/9] ARM: at91: Implement clocksource selection
Date: Mon, 15 Apr 2019 17:08:51 +0200 [thread overview]
Message-ID: <20190415150856.9384-5-alexandre.belloni@bootlin.com> (raw)
In-Reply-To: <20190415150856.9384-1-alexandre.belloni@bootlin.com>
Allow selecting and unselecting the PIT clocksource driver so it doesn't
have to be compiled when unused.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
arch/arm/mach-at91/Kconfig | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 903f23c309df..da1d97a06c53 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -107,6 +107,29 @@ config SOC_AT91SAM9
AT91SAM9X35
AT91SAM9XE
+comment "Clocksource driver selection"
+
+config ATMEL_CLOCKSOURCE_PIT
+ bool "Periodic Interval Timer (PIT) support"
+ depends on SOC_AT91SAM9 || SOC_SAMA5
+ default SOC_AT91SAM9 || SOC_SAMA5
+ select ATMEL_PIT
+ help
+ Select this to get a clocksource based on the Atmel Periodic Interval
+ Timer. It has a relatively low resolution and the TC Block clocksource
+ should be preferred.
+
+config ATMEL_CLOCKSOURCE_TCB
+ bool "Timer Counter Blocks (TCB) support"
+ default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAMA5
+ select ATMEL_TCB_CLKSRC
+ help
+ Select this to get a high precision clocksource based on a
+ TC block with a 5+ MHz base clock rate.
+ On platforms with 16-bit counters, two timer channels are combined
+ to make a single 32-bit timer.
+ It can also be used as a clock event device supporting oneshot mode.
+
config HAVE_AT91_UTMI
bool
--
2.20.1
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next prev parent reply other threads:[~2019-04-15 15:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-15 15:08 [PATCH v2 0/9] clocksource: improve Atmel TCB timer driver Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-15 15:08 ` [PATCH v2 1/9] ARM: at91: move SoC specific definitions to SoC folder Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-15 15:08 ` [PATCH v2 2/9] clocksource/drivers/tcb_clksrc: stop depending on atmel_tclib Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-15 15:08 ` [PATCH v2 3/9] clocksource/drivers/tcb_clksrc: Use tcb as sched_clock Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni [this message]
2019-04-15 15:08 ` [PATCH v2 4/9] ARM: at91: Implement clocksource selection Alexandre Belloni
2019-04-15 15:08 ` [PATCH v2 5/9] clocksource/drivers/tcb_clksrc: move Kconfig option Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-16 13:55 ` Daniel Lezcano
2019-04-16 13:55 ` Daniel Lezcano
2019-04-15 15:08 ` [PATCH v2 6/9] clocksource/drivers/timer-atmel-pit: rework " Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-15 15:08 ` [PATCH v2 7/9] clocksource/drivers/tcb_clksrc: Rename the file for consistency Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-15 15:08 ` [PATCH v2 8/9] clocksource/drivers/timer-atmel-tcb: tc_clksrc_suspend() can be static Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-15 15:08 ` [PATCH v2 9/9] misc: atmel_tclib: do not probe already used TCBs Alexandre Belloni
2019-04-15 15:08 ` Alexandre Belloni
2019-04-17 11:50 ` Romain Izard
2019-04-17 11:50 ` Romain Izard
2019-04-17 12:00 ` Alexandre Belloni
2019-04-17 12:00 ` Alexandre Belloni
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