From: Marc Zyngier <marc.zyngier@arm.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>, Hanjun Guo <hanjun.guo@linaro.org>,
Tomasz Nowicki <tomasz.nowicki@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Sudeep Holla <sudeep.holla@arm.com>,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linaro-acpi@lists.linaro.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 4/7] clocksource/acpi: Add probing infrastructure for ACPI-based clocksources
Date: Mon, 28 Sep 2015 15:49:15 +0100 [thread overview]
Message-ID: <1443451758-22717-5-git-send-email-marc.zyngier@arm.com> (raw)
In-Reply-To: <1443451758-22717-1-git-send-email-marc.zyngier@arm.com>
DT enjoys a rather nice probing infrastructure for clocksources,
while ACPI is so far stuck into a very distant past.
This patch introduces a declarative API, allowing clocksources
to be self-contained and be called when parsing the GTDT table.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/clksrc-of.c | 4 ++++
include/asm-generic/vmlinux.lds.h | 1 +
include/linux/clocksource.h | 3 +++
3 files changed, 8 insertions(+)
diff --git a/drivers/clocksource/clksrc-of.c b/drivers/clocksource/clksrc-of.c
index 0093a8e..a2105bd 100644
--- a/drivers/clocksource/clksrc-of.c
+++ b/drivers/clocksource/clksrc-of.c
@@ -14,6 +14,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/clocksource.h>
@@ -38,6 +39,9 @@ void __init clocksource_of_init(void)
init_func(np);
clocksources++;
}
+
+ clocksources += acpi_probe_device_table(clksrc);
+
if (!clocksources)
pr_crit("%s: no matching clocksources found\n", __func__);
}
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index cd836cd..c4bd0e2 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -525,6 +525,7 @@
KERNEL_DTB() \
IRQCHIP_OF_MATCH_TABLE() \
ACPI_PROBE_TABLE(irqchip) \
+ ACPI_PROBE_TABLE(clksrc) \
EARLYCON_TABLE() \
EARLYCON_OF_TABLES()
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 278dd27..8cde048 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -258,4 +258,7 @@ void acpi_generic_timer_init(void);
static inline void acpi_generic_timer_init(void) { }
#endif
+#define CLOCKSOURCE_ACPI_DECLARE(name, table_id, fn) \
+ ACPI_DECLARE_PROBE_ENTRY(clksrc, name, table_id, 0, NULL, 0, fn)
+
#endif /* _LINUX_CLOCKSOURCE_H */
--
2.1.4
next prev parent reply other threads:[~2015-09-28 14:49 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-28 14:49 [PATCH v3 0/7] Early ACPI probing infrastructure Marc Zyngier
2015-09-28 14:49 ` [PATCH v3 1/7] acpi: Add early device " Marc Zyngier
2015-09-29 4:30 ` Daniel Lezcano
2015-09-29 7:29 ` Marc Zyngier
2015-09-29 12:17 ` Daniel Lezcano
2015-09-29 11:05 ` Lorenzo Pieralisi
2015-09-29 14:41 ` Hanjun Guo
2015-10-02 21:06 ` Wei Huang
2015-10-03 10:04 ` Marc Zyngier
2015-10-05 17:07 ` Wei Huang
2015-09-28 14:49 ` [PATCH v3 2/7] irqchip/acpi: Add probing infrastructure for ACPI-based irqchips Marc Zyngier
2015-09-29 10:19 ` Catalin Marinas
2015-09-29 14:42 ` Hanjun Guo
2015-09-28 14:49 ` [PATCH v3 3/7] irqchip/gic: Convert the GIC driver to ACPI probing Marc Zyngier
2015-09-29 10:20 ` Catalin Marinas
2015-09-29 15:01 ` Hanjun Guo
2015-09-28 14:49 ` Marc Zyngier [this message]
2015-09-28 14:49 ` [PATCH v3 5/7] clocksource: Add new CLKSRC_{PROBE,ACPI} config symbols Marc Zyngier
2015-09-28 14:49 ` [PATCH v3 6/7] clocksource/arm_arch_timer: Convert to ACPI probing Marc Zyngier
2015-09-29 10:26 ` Catalin Marinas
2015-09-28 14:49 ` [PATCH v3 7/7] clocksource: cosmetic: Drop OF 'dependency' from symbols Marc Zyngier
2015-09-29 10:27 ` Catalin Marinas
2015-09-29 15:14 ` Hanjun Guo
2015-09-28 22:46 ` [PATCH v3 0/7] Early ACPI probing infrastructure Rafael J. Wysocki
2015-09-30 10:44 ` Thomas Gleixner
2015-10-05 13:37 ` Rafael J. Wysocki
2015-09-29 15:25 ` Hanjun Guo
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