clocksource / ACPI: Add probing infrastructure for ACPI-based clocksources (c625f76a) · Commits · 戴 / test

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> Acked-by:

Thomas Gleixner <tglx@linutronix.de> Tested-by:

Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by:

Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/clocksource/clksrc-of.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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__);
		}

include/asm-generic/vmlinux.lds.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -525,6 +525,7 @@
		KERNEL_DTB() \
		IRQCHIP_OF_MATCH_TABLE() \
		ACPI_PROBE_TABLE(irqchip) \
		ACPI_PROBE_TABLE(clksrc) \
		EARLYCON_TABLE() \
		EARLYCON_OF_TABLES()

include/linux/clocksource.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 */

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