From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934118AbbI1Otv (ORCPT ); Mon, 28 Sep 2015 10:49:51 -0400 Received: from foss.arm.com ([217.140.101.70]:51176 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933972AbbI1Ots (ORCPT ); Mon, 28 Sep 2015 10:49:48 -0400 From: Marc Zyngier To: "Rafael J. Wysocki" , Len Brown , Hanjun Guo , Tomasz Nowicki , Thomas Gleixner , Jason Cooper , Lorenzo Pieralisi , Sudeep Holla , Will Deacon , Catalin Marinas , Daniel Lezcano 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 Message-Id: <1443451758-22717-5-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1443451758-22717-1-git-send-email-marc.zyngier@arm.com> References: <1443451758-22717-1-git-send-email-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 . */ +#include #include #include #include @@ -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