From mboxrd@z Thu Jan 1 00:00:00 1970 From: robherring2@gmail.com (Rob Herring) Date: Sat, 2 Oct 2010 09:34:46 -0500 Subject: [PATCH v2 3/3] ARM: twd_smp: add clock api support In-Reply-To: <1286030086-25556-1-git-send-email-robherring2@gmail.com> References: <1286030086-25556-1-git-send-email-robherring2@gmail.com> Message-ID: <1286030086-25556-4-git-send-email-robherring2@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Rob Herring The private timer freq is currently dynamically detected using jiffies count to determine the rate. This method adds a delay to boot-up, so use the clock api instead to get the clock rate. Signed-off-by: Rob Herring --- arch/arm/include/asm/smp_twd.h | 1 + arch/arm/kernel/smp_twd.c | 11 +++++++++++ 2 files changed, 12 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/smp_twd.h b/arch/arm/include/asm/smp_twd.h index 634f357..99383d5 100644 --- a/arch/arm/include/asm/smp_twd.h +++ b/arch/arm/include/asm/smp_twd.h @@ -25,5 +25,6 @@ extern void __iomem *twd_base; void twd_timer_stop(void); int twd_timer_ack(void); void twd_timer_setup(struct clock_event_device *); +void twd_timer_init(void __iomem *base); #endif diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c index 35882fb..be0983c 100644 --- a/arch/arm/kernel/smp_twd.c +++ b/arch/arm/kernel/smp_twd.c @@ -8,6 +8,8 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ +#include +#include #include #include #include @@ -151,6 +153,15 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk) clockevents_register_device(clk); } +void __init twd_timer_init(void __iomem *base) +{ + struct clk *clk = clk_get_sys("smp_twd", NULL); + if (!IS_ERR(clk)) + twd_timer_rate = clk_get_rate(clk); + + twd_base = base; +} + #ifdef CONFIG_HOTPLUG_CPU /* * take a local timer down -- 1.7.0.4