From patchwork Mon Nov 19 18:31:00 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Warren X-Patchwork-Id: 1768441 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 88A56DF264 for ; Mon, 19 Nov 2012 19:27:07 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TaWsz-0005Th-HQ; Mon, 19 Nov 2012 19:20:03 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TaWMV-00037M-2x for linux-arm-kernel@merlin.infradead.org; Mon, 19 Nov 2012 18:46:28 +0000 Received: from avon.wwwdotorg.org ([2001:470:1f0f:bd7::2]) by casper.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TaW81-0008Sw-Ou for linux-arm-kernel@lists.infradead.org; Mon, 19 Nov 2012 18:31:32 +0000 Received: from severn.wwwdotorg.org (unknown [192.168.65.5]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by avon.wwwdotorg.org (Postfix) with ESMTPS id C76779E9B7; Mon, 19 Nov 2012 11:32:55 -0700 (MST) Received: from swarren-lx1.nvidia.com (localhost [127.0.0.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by severn.wwwdotorg.org (Postfix) with ESMTPSA id 43CFFE47A4; Mon, 19 Nov 2012 11:31:24 -0700 (MST) From: Stephen Warren To: Russell King Subject: [PATCH V3 04/11] ARM: set arch_gettimeoffset directly Date: Mon, 19 Nov 2012 11:31:00 -0700 Message-Id: <1353349867-28494-5-git-send-email-swarren@wwwdotorg.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1353349867-28494-1-git-send-email-swarren@wwwdotorg.org> References: <1353349867-28494-1-git-send-email-swarren@wwwdotorg.org> X-NVConfidentiality: public X-Virus-Scanned: clamav-milter 0.96.5 at avon.wwwdotorg.org X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20121119_183130_308350_6267C549 X-CRM114-Status: GOOD ( 24.71 ) X-Spam-Score: 0.5 (/) X-Spam-Report: SpamAssassin version 3.3.2 on casper.infradead.org summary: Content analysis details: (0.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 3.0 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list -0.0 SPF_PASS SPF: sender matches SPF record -0.6 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: linux-arch@vger.kernel.org, Kukjin Kim , Stephen Warren , Ryan Mallon , Arnd Bergmann , John Stultz , Nicolas Ferre , linux-kernel@vger.kernel.org, Hartley Sweeten , Ben Dooks , Olof Johansson , Thomas Gleixner , Jean-Christophe Plagniol-Villard , Andrew Victor , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Stephen Warren remove ARM's struct sys_timer .offset function pointer, and instead directly set the arch_gettimeoffset function pointer when the timer driver is initialized. This requires multiplying all function results by 1000, since the removed arm_gettimeoffset() did this. Also, s/unsigned long/u32/ just to make the function prototypes exactly match that of arch_gettimeoffset. Cc: Russell King Cc: Andrew Victor Cc: Nicolas Ferre Cc: Jean-Christophe Plagniol-Villard Cc: Hartley Sweeten Cc: Ryan Mallon Cc: Ben Dooks Cc: Kukjin Kim Signed-off-by: Stephen Warren --- v2: Fix comment in ep93xx_gettimeoffset. --- arch/arm/include/asm/mach/time.h | 3 --- arch/arm/kernel/time.c | 14 -------------- arch/arm/mach-at91/at91x40_time.c | 8 +++++--- arch/arm/mach-ebsa110/core.c | 7 ++++--- arch/arm/mach-ep93xx/core.c | 29 ++++++++++++++++++----------- arch/arm/mach-h720x/common.c | 6 +++--- arch/arm/mach-h720x/common.h | 2 +- arch/arm/mach-h720x/cpu-h7201.c | 3 ++- arch/arm/mach-h720x/cpu-h7202.c | 3 ++- arch/arm/mach-rpc/time.c | 6 +++--- arch/arm/plat-samsung/time.c | 7 ++++--- 11 files changed, 42 insertions(+), 46 deletions(-) diff --git a/arch/arm/include/asm/mach/time.h b/arch/arm/include/asm/mach/time.h index 6ca945f..cac8d9c 100644 --- a/arch/arm/include/asm/mach/time.h +++ b/arch/arm/include/asm/mach/time.h @@ -35,9 +35,6 @@ struct sys_timer { void (*init)(void); void (*suspend)(void); void (*resume)(void); -#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET - unsigned long (*offset)(void); -#endif }; extern void timer_tick(void); diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c index b0190b4..ea36bfa 100644 --- a/arch/arm/kernel/time.c +++ b/arch/arm/kernel/time.c @@ -69,16 +69,6 @@ unsigned long profile_pc(struct pt_regs *regs) EXPORT_SYMBOL(profile_pc); #endif -#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET -static u32 arm_gettimeoffset(void) -{ - if (system_timer->offset != NULL) - return system_timer->offset() * 1000; - - return 0; -} -#endif /* CONFIG_ARCH_USES_GETTIMEOFFSET */ - #ifndef CONFIG_GENERIC_CLOCKEVENTS /* * Kernel system timer support. @@ -164,10 +154,6 @@ device_initcall(timer_init_syscore_ops); void __init time_init(void) { -#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET - arch_gettimeoffset = arm_gettimeoffset; -#endif - system_timer = machine_desc->timer; system_timer->init(); sched_clock_postinit(); diff --git a/arch/arm/mach-at91/at91x40_time.c b/arch/arm/mach-at91/at91x40_time.c index 0e57e44..fb3c701 100644 --- a/arch/arm/mach-at91/at91x40_time.c +++ b/arch/arm/mach-at91/at91x40_time.c @@ -42,9 +42,10 @@ #define AT91_TC_CLK1BASE 0x40 #define AT91_TC_CLK2BASE 0x80 -static unsigned long at91x40_gettimeoffset(void) +static u32 at91x40_gettimeoffset(void) { - return (at91_tc_read(AT91_TC_CLK1BASE + AT91_TC_CV) * 1000000 / (AT91X40_MASTER_CLOCK / 128)); + return (at91_tc_read(AT91_TC_CLK1BASE + AT91_TC_CV) * 1000000 / + (AT91X40_MASTER_CLOCK / 128)) * 1000; } static irqreturn_t at91x40_timer_interrupt(int irq, void *dev_id) @@ -64,6 +65,8 @@ void __init at91x40_timer_init(void) { unsigned int v; + arch_gettimeoffset = at91x40_gettimeoffset; + at91_tc_write(AT91_TC_BCR, 0); v = at91_tc_read(AT91_TC_BMR); v = (v & ~AT91_TC_TC1XC1S) | AT91_TC_TC1XC1S_NONE; @@ -82,6 +85,5 @@ void __init at91x40_timer_init(void) struct sys_timer at91x40_timer = { .init = at91x40_timer_init, - .offset = at91x40_gettimeoffset, }; diff --git a/arch/arm/mach-ebsa110/core.c b/arch/arm/mach-ebsa110/core.c index f0fe6b5..d96dd94 100644 --- a/arch/arm/mach-ebsa110/core.c +++ b/arch/arm/mach-ebsa110/core.c @@ -158,7 +158,7 @@ static void __init ebsa110_init_early(void) * interrupt, then the PIT counter will roll over (ie, be negative). * This actually works out to be convenient. */ -static unsigned long ebsa110_gettimeoffset(void) +static u32 ebsa110_gettimeoffset(void) { unsigned long offset, count; @@ -181,7 +181,7 @@ static unsigned long ebsa110_gettimeoffset(void) */ offset = offset * (1000000 / HZ) / COUNT; - return offset; + return offset * 1000; } static irqreturn_t @@ -215,6 +215,8 @@ static struct irqaction ebsa110_timer_irq = { */ static void __init ebsa110_timer_init(void) { + arch_gettimeoffset = ebsa110_gettimeoffset; + /* * Timer 1, mode 2, LSB/MSB */ @@ -227,7 +229,6 @@ static void __init ebsa110_timer_init(void) static struct sys_timer ebsa110_timer = { .init = ebsa110_timer_init, - .offset = ebsa110_gettimeoffset, }; static struct plat_serial8250_port serial_platform_data[] = { diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index e85bf17..6f48b87 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -140,11 +140,29 @@ static struct irqaction ep93xx_timer_irq = { .handler = ep93xx_timer_interrupt, }; +static u32 ep93xx_gettimeoffset(void) +{ + int offset; + + offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time; + + /* + * Timer 4 is based on a 983.04 kHz reference clock, + * so dividing by 983040 gives the fraction of a second, + * so dividing by 0.983040 converts to uS. + * Refactor the calculation to avoid overflow. + * Finally, multiply by 1000 to give nS. + */ + return (offset + (53 * offset / 3072)) * 1000; +} + static void __init ep93xx_timer_init(void) { u32 tmode = EP93XX_TIMER123_CONTROL_MODE | EP93XX_TIMER123_CONTROL_CLKSEL; + arch_gettimeoffset = ep93xx_gettimeoffset; + /* Enable periodic HZ timer. */ __raw_writel(tmode, EP93XX_TIMER1_CONTROL); __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD); @@ -158,19 +176,8 @@ static void __init ep93xx_timer_init(void) setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq); } -static unsigned long ep93xx_gettimeoffset(void) -{ - int offset; - - offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time; - - /* Calculate (1000000 / 983040) * offset. */ - return offset + (53 * offset / 3072); -} - struct sys_timer ep93xx_timer = { .init = ep93xx_timer_init, - .offset = ep93xx_gettimeoffset, }; diff --git a/arch/arm/mach-h720x/common.c b/arch/arm/mach-h720x/common.c index aa1331e..17ef91f 100644 --- a/arch/arm/mach-h720x/common.c +++ b/arch/arm/mach-h720x/common.c @@ -42,12 +42,12 @@ void __init arch_dma_init(dma_t *dma) } /* - * Return usecs since last timer reload + * Return nsecs since last timer reload * (timercount * (usecs perjiffie)) / (ticks per jiffie) */ -unsigned long h720x_gettimeoffset(void) +u32 h720x_gettimeoffset(void) { - return (CPU_REG (TIMER_VIRT, TM0_COUNT) * tick_usec) / LATCH; + return ((CPU_REG(TIMER_VIRT, TM0_COUNT) * tick_usec) / LATCH) * 1000; } /* diff --git a/arch/arm/mach-h720x/common.h b/arch/arm/mach-h720x/common.h index 2489537..79cfb97 100644 --- a/arch/arm/mach-h720x/common.h +++ b/arch/arm/mach-h720x/common.h @@ -13,7 +13,7 @@ * */ -extern unsigned long h720x_gettimeoffset(void); +extern u32 h720x_gettimeoffset(void); extern void __init h720x_init_irq(void); extern void __init h720x_map_io(void); extern void h720x_restart(char, const char *); diff --git a/arch/arm/mach-h720x/cpu-h7201.c b/arch/arm/mach-h720x/cpu-h7201.c index 24df2a3..ba349cf 100644 --- a/arch/arm/mach-h720x/cpu-h7201.c +++ b/arch/arm/mach-h720x/cpu-h7201.c @@ -46,6 +46,8 @@ static struct irqaction h7201_timer_irq = { */ void __init h7201_init_time(void) { + arch_gettimeoffset = h720x_gettimeoffset; + CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH; CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET; CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START; @@ -56,5 +58,4 @@ void __init h7201_init_time(void) struct sys_timer h7201_timer = { .init = h7201_init_time, - .offset = h720x_gettimeoffset, }; diff --git a/arch/arm/mach-h720x/cpu-h7202.c b/arch/arm/mach-h720x/cpu-h7202.c index c37d570..fb9ca76 100644 --- a/arch/arm/mach-h720x/cpu-h7202.c +++ b/arch/arm/mach-h720x/cpu-h7202.c @@ -180,6 +180,8 @@ static struct irqaction h7202_timer_irq = { */ void __init h7202_init_time(void) { + arch_gettimeoffset = h720x_gettimeoffset; + CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH; CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET; CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START; @@ -190,7 +192,6 @@ void __init h7202_init_time(void) struct sys_timer h7202_timer = { .init = h7202_init_time, - .offset = h720x_gettimeoffset, }; void __init h7202_init_irq (void) diff --git a/arch/arm/mach-rpc/time.c b/arch/arm/mach-rpc/time.c index 581fca9..6ddccb0 100644 --- a/arch/arm/mach-rpc/time.c +++ b/arch/arm/mach-rpc/time.c @@ -24,7 +24,7 @@ #include -unsigned long ioc_timer_gettimeoffset(void) +static u32 ioc_timer_gettimeoffset(void) { unsigned int count1, count2, status; long offset; @@ -56,7 +56,7 @@ unsigned long ioc_timer_gettimeoffset(void) } offset = (LATCH - offset) * (tick_nsec / 1000); - return (offset + LATCH/2) / LATCH; + return ((offset + LATCH/2) / LATCH) * 1000; } void __init ioctime_init(void) @@ -84,12 +84,12 @@ static struct irqaction ioc_timer_irq = { */ static void __init ioc_timer_init(void) { + arch_gettimeoffset = ioc_timer_gettimeoffset; ioctime_init(); setup_irq(IRQ_TIMER0, &ioc_timer_irq); } struct sys_timer ioc_timer = { .init = ioc_timer_init, - .offset = ioc_timer_gettimeoffset, }; diff --git a/arch/arm/plat-samsung/time.c b/arch/arm/plat-samsung/time.c index 60552e2..67206df 100644 --- a/arch/arm/plat-samsung/time.c +++ b/arch/arm/plat-samsung/time.c @@ -95,7 +95,7 @@ static inline unsigned long timer_ticks_to_usec(unsigned long ticks) * IRQs are disabled before entering here from do_gettimeofday() */ -static unsigned long s3c2410_gettimeoffset (void) +static u32 s3c2410_gettimeoffset(void) { unsigned long tdone; unsigned long tval; @@ -120,7 +120,7 @@ static unsigned long s3c2410_gettimeoffset (void) tdone += timer_startval; } - return timer_ticks_to_usec(tdone); + return timer_ticks_to_usec(tdone) * 1000; } @@ -273,6 +273,8 @@ static void __init s3c2410_timer_resources(void) static void __init s3c2410_timer_init(void) { + arch_gettimeoffset = s3c2410_gettimeoffset; + s3c2410_timer_resources(); s3c2410_timer_setup(); setup_irq(IRQ_TIMER4, &s3c2410_timer_irq); @@ -280,6 +282,5 @@ static void __init s3c2410_timer_init(void) struct sys_timer s3c24xx_timer = { .init = s3c2410_timer_init, - .offset = s3c2410_gettimeoffset, .resume = s3c2410_timer_setup };