Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S937210Ab3DIJrg (ORCPT ); Tue, 9 Apr 2013 05:47:36 -0400 Received: from mailout2.samsung.com ([203.254.224.25]:9225 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933110Ab3DIJrd (ORCPT ); Tue, 9 Apr 2013 05:47:33 -0400 X-AuditID: cbfee691-b7f5f6d000002fda-f2-5163e3b30272 From: Vivek Gautam To: rtc-linux@googlegroups.com, linux-kernel@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org, a.zummo@towertech.it, kgene.kim@samsung.com, dianders@chromium.org Subject: [PATCH RFC] rtc: rtc-s3c: use clk_prepare_enable and clk_disable_unprepare Date: Tue, 09 Apr 2013 15:15:44 +0530 Message-id: <1365500744-14839-1-git-send-email-gautam.vivek@samsung.com> X-Mailer: git-send-email 1.7.6.5 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrGLMWRmVeSWpSXmKPExsWyRsSkTnfz4+RAg8PL5C2WXLzKbnF22UE2 i94FV9ksLu+aw2Yx4/w+Jov9nR2MDmwesxsusnjsmXiSzaNvyypGj+nzfjJ5fN4kF8AaxWWT kpqTWZZapG+XwJXR86WVuWBiRMX8FV2MDYxfPbsYOTkkBEwk7m84ygRhi0lcuLeeDcQWEljK KNFw06SLkQOsZtMjni5GLqDwdEaJP7M+MkE4U5gk/jz7xQLSwCagK9H0dhcjiC0iYCOxclY/ K4jNLJAtsXZTM9gCYYFQiZUth9hAhrIIqErcOi8AYvIKeEgceaQEcYKCxJvbz5hBxksI/GeT OPq2G+weFgEBiW+TD7FA3CMrsekAM0S9pMTBFTdYJjAKLmBkWMUomlqQXFCclF5kqlecmFtc mpeul5yfu4kRGKan/z2buIPx/gHrQ4zJQOMmMkuJJucDwzyvJN7Q2MzIwtTE1NjI3NKMNGEl cV71FutAIYH0xJLU7NTUgtSi+KLSnNTiQ4xMHJxSDYwm53IETmxROBxaVpzie7pdSOL5vrvL 5MRnz+ZmZO9P5Uw++T3sPd/mDUbZIhNCNv6WaOF5lO389WWPh/TaZ2pZrOzq6U1r+W4eSolP tL3g4Br7c3HYdekkhYNcS7TWsx8rs9759+XmqzIrL6+RuDk7iKlhj9K0LXJMunrfGVjadtut Mwy+pKLEUpyRaKjFXFScCADimfjxaQIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrCIsWRmVeSWpSXmKPExsVy+t9jQd3Nj5MDDX5cErVYcvEqu8XZZQfZ LHoXXGWzuLxrDpvFjPP7mCz2d3YwOrB5zG64yOKxZ+JJNo++LasYPabP+8nk8XmTXABrVAOj TUZqYkpqkUJqXnJ+SmZeuq2Sd3C8c7ypmYGhrqGlhbmSQl5ibqqtkotPgK5bZg7QCUoKZYk5 pUChgMTiYiV9O0wTQkPcdC1gGiN0fUOC4HqMDNBAwhrGjJ4vrcwFEyMq5q/oYmxg/OrZxcjB ISFgIrHpEU8XIyeQKSZx4d56ti5GLg4hgemMEn9mfWSCcKYwSfx59osFpIpNQFei6e0uRhBb RMBGYuWsflYQm1kgW2LtpmYmEFtYIFRiZcshNpAFLAKqErfOC4CYvAIeEkceKUHsUpB4c/sZ 8wRG7gWMDKsYRVMLkguKk9JzjfSKE3OLS/PS9ZLzczcxguPgmfQOxlUNFocYBTgYlXh4LzxJ ChRiTSwrrsw9xCjBwawkwttyJzlQiDclsbIqtSg/vqg0J7X4EGMy0O6JzFKiyfnAGM0riTc0 NjE3NTa1NLEwMbMkTVhJnPdgq3WgkEB6YklqdmpqQWoRzBYmDk6pBka9D+cyyo6tmlzgVZHr PlOJo9LvOffy4vD5oRoZYY1ejCW9j6wi6l+LHTT9u1Dl7b/+O5tcuQ4+9Hs3Q/NMV+MVpdZT N9zr7lufXS19ZqPC2YBPC9tvz7yltKlQ5gCX2n+R3CVHXDJjv1RFCtrwrNtx89+W9EO35Q80 psrOOdt4o+SUxNPNGWuVWIozEg21mIuKEwH+gju6xwIAAA== DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 11215 Lines: 316 Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare calls as required by common clock framework, to get rid of WARN_ON on prepare_count. Signed-off-by: Vivek Gautam --- This fixes the warnings in the boot log coming out of enabling the common clock framework in exynos platform. However, on doing system suspend/resume using rtc wake mechanism we still get following warning dump for the first time we suspend using commands: echo +10 > /sys/class/rtc/rtc0/wakealarm echo mem > /sys/power/state [ 12.530000] ------------[ cut here ]------------ [ 12.530000] WARNING: at kernel/mutex.c:199 __mutex_lock_slowpath+0x2c0/0x340() [ 12.530000] Modules linked in: [ 12.530000] [<80014c60>] (unwind_backtrace+0x0/0xf8) from [<8001ebd0>] (warn_slowpath_common+0x54/0x68) [ 12.530000] [<8001ebd0>] (warn_slowpath_common+0x54/0x68) from [<8001ec00>] (warn_slowpath_null+0x1c/0x24) [ 12.530000] [<8001ec00>] (warn_slowpath_null+0x1c/0x24) from [<8033f548>] (__mutex_lock_slowpath+0x2c0/0x340) [ 12.530000] [<8033f548>] (__mutex_lock_slowpath+0x2c0/0x340) from [<8033f5d4>] (mutex_lock+0xc/0x24) [ 12.530000] [<8033f5d4>] (mutex_lock+0xc/0x24) from [<80299e18>] (clk_prepare+0x18/0x34) [ 12.530000] [<80299e18>] (clk_prepare+0x18/0x34) from [<802862d8>] (s3c_rtc_alarmirq+0x1c/0x98) [ 12.530000] [<802862d8>] (s3c_rtc_alarmirq+0x1c/0x98) from [<8006ad78>] (handle_irq_event_percpu+0x54/0x194) [ 12.530000] [<8006ad78>] (handle_irq_event_percpu+0x54/0x194) from [<8006aef4>] (handle_irq_event+0x3c/0x5c) [ 12.530000] [<8006aef4>] (handle_irq_event+0x3c/0x5c) from [<8006db00>] (handle_fasteoi_irq+0xa4/0x134) [ 12.530000] [<8006db00>] (handle_fasteoi_irq+0xa4/0x134) from [<8006a594>] (generic_handle_irq+0x30/0x40) [ 12.530000] [<8006a594>] (generic_handle_irq+0x30/0x40) from [<8000f4fc>] (handle_IRQ+0x40/0x90) [ 12.530000] [<8000f4fc>] (handle_IRQ+0x40/0x90) from [<80008544>] (gic_handle_irq+0x38/0x68) [ 12.530000] [<80008544>] (gic_handle_irq+0x38/0x68) from [<8000e200>] (__irq_svc+0x40/0x70) [ 12.530000] Exception stack(0x8182be60 to 0x8182bea8) [ 12.530000] be60: 00000000 00000000 0000000c ffffffff 60000013 8049fc50 00000000 80479a10 [ 12.530000] be80: 60000013 ee97de98 804799c0 00000001 0000000d 8182bea8 803412dc 803412e0 [ 12.530000] bea0: 60000013 ffffffff [ 12.530000] [<8000e200>] (__irq_svc+0x40/0x70) from [<803412e0>] (_raw_spin_unlock_irqrestore+0x10/0x38) [ 12.530000] [<803412e0>] (_raw_spin_unlock_irqrestore+0x10/0x38) from [<80070bc4>] (resume_irqs+0x9c/0xb8) [ 12.530000] [<80070bc4>] (resume_irqs+0x9c/0xb8) from [<8021d528>] (dpm_resume_start+0xc/0x18) [ 12.530000] [<8021d528>] (dpm_resume_start+0xc/0x18) from [<800544ac>] (suspend_devices_and_enter+0x118/0x2e4) [ 12.530000] [<800544ac>] (suspend_devices_and_enter+0x118/0x2e4) from [<80054814>] (pm_suspend+0x19c/0x214) [ 12.530000] [<80054814>] (pm_suspend+0x19c/0x214) from [<80053a58>] (state_store+0x120/0x12c) [ 12.530000] [<80053a58>] (state_store+0x120/0x12c) from [<801ae9d8>] (kobj_attr_store+0x14/0x20) [ 12.530000] [<801ae9d8>] (kobj_attr_store+0x14/0x20) from [<801092c8>] (sysfs_write_file+0xfc/0x17c) [ 12.530000] [<801092c8>] (sysfs_write_file+0xfc/0x17c) from [<800b0d84>] (vfs_write+0xa8/0x138) [ 12.530000] [<800b0d84>] (vfs_write+0xa8/0x138) from [<800b10e4>] (sys_write+0x40/0x68) [ 12.530000] [<800b10e4>] (sys_write+0x40/0x68) from [<8000e600>] (ret_fast_syscall+0x0/0x30) [ 12.530000] ---[ end trace 8643216fba2e8cb5 ]--- drivers/rtc/rtc-s3c.c | 58 ++++++++++++++++++++++++------------------------ 1 files changed, 29 insertions(+), 29 deletions(-) diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index fb994e9..75637ad 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -65,12 +65,12 @@ static void s3c_rtc_alarm_clk_enable(bool enable) spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags); if (enable) { if (!alarm_clk_enabled) { - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); alarm_clk_enabled = true; } } else { if (alarm_clk_enabled) { - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); alarm_clk_enabled = false; } } @@ -83,13 +83,13 @@ static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) { struct rtc_device *rdev = id; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF); if (s3c_rtc_cpu_type == TYPE_S3C64XX) writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); s3c_rtc_alarm_clk_enable(false); @@ -100,13 +100,13 @@ static irqreturn_t s3c_rtc_tickirq(int irq, void *id) { struct rtc_device *rdev = id; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF); if (s3c_rtc_cpu_type == TYPE_S3C64XX) writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return IRQ_HANDLED; } @@ -117,14 +117,14 @@ static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) dev_dbg(dev, "%s: aie=%d\n", __func__, enabled); - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; if (enabled) tmp |= S3C2410_RTCALM_ALMEN; writeb(tmp, s3c_rtc_base + S3C2410_RTCALM); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); s3c_rtc_alarm_clk_enable(enabled); @@ -141,7 +141,7 @@ static int s3c_rtc_setfreq(struct device *dev, int freq) if (!is_power_of_2(freq)) return -EINVAL; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); spin_lock_irq(&s3c_rtc_pie_lock); if (s3c_rtc_cpu_type != TYPE_S3C64XX) { @@ -163,7 +163,7 @@ static int s3c_rtc_setfreq(struct device *dev, int freq) writel(tmp, s3c_rtc_base + S3C2410_TICNT); spin_unlock_irq(&s3c_rtc_pie_lock); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; } @@ -175,7 +175,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) unsigned int have_retried = 0; void __iomem *base = s3c_rtc_base; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); retry_get_time: rtc_tm->tm_min = readb(base + S3C2410_RTCMIN); rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR); @@ -209,7 +209,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) rtc_tm->tm_mon -= 1; - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return rtc_valid_tm(rtc_tm); } @@ -229,14 +229,14 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm) return -EINVAL; } - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); writeb(bin2bcd(tm->tm_sec), base + S3C2410_RTCSEC); writeb(bin2bcd(tm->tm_min), base + S3C2410_RTCMIN); writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR); writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE); writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON); writeb(bin2bcd(year), base + S3C2410_RTCYEAR); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; } @@ -247,7 +247,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) void __iomem *base = s3c_rtc_base; unsigned int alm_en; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); alm_tm->tm_sec = readb(base + S3C2410_ALMSEC); alm_tm->tm_min = readb(base + S3C2410_ALMMIN); alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR); @@ -299,7 +299,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) else alm_tm->tm_year = -1; - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; } @@ -309,7 +309,7 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) void __iomem *base = s3c_rtc_base; unsigned int alrm_en; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", alrm->enabled, 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, @@ -339,7 +339,7 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) s3c_rtc_setaie(dev, alrm->enabled); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; } @@ -347,7 +347,7 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) { unsigned int ticnt; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { ticnt = readw(s3c_rtc_base + S3C2410_RTCCON); ticnt &= S3C64XX_RTCCON_TICEN; @@ -357,7 +357,7 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) } seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; } @@ -378,7 +378,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) if (s3c_rtc_base == NULL) return; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); if (!en) { tmp = readw(base + S3C2410_RTCCON); if (s3c_rtc_cpu_type == TYPE_S3C64XX) @@ -418,7 +418,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) base + S3C2410_RTCCON); } } - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); } static int s3c_rtc_remove(struct platform_device *dev) @@ -498,7 +498,7 @@ static int s3c_rtc_probe(struct platform_device *pdev) return ret; } - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); /* check to see if everything is setup correctly */ @@ -568,7 +568,7 @@ static int s3c_rtc_probe(struct platform_device *pdev) goto err_alarm_irq; } - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; @@ -578,7 +578,7 @@ static int s3c_rtc_probe(struct platform_device *pdev) err_nortc: s3c_rtc_enable(pdev, 0); - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return ret; } @@ -591,7 +591,7 @@ static int ticnt_save, ticnt_en_save; static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) { - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); /* save TICNT for anyone using periodic interrupts */ ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { @@ -606,7 +606,7 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) else dev_err(&pdev->dev, "enable_irq_wake failed\n"); } - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; } @@ -615,7 +615,7 @@ static int s3c_rtc_resume(struct platform_device *pdev) { unsigned int tmp; - clk_enable(rtc_clk); + clk_prepare_enable(rtc_clk); s3c_rtc_enable(pdev, 1); writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT); if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) { @@ -627,7 +627,7 @@ static int s3c_rtc_resume(struct platform_device *pdev) disable_irq_wake(s3c_rtc_alarmno); wake_en = false; } - clk_disable(rtc_clk); + clk_disable_unprepare(rtc_clk); return 0; } -- 1.7.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/