From patchwork Mon Aug 10 09:52:08 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Lezcano X-Patchwork-Id: 6981231 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7A4969F373 for ; Mon, 10 Aug 2015 09:55:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 75E3B2068E for ; Mon, 10 Aug 2015 09:55:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9B04E206AA for ; Mon, 10 Aug 2015 09:55:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933356AbbHJJyl (ORCPT ); Mon, 10 Aug 2015 05:54:41 -0400 Received: from mail-wi0-f180.google.com ([209.85.212.180]:34740 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933349AbbHJJyj (ORCPT ); Mon, 10 Aug 2015 05:54:39 -0400 Received: by wicne3 with SMTP id ne3so128875361wic.1 for ; Mon, 10 Aug 2015 02:54:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=IAQcdzi7DukD1nELpz5mExGfuDOr5+XijiU/wCskOW0=; b=iXWf0dJ03DhQbCjRqMxsjKPUpp3ZN/N0RBbGE1gjbpsfKNjgab4Aqk+2KA0064eWRG Qh+fgRYhGhtWveZr7HA3utIjcpiiptKDZ7nQEds96+gsv3RJC+S9IsK7c/oEJ4GrfYRb T9+nfCYyL+QKFyP4Qc9/2mW8fiRgMcb5tRQXspj4XhZiiJ+tJxHEP7+TWcGeVxIrudvM Jp1D09tBUv+2zQHb6mlbr0u5Bi7pPpPPbdrC2RK/fNoI7S6qJ8N359r9W9YVePsNmb1A qN5fnDegy5rBAFHnuxEPulv042mVFdGsSgjOp7O2m7wSzzypXw4i05oZc+vXxKTNaAA+ A1zw== X-Gm-Message-State: ALoCoQl9lhPhoi/tgGvuSVwyAqdYSX+UotYUTlvt0IKzmajePyx0RLOz/ta0xQTZFEiF8Gp8xugG X-Received: by 10.194.11.7 with SMTP id m7mr42471089wjb.56.1439200478337; Mon, 10 Aug 2015 02:54:38 -0700 (PDT) Received: from localhost.localdomain (sju31-1-78-210-255-2.fbx.proxad.net. [78.210.255.2]) by smtp.gmail.com with ESMTPSA id jr5sm28598154wjc.14.2015.08.10.02.54.36 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 10 Aug 2015 02:54:37 -0700 (PDT) From: Daniel Lezcano To: mingo@kernel.org Cc: tglx@linutronix.de, linux-kernel@vger.kernel.org, Viresh Kumar , Kukjin Kim , Kukjin Kim , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org (moderated list:ARM/SAMSUNG EXYNO...), linux-samsung-soc@vger.kernel.org (moderated list:ARM/SAMSUNG EXYNO...) Subject: [PATCH 51/74] clockevents/drivers/exynos_mct: Migrate to new 'set-state' interface Date: Mon, 10 Aug 2015 11:52:08 +0200 Message-Id: <1439200352-26767-51-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1439200352-26767-1-git-send-email-daniel.lezcano@linaro.org> References: <55C87382.4070309@linaro.org> <1439200352-26767-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Viresh Kumar Migrate exynos_mct driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. Cc: Kukjin Kim Signed-off-by: Viresh Kumar Signed-off-by: Daniel Lezcano --- drivers/clocksource/exynos_mct.c | 85 +++++++++++++++++++--------------------- 1 file changed, 40 insertions(+), 45 deletions(-) diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c index 4d2330a..029f96a 100644 --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -257,15 +257,14 @@ static void exynos4_mct_comp0_stop(void) exynos4_mct_write(0, EXYNOS4_MCT_G_INT_ENB); } -static void exynos4_mct_comp0_start(enum clock_event_mode mode, - unsigned long cycles) +static void exynos4_mct_comp0_start(bool periodic, unsigned long cycles) { unsigned int tcon; cycle_t comp_cycle; tcon = readl_relaxed(reg_base + EXYNOS4_MCT_G_TCON); - if (mode == CLOCK_EVT_MODE_PERIODIC) { + if (periodic) { tcon |= MCT_G_TCON_COMP0_AUTO_INC; exynos4_mct_write(cycles, EXYNOS4_MCT_G_COMP0_ADD_INCR); } @@ -283,38 +282,38 @@ static void exynos4_mct_comp0_start(enum clock_event_mode mode, static int exynos4_comp_set_next_event(unsigned long cycles, struct clock_event_device *evt) { - exynos4_mct_comp0_start(evt->mode, cycles); + exynos4_mct_comp0_start(false, cycles); return 0; } -static void exynos4_comp_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) +static int mct_set_state_shutdown(struct clock_event_device *evt) { - unsigned long cycles_per_jiffy; exynos4_mct_comp0_stop(); + return 0; +} - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - cycles_per_jiffy = - (((unsigned long long) NSEC_PER_SEC / HZ * evt->mult) >> evt->shift); - exynos4_mct_comp0_start(mode, cycles_per_jiffy); - break; +static int mct_set_state_periodic(struct clock_event_device *evt) +{ + unsigned long cycles_per_jiffy; - case CLOCK_EVT_MODE_ONESHOT: - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_RESUME: - break; - } + cycles_per_jiffy = (((unsigned long long)NSEC_PER_SEC / HZ * evt->mult) + >> evt->shift); + exynos4_mct_comp0_stop(); + exynos4_mct_comp0_start(true, cycles_per_jiffy); + return 0; } static struct clock_event_device mct_comp_device = { - .name = "mct-comp", - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .rating = 250, - .set_next_event = exynos4_comp_set_next_event, - .set_mode = exynos4_comp_set_mode, + .name = "mct-comp", + .features = CLOCK_EVT_FEAT_PERIODIC | + CLOCK_EVT_FEAT_ONESHOT, + .rating = 250, + .set_next_event = exynos4_comp_set_next_event, + .set_state_periodic = mct_set_state_periodic, + .set_state_shutdown = mct_set_state_shutdown, + .set_state_oneshot = mct_set_state_shutdown, + .tick_resume = mct_set_state_shutdown, }; static irqreturn_t exynos4_mct_comp_isr(int irq, void *dev_id) @@ -390,39 +389,32 @@ static int exynos4_tick_set_next_event(unsigned long cycles, return 0; } -static inline void exynos4_tick_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) +static int set_state_shutdown(struct clock_event_device *evt) +{ + exynos4_mct_tick_stop(this_cpu_ptr(&percpu_mct_tick)); + return 0; +} + +static int set_state_periodic(struct clock_event_device *evt) { struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick); unsigned long cycles_per_jiffy; + cycles_per_jiffy = (((unsigned long long)NSEC_PER_SEC / HZ * evt->mult) + >> evt->shift); exynos4_mct_tick_stop(mevt); - - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - cycles_per_jiffy = - (((unsigned long long) NSEC_PER_SEC / HZ * evt->mult) >> evt->shift); - exynos4_mct_tick_start(cycles_per_jiffy, mevt); - break; - - case CLOCK_EVT_MODE_ONESHOT: - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_RESUME: - break; - } + exynos4_mct_tick_start(cycles_per_jiffy, mevt); + return 0; } static void exynos4_mct_tick_clear(struct mct_clock_event_device *mevt) { - struct clock_event_device *evt = &mevt->evt; - /* * This is for supporting oneshot mode. * Mct would generate interrupt periodically * without explicit stopping. */ - if (evt->mode != CLOCK_EVT_MODE_PERIODIC) + if (!clockevent_state_periodic(&mevt->evt)) exynos4_mct_tick_stop(mevt); /* Clear the MCT tick interrupt */ @@ -453,7 +445,10 @@ static int exynos4_local_timer_setup(struct mct_clock_event_device *mevt) evt->name = mevt->name; evt->cpumask = cpumask_of(cpu); evt->set_next_event = exynos4_tick_set_next_event; - evt->set_mode = exynos4_tick_set_mode; + evt->set_state_periodic = set_state_periodic; + evt->set_state_shutdown = set_state_shutdown; + evt->set_state_oneshot = set_state_shutdown; + evt->tick_resume = set_state_shutdown; evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; evt->rating = 450; @@ -479,7 +474,7 @@ static void exynos4_local_timer_stop(struct mct_clock_event_device *mevt) { struct clock_event_device *evt = &mevt->evt; - evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt); + evt->set_state_shutdown(evt); if (mct_int_type == MCT_INT_SPI) { if (evt->irq != -1) disable_irq_nosync(evt->irq);