From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932350AbbFRK4G (ORCPT ); Thu, 18 Jun 2015 06:56:06 -0400 Received: from mail-pa0-f46.google.com ([209.85.220.46]:36859 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753463AbbFRKz0 (ORCPT ); Thu, 18 Jun 2015 06:55:26 -0400 From: Viresh Kumar To: Thomas Gleixner , Daniel Lezcano Cc: linaro-kernel@lists.linaro.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Viresh Kumar , Kukjin Kim Subject: [PATCH 06/41] clocksource: exynos_mct: Migrate to new 'set-state' interface Date: Thu, 18 Jun 2015 16:24:20 +0530 Message-Id: X-Mailer: git-send-email 2.4.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 935b05936dbd..82e060cb7b95 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 */ @@ -455,7 +447,10 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt) 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; @@ -482,7 +477,7 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt) static void exynos4_local_timer_stop(struct clock_event_device *evt) { - evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt); + evt->set_state_shutdown(evt); if (mct_int_type == MCT_INT_SPI) free_irq(evt->irq, this_cpu_ptr(&percpu_mct_tick)); else -- 2.4.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: viresh.kumar@linaro.org (Viresh Kumar) Date: Thu, 18 Jun 2015 16:24:20 +0530 Subject: [PATCH 06/41] clocksource: exynos_mct: Migrate to new 'set-state' interface In-Reply-To: References: Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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 935b05936dbd..82e060cb7b95 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 */ @@ -455,7 +447,10 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt) 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; @@ -482,7 +477,7 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt) static void exynos4_local_timer_stop(struct clock_event_device *evt) { - evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt); + evt->set_state_shutdown(evt); if (mct_int_type == MCT_INT_SPI) free_irq(evt->irq, this_cpu_ptr(&percpu_mct_tick)); else -- 2.4.0