Merge branch 'timers/drivers/timer-ti-dm' into timers/drivers/next (f7867cff) · Commits · EulixOS / Software / Kernel

drivers/clocksource/timer-ti-dm.c

+109 −74

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0+
		/*
		* linux/arch/arm/plat-omap/dmtimer.c
		*
		@@ -15,28 +16,11 @@
		*
		* Copyright (C) 2009 Texas Instruments
		* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License as published by the
		* Free Software Foundation; either version 2 of the License, or (at your
		* option) any later version.
		*
		* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
		* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
		* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
		* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		*
		* You should have received a copy of the GNU General Public License along
		* with this program; if not, write to the Free Software Foundation, Inc.,
		* 675 Mass Ave, Cambridge, MA 02139, USA.
		*/

		#include <linux/clk.h>
		#include <linux/clk-provider.h>
		#include <linux/cpu_pm.h>
		#include <linux/module.h>
		#include <linux/io.h>
		#include <linux/device.h>
		@@ -109,6 +93,47 @@ static void omap_timer_restore_context(struct omap_dm_timer *timer)
		timer->context.tclr);
		}

		static void omap_timer_save_context(struct omap_dm_timer *timer)
		{
		timer->context.tclr =
		omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
		timer->context.twer =
		omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG);
		timer->context.tldr =
		omap_dm_timer_read_reg(timer, OMAP_TIMER_LOAD_REG);
		timer->context.tmar =
		omap_dm_timer_read_reg(timer, OMAP_TIMER_MATCH_REG);
		timer->context.tier = readl_relaxed(timer->irq_ena);
		timer->context.tsicr =
		omap_dm_timer_read_reg(timer, OMAP_TIMER_IF_CTRL_REG);
		}

		static int omap_timer_context_notifier(struct notifier_block *nb,
		unsigned long cmd, void *v)
		{
		struct omap_dm_timer *timer;

		timer = container_of(nb, struct omap_dm_timer, nb);

		switch (cmd) {
		case CPU_CLUSTER_PM_ENTER:
		if ((timer->capability & OMAP_TIMER_ALWON) \|\|
		!atomic_read(&timer->enabled))
		break;
		omap_timer_save_context(timer);
		break;
		case CPU_CLUSTER_PM_ENTER_FAILED:
		case CPU_CLUSTER_PM_EXIT:
		if ((timer->capability & OMAP_TIMER_ALWON) \|\|
		!atomic_read(&timer->enabled))
		break;
		omap_timer_restore_context(timer);
		break;
		}

		return NOTIFY_OK;
		}

		static int omap_dm_timer_reset(struct omap_dm_timer *timer)
		{
		u32 l, timeout = 100000;
		@@ -196,21 +221,7 @@ static int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)

		static void omap_dm_timer_enable(struct omap_dm_timer *timer)
		{
		int c;

		pm_runtime_get_sync(&timer->pdev->dev);

		if (!(timer->capability & OMAP_TIMER_ALWON)) {
		if (timer->get_context_loss_count) {
		c = timer->get_context_loss_count(&timer->pdev->dev);
		if (c != timer->ctx_loss_count) {
		omap_timer_restore_context(timer);
		timer->ctx_loss_count = c;
		}
		} else {
		omap_timer_restore_context(timer);
		}
		}
		}

		static void omap_dm_timer_disable(struct omap_dm_timer *timer)
		@@ -477,7 +488,7 @@ __u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)

		int omap_dm_timer_trigger(struct omap_dm_timer *timer)
		{
		if (unlikely(!timer \|\| pm_runtime_suspended(&timer->pdev->dev))) {
		if (unlikely(!timer \|\| !atomic_read(&timer->enabled))) {
		pr_err("%s: timer not available or enabled.\n", __func__);
		return -EINVAL;
		}
		@@ -501,8 +512,6 @@ static int omap_dm_timer_start(struct omap_dm_timer *timer)
		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
		}

		/* Save the context */
		timer->context.tclr = l;
		return 0;
		}

		@@ -518,37 +527,19 @@ static int omap_dm_timer_stop(struct omap_dm_timer *timer)

		__omap_dm_timer_stop(timer, timer->posted, rate);

		/*
		* Since the register values are computed and written within
		* __omap_dm_timer_stop, we need to use read to retrieve the
		* context.
		*/
		timer->context.tclr =
		omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
		omap_dm_timer_disable(timer);
		return 0;
		}

		static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
		static int omap_dm_timer_set_load(struct omap_dm_timer *timer,
		unsigned int load)
		{
		u32 l;

		if (unlikely(!timer))
		return -EINVAL;

		omap_dm_timer_enable(timer);
		l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
		if (autoreload)
		l \|= OMAP_TIMER_CTRL_AR;
		else
		l &= ~OMAP_TIMER_CTRL_AR;
		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
		omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);

		/* Save the context */
		timer->context.tclr = l;
		timer->context.tldr = load;
		omap_dm_timer_disable(timer);
		return 0;
		}
		@@ -570,15 +561,12 @@ static int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
		omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);

		/* Save the context */
		timer->context.tclr = l;
		timer->context.tmar = match;
		omap_dm_timer_disable(timer);
		return 0;
		}

		static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
		int toggle, int trigger)
		int toggle, int trigger, int autoreload)
		{
		u32 l;

		@@ -588,20 +576,34 @@ static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
		omap_dm_timer_enable(timer);
		l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
		l &= ~(OMAP_TIMER_CTRL_GPOCFG \| OMAP_TIMER_CTRL_SCPWM \|
		OMAP_TIMER_CTRL_PT \| (0x03 << 10));
		OMAP_TIMER_CTRL_PT \| (0x03 << 10) \| OMAP_TIMER_CTRL_AR);
		if (def_on)
		l \|= OMAP_TIMER_CTRL_SCPWM;
		if (toggle)
		l \|= OMAP_TIMER_CTRL_PT;
		l \|= trigger << 10;
		if (autoreload)
		l \|= OMAP_TIMER_CTRL_AR;
		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);

		/* Save the context */
		timer->context.tclr = l;
		omap_dm_timer_disable(timer);
		return 0;
		}

		static int omap_dm_timer_get_pwm_status(struct omap_dm_timer *timer)
		{
		u32 l;

		if (unlikely(!timer))
		return -EINVAL;

		omap_dm_timer_enable(timer);
		l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
		omap_dm_timer_disable(timer);

		return l;
		}

		static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
		int prescaler)
		{
		@@ -619,8 +621,6 @@ static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
		}
		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);

		/* Save the context */
		timer->context.tclr = l;
		omap_dm_timer_disable(timer);
		return 0;
		}
		@@ -634,9 +634,6 @@ static int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
		omap_dm_timer_enable(timer);
		__omap_dm_timer_int_enable(timer, value);

		/* Save the context */
		timer->context.tier = value;
		timer->context.twer = value;
		omap_dm_timer_disable(timer);
		return 0;
		}
		@@ -664,9 +661,6 @@ static int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
		l = omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG) & ~mask;
		omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, l);

		/* Save the context */
		timer->context.tier &= ~mask;
		timer->context.twer &= ~mask;
		omap_dm_timer_disable(timer);
		return 0;
		}
		@@ -675,7 +669,7 @@ static unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
		{
		unsigned int l;

		if (unlikely(!timer \|\| pm_runtime_suspended(&timer->pdev->dev))) {
		if (unlikely(!timer \|\| !atomic_read(&timer->enabled))) {
		pr_err("%s: timer not available or enabled.\n", __func__);
		return 0;
		}
		@@ -687,7 +681,7 @@ static unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)

		static int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
		{
		if (unlikely(!timer \|\| pm_runtime_suspended(&timer->pdev->dev)))
		if (unlikely(!timer \|\| !atomic_read(&timer->enabled)))
		return -EINVAL;

		__omap_dm_timer_write_status(timer, value);
		@@ -697,7 +691,7 @@ static int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int

		static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
		{
		if (unlikely(!timer \|\| pm_runtime_suspended(&timer->pdev->dev))) {
		if (unlikely(!timer \|\| !atomic_read(&timer->enabled))) {
		pr_err("%s: timer not iavailable or enabled.\n", __func__);
		return 0;
		}
		@@ -707,7 +701,7 @@ static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)

		static int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
		{
		if (unlikely(!timer \|\| pm_runtime_suspended(&timer->pdev->dev))) {
		if (unlikely(!timer \|\| !atomic_read(&timer->enabled))) {
		pr_err("%s: timer not available or enabled.\n", __func__);
		return -EINVAL;
		}
		@@ -735,6 +729,37 @@ int omap_dm_timers_active(void)
		return 0;
		}

		static int __maybe_unused omap_dm_timer_runtime_suspend(struct device *dev)
		{
		struct omap_dm_timer *timer = dev_get_drvdata(dev);

		atomic_set(&timer->enabled, 0);

		if (timer->capability & OMAP_TIMER_ALWON \|\| !timer->func_base)
		return 0;

		omap_timer_save_context(timer);

		return 0;
		}

		static int __maybe_unused omap_dm_timer_runtime_resume(struct device *dev)
		{
		struct omap_dm_timer *timer = dev_get_drvdata(dev);

		if (!(timer->capability & OMAP_TIMER_ALWON) && timer->func_base)
		omap_timer_restore_context(timer);

		atomic_set(&timer->enabled, 1);

		return 0;
		}

		static const struct dev_pm_ops omap_dm_timer_pm_ops = {
		SET_RUNTIME_PM_OPS(omap_dm_timer_runtime_suspend,
		omap_dm_timer_runtime_resume, NULL)
		};

		static const struct of_device_id omap_timer_match[];

		/**
		@@ -776,6 +801,8 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
		if (IS_ERR(timer->io_base))
		return PTR_ERR(timer->io_base);

		platform_set_drvdata(pdev, timer);

		if (dev->of_node) {
		if (of_find_property(dev->of_node, "ti,timer-alwon", NULL))
		timer->capability \|= OMAP_TIMER_ALWON;
		@@ -789,7 +816,11 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
		timer->id = pdev->id;
		timer->capability = pdata->timer_capability;
		timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
		timer->get_context_loss_count = pdata->get_context_loss_count;
		}

		if (!(timer->capability & OMAP_TIMER_ALWON)) {
		timer->nb.notifier_call = omap_timer_context_notifier;
		cpu_pm_register_notifier(&timer->nb);
		}

		if (pdata)
		@@ -843,6 +874,8 @@ static int omap_dm_timer_remove(struct platform_device *pdev)
		list_for_each_entry(timer, &omap_timer_list, node)
		if (!strcmp(dev_name(&timer->pdev->dev),
		dev_name(&pdev->dev))) {
		if (!(timer->capability & OMAP_TIMER_ALWON))
		cpu_pm_unregister_notifier(&timer->nb);
		list_del(&timer->node);
		ret = 0;
		break;
		@@ -871,6 +904,7 @@ static const struct omap_dm_timer_ops dmtimer_ops = {
		.set_load = omap_dm_timer_set_load,
		.set_match = omap_dm_timer_set_match,
		.set_pwm = omap_dm_timer_set_pwm,
		.get_pwm_status = omap_dm_timer_get_pwm_status,
		.set_prescaler = omap_dm_timer_set_prescaler,
		.read_counter = omap_dm_timer_read_counter,
		.write_counter = omap_dm_timer_write_counter,
		@@ -921,6 +955,7 @@ static struct platform_driver omap_dm_timer_driver = {
		.driver = {
		.name = "omap_timer",
		.of_match_table = of_match_ptr(omap_timer_match),
		.pm = &omap_dm_timer_pm_ops,
		},
		};

drivers/pwm/pwm-omap-dmtimer.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -183,7 +183,7 @@ static int pwm_omap_dmtimer_config(struct pwm_chip *chip,
		if (timer_active)
		omap->pdata->stop(omap->dm_timer);

		omap->pdata->set_load(omap->dm_timer, true, load_value);
		omap->pdata->set_load(omap->dm_timer, load_value);
		omap->pdata->set_match(omap->dm_timer, true, match_value);

		dev_dbg(chip->dev, "load value: %#08x (%d), match value: %#08x (%d)\n",
		@@ -192,7 +192,8 @@ static int pwm_omap_dmtimer_config(struct pwm_chip *chip,
		omap->pdata->set_pwm(omap->dm_timer,
		pwm_get_polarity(pwm) == PWM_POLARITY_INVERSED,
		true,
		PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE);
		PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE,
		true);

		/* If config was called while timer was running it must be reenabled. */
		if (timer_active)
		@@ -222,7 +223,8 @@ static int pwm_omap_dmtimer_set_polarity(struct pwm_chip *chip,
		omap->pdata->set_pwm(omap->dm_timer,
		polarity == PWM_POLARITY_INVERSED,
		true,
		PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE);
		PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE,
		true);
		mutex_unlock(&omap->mutex);

		return 0;

include/clocksource/timer-ti-dm.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -105,17 +105,17 @@ struct omap_dm_timer {
		void __iomem pend; / write pending */
		void __iomem func_base; / function register base */

		atomic_t enabled;
		unsigned long rate;
		unsigned reserved:1;
		unsigned posted:1;
		struct timer_regs context;
		int (get_context_loss_count)(struct device );
		int ctx_loss_count;
		int revision;
		u32 capability;
		u32 errata;
		struct platform_device *pdev;
		struct list_head node;
		struct notifier_block nb;
		};

		int omap_dm_timer_reserve_systimer(int id);

include/linux/platform_data/dmtimer-omap.h

+3 −3

Original line number	Diff line number	Diff line
		@@ -30,12 +30,12 @@ struct omap_dm_timer_ops {
		int (stop)(struct omap_dm_timer timer);
		int (set_source)(struct omap_dm_timer timer, int source);

		int (set_load)(struct omap_dm_timer timer, int autoreload,
		unsigned int value);
		int (set_load)(struct omap_dm_timer timer, unsigned int value);
		int (set_match)(struct omap_dm_timer timer, int enable,
		unsigned int match);
		int (set_pwm)(struct omap_dm_timer timer, int def_on,
		int toggle, int trigger);
		int toggle, int trigger, int autoreload);
		int (get_pwm_status)(struct omap_dm_timer timer);
		int (set_prescaler)(struct omap_dm_timer timer, int prescaler);

		unsigned int (read_counter)(struct omap_dm_timer timer);

Original line number	Diff line number	Diff line
		@@ -30,12 +30,12 @@ struct omap_dm_timer_ops {
		int (stop)(struct omap_dm_timer timer);
		int (set_source)(struct omap_dm_timer timer, int source);

		int (set_load)(struct omap_dm_timer timer, int autoreload,
		unsigned int value);
		int (set_load)(struct omap_dm_timer timer, unsigned int value);
		int (set_match)(struct omap_dm_timer timer, int enable,
		unsigned int match);
		int (set_pwm)(struct omap_dm_timer timer, int def_on,
		int toggle, int trigger);
		int toggle, int trigger, int autoreload);
		int (get_pwm_status)(struct omap_dm_timer timer);
		int (set_prescaler)(struct omap_dm_timer timer, int prescaler);

		unsigned int (read_counter)(struct omap_dm_timer timer);