Commit 91f0f06c authored by Olof Johansson's avatar Olof Johansson
Browse files

Merge branch 'depends/clockevents-cleanups' into next/boards 



Bringing in as an external dependency that the renesas/clock-cleanup2 branch
relies on.

* depends/clockevents-cleanups: (52 commits)
  clocksource: sh_mtu2: Sort headers alphabetically
  clocksource: sh_mtu2: Remove FSF mail address from GPL notice
  clocksource: sh_mtu2: Rename clock to "fck" in the non-legacy case
  clocksource: sh_mtu2: Add support for multiple channels per device
  clocksource: sh_mtu2: Hardcode MTU2 clock event rating to 200
  clocksource: sh_mtu2: Set cpumask to cpu_possible_mask
  clocksource: sh_mtu2: Replace hardcoded register values with macros
  clocksource: sh_mtu2: Allocate channels dynamically
  clocksource: sh_mtu2: Replace kmalloc + memset with kzalloc
  clocksource: sh_mtu2: Add index to struct sh_mtu2_channel
  clocksource: sh_mtu2: Add memory base to sh_mtu2_channel structure
  clocksource: sh_mtu2: Constify name argument to sh_mtu2_register()
  clocksource: sh_mtu2: Split channel setup to separate function
  clocksource: sh_mtu2: Rename struct sh_mtu2_priv to sh_mtu2_device
  clocksource: sh_mtu2: Split channel fields from sh_mtu2_priv
  clocksource: sh_mtu2: Turn sh_mtu2_priv fields into local variables
  clocksource: sh_mtu2: Use request_irq() instead of setup_irq()
  clocksource: sh_tmu: Sort headers alphabetically
  clocksource: sh_tmu: Remove FSF mail address from GPL notice
  clocksource: sh_tmu: Rename clock to "fck" in the non-legacy case
  ...

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parents 4a70e968 346f5e76

drivers/clocksource/sh_cmt.c

+625 −331

File changed.

Preview size limit exceeded, changes collapsed.

drivers/clocksource/sh_mtu2.c

+340 −148
Original line number Diff line number Diff line
@@ -11,37 +11,48 @@ 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */



#include <linux/clk.h>

#include <linux/clockchips.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/spinlock.h>

#include <linux/interrupt.h>

#include <linux/ioport.h>

#include <linux/delay.h>

#include <linux/io.h>

#include <linux/clk.h>

#include <linux/ioport.h>

#include <linux/irq.h>

#include <linux/err.h>

#include <linux/clockchips.h>

#include <linux/sh_timer.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm_domain.h>

#include <linux/pm_runtime.h>

#include <linux/sh_timer.h>

#include <linux/slab.h>

#include <linux/spinlock.h>



struct sh_mtu2_device;



struct sh_mtu2_channel {

	struct sh_mtu2_device *mtu;

	unsigned int index;



	void __iomem *base;

	int irq;



	struct clock_event_device ced;

};



struct sh_mtu2_device {

	struct platform_device *pdev;



struct sh_mtu2_priv {

	void __iomem *mapbase;

	struct clk *clk;

	struct irqaction irqaction;

	struct platform_device *pdev;

	unsigned long rate;

	unsigned long periodic;

	struct clock_event_device ced;



	struct sh_mtu2_channel *channels;

	unsigned int num_channels;



	bool legacy;

	bool has_clockevent;

};



static DEFINE_RAW_SPINLOCK(sh_mtu2_lock);
@@ -55,6 +66,88 @@ static DEFINE_RAW_SPINLOCK(sh_mtu2_lock); 
#define TCNT 5 /* channel register */

#define TGR  6 /* channel register */



#define TCR_CCLR_NONE		(0 << 5)

#define TCR_CCLR_TGRA		(1 << 5)

#define TCR_CCLR_TGRB		(2 << 5)

#define TCR_CCLR_SYNC		(3 << 5)

#define TCR_CCLR_TGRC		(5 << 5)

#define TCR_CCLR_TGRD		(6 << 5)

#define TCR_CCLR_MASK		(7 << 5)

#define TCR_CKEG_RISING		(0 << 3)

#define TCR_CKEG_FALLING	(1 << 3)

#define TCR_CKEG_BOTH		(2 << 3)

#define TCR_CKEG_MASK		(3 << 3)

/* Values 4 to 7 are channel-dependent */

#define TCR_TPSC_P1		(0 << 0)

#define TCR_TPSC_P4		(1 << 0)

#define TCR_TPSC_P16		(2 << 0)

#define TCR_TPSC_P64		(3 << 0)

#define TCR_TPSC_CH0_TCLKA	(4 << 0)

#define TCR_TPSC_CH0_TCLKB	(5 << 0)

#define TCR_TPSC_CH0_TCLKC	(6 << 0)

#define TCR_TPSC_CH0_TCLKD	(7 << 0)

#define TCR_TPSC_CH1_TCLKA	(4 << 0)

#define TCR_TPSC_CH1_TCLKB	(5 << 0)

#define TCR_TPSC_CH1_P256	(6 << 0)

#define TCR_TPSC_CH1_TCNT2	(7 << 0)

#define TCR_TPSC_CH2_TCLKA	(4 << 0)

#define TCR_TPSC_CH2_TCLKB	(5 << 0)

#define TCR_TPSC_CH2_TCLKC	(6 << 0)

#define TCR_TPSC_CH2_P1024	(7 << 0)

#define TCR_TPSC_CH34_P256	(4 << 0)

#define TCR_TPSC_CH34_P1024	(5 << 0)

#define TCR_TPSC_CH34_TCLKA	(6 << 0)

#define TCR_TPSC_CH34_TCLKB	(7 << 0)

#define TCR_TPSC_MASK		(7 << 0)



#define TMDR_BFE		(1 << 6)

#define TMDR_BFB		(1 << 5)

#define TMDR_BFA		(1 << 4)

#define TMDR_MD_NORMAL		(0 << 0)

#define TMDR_MD_PWM_1		(2 << 0)

#define TMDR_MD_PWM_2		(3 << 0)

#define TMDR_MD_PHASE_1		(4 << 0)

#define TMDR_MD_PHASE_2		(5 << 0)

#define TMDR_MD_PHASE_3		(6 << 0)

#define TMDR_MD_PHASE_4		(7 << 0)

#define TMDR_MD_PWM_SYNC	(8 << 0)

#define TMDR_MD_PWM_COMP_CREST	(13 << 0)

#define TMDR_MD_PWM_COMP_TROUGH	(14 << 0)

#define TMDR_MD_PWM_COMP_BOTH	(15 << 0)

#define TMDR_MD_MASK		(15 << 0)



#define TIOC_IOCH(n)		((n) << 4)

#define TIOC_IOCL(n)		((n) << 0)

#define TIOR_OC_RETAIN		(0 << 0)

#define TIOR_OC_0_CLEAR		(1 << 0)

#define TIOR_OC_0_SET		(2 << 0)

#define TIOR_OC_0_TOGGLE	(3 << 0)

#define TIOR_OC_1_CLEAR		(5 << 0)

#define TIOR_OC_1_SET		(6 << 0)

#define TIOR_OC_1_TOGGLE	(7 << 0)

#define TIOR_IC_RISING		(8 << 0)

#define TIOR_IC_FALLING		(9 << 0)

#define TIOR_IC_BOTH		(10 << 0)

#define TIOR_IC_TCNT		(12 << 0)

#define TIOR_MASK		(15 << 0)



#define TIER_TTGE		(1 << 7)

#define TIER_TTGE2		(1 << 6)

#define TIER_TCIEU		(1 << 5)

#define TIER_TCIEV		(1 << 4)

#define TIER_TGIED		(1 << 3)

#define TIER_TGIEC		(1 << 2)

#define TIER_TGIEB		(1 << 1)

#define TIER_TGIEA		(1 << 0)



#define TSR_TCFD		(1 << 7)

#define TSR_TCFU		(1 << 5)

#define TSR_TCFV		(1 << 4)

#define TSR_TGFD		(1 << 3)

#define TSR_TGFC		(1 << 2)

#define TSR_TGFB		(1 << 1)

#define TSR_TGFA		(1 << 0)



static unsigned long mtu2_reg_offs[] = {

	[TCR] = 0,

	[TMDR] = 1,
@@ -65,135 +158,143 @@ static unsigned long mtu2_reg_offs[] = { 
	[TGR] = 8,

};



static inline unsigned long sh_mtu2_read(struct sh_mtu2_priv *p, int reg_nr)

static inline unsigned long sh_mtu2_read(struct sh_mtu2_channel *ch, int reg_nr)

{

	struct sh_timer_config *cfg = p->pdev->dev.platform_data;

	void __iomem *base = p->mapbase;

	unsigned long offs;



	if (reg_nr == TSTR)

		return ioread8(base + cfg->channel_offset);

	if (reg_nr == TSTR) {

		if (ch->mtu->legacy)

			return ioread8(ch->mtu->mapbase);

		else

			return ioread8(ch->mtu->mapbase + 0x280);

	}



	offs = mtu2_reg_offs[reg_nr];



	if ((reg_nr == TCNT) || (reg_nr == TGR))

		return ioread16(base + offs);

		return ioread16(ch->base + offs);

	else

		return ioread8(base + offs);

		return ioread8(ch->base + offs);

}



static inline void sh_mtu2_write(struct sh_mtu2_priv *p, int reg_nr,

static inline void sh_mtu2_write(struct sh_mtu2_channel *ch, int reg_nr,

				unsigned long value)

{

	struct sh_timer_config *cfg = p->pdev->dev.platform_data;

	void __iomem *base = p->mapbase;

	unsigned long offs;



	if (reg_nr == TSTR) {

		iowrite8(value, base + cfg->channel_offset);

		return;

		if (ch->mtu->legacy)

			return iowrite8(value, ch->mtu->mapbase);

		else

			return iowrite8(value, ch->mtu->mapbase + 0x280);

	}



	offs = mtu2_reg_offs[reg_nr];



	if ((reg_nr == TCNT) || (reg_nr == TGR))

		iowrite16(value, base + offs);

		iowrite16(value, ch->base + offs);

	else

		iowrite8(value, base + offs);

		iowrite8(value, ch->base + offs);

}



static void sh_mtu2_start_stop_ch(struct sh_mtu2_priv *p, int start)

static void sh_mtu2_start_stop_ch(struct sh_mtu2_channel *ch, int start)

{

	struct sh_timer_config *cfg = p->pdev->dev.platform_data;

	unsigned long flags, value;



	/* start stop register shared by multiple timer channels */

	raw_spin_lock_irqsave(&sh_mtu2_lock, flags);

	value = sh_mtu2_read(p, TSTR);

	value = sh_mtu2_read(ch, TSTR);



	if (start)

		value |= 1 << cfg->timer_bit;

		value |= 1 << ch->index;

	else

		value &= ~(1 << cfg->timer_bit);

		value &= ~(1 << ch->index);



	sh_mtu2_write(p, TSTR, value);

	sh_mtu2_write(ch, TSTR, value);

	raw_spin_unlock_irqrestore(&sh_mtu2_lock, flags);

}



static int sh_mtu2_enable(struct sh_mtu2_priv *p)

static int sh_mtu2_enable(struct sh_mtu2_channel *ch)

{

	unsigned long periodic;

	unsigned long rate;

	int ret;



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

	dev_pm_syscore_device(&p->pdev->dev, true);

	pm_runtime_get_sync(&ch->mtu->pdev->dev);

	dev_pm_syscore_device(&ch->mtu->pdev->dev, true);



	/* enable clock */

	ret = clk_enable(p->clk);

	ret = clk_enable(ch->mtu->clk);

	if (ret) {

		dev_err(&p->pdev->dev, "cannot enable clock\n");

		dev_err(&ch->mtu->pdev->dev, "ch%u: cannot enable clock\n",

			ch->index);

		return ret;

	}



	/* make sure channel is disabled */

	sh_mtu2_start_stop_ch(p, 0);

	sh_mtu2_start_stop_ch(ch, 0);



	p->rate = clk_get_rate(p->clk) / 64;

	p->periodic = (p->rate + HZ/2) / HZ;

	rate = clk_get_rate(ch->mtu->clk) / 64;

	periodic = (rate + HZ/2) / HZ;



	/* "Periodic Counter Operation" */

	sh_mtu2_write(p, TCR, 0x23); /* TGRA clear, divide clock by 64 */

	sh_mtu2_write(p, TIOR, 0);

	sh_mtu2_write(p, TGR, p->periodic);

	sh_mtu2_write(p, TCNT, 0);

	sh_mtu2_write(p, TMDR, 0);

	sh_mtu2_write(p, TIER, 0x01);

	/*

	 * "Periodic Counter Operation"

	 * Clear on TGRA compare match, divide clock by 64.

	 */

	sh_mtu2_write(ch, TCR, TCR_CCLR_TGRA | TCR_TPSC_P64);

	sh_mtu2_write(ch, TIOR, TIOC_IOCH(TIOR_OC_0_CLEAR) |

		      TIOC_IOCL(TIOR_OC_0_CLEAR));

	sh_mtu2_write(ch, TGR, periodic);

	sh_mtu2_write(ch, TCNT, 0);

	sh_mtu2_write(ch, TMDR, TMDR_MD_NORMAL);

	sh_mtu2_write(ch, TIER, TIER_TGIEA);



	/* enable channel */

	sh_mtu2_start_stop_ch(p, 1);

	sh_mtu2_start_stop_ch(ch, 1);



	return 0;

}



static void sh_mtu2_disable(struct sh_mtu2_priv *p)

static void sh_mtu2_disable(struct sh_mtu2_channel *ch)

{

	/* disable channel */

	sh_mtu2_start_stop_ch(p, 0);

	sh_mtu2_start_stop_ch(ch, 0);



	/* stop clock */

	clk_disable(p->clk);

	clk_disable(ch->mtu->clk);



	dev_pm_syscore_device(&p->pdev->dev, false);

	pm_runtime_put(&p->pdev->dev);

	dev_pm_syscore_device(&ch->mtu->pdev->dev, false);

	pm_runtime_put(&ch->mtu->pdev->dev);

}



static irqreturn_t sh_mtu2_interrupt(int irq, void *dev_id)

{

	struct sh_mtu2_priv *p = dev_id;

	struct sh_mtu2_channel *ch = dev_id;



	/* acknowledge interrupt */

	sh_mtu2_read(p, TSR);

	sh_mtu2_write(p, TSR, 0xfe);

	sh_mtu2_read(ch, TSR);

	sh_mtu2_write(ch, TSR, ~TSR_TGFA);



	/* notify clockevent layer */

	p->ced.event_handler(&p->ced);

	ch->ced.event_handler(&ch->ced);

	return IRQ_HANDLED;

}



static struct sh_mtu2_priv *ced_to_sh_mtu2(struct clock_event_device *ced)

static struct sh_mtu2_channel *ced_to_sh_mtu2(struct clock_event_device *ced)

{

	return container_of(ced, struct sh_mtu2_priv, ced);

	return container_of(ced, struct sh_mtu2_channel, ced);

}



static void sh_mtu2_clock_event_mode(enum clock_event_mode mode,

				    struct clock_event_device *ced)

{

	struct sh_mtu2_priv *p = ced_to_sh_mtu2(ced);

	struct sh_mtu2_channel *ch = ced_to_sh_mtu2(ced);

	int disabled = 0;



	/* deal with old setting first */

	switch (ced->mode) {

	case CLOCK_EVT_MODE_PERIODIC:

		sh_mtu2_disable(p);

		sh_mtu2_disable(ch);

		disabled = 1;

		break;

	default:
@@ -202,12 +303,13 @@ static void sh_mtu2_clock_event_mode(enum clock_event_mode mode, 


	switch (mode) {

	case CLOCK_EVT_MODE_PERIODIC:

		dev_info(&p->pdev->dev, "used for periodic clock events\n");

		sh_mtu2_enable(p);

		dev_info(&ch->mtu->pdev->dev,

			 "ch%u: used for periodic clock events\n", ch->index);

		sh_mtu2_enable(ch);

		break;

	case CLOCK_EVT_MODE_UNUSED:

		if (!disabled)

			sh_mtu2_disable(p);

			sh_mtu2_disable(ch);

		break;

	case CLOCK_EVT_MODE_SHUTDOWN:

	default:
@@ -217,125 +319,207 @@ static void sh_mtu2_clock_event_mode(enum clock_event_mode mode, 


static void sh_mtu2_clock_event_suspend(struct clock_event_device *ced)

{

	pm_genpd_syscore_poweroff(&ced_to_sh_mtu2(ced)->pdev->dev);

	pm_genpd_syscore_poweroff(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);

}



static void sh_mtu2_clock_event_resume(struct clock_event_device *ced)

{

	pm_genpd_syscore_poweron(&ced_to_sh_mtu2(ced)->pdev->dev);

	pm_genpd_syscore_poweron(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);

}



static void sh_mtu2_register_clockevent(struct sh_mtu2_priv *p,

				       char *name, unsigned long rating)

static void sh_mtu2_register_clockevent(struct sh_mtu2_channel *ch,

					const char *name)

{

	struct clock_event_device *ced = &p->ced;

	struct clock_event_device *ced = &ch->ced;

	int ret;



	memset(ced, 0, sizeof(*ced));



	ced->name = name;

	ced->features = CLOCK_EVT_FEAT_PERIODIC;

	ced->rating = rating;

	ced->cpumask = cpumask_of(0);

	ced->rating = 200;

	ced->cpumask = cpu_possible_mask;

	ced->set_mode = sh_mtu2_clock_event_mode;

	ced->suspend = sh_mtu2_clock_event_suspend;

	ced->resume = sh_mtu2_clock_event_resume;



	dev_info(&p->pdev->dev, "used for clock events\n");

	dev_info(&ch->mtu->pdev->dev, "ch%u: used for clock events\n",

		 ch->index);

	clockevents_register_device(ced);



	ret = setup_irq(p->irqaction.irq, &p->irqaction);

	ret = request_irq(ch->irq, sh_mtu2_interrupt,

			  IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,

			  dev_name(&ch->mtu->pdev->dev), ch);

	if (ret) {

		dev_err(&p->pdev->dev, "failed to request irq %d\n",

			p->irqaction.irq);

		dev_err(&ch->mtu->pdev->dev, "ch%u: failed to request irq %d\n",

			ch->index, ch->irq);

		return;

	}

}



static int sh_mtu2_register(struct sh_mtu2_priv *p, char *name,

			    unsigned long clockevent_rating)

static int sh_mtu2_register(struct sh_mtu2_channel *ch, const char *name,

			    bool clockevent)

{

	if (clockevent_rating)

		sh_mtu2_register_clockevent(p, name, clockevent_rating);

	if (clockevent) {

		ch->mtu->has_clockevent = true;

		sh_mtu2_register_clockevent(ch, name);

	}



	return 0;

}



static int sh_mtu2_setup(struct sh_mtu2_priv *p, struct platform_device *pdev)

static int sh_mtu2_setup_channel(struct sh_mtu2_channel *ch, unsigned int index,

				 struct sh_mtu2_device *mtu)

{

	struct sh_timer_config *cfg = pdev->dev.platform_data;

	struct resource *res;

	int irq, ret;

	ret = -ENXIO;

	static const unsigned int channel_offsets[] = {

		0x300, 0x380, 0x000,

	};

	bool clockevent;



	ch->mtu = mtu;



	if (mtu->legacy) {

		struct sh_timer_config *cfg = mtu->pdev->dev.platform_data;



		clockevent = cfg->clockevent_rating != 0;



	memset(p, 0, sizeof(*p));

	p->pdev = pdev;

		ch->irq = platform_get_irq(mtu->pdev, 0);

		ch->base = mtu->mapbase - cfg->channel_offset;

		ch->index = cfg->timer_bit;

	} else {

		char name[6];



	if (!cfg) {

		dev_err(&p->pdev->dev, "missing platform data\n");

		goto err0;

		clockevent = true;



		sprintf(name, "tgi%ua", index);

		ch->irq = platform_get_irq_byname(mtu->pdev, name);

		ch->base = mtu->mapbase + channel_offsets[index];

		ch->index = index;

	}



	if (ch->irq < 0) {

		/* Skip channels with no declared interrupt. */

		if (!mtu->legacy)

			return 0;



		dev_err(&mtu->pdev->dev, "ch%u: failed to get irq\n",

			ch->index);

		return ch->irq;

	}



	platform_set_drvdata(pdev, p);

	return sh_mtu2_register(ch, dev_name(&mtu->pdev->dev), clockevent);

}



	res = platform_get_resource(p->pdev, IORESOURCE_MEM, 0);

static int sh_mtu2_map_memory(struct sh_mtu2_device *mtu)

{

	struct resource *res;



	res = platform_get_resource(mtu->pdev, IORESOURCE_MEM, 0);

	if (!res) {

		dev_err(&p->pdev->dev, "failed to get I/O memory\n");

		goto err0;

		dev_err(&mtu->pdev->dev, "failed to get I/O memory\n");

		return -ENXIO;

	}



	irq = platform_get_irq(p->pdev, 0);

	if (irq < 0) {

		dev_err(&p->pdev->dev, "failed to get irq\n");

		goto err0;

	mtu->mapbase = ioremap_nocache(res->start, resource_size(res));

	if (mtu->mapbase == NULL)

		return -ENXIO;



	/*

	 * In legacy platform device configuration (with one device per channel)

	 * the resource points to the channel base address.

	 */

	if (mtu->legacy) {

		struct sh_timer_config *cfg = mtu->pdev->dev.platform_data;

		mtu->mapbase += cfg->channel_offset;

	}



	/* map memory, let mapbase point to our channel */

	p->mapbase = ioremap_nocache(res->start, resource_size(res));

	if (p->mapbase == NULL) {

		dev_err(&p->pdev->dev, "failed to remap I/O memory\n");

		goto err0;

	return 0;

}



	/* setup data for setup_irq() (too early for request_irq()) */

	p->irqaction.name = dev_name(&p->pdev->dev);

	p->irqaction.handler = sh_mtu2_interrupt;

	p->irqaction.dev_id = p;

	p->irqaction.irq = irq;

	p->irqaction.flags = IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING;

static void sh_mtu2_unmap_memory(struct sh_mtu2_device *mtu)

{

	if (mtu->legacy) {

		struct sh_timer_config *cfg = mtu->pdev->dev.platform_data;

		mtu->mapbase -= cfg->channel_offset;

	}



	/* get hold of clock */

	p->clk = clk_get(&p->pdev->dev, "mtu2_fck");

	if (IS_ERR(p->clk)) {

		dev_err(&p->pdev->dev, "cannot get clock\n");

		ret = PTR_ERR(p->clk);

		goto err1;

	iounmap(mtu->mapbase);

}



	ret = clk_prepare(p->clk);

static int sh_mtu2_setup(struct sh_mtu2_device *mtu,

			 struct platform_device *pdev)

{

	struct sh_timer_config *cfg = pdev->dev.platform_data;

	const struct platform_device_id *id = pdev->id_entry;

	unsigned int i;

	int ret;



	mtu->pdev = pdev;

	mtu->legacy = id->driver_data;



	if (mtu->legacy && !cfg) {

		dev_err(&mtu->pdev->dev, "missing platform data\n");

		return -ENXIO;

	}



	/* Get hold of clock. */

	mtu->clk = clk_get(&mtu->pdev->dev, mtu->legacy ? "mtu2_fck" : "fck");

	if (IS_ERR(mtu->clk)) {

		dev_err(&mtu->pdev->dev, "cannot get clock\n");

		return PTR_ERR(mtu->clk);

	}



	ret = clk_prepare(mtu->clk);

	if (ret < 0)

		goto err2;

		goto err_clk_put;



	/* Map the memory resource. */

	ret = sh_mtu2_map_memory(mtu);

	if (ret < 0) {

		dev_err(&mtu->pdev->dev, "failed to remap I/O memory\n");

		goto err_clk_unprepare;

	}



	/* Allocate and setup the channels. */

	if (mtu->legacy)

		mtu->num_channels = 1;

	else

		mtu->num_channels = 3;



	ret = sh_mtu2_register(p, (char *)dev_name(&p->pdev->dev),

			       cfg->clockevent_rating);

	mtu->channels = kzalloc(sizeof(*mtu->channels) * mtu->num_channels,

				GFP_KERNEL);

	if (mtu->channels == NULL) {

		ret = -ENOMEM;

		goto err_unmap;

	}



	if (mtu->legacy) {

		ret = sh_mtu2_setup_channel(&mtu->channels[0], 0, mtu);

		if (ret < 0)

			goto err_unmap;

	} else {

		for (i = 0; i < mtu->num_channels; ++i) {

			ret = sh_mtu2_setup_channel(&mtu->channels[i], i, mtu);

			if (ret < 0)

		goto err3;

				goto err_unmap;

		}

	}



	platform_set_drvdata(pdev, mtu);



	return 0;

 err3:

	clk_unprepare(p->clk);

 err2:

	clk_put(p->clk);

 err1:

	iounmap(p->mapbase);

 err0:



err_unmap:

	kfree(mtu->channels);

	sh_mtu2_unmap_memory(mtu);

err_clk_unprepare:

	clk_unprepare(mtu->clk);

err_clk_put:

	clk_put(mtu->clk);

	return ret;

}



static int sh_mtu2_probe(struct platform_device *pdev)

{

	struct sh_mtu2_priv *p = platform_get_drvdata(pdev);

	struct sh_timer_config *cfg = pdev->dev.platform_data;

	struct sh_mtu2_device *mtu = platform_get_drvdata(pdev);

	int ret;



	if (!is_early_platform_device(pdev)) {
@@ -343,20 +527,20 @@ static int sh_mtu2_probe(struct platform_device *pdev) 
		pm_runtime_enable(&pdev->dev);

	}



	if (p) {

	if (mtu) {

		dev_info(&pdev->dev, "kept as earlytimer\n");

		goto out;

	}



	p = kmalloc(sizeof(*p), GFP_KERNEL);

	if (p == NULL) {

	mtu = kzalloc(sizeof(*mtu), GFP_KERNEL);

	if (mtu == NULL) {

		dev_err(&pdev->dev, "failed to allocate driver data\n");

		return -ENOMEM;

	}



	ret = sh_mtu2_setup(p, pdev);

	ret = sh_mtu2_setup(mtu, pdev);

	if (ret) {

		kfree(p);

		kfree(mtu);

		pm_runtime_idle(&pdev->dev);

		return ret;

	}
@@ -364,7 +548,7 @@ static int sh_mtu2_probe(struct platform_device *pdev) 
		return 0;



 out:

	if (cfg->clockevent_rating)

	if (mtu->has_clockevent)

		pm_runtime_irq_safe(&pdev->dev);

	else

		pm_runtime_idle(&pdev->dev);
@@ -377,12 +561,20 @@ static int sh_mtu2_remove(struct platform_device *pdev) 
	return -EBUSY; /* cannot unregister clockevent */

}



static const struct platform_device_id sh_mtu2_id_table[] = {

	{ "sh_mtu2", 1 },

	{ "sh-mtu2", 0 },

	{ },

};

MODULE_DEVICE_TABLE(platform, sh_mtu2_id_table);



static struct platform_driver sh_mtu2_device_driver = {

	.probe		= sh_mtu2_probe,

	.remove		= sh_mtu2_remove,

	.driver		= {

		.name	= "sh_mtu2",

	}

	},

	.id_table	= sh_mtu2_id_table,

};



static int __init sh_mtu2_init(void)

drivers/clocksource/sh_tmu.c

+340 −201

File changed.

Preview size limit exceeded, changes collapsed.

include/linux/sh_timer.h

+1 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ struct sh_timer_config { 
	int timer_bit;

	unsigned long clockevent_rating;

	unsigned long clocksource_rating;

	unsigned int channels_mask;

};



#endif /* __SH_TIMER_H__ */

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