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Commit ab4eb8b0 authored by Tarun Kanti DebBarma's avatar Tarun Kanti DebBarma Committed by Tony Lindgren
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ARM: OMAP: dmtimer: add error handling to export APIs 



Add error handling code to export APIs.

Signed-off-by: default avatarTarun Kanti DebBarma <tarun.kanti@ti.com>
Reviewed-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent b481113a

arch/arm/plat-omap/dmtimer.c

+77 −25
Original line number Diff line number Diff line
@@ -214,12 +214,16 @@ struct omap_dm_timer *omap_dm_timer_request_specific(int id) 
}

EXPORT_SYMBOL_GPL(omap_dm_timer_request_specific);



void omap_dm_timer_free(struct omap_dm_timer *timer)

int omap_dm_timer_free(struct omap_dm_timer *timer)

{

	if (unlikely(!timer))

		return -EINVAL;



	clk_put(timer->fclk);



	WARN_ON(!timer->reserved);

	timer->reserved = 0;

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_free);
@@ -237,7 +241,9 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_disable); 


int omap_dm_timer_get_irq(struct omap_dm_timer *timer)

{

	if (timer)

		return timer->irq;

	return -EINVAL;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_get_irq);
@@ -281,7 +287,9 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask); 


struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)

{

	if (timer)

		return timer->fclk;

	return NULL;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_get_fclk);
@@ -295,21 +303,25 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask); 


#endif



void omap_dm_timer_trigger(struct omap_dm_timer *timer)

int omap_dm_timer_trigger(struct omap_dm_timer *timer)

{

	if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer%d not enabled.\n", __func__, timer->id);

		return;

	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer not available or enabled.\n", __func__);

		return -EINVAL;

	}



	omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_trigger);



void omap_dm_timer_start(struct omap_dm_timer *timer)

int omap_dm_timer_start(struct omap_dm_timer *timer)

{

	u32 l;



	if (unlikely(!timer))

		return -EINVAL;



	omap_dm_timer_enable(timer);



	if (timer->loses_context) {
@@ -327,25 +339,36 @@ void omap_dm_timer_start(struct omap_dm_timer *timer) 


	/* Save the context */

	timer->context.tclr = l;

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_start);



void omap_dm_timer_stop(struct omap_dm_timer *timer)

int omap_dm_timer_stop(struct omap_dm_timer *timer)

{

	unsigned long rate = 0;

	struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data;



	if (unlikely(!timer))

		return -EINVAL;



	if (!pdata->needs_manual_reset)

		rate = clk_get_rate(timer->fclk);



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



	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_stop);



int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)

{

	int ret;

	struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data;

	struct dmtimer_platform_data *pdata;



	if (unlikely(!timer))

		return -EINVAL;



	pdata = timer->pdev->dev.platform_data;



	if (source < 0 || source >= 3)

		return -EINVAL;
@@ -356,11 +379,14 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) 
}

EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);



void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,

int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,

			    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)
@@ -375,15 +401,19 @@ void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, 
	timer->context.tclr = l;

	timer->context.tldr = load;

	omap_dm_timer_disable(timer);

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_set_load);



/* Optimized set_load which removes costly spin wait in timer_start */

void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,

int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,

                            unsigned int load)

{

	u32 l;



	if (unlikely(!timer))

		return -EINVAL;



	omap_dm_timer_enable(timer);



	if (timer->loses_context) {
@@ -408,14 +438,18 @@ void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, 
	timer->context.tclr = l;

	timer->context.tldr = load;

	timer->context.tcrr = load;

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);



void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,

int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,

			     unsigned int match)

{

	u32 l;



	if (unlikely(!timer))

		return -EINVAL;



	omap_dm_timer_enable(timer);

	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);

	if (enable)
@@ -429,14 +463,18 @@ void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, 
	timer->context.tclr = l;

	timer->context.tmar = match;

	omap_dm_timer_disable(timer);

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_set_match);



void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,

int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,

			   int toggle, int trigger)

{

	u32 l;



	if (unlikely(!timer))

		return -EINVAL;



	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 |
@@ -451,13 +489,17 @@ void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, 
	/* Save the context */

	timer->context.tclr = l;

	omap_dm_timer_disable(timer);

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm);



void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)

int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)

{

	u32 l;



	if (unlikely(!timer))

		return -EINVAL;



	omap_dm_timer_enable(timer);

	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);

	l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
@@ -470,12 +512,16 @@ void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler) 
	/* Save the context */

	timer->context.tclr = l;

	omap_dm_timer_disable(timer);

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_set_prescaler);



void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,

int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,

				  unsigned int value)

{

	if (unlikely(!timer))

		return -EINVAL;



	omap_dm_timer_enable(timer);

	__omap_dm_timer_int_enable(timer, value);
@@ -483,6 +529,7 @@ void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, 
	timer->context.tier = value;

	timer->context.twer = value;

	omap_dm_timer_disable(timer);

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_enable);
@@ -490,8 +537,8 @@ unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer) 
{

	unsigned int l;



	if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer%d not enabled.\n", __func__, timer->id);

	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer not available or enabled.\n", __func__);

		return 0;

	}
@@ -501,18 +548,22 @@ unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer) 
}

EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);



void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)

int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)

{

	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))

		return -EINVAL;



	__omap_dm_timer_write_status(timer, value);

	/* Save the context */

	timer->context.tisr = value;

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);



unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)

{

	if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer%d not enabled.\n", __func__, timer->id);

	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer not iavailable or enabled.\n", __func__);

		return 0;

	}
@@ -520,17 +571,18 @@ unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) 
}

EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);



void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)

int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)

{

	if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer%d not enabled.\n", __func__, timer->id);

		return;

	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {

		pr_err("%s: timer not available or enabled.\n", __func__);

		return -EINVAL;

	}



	omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);



	/* Save the context */

	timer->context.tcrr = value;

	return 0;

}

EXPORT_SYMBOL_GPL(omap_dm_timer_write_counter);

arch/arm/plat-omap/include/plat/dmtimer.h

+12 −12
Original line number Diff line number Diff line
@@ -109,7 +109,7 @@ struct dmtimer_platform_data { 


struct omap_dm_timer *omap_dm_timer_request(void);

struct omap_dm_timer *omap_dm_timer_request_specific(int timer_id);

void omap_dm_timer_free(struct omap_dm_timer *timer);

int omap_dm_timer_free(struct omap_dm_timer *timer);

void omap_dm_timer_enable(struct omap_dm_timer *timer);

void omap_dm_timer_disable(struct omap_dm_timer *timer);
@@ -118,23 +118,23 @@ int omap_dm_timer_get_irq(struct omap_dm_timer *timer); 
u32 omap_dm_timer_modify_idlect_mask(u32 inputmask);

struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer);



void omap_dm_timer_trigger(struct omap_dm_timer *timer);

void omap_dm_timer_start(struct omap_dm_timer *timer);

void omap_dm_timer_stop(struct omap_dm_timer *timer);

int omap_dm_timer_trigger(struct omap_dm_timer *timer);

int omap_dm_timer_start(struct omap_dm_timer *timer);

int omap_dm_timer_stop(struct omap_dm_timer *timer);



int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source);

void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int value);

void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int value);

void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match);

void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, int toggle, int trigger);

void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler);

int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int value);

int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int value);

int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match);

int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, int toggle, int trigger);

int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler);



void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value);

int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value);



unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer);

void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value);

int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value);

unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer);

void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value);

int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value);



int omap_dm_timers_active(void);