diff mbox

[v2,1/1] irqchip: imx-gpcv2: Simplify the implementation

Message ID 1440617755-2942-1-git-send-email-shenwei.wang@freescale.com (mailing list archive)
State New, archived
Headers show

Commit Message

Shenwei Wang Aug. 26, 2015, 7:35 p.m. UTC 
Based on Sudeep Holla's review comments, the implementation can
be simplified by using the two flags: IRQCHIP_SKIP_SET_WAKE and
IRQCHIP_MASK_ON_SUSPEND. This patch enables the flags in the
struct irq_chip and removes the unnecessory syscore_ops callbacks.

Signed-off-by: Shenwei Wang <shenwei.wang@freescale.com>
---
Change log:
	v2 - Fixed the typo in the subject.

 drivers/irqchip/irq-imx-gpcv2.c | 83 +++++++----------------------------------
 1 file changed, 13 insertions(+), 70 deletions(-)

--
2.5.0.rc2

Comments

Thomas Gleixner Aug. 28, 2015, 7:11 p.m. UTC | #1 
On Wed, 26 Aug 2015, Shenwei Wang wrote:
>  u32 imx_gpcv2_get_wakeup_source(u32 **sources)
>  {
> -	if (!imx_gpcv2_instance)
> +	struct gpcv2_irqchip_data *cd;
> +	void __iomem *reg;
> +	int i;
> +
> +	cd = imx_gpcv2_instance;
> +	if (!cd)
>  		return 0;
> 
> +	for (i = 0; i < IMR_NUM; i++) {
> +		reg = cd->gpc_base + cd->cpu2wakeup + i * 4;
> +		cd->wakeup_sources[i] = readl_relaxed(reg);
> +	}
> +
>  	if (sources)
> -		*sources = imx_gpcv2_instance->wakeup_sources;
> +		*sources = cd->wakeup_sources;
> 
>  	return IMR_NUM;
>  }

So once again. As you said before nothing is going to use the case
where source == NULL, can we please get rid of it?

Thanks,

	tglx
Shenwei Wang Aug. 28, 2015, 7:23 p.m. UTC | #2 
> -----Original Message-----

> From: Thomas Gleixner [mailto:tglx@linutronix.de]

> Sent: 2015?8?28? 14:11

> To: Wang Shenwei-B38339

> Cc: shawn.guo@linaro.org; jason@lakedaemon.net; sudeep.holla@arm.com;

> linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org; Huang

> Yongcai-B20788

> Subject: Re: [PATCH v2 1/1] irqchip: imx-gpcv2: Simplify the implementation

> 

> On Wed, 26 Aug 2015, Shenwei Wang wrote:

> >  u32 imx_gpcv2_get_wakeup_source(u32 **sources)  {

> > -	if (!imx_gpcv2_instance)

> > +	struct gpcv2_irqchip_data *cd;

> > +	void __iomem *reg;

> > +	int i;

> > +

> > +	cd = imx_gpcv2_instance;

> > +	if (!cd)

> >  		return 0;

> >

> > +	for (i = 0; i < IMR_NUM; i++) {

> > +		reg = cd->gpc_base + cd->cpu2wakeup + i * 4;

> > +		cd->wakeup_sources[i] = readl_relaxed(reg);

> > +	}

> > +

> >  	if (sources)

> > -		*sources = imx_gpcv2_instance->wakeup_sources;

> > +		*sources = cd->wakeup_sources;

> >

> >  	return IMR_NUM;

> >  }

> 

> So once again. As you said before nothing is going to use the case where source

> == NULL, can we please get rid of it?


It will be used to allocate the memory for the predefined values of interrupts for each power
Domain. Can we keep it?

Thanks,
Shenwei

> Thanks,

> 

> 	tglx
Thomas Gleixner Aug. 28, 2015, 7:44 p.m. UTC | #3 
On Fri, 28 Aug 2015, Shenwei Wang wrote:
> > So once again. As you said before nothing is going to use the case where source
> > == NULL, can we please get rid of it?
> 
> It will be used to allocate the memory for the predefined values of
> interrupts for each power Domain. Can we keep it?

If there is a user depending on it, yes. Seems I misread your answer
on that.

Thanks,

	tglx
diff mbox

Patch

diff --git a/drivers/irqchip/irq-imx-gpcv2.c b/drivers/irqchip/irq-imx-gpcv2.c
index 4a97afa..e25df78 100644
--- a/drivers/irqchip/irq-imx-gpcv2.c
+++ b/drivers/irqchip/irq-imx-gpcv2.c
@@ -22,7 +22,6 @@  struct gpcv2_irqchip_data {
 	struct raw_spinlock    rlock;
 	void __iomem       *gpc_base;
 	u32 wakeup_sources[IMR_NUM];
-	u32 saved_irq_mask[IMR_NUM];
 	u32 cpu2wakeup;
 };

@@ -30,79 +29,25 @@  static struct gpcv2_irqchip_data *imx_gpcv2_instance;

 u32 imx_gpcv2_get_wakeup_source(u32 **sources)
 {
-	if (!imx_gpcv2_instance)
+	struct gpcv2_irqchip_data *cd;
+	void __iomem *reg;
+	int i;
+
+	cd = imx_gpcv2_instance;
+	if (!cd)
 		return 0;

+	for (i = 0; i < IMR_NUM; i++) {
+		reg = cd->gpc_base + cd->cpu2wakeup + i * 4;
+		cd->wakeup_sources[i] = readl_relaxed(reg);
+	}
+
 	if (sources)
-		*sources = imx_gpcv2_instance->wakeup_sources;
+		*sources = cd->wakeup_sources;

 	return IMR_NUM;
 }

-static int gpcv2_wakeup_source_save(void)
-{
-	struct gpcv2_irqchip_data *cd;
-	void __iomem *reg;
-	int i;
-
-	cd = imx_gpcv2_instance;
-	if (!cd)
-		return 0;
-
-	for (i = 0; i < IMR_NUM; i++) {
-		reg = cd->gpc_base + cd->cpu2wakeup + i * 4;
-		cd->saved_irq_mask[i] = readl_relaxed(reg);
-		writel_relaxed(cd->wakeup_sources[i], reg);
-	}
-
-	return 0;
-}
-
-static void gpcv2_wakeup_source_restore(void)
-{
-	struct gpcv2_irqchip_data *cd;
-	void __iomem *reg;
-	int i;
-
-	cd = imx_gpcv2_instance;
-	if (!cd)
-		return;
-
-	for (i = 0; i < IMR_NUM; i++) {
-		reg = cd->gpc_base + cd->cpu2wakeup + i * 4;
-		writel_relaxed(cd->saved_irq_mask[i], reg);
-	}
-}
-
-static struct syscore_ops imx_gpcv2_syscore_ops = {
-	.suspend	= gpcv2_wakeup_source_save,
-	.resume		= gpcv2_wakeup_source_restore,
-};
-
-static int imx_gpcv2_irq_set_wake(struct irq_data *d, unsigned int on)
-{
-	struct gpcv2_irqchip_data *cd = d->chip_data;
-	unsigned int idx = d->hwirq / 32;
-	unsigned long flags;
-	void __iomem *reg;
-	u32 mask, val;
-
-	raw_spin_lock_irqsave(&cd->rlock, flags);
-	reg = cd->gpc_base + cd->cpu2wakeup + idx * 4;
-	mask = 1 << d->hwirq % 32;
-	val = cd->wakeup_sources[idx];
-
-	cd->wakeup_sources[idx] = on ? (val & ~mask) : (val | mask);
-	raw_spin_unlock_irqrestore(&cd->rlock, flags);
-
-	/*
-	 * Do *not* call into the parent, as the GIC doesn't have any
-	 * wake-up facility...
-	 */
-
-	return 0;
-}
-
 static void imx_gpcv2_irq_unmask(struct irq_data *d)
 {
 	struct gpcv2_irqchip_data *cd = d->chip_data;
@@ -140,11 +85,11 @@  static struct irq_chip gpcv2_irqchip_data_chip = {
 	.irq_eoi		= irq_chip_eoi_parent,
 	.irq_mask		= imx_gpcv2_irq_mask,
 	.irq_unmask		= imx_gpcv2_irq_unmask,
-	.irq_set_wake		= imx_gpcv2_irq_set_wake,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 #ifdef CONFIG_SMP
 	.irq_set_affinity	= irq_chip_set_affinity_parent,
 #endif
+	.flags			= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
 };

 static int imx_gpcv2_domain_xlate(struct irq_domain *domain,
@@ -253,7 +198,6 @@  static int __init imx_gpcv2_irqchip_init(struct device_node *node,
 	for (i = 0; i < IMR_NUM; i++) {
 		writel_relaxed(~0, cd->gpc_base + GPC_IMR1_CORE0 + i * 4);
 		writel_relaxed(~0, cd->gpc_base + GPC_IMR1_CORE1 + i * 4);
-		cd->wakeup_sources[i] = ~0;
 	}

 	/* Let CORE0 as the default CPU to wake up by GPC */
@@ -267,7 +211,6 @@  static int __init imx_gpcv2_irqchip_init(struct device_node *node,
 	writel_relaxed(~0x1, cd->gpc_base + cd->cpu2wakeup);

 	imx_gpcv2_instance = cd;
-	register_syscore_ops(&imx_gpcv2_syscore_ops);

 	return 0;
 }