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Date: Wed, 26 Aug 2015 14:35:55 -0500
From: Shenwei Wang <shenwei.wang@...escale.com>
To: <shawn.guo@...aro.org>, <tglx@...utronix.de>,
<jason@...edaemon.net>, <sudeep.holla@....com>
CC: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <b20788@...escale.com>
Subject: [PATCH v2 1/1] irqchip: imx-gpcv2: Simplify the implementation
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@...escale.com>
---
Change log:
v2 - Fixed the typo in the subject.
drivers/irqchip/irq-imx-gpcv2.c | 83 +++++++----------------------------------
1 file changed, 13 insertions(+), 70 deletions(-)
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;
}
--
2.5.0.rc2
--
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