[PATCH v2 6/7] irqchip/irq-imx-gpcv2: Embed syscore_ops in chip context

[Thierry Reding <thierry.reding@gmail.com>]

From: Thierry Reding <treding@nvidia.com>

This enables the syscore callbacks to obtain the IRQ chip context
without relying on a separate global variable.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/irqchip/irq-imx-gpcv2.c | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/irqchip/irq-imx-gpcv2.c b/drivers/irqchip/irq-imx-gpcv2.c
index bdee15a327f3..8e606baf3a01 100644
--- a/drivers/irqchip/irq-imx-gpcv2.c
+++ b/drivers/irqchip/irq-imx-gpcv2.c
@@ -19,6 +19,7 @@
 
 
 struct gpcv2_irqchip_data {
+	struct syscore_ops	syscore;
 	struct raw_spinlock	rlock;
 	void __iomem		*gpc_base;
 	u32			wakeup_sources[IMR_NUM];
@@ -26,7 +27,11 @@ struct gpcv2_irqchip_data {
 	u32			cpu2wakeup;
 };
 
-static struct gpcv2_irqchip_data *imx_gpcv2_instance __ro_after_init;
+static inline struct gpcv2_irqchip_data *
+from_syscore(struct syscore_ops *ops)
+{
+	return container_of(ops, struct gpcv2_irqchip_data, syscore);
+}
 
 static void __iomem *gpcv2_idx_to_reg(struct gpcv2_irqchip_data *cd, int i)
 {
@@ -35,14 +40,10 @@ static void __iomem *gpcv2_idx_to_reg(struct gpcv2_irqchip_data *cd, int i)
 
 static int gpcv2_wakeup_source_save(struct syscore_ops *ops)
 {
-	struct gpcv2_irqchip_data *cd;
+	struct gpcv2_irqchip_data *cd = from_syscore(ops);
 	void __iomem *reg;
 	int i;
 
-	cd = imx_gpcv2_instance;
-	if (!cd)
-		return 0;
-
 	for (i = 0; i < IMR_NUM; i++) {
 		reg = gpcv2_idx_to_reg(cd, i);
 		cd->saved_irq_mask[i] = readl_relaxed(reg);
@@ -54,22 +55,13 @@ static int gpcv2_wakeup_source_save(struct syscore_ops *ops)
 
 static void gpcv2_wakeup_source_restore(struct syscore_ops *ops)
 {
-	struct gpcv2_irqchip_data *cd;
+	struct gpcv2_irqchip_data *cd = from_syscore(ops);
 	int i;
 
-	cd = imx_gpcv2_instance;
-	if (!cd)
-		return;
-
 	for (i = 0; i < IMR_NUM; i++)
 		writel_relaxed(cd->saved_irq_mask[i], gpcv2_idx_to_reg(cd, i));
 }
 
-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;
@@ -275,8 +267,9 @@ 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);
+	cd->syscore.suspend = gpcv2_wakeup_source_save;
+	cd->syscore.resume = gpcv2_wakeup_source_restore;
+	register_syscore_ops(&cd->syscore);
 
 	/*
 	 * Clear the OF_POPULATED flag set in of_irq_init so that
-- 
2.50.0