irqchip/irq-imx-gpcv2: Add support for i.MX8MQ

Add code needed to support i.MX8MQ.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: cphealy@gmail.com
Cc: l.stach@pengutronix.de
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: "A.s. Dong" <aisheng.dong@nxp.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: linux-imx@nxp.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: NAndrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

drivers/irqchip/irq-imx-gpcv2.c

@@ -17,6 +17,9 @@
 
 #define GPC_IMR1_CORE0		0x30
 #define GPC_IMR1_CORE1		0x40
+#define GPC_IMR1_CORE2		0x1c0
+#define GPC_IMR1_CORE3		0x1d0
+
 
 struct gpcv2_irqchip_data {
 	struct raw_spinlock	rlock;
@@ -192,11 +195,19 @@ static const struct irq_domain_ops gpcv2_irqchip_data_domain_ops = {
 	.free		= irq_domain_free_irqs_common,
 };
 
+static const struct of_device_id gpcv2_of_match[] = {
+	{ .compatible = "fsl,imx7d-gpc",  .data = (const void *) 2 },
+	{ .compatible = "fsl,imx8mq-gpc", .data = (const void *) 4 },
+	{ /* END */ }
+};
+
 static int __init imx_gpcv2_irqchip_init(struct device_node *node,
 			       struct device_node *parent)
 {
 	struct irq_domain *parent_domain, *domain;
 	struct gpcv2_irqchip_data *cd;
+	const struct of_device_id *id;
+	unsigned long core_num;
 	int i;
 
 	if (!parent) {
@@ -204,6 +215,14 @@ static int __init imx_gpcv2_irqchip_init(struct device_node *node,
 		return -ENODEV;
 	}
 
+	id = of_match_node(gpcv2_of_match, node);
+	if (!id) {
+		pr_err("%pOF: unknown compatibility string\n", node);
+		return -ENODEV;
+	}
+
+	core_num = (unsigned long)id->data;
+
 	parent_domain = irq_find_host(parent);
 	if (!parent_domain) {
 		pr_err("%pOF: unable to get parent domain\n", node);
@@ -236,8 +255,16 @@ static int __init imx_gpcv2_irqchip_init(struct device_node *node,
 
 	/* Initially mask all interrupts */
 	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);
+		void __iomem *reg = cd->gpc_base + i * 4;
+
+		switch (core_num) {
+		case 4:
+			writel_relaxed(~0, reg + GPC_IMR1_CORE2);
+			writel_relaxed(~0, reg + GPC_IMR1_CORE3);
+		case 2:	      /* FALLTHROUGH */
+			writel_relaxed(~0, reg + GPC_IMR1_CORE0);
+			writel_relaxed(~0, reg + GPC_IMR1_CORE1);
+		}
 		cd->wakeup_sources[i] = ~0;
 	}