irqchip/ath79-cpu: Move the CPU IRQ driver from arch/mips/ath79/

Signed-off-by: Alban Bedel <albeu@free.fr>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1453553867-27003-2-git-send-email-albeu@free.fr
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

2 files changed, 7 insertions, 75 deletions

diff --git a/arch/mips/ath79/irq.c b/arch/mips/ath79/irq.c
index 05b45140bc1f..2dfff1f19004 100644
--- a/arch/mips/ath79/irq.c
+++ b/arch/mips/ath79/irq.c
@@ -128,79 +128,10 @@ static void qca955x_irq_init(void)
 	irq_set_chained_handler(ATH79_CPU_IRQ(3), qca955x_ip3_irq_dispatch);
 }
 
-/*
- * The IP2/IP3 lines are tied to a PCI/WMAC/USB device. Drivers for
- * these devices typically allocate coherent DMA memory, however the
- * DMA controller may still have some unsynchronized data in the FIFO.
- * Issue a flush in the handlers to ensure that the driver sees
- * the update.
- *
- * This array map the interrupt lines to the DDR write buffer channels.
- */
-
-static unsigned irq_wb_chan[8] = {
-	-1, -1, -1, -1, -1, -1, -1, -1,
-};
-
-asmlinkage void plat_irq_dispatch(void)
-{
-	unsigned long pending;
-	int irq;
-
-	pending = read_c0_status() & read_c0_cause() & ST0_IM;
-
-	if (!pending) {
-		spurious_interrupt();
-		return;
-	}
-
-	pending >>= CAUSEB_IP;
-	while (pending) {
-		irq = fls(pending) - 1;
-		if (irq < ARRAY_SIZE(irq_wb_chan) && irq_wb_chan[irq] != -1)
-			ath79_ddr_wb_flush(irq_wb_chan[irq]);
-		do_IRQ(MIPS_CPU_IRQ_BASE + irq);
-		pending &= ~BIT(irq);
-	}
-}
-
-static int __init ar79_cpu_intc_of_init(
-	struct device_node *node, struct device_node *parent)
-{
-	int err, i, count;
-
-	/* Fill the irq_wb_chan table */
-	count = of_count_phandle_with_args(
-		node, "qca,ddr-wb-channels", "#qca,ddr-wb-channel-cells");
-
-	for (i = 0; i < count; i++) {
-		struct of_phandle_args args;
-		u32 irq = i;
-
-		of_property_read_u32_index(
-			node, "qca,ddr-wb-channel-interrupts", i, &irq);
-		if (irq >= ARRAY_SIZE(irq_wb_chan))
-			continue;
-
-		err = of_parse_phandle_with_args(
-			node, "qca,ddr-wb-channels",
-			"#qca,ddr-wb-channel-cells",
-			i, &args);
-		if (err)
-			return err;
-
-		irq_wb_chan[irq] = args.args[0];
-		pr_info("IRQ: Set flush channel of IRQ%d to %d\n",
-			irq, args.args[0]);
-	}
-
-	return mips_cpu_irq_of_init(node, parent);
-}
-IRQCHIP_DECLARE(ar79_cpu_intc, "qca,ar7100-cpu-intc",
-		ar79_cpu_intc_of_init);
-
 void __init arch_init_irq(void)
 {
+	unsigned irq_wb_chan2 = -1;
+	unsigned irq_wb_chan3 = -1;
 	bool misc_is_ar71xx;
 
 	if (mips_machtype == ATH79_MACH_GENERIC_OF) {
@@ -210,13 +141,13 @@ void __init arch_init_irq(void)
 
 	if (soc_is_ar71xx() || soc_is_ar724x() ||
 	    soc_is_ar913x() || soc_is_ar933x()) {
-		irq_wb_chan[2] = 3;
-		irq_wb_chan[3] = 2;
+		irq_wb_chan2 = 3;
+		irq_wb_chan3 = 2;
 	} else if (soc_is_ar934x()) {
-		irq_wb_chan[3] = 2;
+		irq_wb_chan3 = 2;
 	}
 
-	mips_cpu_irq_init();
+	ath79_cpu_irq_init(irq_wb_chan2, irq_wb_chan3);
 
 	if (soc_is_ar71xx() || soc_is_ar913x())
 		misc_is_ar71xx = true;
diff --git a/arch/mips/include/asm/mach-ath79/ath79.h b/arch/mips/include/asm/mach-ath79/ath79.h
index 22a2f56ad5e9..441faa92c3cd 100644
--- a/arch/mips/include/asm/mach-ath79/ath79.h
+++ b/arch/mips/include/asm/mach-ath79/ath79.h
@@ -144,6 +144,7 @@ static inline u32 ath79_reset_rr(unsigned reg)
 void ath79_device_reset_set(u32 mask);
 void ath79_device_reset_clear(u32 mask);
 
+void ath79_cpu_irq_init(unsigned irq_wb_chan2, unsigned irq_wb_chan3);
 void ath79_misc_irq_init(void __iomem *regs, int irq,
 			int irq_base, bool is_ar71xx);