dm: x86: quark: Add an interrupt driver

Add a driver for interrupts on quark and move the code currently in
cpu_irq_init() into its probe() method.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/quark/Makefile

@@ -4,5 +4,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-y += car.o dram.o msg_port.o quark.o
+obj-y += car.o dram.o irq.o msg_port.o quark.o
 obj-y += mrc.o mrc_util.o hte.o smc.o

arch/x86/cpu/quark/irq.c

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ * Copyright (C) 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/irq.h>
+#include <asm/arch/device.h>
+#include <asm/arch/quark.h>
+
+int quark_irq_router_probe(struct udevice *dev)
+{
+	struct quark_rcba *rcba;
+	u32 base;
+
+	qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, LB_RCBA, &base);
+	base &= ~MEM_BAR_EN;
+	rcba = (struct quark_rcba *)base;
+
+	/*
+	 * Route Quark PCI device interrupt pin to PIRQ
+	 *
+	 * Route device#23's INTA/B/C/D to PIRQA/B/C/D
+	 * Route device#20,21's INTA/B/C/D to PIRQE/F/G/H
+	 */
+	writew(PIRQC, &rcba->rmu_ir);
+	writew(PIRQA | (PIRQB << 4) | (PIRQC << 8) | (PIRQD << 12),
+	       &rcba->d23_ir);
+	writew(PIRQD, &rcba->core_ir);
+	writew(PIRQE | (PIRQF << 4) | (PIRQG << 8) | (PIRQH << 12),
+	       &rcba->d20d21_ir);
+
+	return irq_router_common_init(dev);
+}
+
+static const struct udevice_id quark_irq_router_ids[] = {
+	{ .compatible = "intel,quark-irq-router" },
+	{ }
+};
+
+U_BOOT_DRIVER(quark_irq_router_drv) = {
+	.name		= "quark_intel_irq",
+	.id		= UCLASS_IRQ,
+	.of_match	= quark_irq_router_ids,
+	.probe		= quark_irq_router_probe,
+};

arch/x86/cpu/quark/quark.c

@@ -7,12 +7,10 @@
 #include <common.h>
 #include <mmc.h>
 #include <asm/io.h>
-#include <asm/irq.h>
 #include <asm/mrccache.h>
 #include <asm/mtrr.h>
 #include <asm/pci.h>
 #include <asm/post.h>
-#include <asm/processor.h>
 #include <asm/arch/device.h>
 #include <asm/arch/msg_port.h>
 #include <asm/arch/quark.h>
@@ -346,29 +344,6 @@ int cpu_mmc_init(bd_t *bis)
 	return pci_mmc_init("Quark SDHCI", mmc_supported);
 }
 
-void cpu_irq_init(void)
-{
-	struct quark_rcba *rcba;
-	u32 base;
-
-	qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, LB_RCBA, &base);
-	base &= ~MEM_BAR_EN;
-	rcba = (struct quark_rcba *)base;
-
-	/*
-	 * Route Quark PCI device interrupt pin to PIRQ
-	 *
-	 * Route device#23's INTA/B/C/D to PIRQA/B/C/D
-	 * Route device#20,21's INTA/B/C/D to PIRQE/F/G/H
-	 */
-	writew(PIRQC, &rcba->rmu_ir);
-	writew(PIRQA | (PIRQB << 4) | (PIRQC << 8) | (PIRQD << 12),
-	       &rcba->d23_ir);
-	writew(PIRQD, &rcba->core_ir);
-	writew(PIRQE | (PIRQF << 4) | (PIRQG << 8) | (PIRQH << 12),
-	       &rcba->d20d21_ir);
-}
-
 int arch_misc_init(void)
 {
 #ifdef CONFIG_ENABLE_MRC_CACHE

arch/x86/dts/galileo.dts

@@ -84,7 +84,7 @@
 			compatible = "intel,pch7";
 
 			irq-router {
-				compatible = "intel,irq-router";
+				compatible = "intel,quark-irq-router";
 				intel,pirq-config = "pci";
 				intel,pirq-link = <0x60 8>;
 				intel,pirq-mask = <0xdef8>;