x86: Move UCLASS_IRQ into a separate file

Update this uclass to support the needs of the Apollo Lake ITSS. It
supports four operations.

Move the uclass into a separate directory so that sandbox can use it too.
Add a new Kconfig to control it and enable this on x86.

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

drivers/misc/Kconfig

@@ -203,6 +203,15 @@ config FSL_SEC_MON
 	  Security Monitor can be transitioned on any security failures,
 	  like software violations or hardware security violations.
 
+config IRQ
+	bool "Intel Interrupt controller"
+	depends on X86 || SANDBOX
+	help
+	  This enables support for Intel interrupt controllers, including ITSS.
+	  Some devices have extra features, such as Apollo Lake. The
+	  device has its own uclass since there are several operations
+	  involved.
+
 config JZ4780_EFUSE
 	bool "Ingenic JZ4780 eFUSE support"
 	depends on ARCH_JZ47XX

drivers/misc/Makefile

@@ -41,6 +41,7 @@ obj-$(CONFIG_FS_LOADER) += fs_loader.o
 obj-$(CONFIG_GDSYS_IOEP) += gdsys_ioep.o
 obj-$(CONFIG_GDSYS_RXAUI_CTRL) += gdsys_rxaui_ctrl.o
 obj-$(CONFIG_GDSYS_SOC) += gdsys_soc.o
+obj-$(CONFIG_IRQ) += irq-uclass.o
 obj-$(CONFIG_$(SPL_)I2C_EEPROM) += i2c_eeprom.o
 obj-$(CONFIG_IHS_FPGA) += ihs_fpga.o
 obj-$(CONFIG_IMX8) += imx8/

drivers/misc/irq-uclass.c

@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <irq.h>
+
+int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
+{
+	const struct irq_ops *ops = irq_get_ops(dev);
+
+	if (!ops->route_pmc_gpio_gpe)
+		return -ENOSYS;
+
+	return ops->route_pmc_gpio_gpe(dev, pmc_gpe_num);
+}
+
+int irq_set_polarity(struct udevice *dev, uint irq, bool active_low)
+{
+	const struct irq_ops *ops = irq_get_ops(dev);
+
+	if (!ops->set_polarity)
+		return -ENOSYS;
+
+	return ops->set_polarity(dev, irq, active_low);
+}
+
+int irq_snapshot_polarities(struct udevice *dev)
+{
+	const struct irq_ops *ops = irq_get_ops(dev);
+
+	if (!ops->snapshot_polarities)
+		return -ENOSYS;
+
+	return ops->snapshot_polarities(dev);
+}
+
+int irq_restore_polarities(struct udevice *dev)
+{
+	const struct irq_ops *ops = irq_get_ops(dev);
+
+	if (!ops->restore_polarities)
+		return -ENOSYS;
+
+	return ops->restore_polarities(dev);
+}
+
+UCLASS_DRIVER(irq) = {
+	.id		= UCLASS_IRQ,
+	.name		= "irq",
+};