mirror of
https://github.com/AsahiLinux/u-boot
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79d66a6ac1
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>
88 lines
2 KiB
C
88 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* IRQ is a type of interrupt controller used on recent Intel SoC.
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*
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* Copyright 2019 Google LLC
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*/
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#ifndef __irq_H
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#define __irq_H
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/**
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* struct irq_ops - Operations for the IRQ
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*/
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struct irq_ops {
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/**
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* route_pmc_gpio_gpe() - Get the GPIO for an event
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*
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* @dev: IRQ device
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* @pmc_gpe_num: Event number to check
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* @returns GPIO for the event, or -ENOENT if none
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*/
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int (*route_pmc_gpio_gpe)(struct udevice *dev, uint pmc_gpe_num);
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/**
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* set_polarity() - Set the IRQ polarity
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*
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* @dev: IRQ device
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* @irq: Interrupt number to set
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* @active_low: true if active low, false for active high
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* @return 0 if OK, -EINVAL if @irq is invalid
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*/
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int (*set_polarity)(struct udevice *dev, uint irq, bool active_low);
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/**
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* snapshot_polarities() - record IRQ polarities for later restore
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*
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* @dev: IRQ device
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* @return 0
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*/
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int (*snapshot_polarities)(struct udevice *dev);
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/**
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* restore_polarities() - restore IRQ polarities
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*
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* @dev: IRQ device
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* @return 0
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*/
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int (*restore_polarities)(struct udevice *dev);
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};
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#define irq_get_ops(dev) ((struct irq_ops *)(dev)->driver->ops)
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/**
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* irq_route_pmc_gpio_gpe() - Get the GPIO for an event
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*
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* @dev: IRQ device
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* @pmc_gpe_num: Event number to check
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* @returns GPIO for the event, or -ENOENT if none
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*/
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int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num);
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/**
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* irq_set_polarity() - Set the IRQ polarity
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*
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* @dev: IRQ device
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* @irq: Interrupt number to set
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* @active_low: true if active low, false for active high
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* @return 0 if OK, -EINVAL if @irq is invalid
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*/
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int irq_set_polarity(struct udevice *dev, uint irq, bool active_low);
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/**
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* irq_snapshot_polarities() - record IRQ polarities for later restore
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*
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* @dev: IRQ device
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* @return 0
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*/
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int irq_snapshot_polarities(struct udevice *dev);
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/**
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* irq_restore_polarities() - restore IRQ polarities
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*
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* @dev: IRQ device
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* @return 0
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*/
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int irq_restore_polarities(struct udevice *dev);
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#endif
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