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https://source.denx.de/u-boot/u-boot.git
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0be4b0b651
In case the ops is not implemented, return 0 in the core right away. This is better than having multiple copies of functions which just return 0 in each reset driver. Drop all those empty functions. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Tom Rini <trini@konsulko.com>
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Raspberry Pi 4 firmware reset driver
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*
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* Copyright (C) 2020 Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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*/
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#include <common.h>
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#include <dm.h>
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#include <reset-uclass.h>
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#include <asm/arch/msg.h>
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#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
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static int raspberrypi_reset_request(struct reset_ctl *reset_ctl)
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{
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if (reset_ctl->id >= RASPBERRYPI_FIRMWARE_RESET_NUM_IDS)
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return -EINVAL;
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return 0;
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}
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static int raspberrypi_reset_assert(struct reset_ctl *reset_ctl)
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{
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switch (reset_ctl->id) {
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case RASPBERRYPI_FIRMWARE_RESET_ID_USB:
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bcm2711_notify_vl805_reset();
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return 0;
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default:
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return -EINVAL;
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}
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}
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struct reset_ops raspberrypi_reset_ops = {
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.request = raspberrypi_reset_request,
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.rst_assert = raspberrypi_reset_assert,
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};
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static const struct udevice_id raspberrypi_reset_ids[] = {
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{ .compatible = "raspberrypi,firmware-reset" },
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{ }
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};
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U_BOOT_DRIVER(raspberrypi_reset) = {
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.name = "raspberrypi-reset",
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.id = UCLASS_RESET,
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.of_match = raspberrypi_reset_ids,
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.ops = &raspberrypi_reset_ops,
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};
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