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@@ -0,0 +1,60 @@
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+// 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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+
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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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+
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+ return 0;
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+}
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+
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+static int raspberrypi_reset_free(struct reset_ctl *reset_ctl)
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+{
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+ return 0;
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+}
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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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+
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+static int raspberrypi_reset_deassert(struct reset_ctl *reset_ctl)
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+{
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+ return 0;
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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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+ .rfree = raspberrypi_reset_free,
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+ .rst_assert = raspberrypi_reset_assert,
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+ .rst_deassert = raspberrypi_reset_deassert,
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+};
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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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+
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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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+
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