GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/reset/tegra186-reset.c

@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <misc.h>
+#include <reset-uclass.h>
+#include <asm/arch-tegra/bpmp_abi.h>
+
+static int tegra186_reset_request(struct reset_ctl *reset_ctl)
+{
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
+	      reset_ctl->dev, reset_ctl->id);
+
+	return 0;
+}
+
+static int tegra186_reset_free(struct reset_ctl *reset_ctl)
+{
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
+	      reset_ctl->dev, reset_ctl->id);
+
+	return 0;
+}
+
+static int tegra186_reset_common(struct reset_ctl *reset_ctl,
+				 enum mrq_reset_commands cmd)
+{
+	struct mrq_reset_request req;
+	int ret;
+
+	req.cmd = cmd;
+	req.reset_id = reset_ctl->id;
+
+	ret = misc_call(reset_ctl->dev->parent, MRQ_RESET, &req, sizeof(req),
+			NULL, 0);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tegra186_reset_assert(struct reset_ctl *reset_ctl)
+{
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
+	      reset_ctl->dev, reset_ctl->id);
+
+	return tegra186_reset_common(reset_ctl, CMD_RESET_ASSERT);
+}
+
+static int tegra186_reset_deassert(struct reset_ctl *reset_ctl)
+{
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
+	      reset_ctl->dev, reset_ctl->id);
+
+	return tegra186_reset_common(reset_ctl, CMD_RESET_DEASSERT);
+}
+
+struct reset_ops tegra186_reset_ops = {
+	.request = tegra186_reset_request,
+	.free = tegra186_reset_free,
+	.rst_assert = tegra186_reset_assert,
+	.rst_deassert = tegra186_reset_deassert,
+};
+
+static int tegra186_reset_probe(struct udevice *dev)
+{
+	debug("%s(dev=%p)\n", __func__, dev);
+
+	return 0;
+}
+
+U_BOOT_DRIVER(tegra186_reset) = {
+	.name		= "tegra186_reset",
+	.id		= UCLASS_RESET,
+	.probe		= tegra186_reset_probe,
+	.ops = &tegra186_reset_ops,
+};