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

source/bootloader/u-boot-2020.01/drivers/clk/tegra/tegra186-clk.c

@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <misc.h>
+#include <asm/arch-tegra/bpmp_abi.h>
+
+static ulong tegra186_clk_get_rate(struct clk *clk)
+{
+	struct mrq_clk_request req;
+	struct mrq_clk_response resp;
+	int ret;
+
+	debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
+	      clk->id);
+
+	req.cmd_and_id = (CMD_CLK_GET_RATE << 24) | clk->id;
+
+	ret = misc_call(clk->dev->parent, MRQ_CLK, &req, sizeof(req), &resp,
+			sizeof(resp));
+	if (ret < 0)
+		return ret;
+
+	return resp.clk_get_rate.rate;
+}
+
+static ulong tegra186_clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct mrq_clk_request req;
+	struct mrq_clk_response resp;
+	int ret;
+
+	debug("%s(clk=%p, rate=%lu) (dev=%p, id=%lu)\n", __func__, clk, rate,
+	      clk->dev, clk->id);
+
+	req.cmd_and_id = (CMD_CLK_SET_RATE << 24) | clk->id;
+	req.clk_set_rate.rate = rate;
+
+	ret = misc_call(clk->dev->parent, MRQ_CLK, &req, sizeof(req), &resp,
+			sizeof(resp));
+	if (ret < 0)
+		return ret;
+
+	return resp.clk_set_rate.rate;
+}
+
+static int tegra186_clk_en_dis(struct clk *clk,
+			       enum mrq_reset_commands cmd)
+{
+	struct mrq_clk_request req;
+	struct mrq_clk_response resp;
+	int ret;
+
+	req.cmd_and_id = (cmd << 24) | clk->id;
+
+	ret = misc_call(clk->dev->parent, MRQ_CLK, &req, sizeof(req), &resp,
+			sizeof(resp));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tegra186_clk_enable(struct clk *clk)
+{
+	debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
+	      clk->id);
+
+	return tegra186_clk_en_dis(clk, CMD_CLK_ENABLE);
+}
+
+static int tegra186_clk_disable(struct clk *clk)
+{
+	debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
+	      clk->id);
+
+	return tegra186_clk_en_dis(clk, CMD_CLK_DISABLE);
+}
+
+static struct clk_ops tegra186_clk_ops = {
+	.get_rate = tegra186_clk_get_rate,
+	.set_rate = tegra186_clk_set_rate,
+	.enable = tegra186_clk_enable,
+	.disable = tegra186_clk_disable,
+};
+
+static int tegra186_clk_probe(struct udevice *dev)
+{
+	debug("%s(dev=%p)\n", __func__, dev);
+
+	return 0;
+}
+
+U_BOOT_DRIVER(tegra186_clk) = {
+	.name		= "tegra186_clk",
+	.id		= UCLASS_CLK,
+	.probe		= tegra186_clk_probe,
+	.ops = &tegra186_clk_ops,
+};