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

source/bootloader/u-boot-2020.01/drivers/clk/clk_sandbox.c

@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2015 Google, Inc
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/clk.h>
+
+struct sandbox_clk_priv {
+	bool probed;
+	ulong rate[SANDBOX_CLK_ID_COUNT];
+	bool enabled[SANDBOX_CLK_ID_COUNT];
+	bool requested[SANDBOX_CLK_ID_COUNT];
+};
+
+static ulong sandbox_clk_get_rate(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (!priv->probed)
+		return -ENODEV;
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->rate[clk->id];
+}
+
+static ulong sandbox_clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong old_rate;
+
+	if (!priv->probed)
+		return -ENODEV;
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	if (!rate)
+		return -EINVAL;
+
+	old_rate = priv->rate[clk->id];
+	priv->rate[clk->id] = rate;
+
+	return old_rate;
+}
+
+static int sandbox_clk_enable(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (!priv->probed)
+		return -ENODEV;
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	priv->enabled[clk->id] = true;
+
+	return 0;
+}
+
+static int sandbox_clk_disable(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (!priv->probed)
+		return -ENODEV;
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	priv->enabled[clk->id] = false;
+
+	return 0;
+}
+
+static int sandbox_clk_request(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	priv->requested[clk->id] = true;
+	return 0;
+}
+
+static int sandbox_clk_free(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	priv->requested[clk->id] = false;
+	return 0;
+}
+
+static struct clk_ops sandbox_clk_ops = {
+	.get_rate	= sandbox_clk_get_rate,
+	.set_rate	= sandbox_clk_set_rate,
+	.enable		= sandbox_clk_enable,
+	.disable	= sandbox_clk_disable,
+	.request	= sandbox_clk_request,
+	.free		= sandbox_clk_free,
+};
+
+static int sandbox_clk_probe(struct udevice *dev)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	priv->probed = true;
+	return 0;
+}
+
+static const struct udevice_id sandbox_clk_ids[] = {
+	{ .compatible = "sandbox,clk" },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_sandbox) = {
+	.name		= "clk_sandbox",
+	.id		= UCLASS_CLK,
+	.of_match	= sandbox_clk_ids,
+	.ops		= &sandbox_clk_ops,
+	.probe		= sandbox_clk_probe,
+	.priv_auto_alloc_size = sizeof(struct sandbox_clk_priv),
+};
+
+ulong sandbox_clk_query_rate(struct udevice *dev, int id)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->rate[id];
+}
+
+int sandbox_clk_query_enable(struct udevice *dev, int id)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->enabled[id];
+}
+
+int sandbox_clk_query_requested(struct udevice *dev, int id)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+	return priv->requested[id];
+}