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// 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 <malloc.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,
.rfree = 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(sandbox_clk) = {
.name = "sandbox_clk",
.id = UCLASS_CLK,
.of_match = sandbox_clk_ids,
.ops = &sandbox_clk_ops,
.probe = sandbox_clk_probe,
.priv_auto = 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];
}
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