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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016, NVIDIA CORPORATION.
*/
#include <common.h>
#include <dm.h>
#include <clk.h>
#include <asm/clk.h>
#include <linux/err.h>
struct sandbox_clk_test {
struct clk clks[SANDBOX_CLK_TEST_NON_DEVM_COUNT];
struct clk *clkps[SANDBOX_CLK_TEST_ID_COUNT];
struct clk_bulk bulk;
};
static const char * const sandbox_clk_test_names[] = {
[SANDBOX_CLK_TEST_ID_FIXED] = "fixed",
[SANDBOX_CLK_TEST_ID_SPI] = "spi",
[SANDBOX_CLK_TEST_ID_I2C] = "i2c",
};
int sandbox_clk_test_get(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
int i, ret;
for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
ret = clk_get_by_name(dev, sandbox_clk_test_names[i],
&sbct->clks[i]);
if (ret)
return ret;
}
return 0;
}
int sandbox_clk_test_devm_get(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
struct clk *clk;
clk = devm_clk_get(dev, "no-an-existing-clock");
if (!IS_ERR(clk)) {
dev_err(dev, "devm_clk_get() should have failed\n");
return -EINVAL;
}
clk = devm_clk_get(dev, "uart2");
if (IS_ERR(clk))
return PTR_ERR(clk);
sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1] = clk;
clk = devm_clk_get_optional(dev, "uart1");
if (IS_ERR(clk))
return PTR_ERR(clk);
sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM2] = clk;
sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM_NULL] = NULL;
clk = devm_clk_get_optional(dev, "not_an_existing_clock");
if (IS_ERR(clk))
return PTR_ERR(clk);
if (clk)
return -EINVAL;
return 0;
}
int sandbox_clk_test_get_bulk(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
return clk_get_bulk(dev, &sbct->bulk);
}
ulong sandbox_clk_test_get_rate(struct udevice *dev, int id)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
return -EINVAL;
return clk_get_rate(sbct->clkps[id]);
}
ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
return -EINVAL;
return clk_set_rate(sbct->clkps[id], rate);
}
int sandbox_clk_test_enable(struct udevice *dev, int id)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
return -EINVAL;
return clk_enable(sbct->clkps[id]);
}
int sandbox_clk_test_enable_bulk(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
return clk_enable_bulk(&sbct->bulk);
}
int sandbox_clk_test_disable(struct udevice *dev, int id)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
return -EINVAL;
return clk_disable(sbct->clkps[id]);
}
int sandbox_clk_test_disable_bulk(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
return clk_disable_bulk(&sbct->bulk);
}
int sandbox_clk_test_free(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
int i, ret;
devm_clk_put(dev, sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1]);
for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
ret = clk_free(&sbct->clks[i]);
if (ret)
return ret;
}
return 0;
}
int sandbox_clk_test_release_bulk(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
return clk_release_bulk(&sbct->bulk);
}
int sandbox_clk_test_valid(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
int i;
for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
if (!clk_valid(sbct->clkps[i]))
if (i != SANDBOX_CLK_TEST_ID_DEVM_NULL)
return -EINVAL;
}
return 0;
}
static int sandbox_clk_test_probe(struct udevice *dev)
{
struct sandbox_clk_test *sbct = dev_get_priv(dev);
int i;
for (i = 0; i < SANDBOX_CLK_TEST_ID_DEVM1; i++)
sbct->clkps[i] = &sbct->clks[i];
for (i = SANDBOX_CLK_TEST_ID_DEVM1; i < SANDBOX_CLK_TEST_ID_COUNT; i++)
sbct->clkps[i] = NULL;
return 0;
}
static const struct udevice_id sandbox_clk_test_ids[] = {
{ .compatible = "sandbox,clk-test" },
{ }
};
U_BOOT_DRIVER(sandbox_clk_test) = {
.name = "sandbox_clk_test",
.id = UCLASS_MISC,
.of_match = sandbox_clk_test_ids,
.probe = sandbox_clk_test_probe,
.priv_auto_alloc_size = sizeof(struct sandbox_clk_test),
};
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