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// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <log.h>
#include <asm/io.h>
#include <clk-uclass.h>
#include <dm.h>
#include <regmap.h>
#include <syscon.h>
#include <dt-bindings/clock/axg-aoclkc.h>
#include "clk_meson.h"
struct meson_clk {
struct regmap *map;
};
#define AO_CLK_GATE0 0x40
#define AO_SAR_CLK 0x90
static struct meson_gate gates[] = {
MESON_GATE(CLKID_AO_SAR_ADC, AO_CLK_GATE0, 7),
MESON_GATE(CLKID_AO_SAR_ADC_CLK, AO_SAR_CLK, 7),
};
static int meson_set_gate(struct clk *clk, bool on)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct meson_gate *gate;
gate = &gates[clk->id];
regmap_update_bits(priv->map, gate->reg,
BIT(gate->bit), on ? BIT(gate->bit) : 0);
return 0;
}
static int meson_clk_enable(struct clk *clk)
{
return meson_set_gate(clk, true);
}
static int meson_clk_disable(struct clk *clk)
{
return meson_set_gate(clk, false);
}
static int meson_clk_probe(struct udevice *dev)
{
struct meson_clk *priv = dev_get_priv(dev);
priv->map = syscon_node_to_regmap(dev_ofnode(dev_get_parent(dev)));
if (IS_ERR(priv->map))
return PTR_ERR(priv->map);
return 0;
}
static int meson_clk_request(struct clk *clk)
{
if (clk->id >= ARRAY_SIZE(gates))
return -ENOENT;
return 0;
}
static struct clk_ops meson_clk_ops = {
.disable = meson_clk_disable,
.enable = meson_clk_enable,
.request = meson_clk_request,
};
static const struct udevice_id meson_clk_ids[] = {
{ .compatible = "amlogic,meson-axg-aoclkc" },
{ }
};
U_BOOT_DRIVER(meson_clk_axg_ao) = {
.name = "meson_clk_axg_ao",
.id = UCLASS_CLK,
.of_match = meson_clk_ids,
.priv_auto = sizeof(struct meson_clk),
.ops = &meson_clk_ops,
.probe = meson_clk_probe,
};
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