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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/g12a-aoclkc.h>
- #include "clk_meson.h"
- struct meson_clk {
- struct regmap *map;
- };
- #define AO_CLK_GATE0 0x4c
- #define AO_SAR_CLK 0x90
- static struct meson_gate gates[] = {
- MESON_GATE(CLKID_AO_SAR_ADC, AO_CLK_GATE0, 8),
- MESON_GATE(CLKID_AO_SAR_ADC_CLK, AO_SAR_CLK, 8),
- };
- static int meson_set_gate(struct clk *clk, bool on)
- {
- struct meson_clk *priv = dev_get_priv(clk->dev);
- struct meson_gate *gate;
- if (clk->id >= ARRAY_SIZE(gates))
- return -ENOENT;
- gate = &gates[clk->id];
- if (gate->reg == 0)
- return 0;
- 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 struct clk_ops meson_clk_ops = {
- .disable = meson_clk_disable,
- .enable = meson_clk_enable,
- };
- static const struct udevice_id meson_clk_ids[] = {
- { .compatible = "amlogic,meson-g12a-aoclkc" },
- { }
- };
- U_BOOT_DRIVER(meson_clk_axg) = {
- .name = "meson_clk_g12a_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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