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111 lines
2.4 KiB
111 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2015 Linaro Ltd. |
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* Author: Pi-Cheng Chen <[email protected]> |
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*/ |
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#include <linux/clk-provider.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include "clk-mtk.h" |
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#include "clk-cpumux.h" |
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static inline struct mtk_clk_cpumux *to_mtk_clk_cpumux(struct clk_hw *_hw) |
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{ |
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return container_of(_hw, struct mtk_clk_cpumux, hw); |
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} |
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static u8 clk_cpumux_get_parent(struct clk_hw *hw) |
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{ |
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struct mtk_clk_cpumux *mux = to_mtk_clk_cpumux(hw); |
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unsigned int val; |
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regmap_read(mux->regmap, mux->reg, &val); |
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val >>= mux->shift; |
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val &= mux->mask; |
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return val; |
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} |
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static int clk_cpumux_set_parent(struct clk_hw *hw, u8 index) |
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{ |
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struct mtk_clk_cpumux *mux = to_mtk_clk_cpumux(hw); |
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u32 mask, val; |
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val = index << mux->shift; |
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mask = mux->mask << mux->shift; |
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return regmap_update_bits(mux->regmap, mux->reg, mask, val); |
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} |
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static const struct clk_ops clk_cpumux_ops = { |
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.get_parent = clk_cpumux_get_parent, |
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.set_parent = clk_cpumux_set_parent, |
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}; |
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static struct clk * |
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mtk_clk_register_cpumux(const struct mtk_composite *mux, |
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struct regmap *regmap) |
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{ |
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struct mtk_clk_cpumux *cpumux; |
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struct clk *clk; |
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struct clk_init_data init; |
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cpumux = kzalloc(sizeof(*cpumux), GFP_KERNEL); |
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if (!cpumux) |
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return ERR_PTR(-ENOMEM); |
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init.name = mux->name; |
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init.ops = &clk_cpumux_ops; |
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init.parent_names = mux->parent_names; |
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init.num_parents = mux->num_parents; |
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init.flags = mux->flags; |
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cpumux->reg = mux->mux_reg; |
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cpumux->shift = mux->mux_shift; |
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cpumux->mask = BIT(mux->mux_width) - 1; |
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cpumux->regmap = regmap; |
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cpumux->hw.init = &init; |
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clk = clk_register(NULL, &cpumux->hw); |
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if (IS_ERR(clk)) |
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kfree(cpumux); |
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return clk; |
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} |
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int mtk_clk_register_cpumuxes(struct device_node *node, |
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const struct mtk_composite *clks, int num, |
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struct clk_onecell_data *clk_data) |
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{ |
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int i; |
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struct clk *clk; |
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struct regmap *regmap; |
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regmap = device_node_to_regmap(node); |
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if (IS_ERR(regmap)) { |
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pr_err("Cannot find regmap for %pOF: %ld\n", node, |
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PTR_ERR(regmap)); |
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return PTR_ERR(regmap); |
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} |
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for (i = 0; i < num; i++) { |
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const struct mtk_composite *mux = &clks[i]; |
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clk = mtk_clk_register_cpumux(mux, regmap); |
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if (IS_ERR(clk)) { |
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pr_err("Failed to register clk %s: %ld\n", |
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mux->name, PTR_ERR(clk)); |
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continue; |
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} |
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clk_data->clks[mux->id] = clk; |
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} |
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return 0; |
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} |
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MODULE_LICENSE("GPL");
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