615 lines
14 KiB
C
615 lines
14 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2014 MediaTek Inc.
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* Author: James Liao <jamesjj.liao@mediatek.com>
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*/
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#include <linux/bitops.h>
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#include <linux/clk-provider.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include "clk-mtk.h"
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#include "clk-gate.h"
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#include "clk-mux.h"
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const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };
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EXPORT_SYMBOL_GPL(cg_regs_dummy);
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static int mtk_clk_dummy_enable(struct clk_hw *hw)
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{
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return 0;
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}
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static void mtk_clk_dummy_disable(struct clk_hw *hw) { }
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const struct clk_ops mtk_clk_dummy_ops = {
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.enable = mtk_clk_dummy_enable,
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.disable = mtk_clk_dummy_disable,
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};
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EXPORT_SYMBOL_GPL(mtk_clk_dummy_ops);
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static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,
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unsigned int clk_num)
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{
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int i;
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clk_data->num = clk_num;
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for (i = 0; i < clk_num; i++)
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clk_data->hws[i] = ERR_PTR(-ENOENT);
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}
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struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
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unsigned int clk_num)
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{
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struct clk_hw_onecell_data *clk_data;
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clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, clk_num),
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GFP_KERNEL);
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if (!clk_data)
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return NULL;
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mtk_init_clk_data(clk_data, clk_num);
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return clk_data;
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}
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EXPORT_SYMBOL_GPL(mtk_devm_alloc_clk_data);
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struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
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{
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struct clk_hw_onecell_data *clk_data;
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clk_data = kzalloc(struct_size(clk_data, hws, clk_num), GFP_KERNEL);
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if (!clk_data)
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return NULL;
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mtk_init_clk_data(clk_data, clk_num);
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return clk_data;
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}
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EXPORT_SYMBOL_GPL(mtk_alloc_clk_data);
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void mtk_free_clk_data(struct clk_hw_onecell_data *clk_data)
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{
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kfree(clk_data);
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}
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EXPORT_SYMBOL_GPL(mtk_free_clk_data);
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int mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks, int num,
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struct clk_hw_onecell_data *clk_data)
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{
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int i;
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struct clk_hw *hw;
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if (!clk_data)
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return -ENOMEM;
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for (i = 0; i < num; i++) {
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const struct mtk_fixed_clk *rc = &clks[i];
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if (!IS_ERR_OR_NULL(clk_data->hws[rc->id])) {
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pr_warn("Trying to register duplicate clock ID: %d\n", rc->id);
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continue;
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}
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hw = clk_hw_register_fixed_rate(NULL, rc->name, rc->parent, 0,
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rc->rate);
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if (IS_ERR(hw)) {
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pr_err("Failed to register clk %s: %pe\n", rc->name,
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hw);
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goto err;
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}
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clk_data->hws[rc->id] = hw;
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}
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return 0;
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err:
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while (--i >= 0) {
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const struct mtk_fixed_clk *rc = &clks[i];
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if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
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continue;
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clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
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clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
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}
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return PTR_ERR(hw);
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}
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EXPORT_SYMBOL_GPL(mtk_clk_register_fixed_clks);
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void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num,
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struct clk_hw_onecell_data *clk_data)
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{
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int i;
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if (!clk_data)
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return;
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for (i = num; i > 0; i--) {
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const struct mtk_fixed_clk *rc = &clks[i - 1];
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if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
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continue;
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clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
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clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
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}
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}
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EXPORT_SYMBOL_GPL(mtk_clk_unregister_fixed_clks);
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int mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num,
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struct clk_hw_onecell_data *clk_data)
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{
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int i;
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struct clk_hw *hw;
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if (!clk_data)
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return -ENOMEM;
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for (i = 0; i < num; i++) {
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const struct mtk_fixed_factor *ff = &clks[i];
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if (!IS_ERR_OR_NULL(clk_data->hws[ff->id])) {
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pr_warn("Trying to register duplicate clock ID: %d\n", ff->id);
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continue;
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}
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hw = clk_hw_register_fixed_factor(NULL, ff->name, ff->parent_name,
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ff->flags, ff->mult, ff->div);
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if (IS_ERR(hw)) {
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pr_err("Failed to register clk %s: %pe\n", ff->name,
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hw);
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goto err;
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}
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clk_data->hws[ff->id] = hw;
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}
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return 0;
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err:
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while (--i >= 0) {
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const struct mtk_fixed_factor *ff = &clks[i];
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if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
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continue;
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clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
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clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
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}
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return PTR_ERR(hw);
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}
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EXPORT_SYMBOL_GPL(mtk_clk_register_factors);
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void mtk_clk_unregister_factors(const struct mtk_fixed_factor *clks, int num,
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struct clk_hw_onecell_data *clk_data)
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{
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int i;
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if (!clk_data)
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return;
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for (i = num; i > 0; i--) {
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const struct mtk_fixed_factor *ff = &clks[i - 1];
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if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
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continue;
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clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
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clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
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}
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}
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EXPORT_SYMBOL_GPL(mtk_clk_unregister_factors);
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static struct clk_hw *mtk_clk_register_composite(struct device *dev,
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const struct mtk_composite *mc, void __iomem *base, spinlock_t *lock)
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{
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struct clk_hw *hw;
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struct clk_mux *mux = NULL;
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struct clk_gate *gate = NULL;
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struct clk_divider *div = NULL;
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struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
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const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
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const char * const *parent_names;
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const char *parent;
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int num_parents;
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int ret;
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if (mc->mux_shift >= 0) {
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mux = kzalloc(sizeof(*mux), GFP_KERNEL);
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if (!mux)
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return ERR_PTR(-ENOMEM);
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mux->reg = base + mc->mux_reg;
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mux->mask = BIT(mc->mux_width) - 1;
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mux->shift = mc->mux_shift;
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mux->lock = lock;
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mux->flags = mc->mux_flags;
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mux_hw = &mux->hw;
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mux_ops = &clk_mux_ops;
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parent_names = mc->parent_names;
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num_parents = mc->num_parents;
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} else {
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parent = mc->parent;
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parent_names = &parent;
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num_parents = 1;
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}
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if (mc->gate_shift >= 0) {
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gate = kzalloc(sizeof(*gate), GFP_KERNEL);
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if (!gate) {
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ret = -ENOMEM;
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goto err_out;
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}
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gate->reg = base + mc->gate_reg;
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gate->bit_idx = mc->gate_shift;
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gate->flags = CLK_GATE_SET_TO_DISABLE;
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gate->lock = lock;
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gate_hw = &gate->hw;
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gate_ops = &clk_gate_ops;
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}
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if (mc->divider_shift >= 0) {
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div = kzalloc(sizeof(*div), GFP_KERNEL);
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if (!div) {
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ret = -ENOMEM;
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goto err_out;
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}
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div->reg = base + mc->divider_reg;
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div->shift = mc->divider_shift;
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div->width = mc->divider_width;
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div->lock = lock;
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div_hw = &div->hw;
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div_ops = &clk_divider_ops;
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}
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hw = clk_hw_register_composite(dev, mc->name, parent_names, num_parents,
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mux_hw, mux_ops,
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div_hw, div_ops,
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gate_hw, gate_ops,
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mc->flags);
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if (IS_ERR(hw)) {
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ret = PTR_ERR(hw);
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goto err_out;
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}
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return hw;
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err_out:
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kfree(div);
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kfree(gate);
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kfree(mux);
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return ERR_PTR(ret);
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}
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static void mtk_clk_unregister_composite(struct clk_hw *hw)
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{
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struct clk_composite *composite;
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struct clk_mux *mux = NULL;
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struct clk_gate *gate = NULL;
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struct clk_divider *div = NULL;
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if (!hw)
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return;
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composite = to_clk_composite(hw);
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if (composite->mux_hw)
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mux = to_clk_mux(composite->mux_hw);
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if (composite->gate_hw)
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gate = to_clk_gate(composite->gate_hw);
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if (composite->rate_hw)
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div = to_clk_divider(composite->rate_hw);
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clk_hw_unregister_composite(hw);
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kfree(div);
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kfree(gate);
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kfree(mux);
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}
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int mtk_clk_register_composites(struct device *dev,
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const struct mtk_composite *mcs, int num,
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void __iomem *base, spinlock_t *lock,
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struct clk_hw_onecell_data *clk_data)
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{
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struct clk_hw *hw;
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int i;
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if (!clk_data)
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return -ENOMEM;
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for (i = 0; i < num; i++) {
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const struct mtk_composite *mc = &mcs[i];
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if (!IS_ERR_OR_NULL(clk_data->hws[mc->id])) {
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pr_warn("Trying to register duplicate clock ID: %d\n",
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mc->id);
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continue;
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}
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hw = mtk_clk_register_composite(dev, mc, base, lock);
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if (IS_ERR(hw)) {
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pr_err("Failed to register clk %s: %pe\n", mc->name,
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hw);
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goto err;
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}
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clk_data->hws[mc->id] = hw;
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}
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return 0;
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err:
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while (--i >= 0) {
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const struct mtk_composite *mc = &mcs[i];
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if (IS_ERR_OR_NULL(clk_data->hws[mcs->id]))
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continue;
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mtk_clk_unregister_composite(clk_data->hws[mc->id]);
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clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
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}
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return PTR_ERR(hw);
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}
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EXPORT_SYMBOL_GPL(mtk_clk_register_composites);
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void mtk_clk_unregister_composites(const struct mtk_composite *mcs, int num,
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struct clk_hw_onecell_data *clk_data)
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{
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int i;
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if (!clk_data)
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return;
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for (i = num; i > 0; i--) {
|
||
|
|
const struct mtk_composite *mc = &mcs[i - 1];
|
||
|
|
|
||
|
|
if (IS_ERR_OR_NULL(clk_data->hws[mc->id]))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
mtk_clk_unregister_composite(clk_data->hws[mc->id]);
|
||
|
|
clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(mtk_clk_unregister_composites);
|
||
|
|
|
||
|
|
int mtk_clk_register_dividers(const struct mtk_clk_divider *mcds, int num,
|
||
|
|
void __iomem *base, spinlock_t *lock,
|
||
|
|
struct clk_hw_onecell_data *clk_data)
|
||
|
|
{
|
||
|
|
struct clk_hw *hw;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (!clk_data)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
for (i = 0; i < num; i++) {
|
||
|
|
const struct mtk_clk_divider *mcd = &mcds[i];
|
||
|
|
|
||
|
|
if (!IS_ERR_OR_NULL(clk_data->hws[mcd->id])) {
|
||
|
|
pr_warn("Trying to register duplicate clock ID: %d\n",
|
||
|
|
mcd->id);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
hw = clk_hw_register_divider(NULL, mcd->name, mcd->parent_name,
|
||
|
|
mcd->flags, base + mcd->div_reg, mcd->div_shift,
|
||
|
|
mcd->div_width, mcd->clk_divider_flags, lock);
|
||
|
|
|
||
|
|
if (IS_ERR(hw)) {
|
||
|
|
pr_err("Failed to register clk %s: %pe\n", mcd->name,
|
||
|
|
hw);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
clk_data->hws[mcd->id] = hw;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err:
|
||
|
|
while (--i >= 0) {
|
||
|
|
const struct mtk_clk_divider *mcd = &mcds[i];
|
||
|
|
|
||
|
|
if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
clk_hw_unregister_divider(clk_data->hws[mcd->id]);
|
||
|
|
clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
|
||
|
|
}
|
||
|
|
|
||
|
|
return PTR_ERR(hw);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(mtk_clk_register_dividers);
|
||
|
|
|
||
|
|
void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds, int num,
|
||
|
|
struct clk_hw_onecell_data *clk_data)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (!clk_data)
|
||
|
|
return;
|
||
|
|
|
||
|
|
for (i = num; i > 0; i--) {
|
||
|
|
const struct mtk_clk_divider *mcd = &mcds[i - 1];
|
||
|
|
|
||
|
|
if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
clk_hw_unregister_divider(clk_data->hws[mcd->id]);
|
||
|
|
clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(mtk_clk_unregister_dividers);
|
||
|
|
|
||
|
|
int mtk_clk_simple_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
const struct mtk_clk_desc *mcd;
|
||
|
|
struct clk_hw_onecell_data *clk_data;
|
||
|
|
struct device_node *node = pdev->dev.of_node;
|
||
|
|
void __iomem *base;
|
||
|
|
int num_clks, r;
|
||
|
|
|
||
|
|
mcd = of_device_get_match_data(&pdev->dev);
|
||
|
|
if (!mcd)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
/* Composite clocks needs us to pass iomem pointer */
|
||
|
|
if (mcd->composite_clks) {
|
||
|
|
if (!mcd->shared_io)
|
||
|
|
base = devm_platform_ioremap_resource(pdev, 0);
|
||
|
|
else
|
||
|
|
base = of_iomap(node, 0);
|
||
|
|
|
||
|
|
if (IS_ERR_OR_NULL(base))
|
||
|
|
return IS_ERR(base) ? PTR_ERR(base) : -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Calculate how many clk_hw_onecell_data entries to allocate */
|
||
|
|
num_clks = mcd->num_clks + mcd->num_composite_clks;
|
||
|
|
num_clks += mcd->num_fixed_clks + mcd->num_factor_clks;
|
||
|
|
num_clks += mcd->num_mux_clks;
|
||
|
|
|
||
|
|
clk_data = mtk_alloc_clk_data(num_clks);
|
||
|
|
if (!clk_data)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
if (mcd->fixed_clks) {
|
||
|
|
r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
|
||
|
|
mcd->num_fixed_clks, clk_data);
|
||
|
|
if (r)
|
||
|
|
goto free_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mcd->factor_clks) {
|
||
|
|
r = mtk_clk_register_factors(mcd->factor_clks,
|
||
|
|
mcd->num_factor_clks, clk_data);
|
||
|
|
if (r)
|
||
|
|
goto unregister_fixed_clks;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mcd->mux_clks) {
|
||
|
|
r = mtk_clk_register_muxes(&pdev->dev, mcd->mux_clks,
|
||
|
|
mcd->num_mux_clks, node,
|
||
|
|
mcd->clk_lock, clk_data);
|
||
|
|
if (r)
|
||
|
|
goto unregister_factors;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mcd->composite_clks) {
|
||
|
|
/* We don't check composite_lock because it's optional */
|
||
|
|
r = mtk_clk_register_composites(&pdev->dev,
|
||
|
|
mcd->composite_clks,
|
||
|
|
mcd->num_composite_clks,
|
||
|
|
base, mcd->clk_lock, clk_data);
|
||
|
|
if (r)
|
||
|
|
goto unregister_muxes;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mcd->clks) {
|
||
|
|
r = mtk_clk_register_gates(&pdev->dev, node, mcd->clks,
|
||
|
|
mcd->num_clks, clk_data);
|
||
|
|
if (r)
|
||
|
|
goto unregister_composites;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mcd->clk_notifier_func) {
|
||
|
|
struct clk *mfg_mux = clk_data->hws[mcd->mfg_clk_idx]->clk;
|
||
|
|
|
||
|
|
r = mcd->clk_notifier_func(&pdev->dev, mfg_mux);
|
||
|
|
if (r)
|
||
|
|
goto unregister_clks;
|
||
|
|
}
|
||
|
|
|
||
|
|
r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
|
||
|
|
if (r)
|
||
|
|
goto unregister_clks;
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, clk_data);
|
||
|
|
|
||
|
|
if (mcd->rst_desc) {
|
||
|
|
r = mtk_register_reset_controller_with_dev(&pdev->dev,
|
||
|
|
mcd->rst_desc);
|
||
|
|
if (r)
|
||
|
|
goto unregister_clks;
|
||
|
|
}
|
||
|
|
|
||
|
|
return r;
|
||
|
|
|
||
|
|
unregister_clks:
|
||
|
|
if (mcd->clks)
|
||
|
|
mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
|
||
|
|
unregister_composites:
|
||
|
|
if (mcd->composite_clks)
|
||
|
|
mtk_clk_unregister_composites(mcd->composite_clks,
|
||
|
|
mcd->num_composite_clks, clk_data);
|
||
|
|
unregister_muxes:
|
||
|
|
if (mcd->mux_clks)
|
||
|
|
mtk_clk_unregister_muxes(mcd->mux_clks,
|
||
|
|
mcd->num_mux_clks, clk_data);
|
||
|
|
unregister_factors:
|
||
|
|
if (mcd->factor_clks)
|
||
|
|
mtk_clk_unregister_factors(mcd->factor_clks,
|
||
|
|
mcd->num_factor_clks, clk_data);
|
||
|
|
unregister_fixed_clks:
|
||
|
|
if (mcd->fixed_clks)
|
||
|
|
mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
|
||
|
|
mcd->num_fixed_clks, clk_data);
|
||
|
|
free_data:
|
||
|
|
mtk_free_clk_data(clk_data);
|
||
|
|
if (mcd->shared_io && base)
|
||
|
|
iounmap(base);
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
|
||
|
|
|
||
|
|
int mtk_clk_simple_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
const struct mtk_clk_desc *mcd = of_device_get_match_data(&pdev->dev);
|
||
|
|
struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
|
||
|
|
struct device_node *node = pdev->dev.of_node;
|
||
|
|
|
||
|
|
of_clk_del_provider(node);
|
||
|
|
if (mcd->clks)
|
||
|
|
mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
|
||
|
|
if (mcd->composite_clks)
|
||
|
|
mtk_clk_unregister_composites(mcd->composite_clks,
|
||
|
|
mcd->num_composite_clks, clk_data);
|
||
|
|
if (mcd->mux_clks)
|
||
|
|
mtk_clk_unregister_muxes(mcd->mux_clks,
|
||
|
|
mcd->num_mux_clks, clk_data);
|
||
|
|
if (mcd->factor_clks)
|
||
|
|
mtk_clk_unregister_factors(mcd->factor_clks,
|
||
|
|
mcd->num_factor_clks, clk_data);
|
||
|
|
if (mcd->fixed_clks)
|
||
|
|
mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
|
||
|
|
mcd->num_fixed_clks, clk_data);
|
||
|
|
mtk_free_clk_data(clk_data);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(mtk_clk_simple_remove);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|