drivers/clk/mediatek/clk-mtk.c - kernel/common - Git at Google

 /*
  * Copyright (c) 2014 MediaTek Inc.
  * Author: James Liao <[email protected]>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/clkdev.h>
 #include <linux/mfd/syscon.h>

 #include "clk-mtk.h"
 #include "clk-gate.h"

 struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
 {
 	int i;
 	struct clk_onecell_data *clk_data;

 	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
 	if (!clk_data)
 		return NULL;

 	clk_data->clks = kcalloc(clk_num, sizeof(*clk_data->clks), GFP_KERNEL);
 	if (!clk_data->clks)
 		goto err_out;

 	clk_data->clk_num = clk_num;

 	for (i = 0; i < clk_num; i++)
 		clk_data->clks[i] = ERR_PTR(-ENOENT);

 	return clk_data;
 err_out:
 	kfree(clk_data);

 	return NULL;
 }

 void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks,
 		int num, struct clk_onecell_data *clk_data)
 {
 	int i;
 	struct clk *clk;

 	for (i = 0; i < num; i++) {
 		const struct mtk_fixed_clk *rc = &clks[i];

 		if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[rc->id]))
 			continue;

 		clk = clk_register_fixed_rate(NULL, rc->name, rc->parent, 0,
 					      rc->rate);

 		if (IS_ERR(clk)) {
 			pr_err("Failed to register clk %s: %ld\n",
 					rc->name, PTR_ERR(clk));
 			continue;
 		}

 		if (clk_data)
 			clk_data->clks[rc->id] = clk;
 	}
 }

 void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
 		int num, struct clk_onecell_data *clk_data)
 {
 	int i;
 	struct clk *clk;

 	for (i = 0; i < num; i++) {
 		const struct mtk_fixed_factor *ff = &clks[i];

 		if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[ff->id]))
 			continue;

 		clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
 				CLK_SET_RATE_PARENT, ff->mult, ff->div);

 		if (IS_ERR(clk)) {
 			pr_err("Failed to register clk %s: %ld\n",
 					ff->name, PTR_ERR(clk));
 			continue;
 		}

 		if (clk_data)
 			clk_data->clks[ff->id] = clk;
 	}
 }

 int mtk_clk_register_gates(struct device_node *node,
 		const struct mtk_gate *clks,
 		int num, struct clk_onecell_data *clk_data)
 {
 	int i;
 	struct clk *clk;
 	struct regmap *regmap;

 	if (!clk_data)
 		return -ENOMEM;

 	regmap = syscon_node_to_regmap(node);
 	if (IS_ERR(regmap)) {
 		pr_err("Cannot find regmap for %pOF: %ld\n", node,
 				PTR_ERR(regmap));
 		return PTR_ERR(regmap);
 	}

 	for (i = 0; i < num; i++) {
 		const struct mtk_gate *gate = &clks[i];

 		if (!IS_ERR_OR_NULL(clk_data->clks[gate->id]))
 			continue;

 		clk = mtk_clk_register_gate(gate->name, gate->parent_name,
 				regmap,
 				gate->regs->set_ofs,
 				gate->regs->clr_ofs,
 				gate->regs->sta_ofs,
 				gate->shift, gate->ops);

 		if (IS_ERR(clk)) {
 			pr_err("Failed to register clk %s: %ld\n",
 					gate->name, PTR_ERR(clk));
 			continue;
 		}

 		clk_data->clks[gate->id] = clk;
 	}

 	return 0;
 }

 struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
 		void __iomem *base, spinlock_t *lock)
 {
 	struct clk *clk;
 	struct clk_mux *mux = NULL;
 	struct clk_gate *gate = NULL;
 	struct clk_divider *div = NULL;
 	struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
 	const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
 	const char * const *parent_names;
 	const char *parent;
 	int num_parents;
 	int ret;

 	if (mc->mux_shift >= 0) {
 		mux = kzalloc(sizeof(*mux), GFP_KERNEL);
 		if (!mux)
 			return ERR_PTR(-ENOMEM);

 		mux->reg = base + mc->mux_reg;
 		mux->mask = BIT(mc->mux_width) - 1;
 		mux->shift = mc->mux_shift;
 		mux->lock = lock;

 		mux_hw = &mux->hw;
 		mux_ops = &clk_mux_ops;

 		parent_names = mc->parent_names;
 		num_parents = mc->num_parents;
 	} else {
 		parent = mc->parent;
 		parent_names = &parent;
 		num_parents = 1;
 	}

 	if (mc->gate_shift >= 0) {
 		gate = kzalloc(sizeof(*gate), GFP_KERNEL);
 		if (!gate) {
 			ret = -ENOMEM;
 			goto err_out;
 		}

 		gate->reg = base + mc->gate_reg;
 		gate->bit_idx = mc->gate_shift;
 		gate->flags = CLK_GATE_SET_TO_DISABLE;
 		gate->lock = lock;

 		gate_hw = &gate->hw;
 		gate_ops = &clk_gate_ops;
 	}

 	if (mc->divider_shift >= 0) {
 		div = kzalloc(sizeof(*div), GFP_KERNEL);
 		if (!div) {
 			ret = -ENOMEM;
 			goto err_out;
 		}

 		div->reg = base + mc->divider_reg;
 		div->shift = mc->divider_shift;
 		div->width = mc->divider_width;
 		div->lock = lock;

 		div_hw = &div->hw;
 		div_ops = &clk_divider_ops;
 	}

 	clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
 		mux_hw, mux_ops,
 		div_hw, div_ops,
 		gate_hw, gate_ops,
 		mc->flags);

 	if (IS_ERR(clk)) {
 		ret = PTR_ERR(clk);
 		goto err_out;
 	}

 	return clk;
 err_out:
 	kfree(div);
 	kfree(gate);
 	kfree(mux);

 	return ERR_PTR(ret);
 }

 void mtk_clk_register_composites(const struct mtk_composite *mcs,
 		int num, void __iomem *base, spinlock_t *lock,
 		struct clk_onecell_data *clk_data)
 {
 	struct clk *clk;
 	int i;

 	for (i = 0; i < num; i++) {
 		const struct mtk_composite *mc = &mcs[i];

 		if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[mc->id]))
 			continue;

 		clk = mtk_clk_register_composite(mc, base, lock);

 		if (IS_ERR(clk)) {
 			pr_err("Failed to register clk %s: %ld\n",
 					mc->name, PTR_ERR(clk));
 			continue;
 		}

 		if (clk_data)
 			clk_data->clks[mc->id] = clk;
 	}
 }

 void mtk_clk_register_dividers(const struct mtk_clk_divider *mcds,
 			int num, void __iomem *base, spinlock_t *lock,
 				struct clk_onecell_data *clk_data)
 {
 	struct clk *clk;
 	int i;

 	for (i = 0; i <  num; i++) {
 		const struct mtk_clk_divider *mcd = &mcds[i];

 		if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[mcd->id]))
 			continue;

 		clk = clk_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(clk)) {
 			pr_err("Failed to register clk %s: %ld\n",
 				mcd->name, PTR_ERR(clk));
 			continue;
 		}

 		if (clk_data)
 			clk_data->clks[mcd->id] = clk;
 	}
 }
	/*
	* Copyright (c) 2014 MediaTek Inc.
	* Author: James Liao <[email protected]>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/slab.h>
	#include <linux/delay.h>
	#include <linux/clkdev.h>
	#include <linux/mfd/syscon.h>

	#include "clk-mtk.h"
	#include "clk-gate.h"

	struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
	{
	int i;
	struct clk_onecell_data *clk_data;

	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
	if (!clk_data)
	return NULL;

	clk_data->clks = kcalloc(clk_num, sizeof(*clk_data->clks), GFP_KERNEL);
	if (!clk_data->clks)
	goto err_out;

	clk_data->clk_num = clk_num;

	for (i = 0; i < clk_num; i++)
	clk_data->clks[i] = ERR_PTR(-ENOENT);

	return clk_data;
	err_out:
	kfree(clk_data);

	return NULL;
	}

	void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks,
	int num, struct clk_onecell_data *clk_data)
	{
	int i;
	struct clk *clk;

	for (i = 0; i < num; i++) {
	const struct mtk_fixed_clk *rc = &clks[i];

	if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[rc->id]))
	continue;

	clk = clk_register_fixed_rate(NULL, rc->name, rc->parent, 0,
	rc->rate);

	if (IS_ERR(clk)) {
	pr_err("Failed to register clk %s: %ld\n",
	rc->name, PTR_ERR(clk));
	continue;
	}

	if (clk_data)
	clk_data->clks[rc->id] = clk;
	}
	}

	void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
	int num, struct clk_onecell_data *clk_data)
	{
	int i;
	struct clk *clk;

	for (i = 0; i < num; i++) {
	const struct mtk_fixed_factor *ff = &clks[i];

	if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[ff->id]))
	continue;

	clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
	CLK_SET_RATE_PARENT, ff->mult, ff->div);

	if (IS_ERR(clk)) {
	pr_err("Failed to register clk %s: %ld\n",
	ff->name, PTR_ERR(clk));
	continue;
	}

	if (clk_data)
	clk_data->clks[ff->id] = clk;
	}
	}

	int mtk_clk_register_gates(struct device_node *node,
	const struct mtk_gate *clks,
	int num, struct clk_onecell_data *clk_data)
	{
	int i;
	struct clk *clk;
	struct regmap *regmap;

	if (!clk_data)
	return -ENOMEM;

	regmap = syscon_node_to_regmap(node);
	if (IS_ERR(regmap)) {
	pr_err("Cannot find regmap for %pOF: %ld\n", node,
	PTR_ERR(regmap));
	return PTR_ERR(regmap);
	}

	for (i = 0; i < num; i++) {
	const struct mtk_gate *gate = &clks[i];

	if (!IS_ERR_OR_NULL(clk_data->clks[gate->id]))
	continue;

	clk = mtk_clk_register_gate(gate->name, gate->parent_name,
	regmap,
	gate->regs->set_ofs,
	gate->regs->clr_ofs,
	gate->regs->sta_ofs,
	gate->shift, gate->ops);

	if (IS_ERR(clk)) {
	pr_err("Failed to register clk %s: %ld\n",
	gate->name, PTR_ERR(clk));
	continue;
	}

	clk_data->clks[gate->id] = clk;
	}

	return 0;
	}

	struct clk mtk_clk_register_composite(const struct mtk_composite mc,
	void __iomem base, spinlock_t lock)
	{
	struct clk *clk;
	struct clk_mux *mux = NULL;
	struct clk_gate *gate = NULL;
	struct clk_divider *div = NULL;
	struct clk_hw mux_hw = NULL, gate_hw = NULL, *div_hw = NULL;
	const struct clk_ops mux_ops = NULL, gate_ops = NULL, *div_ops = NULL;
	const char * const *parent_names;
	const char *parent;
	int num_parents;
	int ret;

	if (mc->mux_shift >= 0) {
	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
	if (!mux)
	return ERR_PTR(-ENOMEM);

	mux->reg = base + mc->mux_reg;
	mux->mask = BIT(mc->mux_width) - 1;
	mux->shift = mc->mux_shift;
	mux->lock = lock;

	mux_hw = &mux->hw;
	mux_ops = &clk_mux_ops;

	parent_names = mc->parent_names;
	num_parents = mc->num_parents;
	} else {
	parent = mc->parent;
	parent_names = &parent;
	num_parents = 1;
	}

	if (mc->gate_shift >= 0) {
	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
	if (!gate) {
	ret = -ENOMEM;
	goto err_out;
	}

	gate->reg = base + mc->gate_reg;
	gate->bit_idx = mc->gate_shift;
	gate->flags = CLK_GATE_SET_TO_DISABLE;
	gate->lock = lock;

	gate_hw = &gate->hw;
	gate_ops = &clk_gate_ops;
	}

	if (mc->divider_shift >= 0) {
	div = kzalloc(sizeof(*div), GFP_KERNEL);
	if (!div) {
	ret = -ENOMEM;
	goto err_out;
	}

	div->reg = base + mc->divider_reg;
	div->shift = mc->divider_shift;
	div->width = mc->divider_width;
	div->lock = lock;

	div_hw = &div->hw;
	div_ops = &clk_divider_ops;
	}

	clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
	mux_hw, mux_ops,
	div_hw, div_ops,
	gate_hw, gate_ops,
	mc->flags);

	if (IS_ERR(clk)) {
	ret = PTR_ERR(clk);
	goto err_out;
	}

	return clk;
	err_out:
	kfree(div);
	kfree(gate);
	kfree(mux);

	return ERR_PTR(ret);
	}

	void mtk_clk_register_composites(const struct mtk_composite *mcs,
	int num, void __iomem base, spinlock_t lock,
	struct clk_onecell_data *clk_data)
	{
	struct clk *clk;
	int i;

	for (i = 0; i < num; i++) {
	const struct mtk_composite *mc = &mcs[i];

	if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[mc->id]))
	continue;

	clk = mtk_clk_register_composite(mc, base, lock);

	if (IS_ERR(clk)) {
	pr_err("Failed to register clk %s: %ld\n",
	mc->name, PTR_ERR(clk));
	continue;
	}

	if (clk_data)
	clk_data->clks[mc->id] = clk;
	}
	}

	void mtk_clk_register_dividers(const struct mtk_clk_divider *mcds,
	int num, void __iomem base, spinlock_t lock,
	struct clk_onecell_data *clk_data)
	{
	struct clk *clk;
	int i;

	for (i = 0; i < num; i++) {
	const struct mtk_clk_divider *mcd = &mcds[i];

	if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[mcd->id]))
	continue;

	clk = clk_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(clk)) {
	pr_err("Failed to register clk %s: %ld\n",
	mcd->name, PTR_ERR(clk));
	continue;
	}

	if (clk_data)
	clk_data->clks[mcd->id] = clk;
	}
	}