[mirror_ubuntu-artful-kernel.git] / drivers / clk / qcom / common.c

/*
 * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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/export.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/clk-provider.h>
#include <linux/reset-controller.h>

#include "common.h"
#include "clk-rcg.h"
#include "clk-regmap.h"
#include "reset.h"

struct qcom_cc {
	struct qcom_reset_controller reset;
	struct clk_onecell_data data;
	struct clk *clks[];
};

const
struct freq_tbl *qcom_find_freq(const struct freq_tbl *f, unsigned long rate)
{
	if (!f)
		return NULL;

	for (; f->freq; f++)
		if (rate <= f->freq)
			return f;

	/* Default to our fastest rate */
	return f - 1;
}
EXPORT_SYMBOL_GPL(qcom_find_freq);

int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map, u8 src)
{
	int i, num_parents = __clk_get_num_parents(hw->clk);

	for (i = 0; i < num_parents; i++)
		if (src == map[i].src)
			return i;

	return -ENOENT;
}
EXPORT_SYMBOL_GPL(qcom_find_src_index);

struct regmap *
qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
{
	void __iomem *base;
	struct resource *res;
	struct device *dev = &pdev->dev;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
		return ERR_CAST(base);

	return devm_regmap_init_mmio(dev, base, desc->config);
}
EXPORT_SYMBOL_GPL(qcom_cc_map);

int qcom_cc_really_probe(struct platform_device *pdev,
			 const struct qcom_cc_desc *desc, struct regmap *regmap)
{
	int i, ret;
	struct device *dev = &pdev->dev;
	struct clk *clk;
	struct clk_onecell_data *data;
	struct clk **clks;
	struct qcom_reset_controller *reset;
	struct qcom_cc *cc;
	size_t num_clks = desc->num_clks;
	struct clk_regmap **rclks = desc->clks;

	cc = devm_kzalloc(dev, sizeof(*cc) + sizeof(*clks) * num_clks,
			  GFP_KERNEL);
	if (!cc)
		return -ENOMEM;

	clks = cc->clks;
	data = &cc->data;
	data->clks = clks;
	data->clk_num = num_clks;

	for (i = 0; i < num_clks; i++) {
		if (!rclks[i]) {
			clks[i] = ERR_PTR(-ENOENT);
			continue;
		}
		clk = devm_clk_register_regmap(dev, rclks[i]);
		if (IS_ERR(clk))
			return PTR_ERR(clk);
		clks[i] = clk;
	}

	ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data);
	if (ret)
		return ret;

	reset = &cc->reset;
	reset->rcdev.of_node = dev->of_node;
	reset->rcdev.ops = &qcom_reset_ops;
	reset->rcdev.owner = dev->driver->owner;
	reset->rcdev.nr_resets = desc->num_resets;
	reset->regmap = regmap;
	reset->reset_map = desc->resets;
	platform_set_drvdata(pdev, &reset->rcdev);

	ret = reset_controller_register(&reset->rcdev);
	if (ret)
		of_clk_del_provider(dev->of_node);

	return ret;
}
EXPORT_SYMBOL_GPL(qcom_cc_really_probe);

int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
{
	struct regmap *regmap;

	regmap = qcom_cc_map(pdev, desc);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	return qcom_cc_really_probe(pdev, desc, regmap);
}
EXPORT_SYMBOL_GPL(qcom_cc_probe);

void qcom_cc_remove(struct platform_device *pdev)
{
	of_clk_del_provider(pdev->dev.of_node);
	reset_controller_unregister(platform_get_drvdata(pdev));
}
EXPORT_SYMBOL_GPL(qcom_cc_remove);
Commit	Line	Data
49fc825f SB	1	/*
	2	* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
	3	*
	4	* This software is licensed under the terms of the GNU General Public
	5	* License version 2, as published by the Free Software Foundation, and
	6	* may be copied, distributed, and modified under those terms.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*/
	13
	14	#include <linux/export.h>
	15	#include <linux/regmap.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/clk-provider.h>
	18	#include <linux/reset-controller.h>
	19
	20	#include "common.h"
50c6a503	21	#include "clk-rcg.h"
49fc825f SB	22	#include "clk-regmap.h"
	23	#include "reset.h"
	24
	25	struct qcom_cc {
	26	struct qcom_reset_controller reset;
	27	struct clk_onecell_data data;
	28	struct clk *clks[];
	29	};
	30
50c6a503 SB	31	const
	32	struct freq_tbl qcom_find_freq(const struct freq_tbl f, unsigned long rate)
	33	{
	34	if (!f)
	35	return NULL;
	36
	37	for (; f->freq; f++)
	38	if (rate <= f->freq)
	39	return f;
	40
	41	/* Default to our fastest rate */
	42	return f - 1;
	43	}
	44	EXPORT_SYMBOL_GPL(qcom_find_freq);
	45
293d2e97 GD	46	int qcom_find_src_index(struct clk_hw hw, const struct parent_map map, u8 src)
	47	{
	48	int i, num_parents = __clk_get_num_parents(hw->clk);
	49
	50	for (i = 0; i < num_parents; i++)
	51	if (src == map[i].src)
	52	return i;
	53
	54	return -ENOENT;
	55	}
	56	EXPORT_SYMBOL_GPL(qcom_find_src_index);
	57
5b6b7490 SB	58	struct regmap *
5b6b7490 SB	59	qcom_cc_map(struct platform_device pdev, const struct qcom_cc_desc desc)
49fc825f SB	60	{
	61	void __iomem *base;
	62	struct resource *res;
5b6b7490 SB	63	struct device *dev = &pdev->dev;
	64
	65	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	66	base = devm_ioremap_resource(dev, res);
	67	if (IS_ERR(base))
	68	return ERR_CAST(base);
	69
	70	return devm_regmap_init_mmio(dev, base, desc->config);
	71	}
	72	EXPORT_SYMBOL_GPL(qcom_cc_map);
	73
	74	int qcom_cc_really_probe(struct platform_device *pdev,
	75	const struct qcom_cc_desc desc, struct regmap regmap)
	76	{
49fc825f SB	77	int i, ret;
	78	struct device *dev = &pdev->dev;
	79	struct clk *clk;
	80	struct clk_onecell_data *data;
	81	struct clk **clks;
49fc825f SB	82	struct qcom_reset_controller *reset;
	83	struct qcom_cc *cc;
	84	size_t num_clks = desc->num_clks;
	85	struct clk_regmap **rclks = desc->clks;
	86
49fc825f SB	87	cc = devm_kzalloc(dev, sizeof(cc) + sizeof(clks) * num_clks,
	88	GFP_KERNEL);
	89	if (!cc)
	90	return -ENOMEM;
	91
	92	clks = cc->clks;
	93	data = &cc->data;
	94	data->clks = clks;
	95	data->clk_num = num_clks;
	96
	97	for (i = 0; i < num_clks; i++) {
9ec2749b SB	98	if (!rclks[i]) {
9ec2749b SB	99	clks[i] = ERR_PTR(-ENOENT);
49fc825f	100	continue;
9ec2749b	101	}
49fc825f SB	102	clk = devm_clk_register_regmap(dev, rclks[i]);
	103	if (IS_ERR(clk))
	104	return PTR_ERR(clk);
	105	clks[i] = clk;
	106	}
	107
	108	ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data);
	109	if (ret)
	110	return ret;
	111
	112	reset = &cc->reset;
	113	reset->rcdev.of_node = dev->of_node;
	114	reset->rcdev.ops = &qcom_reset_ops;
	115	reset->rcdev.owner = dev->driver->owner;
	116	reset->rcdev.nr_resets = desc->num_resets;
	117	reset->regmap = regmap;
	118	reset->reset_map = desc->resets;
	119	platform_set_drvdata(pdev, &reset->rcdev);
	120
	121	ret = reset_controller_register(&reset->rcdev);
	122	if (ret)
	123	of_clk_del_provider(dev->of_node);
	124
	125	return ret;
	126	}
5b6b7490 SB	127	EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
	128
	129	int qcom_cc_probe(struct platform_device pdev, const struct qcom_cc_desc desc)
	130	{
	131	struct regmap *regmap;
	132
	133	regmap = qcom_cc_map(pdev, desc);
	134	if (IS_ERR(regmap))
	135	return PTR_ERR(regmap);
	136
	137	return qcom_cc_really_probe(pdev, desc, regmap);
	138	}
49fc825f SB	139	EXPORT_SYMBOL_GPL(qcom_cc_probe);
	140
	141	void qcom_cc_remove(struct platform_device *pdev)
	142	{
	143	of_clk_del_provider(pdev->dev.of_node);
	144	reset_controller_unregister(platform_get_drvdata(pdev));
	145	}
	146	EXPORT_SYMBOL_GPL(qcom_cc_remove);