[linux-2.6-block.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-regmap.h"
#include "reset.h"

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

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"
	21	#include "clk-regmap.h"
	22	#include "reset.h"
	23
	24	struct qcom_cc {
	25	struct qcom_reset_controller reset;
	26	struct clk_onecell_data data;
	27	struct clk *clks[];
	28	};
	29
5b6b7490 SB	30	struct regmap *
5b6b7490 SB	31	qcom_cc_map(struct platform_device pdev, const struct qcom_cc_desc desc)
49fc825f SB	32	{
	33	void __iomem *base;
	34	struct resource *res;
5b6b7490 SB	35	struct device *dev = &pdev->dev;
	36
	37	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	38	base = devm_ioremap_resource(dev, res);
	39	if (IS_ERR(base))
	40	return ERR_CAST(base);
	41
	42	return devm_regmap_init_mmio(dev, base, desc->config);
	43	}
	44	EXPORT_SYMBOL_GPL(qcom_cc_map);
	45
	46	int qcom_cc_really_probe(struct platform_device *pdev,
	47	const struct qcom_cc_desc desc, struct regmap regmap)
	48	{
49fc825f SB	49	int i, ret;
	50	struct device *dev = &pdev->dev;
	51	struct clk *clk;
	52	struct clk_onecell_data *data;
	53	struct clk **clks;
49fc825f SB	54	struct qcom_reset_controller *reset;
	55	struct qcom_cc *cc;
	56	size_t num_clks = desc->num_clks;
	57	struct clk_regmap **rclks = desc->clks;
	58
49fc825f SB	59	cc = devm_kzalloc(dev, sizeof(cc) + sizeof(clks) * num_clks,
	60	GFP_KERNEL);
	61	if (!cc)
	62	return -ENOMEM;
	63
	64	clks = cc->clks;
	65	data = &cc->data;
	66	data->clks = clks;
	67	data->clk_num = num_clks;
	68
	69	for (i = 0; i < num_clks; i++) {
9ec2749b SB	70	if (!rclks[i]) {
9ec2749b SB	71	clks[i] = ERR_PTR(-ENOENT);
49fc825f	72	continue;
9ec2749b	73	}
49fc825f SB	74	clk = devm_clk_register_regmap(dev, rclks[i]);
	75	if (IS_ERR(clk))
	76	return PTR_ERR(clk);
	77	clks[i] = clk;
	78	}
	79
	80	ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data);
	81	if (ret)
	82	return ret;
	83
	84	reset = &cc->reset;
	85	reset->rcdev.of_node = dev->of_node;
	86	reset->rcdev.ops = &qcom_reset_ops;
	87	reset->rcdev.owner = dev->driver->owner;
	88	reset->rcdev.nr_resets = desc->num_resets;
	89	reset->regmap = regmap;
	90	reset->reset_map = desc->resets;
	91	platform_set_drvdata(pdev, &reset->rcdev);
	92
	93	ret = reset_controller_register(&reset->rcdev);
	94	if (ret)
	95	of_clk_del_provider(dev->of_node);
	96
	97	return ret;
	98	}
5b6b7490 SB	99	EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
	100
	101	int qcom_cc_probe(struct platform_device pdev, const struct qcom_cc_desc desc)
	102	{
	103	struct regmap *regmap;
	104
	105	regmap = qcom_cc_map(pdev, desc);
	106	if (IS_ERR(regmap))
	107	return PTR_ERR(regmap);
	108
	109	return qcom_cc_really_probe(pdev, desc, regmap);
	110	}
49fc825f SB	111	EXPORT_SYMBOL_GPL(qcom_cc_probe);
	112
	113	void qcom_cc_remove(struct platform_device *pdev)
	114	{
	115	of_clk_del_provider(pdev->dev.of_node);
	116	reset_controller_unregister(platform_get_drvdata(pdev));
	117	}
	118	EXPORT_SYMBOL_GPL(qcom_cc_remove);