[mirror_ubuntu-bionic-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-regmap.h"
#include "reset.h"

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

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

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

	regmap = devm_regmap_init_mmio(dev, base, desc->config);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

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