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/*
* 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/module.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"
#include "gdsc.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_hw_get_num_parents(hw);
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);
static void qcom_cc_del_clk_provider(void *data)
{
of_clk_del_provider(data);
}
static void qcom_cc_reset_unregister(void *data)
{
reset_controller_unregister(data);
}
static void qcom_cc_gdsc_unregister(void *data)
{
gdsc_unregister(data);
}
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;
devm_add_action(dev, qcom_cc_del_clk_provider, pdev->dev.of_node);
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;
ret = reset_controller_register(&reset->rcdev);
if (ret)
return ret;
devm_add_action(dev, qcom_cc_reset_unregister, &reset->rcdev);
if (desc->gdscs && desc->num_gdscs) {
ret = gdsc_register(dev, desc->gdscs, desc->num_gdscs,
&reset->rcdev, regmap);
if (ret)
return ret;
}
devm_add_action(dev, qcom_cc_gdsc_unregister, dev);
return 0;
}
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);
MODULE_LICENSE("GPL v2");
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