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/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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/clk-provider.h>
#include <linux/init.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include "clk-uniphier.h"
static struct clk_hw *uniphier_clk_register(struct device *dev,
struct regmap *regmap,
const struct uniphier_clk_data *data)
{
switch (data->type) {
case UNIPHIER_CLK_TYPE_FIXED_FACTOR:
return uniphier_clk_register_fixed_factor(dev, data->name,
&data->data.factor);
case UNIPHIER_CLK_TYPE_FIXED_RATE:
return uniphier_clk_register_fixed_rate(dev, data->name,
&data->data.rate);
case UNIPHIER_CLK_TYPE_GATE:
return uniphier_clk_register_gate(dev, regmap, data->name,
&data->data.gate);
case UNIPHIER_CLK_TYPE_MUX:
return uniphier_clk_register_mux(dev, regmap, data->name,
&data->data.mux);
default:
dev_err(dev, "unsupported clock type\n");
return ERR_PTR(-EINVAL);
}
}
static int uniphier_clk_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct clk_hw_onecell_data *hw_data;
const struct uniphier_clk_data *p, *data;
struct regmap *regmap;
struct device_node *parent;
int clk_num = 0;
data = of_device_get_match_data(dev);
if (WARN_ON(!data))
return -EINVAL;
parent = of_get_parent(dev->of_node); /* parent should be syscon node */
regmap = syscon_node_to_regmap(parent);
of_node_put(parent);
if (IS_ERR(regmap)) {
dev_err(dev, "failed to get regmap (error %ld)\n",
PTR_ERR(regmap));
return PTR_ERR(regmap);
}
for (p = data; p->name; p++)
clk_num = max(clk_num, p->idx + 1);
hw_data = devm_kzalloc(dev,
sizeof(*hw_data) + clk_num * sizeof(struct clk_hw *),
GFP_KERNEL);
if (!hw_data)
return -ENOMEM;
hw_data->num = clk_num;
/* avoid returning NULL for unused idx */
while (--clk_num >= 0)
hw_data->hws[clk_num] = ERR_PTR(-EINVAL);
for (p = data; p->name; p++) {
struct clk_hw *hw;
dev_dbg(dev, "register %s (index=%d)\n", p->name, p->idx);
hw = uniphier_clk_register(dev, regmap, p);
if (IS_ERR(hw)) {
dev_err(dev, "failed to register %s (error %ld)\n",
p->name, PTR_ERR(hw));
return PTR_ERR(hw);
}
if (p->idx >= 0)
hw_data->hws[p->idx] = hw;
}
return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
hw_data);
}
static int uniphier_clk_remove(struct platform_device *pdev)
{
of_clk_del_provider(pdev->dev.of_node);
return 0;
}
static const struct of_device_id uniphier_clk_match[] = {
/* System clock */
{
.compatible = "socionext,uniphier-sld3-clock",
.data = uniphier_sld3_sys_clk_data,
},
{
.compatible = "socionext,uniphier-ld4-clock",
.data = uniphier_ld4_sys_clk_data,
},
{
.compatible = "socionext,uniphier-pro4-clock",
.data = uniphier_pro4_sys_clk_data,
},
{
.compatible = "socionext,uniphier-sld8-clock",
.data = uniphier_sld8_sys_clk_data,
},
{
.compatible = "socionext,uniphier-pro5-clock",
.data = uniphier_pro5_sys_clk_data,
},
{
.compatible = "socionext,uniphier-pxs2-clock",
.data = uniphier_pxs2_sys_clk_data,
},
{
.compatible = "socionext,uniphier-ld11-clock",
.data = uniphier_ld11_sys_clk_data,
},
{
.compatible = "socionext,uniphier-ld20-clock",
.data = uniphier_ld20_sys_clk_data,
},
/* Media I/O clock */
{
.compatible = "socionext,uniphier-sld3-mio-clock",
.data = uniphier_sld3_mio_clk_data,
},
{
.compatible = "socionext,uniphier-ld4-mio-clock",
.data = uniphier_sld3_mio_clk_data,
},
{
.compatible = "socionext,uniphier-pro4-mio-clock",
.data = uniphier_sld3_mio_clk_data,
},
{
.compatible = "socionext,uniphier-sld8-mio-clock",
.data = uniphier_sld3_mio_clk_data,
},
{
.compatible = "socionext,uniphier-pro5-mio-clock",
.data = uniphier_pro5_mio_clk_data,
},
{
.compatible = "socionext,uniphier-pxs2-mio-clock",
.data = uniphier_pro5_mio_clk_data,
},
{
.compatible = "socionext,uniphier-ld11-mio-clock",
.data = uniphier_sld3_mio_clk_data,
},
{
.compatible = "socionext,uniphier-ld20-mio-clock",
.data = uniphier_pro5_mio_clk_data,
},
/* Peripheral clock */
{
.compatible = "socionext,uniphier-ld4-peri-clock",
.data = uniphier_ld4_peri_clk_data,
},
{
.compatible = "socionext,uniphier-pro4-peri-clock",
.data = uniphier_pro4_peri_clk_data,
},
{
.compatible = "socionext,uniphier-sld8-peri-clock",
.data = uniphier_ld4_peri_clk_data,
},
{
.compatible = "socionext,uniphier-pro5-peri-clock",
.data = uniphier_pro4_peri_clk_data,
},
{
.compatible = "socionext,uniphier-pxs2-peri-clock",
.data = uniphier_pro4_peri_clk_data,
},
{
.compatible = "socionext,uniphier-ld11-peri-clock",
.data = uniphier_pro4_peri_clk_data,
},
{
.compatible = "socionext,uniphier-ld20-peri-clock",
.data = uniphier_pro4_peri_clk_data,
},
{ /* sentinel */ }
};
static struct platform_driver uniphier_clk_driver = {
.probe = uniphier_clk_probe,
.remove = uniphier_clk_remove,
.driver = {
.name = "uniphier-clk",
.of_match_table = uniphier_clk_match,
},
};
builtin_platform_driver(uniphier_clk_driver);
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