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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2023 Neil Armstrong <neil.armstrong@linaro.org>
*/
#include <linux/clk-provider.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "meson-clkc-utils.h"
struct clk_hw *meson_clk_hw_get(struct of_phandle_args *clkspec, void *clk_hw_data)
{
const struct meson_clk_hw_data *data = clk_hw_data;
unsigned int idx = clkspec->args[0];
if (idx >= data->num) {
pr_err("%s: invalid index %u\n", __func__, idx);
return ERR_PTR(-EINVAL);
}
return data->hws[idx];
}
EXPORT_SYMBOL_NS_GPL(meson_clk_hw_get, "CLK_MESON");
static int meson_clkc_init(struct device *dev, struct regmap *map)
{
const struct meson_clkc_data *data;
struct clk_hw *hw;
int ret, i;
data = of_device_get_match_data(dev);
if (!data)
return -EINVAL;
if (data->init_count)
regmap_multi_reg_write(map, data->init_regs, data->init_count);
for (i = 0; i < data->hw_clks.num; i++) {
hw = data->hw_clks.hws[i];
/* array might be sparse */
if (!hw)
continue;
ret = devm_clk_hw_register(dev, hw);
if (ret) {
dev_err(dev, "registering %s clock failed\n",
hw->init->name);
return ret;
}
}
return devm_of_clk_add_hw_provider(dev, meson_clk_hw_get, (void *)&data->hw_clks);
}
int meson_clkc_syscon_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np;
struct regmap *map;
np = of_get_parent(dev->of_node);
map = syscon_node_to_regmap(np);
of_node_put(np);
if (IS_ERR(map)) {
dev_err(dev, "failed to get parent syscon regmap\n");
return PTR_ERR(map);
}
return meson_clkc_init(dev, map);
}
EXPORT_SYMBOL_NS_GPL(meson_clkc_syscon_probe, "CLK_MESON");
int meson_clkc_mmio_probe(struct platform_device *pdev)
{
const struct meson_clkc_data *data;
struct device *dev = &pdev->dev;
struct resource *res;
void __iomem *base;
struct regmap *map;
struct regmap_config regmap_cfg = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
};
data = of_device_get_match_data(dev);
if (!data)
return -EINVAL;
base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(base))
return PTR_ERR(base);
regmap_cfg.max_register = resource_size(res) - regmap_cfg.reg_stride;
map = devm_regmap_init_mmio(dev, base, ®map_cfg);
if (IS_ERR(map))
return PTR_ERR(map);
return meson_clkc_init(dev, map);
}
EXPORT_SYMBOL_NS_GPL(meson_clkc_mmio_probe, "CLK_MESON");
MODULE_DESCRIPTION("Amlogic Clock Controller Utilities");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("CLK_MESON");
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