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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2024 Collabora Ltd.
* Author: Sebastian Reichel <sebastian.reichel@collabora.com>
*/
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/pm_clock.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include "clk.h"
static int rk_clk_gate_link_register(struct device *dev,
struct rockchip_clk_provider *ctx,
struct rockchip_clk_branch *clkbr)
{
unsigned long flags = clkbr->flags | CLK_SET_RATE_PARENT;
struct clk *clk;
clk = clk_register_gate(dev, clkbr->name, clkbr->parent_names[0],
flags, ctx->reg_base + clkbr->gate_offset,
clkbr->gate_shift, clkbr->gate_flags,
&ctx->lock);
if (IS_ERR(clk))
return PTR_ERR(clk);
rockchip_clk_set_lookup(ctx, clk, clkbr->id);
return 0;
}
static int rk_clk_gate_link_probe(struct platform_device *pdev)
{
struct rockchip_gate_link_platdata *pdata;
struct device *dev = &pdev->dev;
struct clk *linked_clk;
int ret;
pdata = dev_get_platdata(dev);
if (!pdata)
return dev_err_probe(dev, -ENODEV, "missing platform data");
ret = devm_pm_runtime_enable(dev);
if (ret)
return ret;
ret = devm_pm_clk_create(dev);
if (ret)
return ret;
linked_clk = rockchip_clk_get_lookup(pdata->ctx, pdata->clkbr->linked_clk_id);
ret = pm_clk_add_clk(dev, linked_clk);
if (ret)
return ret;
ret = rk_clk_gate_link_register(dev, pdata->ctx, pdata->clkbr);
if (ret)
goto err;
return 0;
err:
pm_clk_remove_clk(dev, linked_clk);
return ret;
}
static const struct dev_pm_ops rk_clk_gate_link_pm_ops = {
SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
};
static struct platform_driver rk_clk_gate_link_driver = {
.probe = rk_clk_gate_link_probe,
.driver = {
.name = "rockchip-gate-link-clk",
.pm = &rk_clk_gate_link_pm_ops,
.suppress_bind_attrs = true,
},
};
static int __init rk_clk_gate_link_drv_register(void)
{
return platform_driver_register(&rk_clk_gate_link_driver);
}
core_initcall(rk_clk_gate_link_drv_register);
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