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clk: meson8b: convert to platform_driver

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This patch creates a proper platform_driver for the meson8b clock
controller. Use of CLK_OF_DECLARE is removed, and can be added back in
later if very early registration of some clocks is required.

Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
This commit is contained in:
Michael Turquette 2016-05-11 11:11:18 -07:00
parent c0daa3e6f5
commit 796b9aa85d
1 changed files with 49 additions and 18 deletions
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67
drivers/clk/meson/meson8b-clkc.c
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@ -2,6 +2,9 @@
* Copyright (c) 2015 Endless Mobile, Inc.
* Author: Carlo Caione <carlo@endlessm.com>
*
* Copyright (c) 2016 BayLibre, Inc.
* Michael Turquette <mturquette@baylibre.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
@ -17,11 +20,10 @@
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <dt-bindings/clock/meson8b-clkc.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include "clkc.h"
@ -350,18 +352,19 @@ static struct meson_clk_pll *const meson8b_clk_plls[] = {
&meson8b_sys_pll,
};
static void __init meson8b_clkc_init(struct device_node *np)
static int meson8b_clkc_probe(struct platform_device *pdev)
{
void __iomem *clk_base;
int ret, clkid, i;
struct clk_hw *parent_hw;
struct clk *parent_clk;
struct device *dev = &pdev->dev;
/* Generic clocks and PLLs */
clk_base = of_iomap(np, 1);
clk_base = of_iomap(dev->of_node, 1);
if (!clk_base) {
pr_err("%s: Unable to map clk base\n", __func__);
return;
return -ENXIO;
}
/* Populate base address for PLLs */
@ -386,9 +389,9 @@ static void __init meson8b_clkc_init(struct device_node *np)
continue;
/* FIXME convert to devm_clk_register */
ret = clk_hw_register(NULL, meson8b_hw_onecell_data.hws[clkid]);
ret = devm_clk_hw_register(dev, meson8b_hw_onecell_data.hws[clkid]);
if (ret)
goto unregister;
goto iounmap;
}
/*
@ -411,17 +414,45 @@ static void __init meson8b_clkc_init(struct device_node *np)
if (ret) {
pr_err("%s: failed to register clock notifier for cpu_clk\n",
__func__);
goto unregister_clk_nb;
goto iounmap;
}
of_clk_add_hw_provider(np, of_clk_hw_onecell_get, &meson8b_hw_onecell_data);
return;
return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
&meson8b_hw_onecell_data);
/* FIXME remove after converting to platform_driver/devm_clk_register */
unregister_clk_nb:
clk_notifier_unregister(parent_clk, &meson8b_a5_clk.clk_nb);
unregister:
for (clkid = CLK_NR_CLKS - 1; clkid >= 0; clkid--)
clk_hw_unregister(meson8b_hw_onecell_data.hws[clkid]);
iounmap:
iounmap(clk_base);
return ret;
}
CLK_OF_DECLARE(meson8b_clock, "amlogic,meson8b-clkc", meson8b_clkc_init);
static const struct of_device_id meson8b_clkc_match_table[] = {
{ .compatible = "amlogic,meson8b-clkc" },
{ }
};
MODULE_DEVICE_TABLE(of, meson8b_match_table);
static struct platform_driver meson8b_driver = {
.probe = meson8b_clkc_probe,
.driver = {
.name = "meson8b-clkc",
.of_match_table = meson8b_clkc_match_table,
},
};
static int __init meson8b_clkc_init(void)
{
return platform_driver_register(&meson8b_driver);
}
module_init(meson8b_clkc_init);
static void __exit meson8b_clkc_exit(void)
{
platform_driver_unregister(&meson8b_driver);
}
module_exit(meson8b_clkc_exit);
MODULE_DESCRIPTION("AmLogic S805 / Meson8b Clock Controller Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:meson8b-clkc");
MODULE_AUTHOR("Michael Turquette <mturquette@baylibre.com>");
MODULE_AUTHOR("Carlo Caione <carlo@endlessm.com>");