forked from mirrors/linux
889c2b7ec4
Initially, the meson clock directory only hosted 2 controllers drivers, for meson8 and gxbb. At the time, both used the same set of clock drivers so managing the dependencies was not a big concern. Since this ancient time, entropy did its job, controllers with different requirement and specific clock drivers have been added. Unfortunately, we did not do a great job at managing the dependencies between the controllers and the different clock drivers. Some drivers, such as clk-phase or vid-pll-div, are compiled even if they are useless on the target (meson8). As we are adding new controllers, we need to be able to pick a driver w/o pulling the whole thing. The patch aims to clean things up by: * providing a dedicated CONFIG_ for each clock drivers * allowing clock drivers to be compiled as a modules, if possible * stating explicitly which drivers are required by each controller. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://lkml.kernel.org/r/20190201125841.26785-5-jbrunet@baylibre.com
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
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/*
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* Copyright (c) 2018 BayLibre, SAS.
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* Author: Jerome Brunet <jbrunet@baylibre.com>
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*/
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include "clk-input.h"
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static const struct clk_ops meson_clk_no_ops = {};
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struct clk_hw *meson_clk_hw_register_input(struct device *dev,
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const char *of_name,
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const char *clk_name,
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unsigned long flags)
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{
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struct clk *parent_clk = devm_clk_get(dev, of_name);
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struct clk_init_data init;
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const char *parent_name;
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struct clk_hw *hw;
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int ret;
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if (IS_ERR(parent_clk))
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return (struct clk_hw *)parent_clk;
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hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL);
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if (!hw)
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return ERR_PTR(-ENOMEM);
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parent_name = __clk_get_name(parent_clk);
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init.name = clk_name;
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init.ops = &meson_clk_no_ops;
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init.flags = flags;
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init.parent_names = &parent_name;
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init.num_parents = 1;
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hw->init = &init;
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ret = devm_clk_hw_register(dev, hw);
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return ret ? ERR_PTR(ret) : hw;
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}
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EXPORT_SYMBOL_GPL(meson_clk_hw_register_input);
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MODULE_DESCRIPTION("Amlogic clock input helper");
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MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
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MODULE_LICENSE("GPL v2");
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