69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019 MediaTek Inc.
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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static const struct of_device_id bring_up_id_table[] = {
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{ .compatible = "mediatek,clk-bring-up",},
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{ .compatible = "mediatek,mt8163-bring-up",},
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{ .compatible = "mediatek,mt8173-bring-up",},
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{ },
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};
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MODULE_DEVICE_TABLE(of, bring_up_id_table);
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static int bring_up_probe(struct platform_device *pdev)
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{
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struct clk *clk;
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int clk_con, i;
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int ret = 0;
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clk_con = of_count_phandle_with_args(pdev->dev.of_node, "clocks",
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"#clock-cells");
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pr_notice("sum: %d\n", clk_con);
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for (i = 0; i < clk_con; i++) {
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clk = of_clk_get(pdev->dev.of_node, i);
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if (IS_ERR(clk)) {
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long ret = PTR_ERR(clk);
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if (ret == -EPROBE_DEFER)
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pr_notice("clk %d is not ready\n", i);
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else
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pr_notice("get clk %d fail, ret=%d, clk_con=%d\n",
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i, (int)ret, clk_con);
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} else {
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pr_notice("get clk [%d]: %s ok\n", i,
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__clk_get_name(clk));
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ret = clk_prepare_enable(clk);
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if (ret) {
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pr_err("cannot force-on bringup clk node\n");
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}
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}
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}
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return ret;
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}
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static int bring_up_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver bring_up = {
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.probe = bring_up_probe,
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.remove = bring_up_remove,
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.driver = {
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.name = "bring_up",
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.owner = THIS_MODULE,
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.of_match_table = bring_up_id_table,
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},
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};
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module_platform_driver(bring_up);
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