79 строки
1.8 KiB
C
79 строки
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2019 Christoph Hellwig.
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*/
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/of_platform.h>
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#include <linux/clk.h>
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#include <asm/soc.h>
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#include <soc/canaan/k210-sysctl.h>
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static int k210_sysctl_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct clk *pclk;
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int ret;
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dev_info(dev, "K210 system controller\n");
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/* Get power bus clock */
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pclk = devm_clk_get(dev, NULL);
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if (IS_ERR(pclk))
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return dev_err_probe(dev, PTR_ERR(pclk),
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"Get bus clock failed\n");
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ret = clk_prepare_enable(pclk);
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if (ret) {
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dev_err(dev, "Enable bus clock failed\n");
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return ret;
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}
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/* Populate children */
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ret = devm_of_platform_populate(dev);
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if (ret)
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dev_err(dev, "Populate platform failed %d\n", ret);
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return ret;
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}
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static const struct of_device_id k210_sysctl_of_match[] = {
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{ .compatible = "canaan,k210-sysctl", },
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{ /* sentinel */ },
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};
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static struct platform_driver k210_sysctl_driver = {
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.driver = {
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.name = "k210-sysctl",
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.of_match_table = k210_sysctl_of_match,
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},
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.probe = k210_sysctl_probe,
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};
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builtin_platform_driver(k210_sysctl_driver);
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/*
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* System controller registers base address and size.
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*/
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#define K210_SYSCTL_BASE_ADDR 0x50440000ULL
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#define K210_SYSCTL_BASE_SIZE 0x1000
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/*
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* This needs to be called very early during initialization, given that
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* PLL1 needs to be enabled to be able to use all SRAM.
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*/
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static void __init k210_soc_early_init(const void *fdt)
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{
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void __iomem *sysctl_base;
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sysctl_base = ioremap(K210_SYSCTL_BASE_ADDR, K210_SYSCTL_BASE_SIZE);
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if (!sysctl_base)
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panic("k210-sysctl: ioremap failed");
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k210_clk_early_init(sysctl_base);
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iounmap(sysctl_base);
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}
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SOC_EARLY_INIT_DECLARE(k210_soc, "canaan,kendryte-k210", k210_soc_early_init);
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