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78 lines
1.8 KiB
78 lines
1.8 KiB
// 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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