mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0e662440e9
Remove clk_table and directly use ios->clock as clock source rate. Abstract init clock rate and max clock limitation in clk.c Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by: Chris Ball <chris@printf.net>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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* Copyright (c) 2013 Linaro Ltd.
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* Copyright (c) 2013 Hisilicon Limited.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/dw_mmc.h>
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#include <linux/of_address.h>
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#include "dw_mmc.h"
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#include "dw_mmc-pltfm.h"
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static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
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{
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int ret;
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ret = clk_set_rate(host->ciu_clk, ios->clock);
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if (ret)
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dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
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host->bus_hz = clk_get_rate(host->ciu_clk);
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}
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static const struct dw_mci_drv_data k3_drv_data = {
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.set_ios = dw_mci_k3_set_ios,
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};
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static const struct of_device_id dw_mci_k3_match[] = {
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{ .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },
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{},
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};
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MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
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static int dw_mci_k3_probe(struct platform_device *pdev)
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{
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const struct dw_mci_drv_data *drv_data;
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const struct of_device_id *match;
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match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
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drv_data = match->data;
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return dw_mci_pltfm_register(pdev, drv_data);
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}
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static int dw_mci_k3_suspend(struct device *dev)
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{
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struct dw_mci *host = dev_get_drvdata(dev);
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int ret;
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ret = dw_mci_suspend(host);
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if (!ret)
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clk_disable_unprepare(host->ciu_clk);
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return ret;
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}
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static int dw_mci_k3_resume(struct device *dev)
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{
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struct dw_mci *host = dev_get_drvdata(dev);
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int ret;
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ret = clk_prepare_enable(host->ciu_clk);
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if (ret) {
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dev_err(host->dev, "failed to enable ciu clock\n");
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return ret;
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}
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return dw_mci_resume(host);
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}
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static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
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static struct platform_driver dw_mci_k3_pltfm_driver = {
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.probe = dw_mci_k3_probe,
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.remove = dw_mci_pltfm_remove,
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.driver = {
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.name = "dwmmc_k3",
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.of_match_table = dw_mci_k3_match,
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.pm = &dw_mci_k3_pmops,
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},
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};
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module_platform_driver(dw_mci_k3_pltfm_driver);
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MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:dwmmc-k3");
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