1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for Synopsys DesignWare Cores Mobile Storage Host Controller
5 * Copyright (C) 2018 Synaptics Incorporated
7 * Author: Jisheng Zhang <jszhang@kernel.org>
10 #include <linux/clk.h>
11 #include <linux/module.h>
14 #include "sdhci-pltfm.h"
20 static const struct sdhci_ops sdhci_dwcmshc_ops = {
21 .set_clock = sdhci_set_clock,
22 .set_bus_width = sdhci_set_bus_width,
23 .set_uhs_signaling = sdhci_set_uhs_signaling,
24 .get_max_clock = sdhci_pltfm_clk_get_max_clock,
28 static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = {
29 .ops = &sdhci_dwcmshc_ops,
30 .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
31 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
34 static int dwcmshc_probe(struct platform_device *pdev)
36 struct sdhci_pltfm_host *pltfm_host;
37 struct sdhci_host *host;
38 struct dwcmshc_priv *priv;
41 host = sdhci_pltfm_init(pdev, &sdhci_dwcmshc_pdata,
42 sizeof(struct dwcmshc_priv));
46 pltfm_host = sdhci_priv(host);
47 priv = sdhci_pltfm_priv(pltfm_host);
49 pltfm_host->clk = devm_clk_get(&pdev->dev, "core");
50 if (IS_ERR(pltfm_host->clk)) {
51 err = PTR_ERR(pltfm_host->clk);
52 dev_err(&pdev->dev, "failed to get core clk: %d\n", err);
55 err = clk_prepare_enable(pltfm_host->clk);
59 priv->bus_clk = devm_clk_get(&pdev->dev, "bus");
60 if (!IS_ERR(priv->bus_clk))
61 clk_prepare_enable(priv->bus_clk);
63 err = mmc_of_parse(host->mmc);
67 sdhci_get_of_property(pdev);
69 err = sdhci_add_host(host);
76 clk_disable_unprepare(pltfm_host->clk);
77 clk_disable_unprepare(priv->bus_clk);
79 sdhci_pltfm_free(pdev);
83 static int dwcmshc_remove(struct platform_device *pdev)
85 struct sdhci_host *host = platform_get_drvdata(pdev);
86 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
87 struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
89 sdhci_remove_host(host, 0);
91 clk_disable_unprepare(pltfm_host->clk);
92 clk_disable_unprepare(priv->bus_clk);
94 sdhci_pltfm_free(pdev);
99 static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
100 { .compatible = "snps,dwcmshc-sdhci" },
103 MODULE_DEVICE_TABLE(of, sdhci_dwcmshc_dt_ids);
105 static struct platform_driver sdhci_dwcmshc_driver = {
107 .name = "sdhci-dwcmshc",
108 .of_match_table = sdhci_dwcmshc_dt_ids,
110 .probe = dwcmshc_probe,
111 .remove = dwcmshc_remove,
113 module_platform_driver(sdhci_dwcmshc_driver);
115 MODULE_DESCRIPTION("SDHCI platform driver for Synopsys DWC MSHC");
116 MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>");
117 MODULE_LICENSE("GPL v2");