1 /* 2 * Copyright (c) 2013 Linaro Ltd. 3 * Copyright (c) 2013 Hisilicon Limited. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/clk.h> 14 #include <linux/mmc/host.h> 15 #include <linux/mmc/dw_mmc.h> 16 #include <linux/of_address.h> 17 18 #include "dw_mmc.h" 19 #include "dw_mmc-pltfm.h" 20 21 static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios) 22 { 23 int ret; 24 25 ret = clk_set_rate(host->ciu_clk, ios->clock); 26 if (ret) 27 dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock); 28 29 host->bus_hz = clk_get_rate(host->ciu_clk); 30 } 31 32 static const struct dw_mci_drv_data k3_drv_data = { 33 .set_ios = dw_mci_k3_set_ios, 34 }; 35 36 static const struct of_device_id dw_mci_k3_match[] = { 37 { .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, }, 38 {}, 39 }; 40 MODULE_DEVICE_TABLE(of, dw_mci_k3_match); 41 42 static int dw_mci_k3_probe(struct platform_device *pdev) 43 { 44 const struct dw_mci_drv_data *drv_data; 45 const struct of_device_id *match; 46 47 match = of_match_node(dw_mci_k3_match, pdev->dev.of_node); 48 drv_data = match->data; 49 50 return dw_mci_pltfm_register(pdev, drv_data); 51 } 52 53 static int dw_mci_k3_suspend(struct device *dev) 54 { 55 struct dw_mci *host = dev_get_drvdata(dev); 56 int ret; 57 58 ret = dw_mci_suspend(host); 59 if (!ret) 60 clk_disable_unprepare(host->ciu_clk); 61 62 return ret; 63 } 64 65 static int dw_mci_k3_resume(struct device *dev) 66 { 67 struct dw_mci *host = dev_get_drvdata(dev); 68 int ret; 69 70 ret = clk_prepare_enable(host->ciu_clk); 71 if (ret) { 72 dev_err(host->dev, "failed to enable ciu clock\n"); 73 return ret; 74 } 75 76 return dw_mci_resume(host); 77 } 78 79 static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume); 80 81 static struct platform_driver dw_mci_k3_pltfm_driver = { 82 .probe = dw_mci_k3_probe, 83 .remove = dw_mci_pltfm_remove, 84 .driver = { 85 .name = "dwmmc_k3", 86 .of_match_table = dw_mci_k3_match, 87 .pm = &dw_mci_k3_pmops, 88 }, 89 }; 90 91 module_platform_driver(dw_mci_k3_pltfm_driver); 92 93 MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension"); 94 MODULE_LICENSE("GPL v2"); 95 MODULE_ALIAS("platform:dwmmc-k3"); 96