drivers/mmc/aspeed_sdhci.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2019 IBM Corp.
   4  * Eddie James <eajames@linux.ibm.com>
   5  */
   6
   7 #include <common.h>
   8 #include <clk.h>
   9 #include <dm.h>
  10 #include <malloc.h>
  11 #include <sdhci.h>
  12 #include <linux/err.h>
  13
  14 struct aspeed_sdhci_plat {
  15         struct mmc_config cfg;
  16         struct mmc mmc;
  17 };
  18
  19 static int aspeed_sdhci_probe(struct udevice *dev)
  20 {
  21         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  22         struct aspeed_sdhci_plat *plat = dev_get_plat(dev);
  23         struct sdhci_host *host = dev_get_priv(dev);
  24         u32 max_clk;
  25         struct clk clk;
  26         int ret;
  27
  28         ret = clk_get_by_index(dev, 0, &clk);
  29         if (ret)
  30                 return ret;
  31
  32         ret = clk_enable(&clk);
  33         if (ret)
  34                 goto free;
  35
  36         host->name = dev->name;
  37         host->ioaddr = dev_read_addr_ptr(dev);
  38
  39         max_clk = clk_get_rate(&clk);
  40         if (IS_ERR_VALUE(max_clk)) {
  41                 ret = max_clk;
  42                 goto err;
  43         }
  44
  45         host->max_clk = max_clk;
  46         host->mmc = &plat->mmc;
  47         host->mmc->dev = dev;
  48         host->mmc->priv = host;
  49         upriv->mmc = host->mmc;
  50
  51         ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
  52         if (ret)
  53                 goto err;
  54
  55         ret = sdhci_probe(dev);
  56         if (ret)
  57                 goto err;
  58
  59         return 0;
  60
  61 err:
  62         clk_disable(&clk);
  63 free:
  64         clk_free(&clk);
  65         return ret;
  66 }
  67
  68 static int aspeed_sdhci_bind(struct udevice *dev)
  69 {
  70         struct aspeed_sdhci_plat *plat = dev_get_plat(dev);
  71
  72         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
  73 }
  74
  75 static const struct udevice_id aspeed_sdhci_ids[] = {
  76         { .compatible = "aspeed,ast2400-sdhci" },
  77         { .compatible = "aspeed,ast2500-sdhci" },
  78         { .compatible = "aspeed,ast2600-sdhci" },
  79         { }
  80 };
  81
  82 U_BOOT_DRIVER(aspeed_sdhci_drv) = {
  83         .name           = "aspeed_sdhci",
  84         .id             = UCLASS_MMC,
  85         .of_match       = aspeed_sdhci_ids,
  86         .ops            = &sdhci_ops,
  87         .bind           = aspeed_sdhci_bind,
  88         .probe          = aspeed_sdhci_probe,
  89         .priv_auto      = sizeof(struct sdhci_host),
  90         .plat_auto      = sizeof(struct aspeed_sdhci_plat),
  91 };