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
  13 struct aspeed_sdhci_plat {
  14         struct mmc_config cfg;
  15         struct mmc mmc;
  16 };
  17
  18 static int aspeed_sdhci_probe(struct udevice *dev)
  19 {
  20         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  21         struct aspeed_sdhci_plat *plat = dev_get_platdata(dev);
  22         struct sdhci_host *host = dev_get_priv(dev);
  23         u32 max_clk;
  24         struct clk clk;
  25         int ret;
  26
  27         ret = clk_get_by_index(dev, 0, &clk);
  28         if (ret)
  29                 return ret;
  30
  31         ret = clk_enable(&clk);
  32         if (ret)
  33                 goto free;
  34
  35         host->name = dev->name;
  36         host->ioaddr = (void *)devfdt_get_addr(dev);
  37
  38         max_clk = clk_get_rate(&clk);
  39         if (IS_ERR_VALUE(max_clk)) {
  40                 ret = max_clk;
  41                 goto err;
  42         }
  43
  44         host->max_clk = max_clk;
  45         host->mmc = &plat->mmc;
  46         host->mmc->dev = dev;
  47         host->mmc->priv = host;
  48         upriv->mmc = host->mmc;
  49
  50         ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
  51         if (ret)
  52                 goto err;
  53
  54         ret = sdhci_probe(dev);
  55         if (ret)
  56                 goto err;
  57
  58         return 0;
  59
  60 err:
  61         clk_disable(&clk);
  62 free:
  63         clk_free(&clk);
  64         return ret;
  65 }
  66
  67 static int aspeed_sdhci_bind(struct udevice *dev)
  68 {
  69         struct aspeed_sdhci_plat *plat = dev_get_platdata(dev);
  70
  71         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
  72 }
  73
  74 static const struct udevice_id aspeed_sdhci_ids[] = {
  75         { .compatible = "aspeed,ast2400-sdhci" },
  76         { .compatible = "aspeed,ast2500-sdhci" },
  77         { .compatible = "aspeed,ast2600-sdhci" },
  78         { }
  79 };
  80
  81 U_BOOT_DRIVER(aspeed_sdhci_drv) = {
  82         .name           = "aspeed_sdhci",
  83         .id             = UCLASS_MMC,
  84         .of_match       = aspeed_sdhci_ids,
  85         .ops            = &sdhci_ops,
  86         .bind           = aspeed_sdhci_bind,
  87         .probe          = aspeed_sdhci_probe,
  88         .priv_auto_alloc_size = sizeof(struct sdhci_host),
  89         .platdata_auto_alloc_size = sizeof(struct aspeed_sdhci_plat),
  90 };