+
+#if CONFIG_IS_ENABLED(DM_MMC)
+#include <asm/arch/clock.h>
+__weak void init_clk_usdhc(u32 index)
+{
+}
+
+static int fsl_esdhc_probe(struct udevice *dev)
+{
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
+ struct fsl_esdhc_priv *priv = dev_get_priv(dev);
+#ifdef CONFIG_DM_REGULATOR
+ struct udevice *vqmmc_dev;
+#endif
+ fdt_addr_t addr;
+ unsigned int val;
+ struct mmc *mmc;
+ int ret;
+
+ addr = dev_read_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ priv->esdhc_regs = (struct fsl_esdhc *)addr;
+ priv->dev = dev;
+
+ val = dev_read_u32_default(dev, "bus-width", -1);
+ if (val == 8)
+ priv->bus_width = 8;
+ else if (val == 4)
+ priv->bus_width = 4;
+ else
+ priv->bus_width = 1;
+
+ if (dev_read_bool(dev, "non-removable")) {
+ priv->non_removable = 1;
+ } else {
+ priv->non_removable = 0;
+#ifdef CONFIG_DM_GPIO
+ gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
+ GPIOD_IS_IN);
+#endif
+ }
+
+ priv->wp_enable = 1;
+
+#ifdef CONFIG_DM_GPIO
+ ret = gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio,
+ GPIOD_IS_IN);
+ if (ret)
+ priv->wp_enable = 0;
+#endif
+
+ priv->vs18_enable = 0;
+
+#ifdef CONFIG_DM_REGULATOR
+ /*
+ * If emmc I/O has a fixed voltage at 1.8V, this must be provided,
+ * otherwise, emmc will work abnormally.
+ */
+ ret = device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_dev);
+ if (ret) {
+ dev_dbg(dev, "no vqmmc-supply\n");
+ } else {
+ ret = regulator_set_enable(vqmmc_dev, true);
+ if (ret) {
+ dev_err(dev, "fail to enable vqmmc-supply\n");
+ return ret;
+ }
+
+ if (regulator_get_value(vqmmc_dev) == 1800000)
+ priv->vs18_enable = 1;
+ }
+#endif
+
+ /*
+ * TODO:
+ * Because lack of clk driver, if SDHC clk is not enabled,
+ * need to enable it first before this driver is invoked.
+ *
+ * we use MXC_ESDHC_CLK to get clk freq.
+ * If one would like to make this function work,
+ * the aliases should be provided in dts as this:
+ *
+ * aliases {
+ * mmc0 = &usdhc1;
+ * mmc1 = &usdhc2;
+ * mmc2 = &usdhc3;
+ * mmc3 = &usdhc4;
+ * };
+ * Then if your board only supports mmc2 and mmc3, but we can
+ * correctly get the seq as 2 and 3, then let mxc_get_clock
+ * work as expected.
+ */
+
+ init_clk_usdhc(dev->seq);
+
+ priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev->seq);
+ if (priv->sdhc_clk <= 0) {
+ dev_err(dev, "Unable to get clk for %s\n", dev->name);
+ return -EINVAL;
+ }
+
+ ret = fsl_esdhc_init(priv, plat);
+ if (ret) {
+ dev_err(dev, "fsl_esdhc_init failure\n");
+ return ret;
+ }
+
+ mmc = &plat->mmc;
+ mmc->cfg = &plat->cfg;
+ mmc->dev = dev;
+ upriv->mmc = mmc;
+
+ return esdhc_init_common(priv, mmc);
+}
+
+#if CONFIG_IS_ENABLED(DM_MMC)
+static int fsl_esdhc_get_cd(struct udevice *dev)
+{
+ struct fsl_esdhc_priv *priv = dev_get_priv(dev);
+
+ return true;
+ return esdhc_getcd_common(priv);
+}
+
+static int fsl_esdhc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
+ struct fsl_esdhc_priv *priv = dev_get_priv(dev);
+
+ return esdhc_send_cmd_common(priv, &plat->mmc, cmd, data);
+}
+
+static int fsl_esdhc_set_ios(struct udevice *dev)
+{
+ struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
+ struct fsl_esdhc_priv *priv = dev_get_priv(dev);
+
+ return esdhc_set_ios_common(priv, &plat->mmc);
+}
+
+static const struct dm_mmc_ops fsl_esdhc_ops = {
+ .get_cd = fsl_esdhc_get_cd,
+ .send_cmd = fsl_esdhc_send_cmd,
+ .set_ios = fsl_esdhc_set_ios,
+};
+#endif
+
+static const struct udevice_id fsl_esdhc_ids[] = {
+ { .compatible = "fsl,imx6ul-usdhc", },
+ { .compatible = "fsl,imx6sx-usdhc", },
+ { .compatible = "fsl,imx6sl-usdhc", },
+ { .compatible = "fsl,imx6q-usdhc", },
+ { .compatible = "fsl,imx7d-usdhc", },
+ { .compatible = "fsl,imx7ulp-usdhc", },
+ { .compatible = "fsl,esdhc", },
+ { /* sentinel */ }
+};
+
+#if CONFIG_IS_ENABLED(BLK)
+static int fsl_esdhc_bind(struct udevice *dev)
+{
+ struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
+
+ return mmc_bind(dev, &plat->mmc, &plat->cfg);
+}
+#endif
+
+U_BOOT_DRIVER(fsl_esdhc) = {
+ .name = "fsl-esdhc-mmc",
+ .id = UCLASS_MMC,
+ .of_match = fsl_esdhc_ids,
+ .ops = &fsl_esdhc_ops,
+#if CONFIG_IS_ENABLED(BLK)
+ .bind = fsl_esdhc_bind,
+#endif
+ .probe = fsl_esdhc_probe,
+ .platdata_auto_alloc_size = sizeof(struct fsl_esdhc_plat),
+ .priv_auto_alloc_size = sizeof(struct fsl_esdhc_priv),
+};
+#endif