1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/mmc/npcm_sdhci.c b/drivers/mmc/npcm_sdhci.c
new file mode 100644
index 00000000000..dff4732ea06
--- /dev/null
+++ b/drivers/mmc/npcm_sdhci.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2022 Nuvoton Technology Corp.
+ */
+
+#include <dm.h>
+#include <sdhci.h>
+#include <clk.h>
+#include <power/regulator.h>
+
+#define NPCM_SDHC_MIN_FREQ	400000
+
+struct npcm_sdhci_plat {
+	struct mmc_config cfg;
+	struct mmc mmc;
+};
+
+static int npcm_sdhci_probe(struct udevice *dev)
+{
+	struct npcm_sdhci_plat *plat = dev_get_plat(dev);
+	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+	struct sdhci_host *host = dev_get_priv(dev);
+	struct udevice *vqmmc_supply;
+	int vqmmc_uv, ret;
+	struct clk clk;
+
+	host->name = dev->name;
+	host->ioaddr = dev_read_addr_ptr(dev);
+	host->max_clk = dev_read_u32_default(dev, "clock-frequency", 0);
+
+	ret = clk_get_by_index(dev, 0, &clk);
+	if (!ret && host->max_clk) {
+		ret = clk_set_rate(&clk, host->max_clk);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
+		device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_supply);
+		vqmmc_uv = dev_read_u32_default(dev, "vqmmc-microvolt", 0);
+		/* Set IO voltage */
+		if (vqmmc_supply && vqmmc_uv)
+			regulator_set_value(vqmmc_supply, vqmmc_uv);
+	}
+
+	host->index = dev_read_u32_default(dev, "index", 0);
+	ret = mmc_of_parse(dev, &plat->cfg);
+	if (ret)
+		return ret;
+
+	host->mmc = &plat->mmc;
+	host->mmc->priv = host;
+	host->mmc->dev = dev;
+	upriv->mmc = host->mmc;
+
+	ret = sdhci_setup_cfg(&plat->cfg, host, 0, NPCM_SDHC_MIN_FREQ);
+	if (ret)
+		return ret;
+
+	return sdhci_probe(dev);
+}
+
+static int npcm_sdhci_bind(struct udevice *dev)
+{
+	struct npcm_sdhci_plat *plat = dev_get_plat(dev);
+
+	return sdhci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static const struct udevice_id npcm_mmc_ids[] = {
+	{ .compatible = "nuvoton,npcm750-sdhci" },
+	{ .compatible = "nuvoton,npcm845-sdhci" },
+	{ }
+};
+
+U_BOOT_DRIVER(npcm_sdhci_drv) = {
+	.name           = "npcm_sdhci",
+	.id             = UCLASS_MMC,
+	.of_match       = npcm_mmc_ids,
+	.ops            = &sdhci_ops,
+	.bind           = npcm_sdhci_bind,
+	.probe          = npcm_sdhci_probe,
+	.priv_auto      = sizeof(struct sdhci_host),
+	.plat_auto      = sizeof(struct npcm_sdhci_plat),
+};