mmc: nuvoton: Add NPCM7xx mmc driver
Add Nuvoton BMC NPCM750 mmc control driver.
Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 95d63b6..c5e1a1b 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -618,6 +618,18 @@
If unsure, say N.
+config MMC_SDHCI_NPCM
+ bool "SDHCI support on Nuvoton NPCM device"
+ depends on MMC_SDHCI
+ depends on DM_MMC
+ help
+ This selects the Secure Digital Host Controller Interface (SDHCI)
+ on Nuvoton NPCM device.
+
+ If you have a controller with this interface, say Y here.
+
+ If unsure, say N.
+
config MMC_SDHCI_PIC32
bool "Microchip PIC32 on-chip SDHCI support"
depends on DM_MMC && MACH_PIC32
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 7c42432..5d5104b 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -66,6 +66,7 @@
obj-$(CONFIG_MMC_SDHCI_KONA) += kona_sdhci.o
obj-$(CONFIG_MMC_SDHCI_MSM) += msm_sdhci.o
obj-$(CONFIG_MMC_SDHCI_MV) += mv_sdhci.o
+obj-$(CONFIG_MMC_SDHCI_NPCM) += npcm_sdhci.o
obj-$(CONFIG_MMC_SDHCI_PIC32) += pic32_sdhci.o
obj-$(CONFIG_MMC_SDHCI_ROCKCHIP) += rockchip_sdhci.o
obj-$(CONFIG_MMC_SDHCI_S5P) += s5p_sdhci.o
diff --git a/drivers/mmc/npcm_sdhci.c b/drivers/mmc/npcm_sdhci.c
new file mode 100644
index 0000000..7eb17cc
--- /dev/null
+++ b/drivers/mmc/npcm_sdhci.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2022 Nuvoton Technology Corp.
+ */
+
+#include <common.h>
+#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 (IS_ENABLED(CONFIG_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),
+};