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mmc: nuvoton: Add NPCM7xx mmc driver

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Add Nuvoton BMC NPCM750 mmc control driver.

Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Jim Liu 2022-05-24 16:55:33 +08:00 committed by Jaehoon Chung
parent 6dcf1c28dd
commit 3363a73ddf
3 changed files with 99 additions and 0 deletions
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12
drivers/mmc/Kconfig
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@ -618,6 +618,18 @@ config MMC_SDHCI_MV
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

1
drivers/mmc/Makefile
View file

@ -66,6 +66,7 @@ obj-$(CONFIG_MMC_SDHCI_IPROC) += iproc_sdhci.o
obj-$(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

86
drivers/mmc/npcm_sdhci.c Normal file
View file

@ -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),
};