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mmc: Add Bouffalo Lab SDHCI driver

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Signed-off-by: Samuel Holland <samuel@sholland.org>
This commit is contained in:
Samuel Holland 2022-12-04 14:49:22 -06:00
parent 45131b584d
commit c7e587c0e8
3 changed files with 94 additions and 0 deletions
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11
drivers/mmc/Kconfig
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@ -553,6 +553,17 @@ config MMC_SDHCI_BCMSTB
If unsure, say N.
config MMC_SDHCI_BFLB
tristate "SDHCI support for the Bouffalo Lab SDH controller"
depends on MMC_SDHCI
help
This selects the Bouffalo Lab SDH controller.
If you have a Bouffalo Lab platform with SD or MMC devices,
say Y here.
If unsure, say N.
config MMC_SDHCI_CADENCE
bool "SDHCI support for the Cadence SD/SDIO/eMMC controller"
depends on BLK && DM_MMC

1
drivers/mmc/Makefile
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@ -60,6 +60,7 @@ obj-$(CONFIG_MMC_SDHCI_ASPEED) += aspeed_sdhci.o
obj-$(CONFIG_MMC_SDHCI_ATMEL) += atmel_sdhci.o
obj-$(CONFIG_MMC_SDHCI_BCM2835) += bcm2835_sdhci.o
obj-$(CONFIG_MMC_SDHCI_BCMSTB) += bcmstb_sdhci.o
obj-$(CONFIG_MMC_SDHCI_BFLB) += bflb_sdhci.o
obj-$(CONFIG_MMC_SDHCI_CADENCE) += sdhci-cadence.o
obj-$(CONFIG_MMC_SDHCI_AM654) += am654_sdhci.o
obj-$(CONFIG_MMC_SDHCI_IPROC) += iproc_sdhci.o

82
drivers/mmc/bflb_sdhci.c Normal file
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@ -0,0 +1,82 @@
// SPDX-License-Identifier: GPL-2.0+
#include <clk.h>
#include <dm.h>
#include <mmc.h>
#include <sdhci.h>
struct bflb_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
static int bflb_sdhci_bind(struct udevice *dev)
{
struct bflb_sdhci_plat *plat = dev_get_plat(dev);
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static int bflb_sdhci_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct bflb_sdhci_plat *plat = dev_get_plat(dev);
struct sdhci_host *host = dev_get_priv(dev);
struct clk clk;
int ret;
host->name = dev->name;
host->ioaddr = dev_remap_addr(dev);
if (!host->ioaddr)
return -ENOMEM;
ret = clk_get_by_index(dev, 0, &clk);
if (ret)
return ret;
ret = clk_enable(&clk);
if (ret)
return ret;
host->max_clk = clk_get_rate(&clk);
if (IS_ERR_VALUE(host->max_clk)) {
ret = host->max_clk;
goto err_clk_disable;
}
host->mmc = &plat->mmc;
host->mmc->dev = dev;
host->mmc->priv = host;
upriv->mmc = &plat->mmc;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
if (ret)
goto err_clk_disable;
ret = sdhci_probe(dev);
if (ret)
goto err_clk_disable;
return 0;
err_clk_disable:
clk_disable(&clk);
return ret;
}
static const struct udevice_id bflb_sdhci_match[] = {
{ .compatible = "bflb,bl808-sdhci" },
{ }
};
U_BOOT_DRIVER(bflb_sdhci) = {
.name = "bflb_sdhci",
.id = UCLASS_MMC,
.of_match = bflb_sdhci_match,
.bind = bflb_sdhci_bind,
.probe = bflb_sdhci_probe,
.priv_auto = sizeof(struct sdhci_host),
.plat_auto = sizeof(struct bflb_sdhci_plat),
.ops = &sdhci_ops,
};