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arm: mvebu: Espressobin: Disable slot when emmc is not present

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This change extends previous commit 061c6d1b23 ("arm: mvebu: Espressobin:
Detect presence of emmc at runtime") and when emmc is not present then emmc
is removed from U-Boot DM and corresponding slot is disabled. Therefore on
Espressobin board without soldered emmc, state of emmc hw should be same as
if emmc was disabled in DTS.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár
2020-12-21 11:09:10 +01:00
committed by Stefan Roese
parent 9c690314db
commit 9d716339fb
2 changed files with 31 additions and 3 deletions
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19
drivers/mmc/xenon_sdhci.c
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@@ -338,6 +338,16 @@ static void xenon_mmc_enable_slot(struct sdhci_host *host, u8 slot)
sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
}
/* Disable specific slot */
static void xenon_mmc_disable_slot(struct sdhci_host *host, u8 slot)
{
u32 var;
var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
var &= ~(SLOT_MASK(slot) << SLOT_ENABLE_SHIFT);
sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
}
/* Enable Parallel Transfer Mode */
static void xenon_mmc_enable_parallel_tran(struct sdhci_host *host, u8 slot)
{
@@ -503,6 +513,14 @@ static int xenon_sdhci_probe(struct udevice *dev)
return ret;
}
static int xenon_sdhci_remove(struct udevice *dev)
{
struct sdhci_host *host = dev_get_priv(dev);
xenon_mmc_disable_slot(host, XENON_MMC_SLOT_ID_HYPERION);
return 0;
}
static int xenon_sdhci_of_to_plat(struct udevice *dev)
{
struct sdhci_host *host = dev_get_priv(dev);
@@ -552,6 +570,7 @@ U_BOOT_DRIVER(xenon_sdhci_drv) = {
.ops = &sdhci_ops,
.bind = xenon_sdhci_bind,
.probe = xenon_sdhci_probe,
.remove = xenon_sdhci_remove,
.priv_auto = sizeof(struct xenon_sdhci_priv),
.plat_auto = sizeof(struct xenon_sdhci_plat),
};