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armv8: ls1012a: define esdhc_status_fixup for QDS board

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The LS1012AQDS board has a hardware issue. When there is no eMMC
adapter card inserted in SDHC2 adapter slot, the command inhibit
bits of eSDHC2_PRSSTAT register will never release. This would cause
below continious error messages in linux since it uses polling mode
to detect card.
"mmc1: Controller never released inhibit bit(s)."
"mmc1: Controller never released inhibit bit(s)."
"mmc1: Controller never released inhibit bit(s)."
This patch is to define esdhc_status_fixup function for QDS to
disable SDHC2 status if no eMMC adapter card is detected.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Yangbo Lu 2017-01-17 10:43:55 +08:00 committed by York Sun
parent fce1e16c55
commit 208e1ae8d1
1 changed files with 28 additions and 0 deletions
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28
board/freescale/ls1012aqds/ls1012aqds.c
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@ -121,6 +121,34 @@ int board_eth_init(bd_t *bis)
return pci_eth_init(bis);
}
int esdhc_status_fixup(void *blob, const char *compat)
{
char esdhc0_path[] = "/soc/esdhc@1560000";
char esdhc1_path[] = "/soc/esdhc@1580000";
u8 card_id;
do_fixup_by_path(blob, esdhc0_path, "status", "okay",
sizeof("okay"), 1);
/*
* The Presence Detect 2 register detects the installation
* of cards in various PCI Express or SGMII slots.
*
* STAT_PRS2[7:5]: Specifies the type of card installed in the
* SDHC2 Adapter slot. 0b111 indicates no adapter is installed.
*/
card_id = (QIXIS_READ(present2) & 0xe0) >> 5;
/* If no adapter is installed in SDHC2, disable SDHC2 */
if (card_id == 0x7)
do_fixup_by_path(blob, esdhc1_path, "status", "disabled",
sizeof("disabled"), 1);
else
do_fixup_by_path(blob, esdhc1_path, "status", "okay",
sizeof("okay"), 1);
return 0;
}
#ifdef CONFIG_OF_BOARD_SETUP
int ft_board_setup(void *blob, bd_t *bd)
{