-----Original Message----- From: york sun Sent: Thursday, December 08, 2016 12:03 AM To: Y.B. Lu; u-boot@lists.denx.de Subject: Re: [PATCH 2/2] armv8: ls1012a: define esdhc_status_fixup for QDS board
On 12/07/2016 12:34 AM, Yangbo Lu wrote:
The LS1012AQDS board has a hardware issue. When there is no eMMC adapter card inserted, the command inhibit bits of eSDHC_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 to disable eSDHC2 status if no eMMC adapter card is detected.
Signed-off-by: Yangbo Lu yangbo.lu@nxp.com
board/freescale/ls1012aqds/ls1012aqds.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/board/freescale/ls1012aqds/ls1012aqds.c b/board/freescale/ls1012aqds/ls1012aqds.c index 94440b3..a3229f7 100644 --- a/board/freescale/ls1012aqds/ls1012aqds.c +++ b/board/freescale/ls1012aqds/ls1012aqds.c @@ -121,6 +121,25 @@ 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);This controller is always "okay", isn't it?
[Lu Yangbo-B47093] Yes. Only sdhc2 has issue. I will emphasize it's sdhc2 in commit message.
- card_id = (QIXIS_READ(present2) & 0xe0) >> 5;
- if (card_id == 0x7)
Please put a comment here to explain what present2 has and what 0x7 is.
[Lu Yangbo-B47093] No problem, thanks. Will send the v2.
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);+}
York