Hi,
Le 17/11/2017 à 10:48, Jaehoon Chung a écrit :
Hi,
On 2017년 11월 16일 21:29, Guillaume Gardet wrote:
I found a workaround. If I disable MMC_MODE_HS_52MHz, then it is working fine.
I guess there is a better way to implement the following patch ?
**********************************************************************
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 23f642980b..a6a0934eef 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -508,7 +508,8 @@ void dwmci_setup_cfg(struct mmc_config *cfg, struct
dwmci_host *host,
cfg->host_caps |= MMC_MODE_4BIT;
cfg->host_caps &= ~MMC_MODE_8BIT;
}
- cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
+ /* MMC_MODE_HS_52MHz is broken (at least) on Samsung Snow, so disbale
it for now */
+ cfg->host_caps |= MMC_MODE_HS;
It means that card is running the lower clock frequency..it's not solution.
Timing issue and some problems should be fixed with lowest frequency.
Now, i can't test and check more detail. After back to my office or home, i
will check what main cause.
Any progress on this topic ?
Guillaume
Best Regards,
Jaehoon Chung
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
}
**********************************************************************
Guillaume
Le 15/11/2017 à 11:27, Guillaume Gardet a écrit :
Le 15/11/2017 à 11:22, Guillaume Gardet a écrit :
Forgot to Cc ML. Done now.
Le 15/11/2017 à 11:14, Guillaume Gardet a écrit :
Hello,
I tested U-Boot v2017.09 on a Samsung Snow (Chromebook ARM) and while mmc0
(internal eMMC) is working fine, mmc1 (external SD slot) does not work.
I get the following error for 'mmc dev 1' command:
mmc_init: -110, time 30
Please also note that on boot (or on 1st 'mmc dev 1' cmd if I stop auto-boot),
I firstly get:
mmc_init: -5, time 39
Then, all next attempts retruns:
mmc_init: -110, time 30
Guillaume
Any idea what could be wrong?
Guillaume
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
