diff options
| author | Venkatesh Yadav Abbarapu <[email protected]> | 2024-04-23 11:00:57 +0530 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2024-09-05 16:18:39 -0600 |
| commit | efddda8f03f027cf6ed0f1d7e479c87c26247822 (patch) | |
| tree | 5c356633ae28d173970694d85fc96feddf5c7c39 /drivers | |
| parent | fe11aa0b8ca34e24352fbb79c108b69fab011f6c (diff) | |
mmc: Change the frequency to MMC_HS_52 when selecting hs400
Per JESD84-B51 P47, host need to change frequency to <=52MHz
after setting HS_TIMING to 0x1, and host need to set the
8-bit DDR buswidth. Currently setting the frequency to 26MHz
and trying to switch 8-bit DDR buswidth resulting timeouts.
mmc dev 1 0
Select HS400 failed -110
switch to partitions #0, OK
mmc1(part 0) is current device
Signed-off-by: Venkatesh Yadav Abbarapu <[email protected]>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/mmc.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 0b881f11b4a..7e702c3ae85 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -997,8 +997,8 @@ static int mmc_set_card_speed(struct mmc *mmc, enum bus_mode mode, * Extended CSD. Reconfigure the controller to run at HS mode. */ if (hsdowngrade) { - mmc_select_mode(mmc, MMC_HS); - mmc_set_clock(mmc, mmc_mode2freq(mmc, MMC_HS), false); + mmc_select_mode(mmc, MMC_HS_52); + mmc_set_clock(mmc, mmc_mode2freq(mmc, MMC_HS_52), false); } #endif @@ -2077,7 +2077,7 @@ static int mmc_select_hs400(struct mmc *mmc) } /* Set back to HS */ - mmc_set_card_speed(mmc, MMC_HS, true); + mmc_set_card_speed(mmc, MMC_HS_52, true); err = mmc_hs400_prepare_ddr(mmc); if (err) |