Do you have any comments for this patch? Thanks Venkatesh
> -----Original Message----- > From: Venkatesh Yadav Abbarapu <venkatesh.abbar...@amd.com> > Sent: Tuesday, April 23, 2024 11:01 AM > To: u-boot@lists.denx.de > Cc: peng....@nxp.com; jh80.ch...@samsung.com; git (AMD-Xilinx) > <g...@amd.com> > Subject: [PATCH] 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 <venkatesh.abbar...@amd.com> > --- > drivers/mmc/mmc.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index > 7b068c71ff..a2ed99aefe 100644 > --- a/drivers/mmc/mmc.c > +++ b/drivers/mmc/mmc.c > @@ -962,8 +962,8 @@ 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 > > @@ -2043,7 +2043,7 @@ 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) > -- > 2.17.1