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(parent: 14acea0) | patch
mmc: stm32_sdmmc2: update pwron management
authorPatrick Delaunay <patrick.delaunay@st.com>
Wed, 27 Jun 2018 08:15:33 +0000 (10:15 +0200)
committerTom Rini <trini@konsulko.com>
Thu, 19 Jul 2018 20:31:35 +0000 (16:31 -0400)
commit7d118161bbfbeb21ff2f6bf8ccc3cc0a8dd6ddc6
tree818cf8221f8ebb8175308f51f83c33f979c24014tree | snapshot
parent14acea0244e33c4522fa3ea774bb3e76fa9e4fb4commit | diff
mmc: stm32_sdmmc2: update pwron management

Correctly manage the SDMMC reset and card cycle power
to fully handle the power cycle added in the MMC uclass
and avoid issue with level-shifter with some uSDCARD.

3 states managed in driver:
  1/ reset: SDMMC disable, signal HiZ
  2/ power-cycle: SDMMC disable, signals drive to 0
  3/ power-on: SDMMC enabled

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
drivers/mmc/stm32_sdmmc2.c diff | blob | history
Domain: System / Kernel;