mmc: rtsx: add 74 Clocks in power on flow

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SD spec definition:
"Host provides at least 74 Clocks before issuing first command"
After 1ms for the voltage stable then start issuing the Clock signals

if POWER STATE is
MMC_POWER_OFF to MMC_POWER_UP to issue Clock signal to card
MMC_POWER_UP to MMC_POWER_ON to stop issuing signal to card

Signed-off-by: Ricky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/1badf10aba764191a1a752edcbf90389@realtek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Ricky WU 2022-03-02 09:43:01 +00:00 • committed by Ulf Hansson

parent a4ee79063f

commit 1f311c94aa

1 changed files with 19 additions and 10 deletions

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drivers/mmc/host/rtsx_pci_sdmmc.c

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