Ludovic Barre 8266c585f4
mmc: mmci: add hardware busy timeout feature ...
In the stm32_sdmmc variant, the datatimer is active not only during
data transfers with the DPSM, but also while waiting for the busyend
IRQs from commands having the MMC_RSP_BUSY flag set. This leads to an
incorrect IRQ being raised to signal MCI_DATATIMEOUT error, which
simply breaks the behaviour.
Address this by updating the datatimer value before sending a command
having the MMC_RSP_BUSY flag set. To inform the mmc core about the
maximum supported busy timeout, which also depends on the current
clock rate, set ->max_busy_timeout (in ms).
Signed-off-by: Ludovic Barre <ludovic.barre@st.com >
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org >
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8266c585f4