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Gregory Nutt 2015-01-08 06:30:37 -06:00
parent 1842525cc2
commit 1b01114652
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@ -9372,3 +9372,15 @@
* arch/arm/src/tiva/tiva_irq.c: Fix Tiva IRQ control logic; was limited
to only 64 IRQs. That is a problem for higher numbered IRQs on many
platforms (2015-01-06).
* arch/arm/src/stm32/stm32_sdio.c, drivers/mmcsd/mmcsd_sdio.c and Kconfig,
and include/nuttx/sdio.h: MMCSD SDIO: Add support for a new
SDWAIT_WRCOMPLETE condition. The previous logic used a busy-wait loop
to pool the car d R1 start to determine when the card was ready for
the next transfer. That busy-wait can be quite long -- up to hundreds
of milliseconds. And alternative is to look the the SD D0 pin which
will change state when the card is no longer busy. This change avoids
the busy-wait poll by reconfiguring the SD D0 pin as a GPIO interrupt,
then waiting for the card to become ready without taking up CPU
cycles. This change is conditioned on CONFIG_MMCSD_SDIOWATI_WRCOMPLETE
and is currently only implemented for the STM32 SDIO driver. From
David Sidrane (2015-01-08).