esp32/machine_sdcard: Free SPI bus when deiniting SD card.

dpgeorge · dpgeorge · commit d108fc9c4793 · 2022-08-30T12:54:18.000+10:00
So that everything is reset and the SD card can be created again after calling SDCard.deinit() (and after a soft reset). Fixes issue micropython#8949. Signed-off-by: Damien George <damien@micropython.org>
diff --git a/ports/esp32/machine_sdcard.c b/ports/esp32/machine_sdcard.c
@@ -283,6 +283,10 @@ STATIC mp_obj_t sd_deinit(mp_obj_t self_in) {
         {
             self->host.deinit();
         }
+        if (self->host.flags & SDMMC_HOST_FLAG_SPI) {
+            // SD card used a (dedicated) SPI bus, so free that SPI bus.
+            spi_bus_free(self->host.slot);
+        }
         self->flags &= ~SDCARD_CARD_FLAGS_HOST_INIT_DONE;
     }
 

Original file line number	Diff line number	Diff line change
`@@ -283,6 +283,10 @@ STATIC mp_obj_t sd_deinit(mp_obj_t self_in) {`
`283`	`283`	`{`
`284`	`284`	`self->host.deinit();`
`285`	`285`	`}`
	`286`	`+ if (self->host.flags & SDMMC_HOST_FLAG_SPI) {`
	`287`	`+ // SD card used a (dedicated) SPI bus, so free that SPI bus.`
	`288`	`+ spi_bus_free(self->host.slot);`
	`289`	`+ }`
`286`	`290`	`self->flags &= ~SDCARD_CARD_FLAGS_HOST_INIT_DONE;`
`287`	`291`	`}`
`288`	`292`