Re: [PATCH 05/16] arm: dts: omap3pandora: Don't use DMA channels for unused SPI masters
| Newsgroups | dev.linux.lists.mfd,org.freedesktop.lists.dri-devel,org.kernel.vger.linux-devicetree |
|---|---|
| Message-ID | <[email protected]> |
> From: Grond <[email protected]> > > On the pandora, only McSPI1 (spi0) is actually used. Because the device > tree defaults in arch/arm/boot/dts/omap3.dtsi leave all of the mcspi > interfaces enabled, the DMA channels which the device tree assigns to them > cannot be used for anything else. This is a problem because OMAP3's sDMA > controller can only have 32 DMA channels configured at any one time. > > So when we try to use (for example) the McBSP subsystem (which is required > for sound) it doesn't work because we've already exhausted our available > DMA channels. > > Fix this by disabling mcspi[2-4] on the pandora device tree. > > Signed-off-by: Grond <[email protected]> > Signed-off-by: H. Nikolaus Schaller <[email protected]> Sashiko has reviewed this patch and found no issues. It looks great! -- Sashiko AI review · https://sashiko.dev/#/patchset/[email protected]?part=5