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authorRobert Jarzmik <robert.jarzmik@free.fr>2015-02-14 23:38:39 +0100
committerRobert Jarzmik <robert.jarzmik@free.fr>2015-07-18 12:16:33 +0200
commit4be0856fa34ef3b0681aeec669e50c13e394f145 (patch)
tree76bd16b3ba03eaac9bab6fa284e40215d62781be /arch/arm/plat-pxa/include/plat
parentd770e558e21961ad6cfdf0ff7df0eb5d7d4f0754 (diff)
downloadlinux-4be0856fa34ef3b0681aeec669e50c13e394f145.tar.bz2
ARM: pxa: transition to dmaengine phase 1
In order to slowly transition pxa to dmaengine, the legacy code will now rely on dmaengine to request a channel. This implies that PXA architecture selects DMADEVICES and PXA_DMA, which is not pretty. Yet it enables PXA drivers to be ported one by one, with part of them using dmaengine, and the other part using the legacy code. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Diffstat (limited to 'arch/arm/plat-pxa/include/plat')
-rw-r--r--arch/arm/plat-pxa/include/plat/dma.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/plat-pxa/include/plat/dma.h b/arch/arm/plat-pxa/include/plat/dma.h
index a7b91dc06852..28848b344e2d 100644
--- a/arch/arm/plat-pxa/include/plat/dma.h
+++ b/arch/arm/plat-pxa/include/plat/dma.h
@@ -82,4 +82,19 @@ int pxa_request_dma (char *name,
void pxa_free_dma (int dma_ch);
+/*
+ * Cooperation with pxa_dma + dmaengine while there remains at least one pxa
+ * driver not converted to dmaengine.
+ */
+#if defined(CONFIG_PXA_DMA)
+extern int pxad_toggle_reserved_channel(int legacy_channel);
+#else
+static inline int pxad_toggle_reserved_channel(int legacy_channel)
+{
+ return 0;
+}
+#endif
+
+extern void __init pxa2xx_set_dmac_info(int nb_channels);
+
#endif /* __PLAT_DMA_H */