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33 lines
1013 B
Diff
33 lines
1013 B
Diff
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From 124d503cd4c6f5a7a877226c26139ec82c7d1282 Mon Sep 17 00:00:00 2001
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From: Matthias Reichl <hias@horus.com>
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Date: Sun, 11 Oct 2020 00:48:55 +0200
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Subject: [PATCH] bcm2835-dma: only reserve channel 0 if legacy dma
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driver is enabled
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If CONFIG_DMA_BCM2708 isn't enabled there's no need to mask out
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one of the already scarce DMA channels.
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Signed-off-by: Matthias Reichl <hias@horus.com>
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---
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drivers/dma/bcm2835-dma.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/dma/bcm2835-dma.c
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+++ b/drivers/dma/bcm2835-dma.c
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@@ -1283,6 +1283,7 @@ static int bcm2835_dma_probe(struct plat
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goto err_no_dma;
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}
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+#ifdef CONFIG_DMA_BCM2708
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/* One channel is reserved for the legacy API */
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if (chans_available & BCM2835_DMA_BULK_MASK) {
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rc = bcm_dmaman_probe(pdev, base,
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@@ -1293,6 +1294,7 @@ static int bcm2835_dma_probe(struct plat
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chans_available &= ~BCM2835_DMA_BULK_MASK;
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}
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+#endif
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/* And possibly one for the 40-bit DMA memcpy API */
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if (chans_available & od->cfg_data->chan_40bit_mask &
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