From: Colin Cross <ccross@android.com>
Date: Mon, 18 Oct 2010 22:07:30 +0000 (-0700)
Subject: spi: tegra: Use shared DMA channel
X-Git-Tag: firefly_0821_release~9833^2~151^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dca2f292ae2126db4c1e86c0eb2c74fa4e500c3c;p=firefly-linux-kernel-4.4.55.git

spi: tegra: Use shared DMA channel

To avoid running out of DMA channels, use the shared DMA channel
for all four Tegra spi controllers.

Change-Id: Iff644253cf7fae36aa2e42321a1ded35a728da4f
Signed-off-by: Colin Cross <ccross@android.com>
---

diff --git a/drivers/spi/spi_tegra.c b/drivers/spi/spi_tegra.c
index 33226408b447..842ac14f745d 100644
--- a/drivers/spi/spi_tegra.c
+++ b/drivers/spi/spi_tegra.c
@@ -530,7 +530,8 @@ static int __init spi_tegra_probe(struct platform_device *pdev)
 
 	INIT_LIST_HEAD(&tspi->queue);
 
-	tspi->rx_dma = tegra_dma_allocate_channel(TEGRA_DMA_MODE_ONESHOT);
+	tspi->rx_dma = tegra_dma_allocate_channel(TEGRA_DMA_MODE_ONESHOT |
+		TEGRA_DMA_SHARED);
 	if (!tspi->rx_dma) {
 		dev_err(&pdev->dev, "can not allocate rx dma channel\n");
 		ret = -ENODEV;