linux-kernel - [PATCH 17/18] DMAENGINE: ste_dma40: support disabling physical channels

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Date:	Tue, 1 Jun 2010 14:22:44 +0200
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	<linux-kernel@...r.kernel.org>,
	Jonas Aaberg <jonas.aberg@...ricsson.com>,
	Linus Walleij <linus.walleij@...ricsson.com>
Subject: [PATCH 17/18] DMAENGINE: ste_dma40: support disabling physical channels

From: Jonas Aaberg <jonas.aberg@...ricsson.com>

This makes it possible to disable physical channels.

Signed-off-by: Jonas Aaberg <jonas.aberg@...ricsson.com>
Signed-off-by: Linus Walleij <linus.walleij@...ricsson.com>
---
 drivers/dma/ste_dma40.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 5cde3c3..0829ddb 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2236,6 +2236,14 @@ static int __init d40_phy_res_init(struct d40_base *base)
 		}
 		spin_lock_init(&base->phy_res[i].lock);
 	}
+
+	/* Mark disabled channels as occupied */
+	for (i = 0; base->plat_data->disabled_channels[i] != -1; i++) {
+			base->phy_res[i].allocated_src = D40_ALLOC_PHY;
+			base->phy_res[i].allocated_dst = D40_ALLOC_PHY;
+			num_phy_chans_avail--;
+	}
+
 	dev_info(base->dev, "%d of %d physical DMA channels available\n",
 		 num_phy_chans_avail, base->num_phy_chans);
 
-- 
1.6.3.3

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