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authorMans Rullgard <mans@mansr.com>2016-01-09 12:45:10 +0000
committerHans-Christian Egtvedt <egtvedt@samfundet.no>2016-01-14 13:40:13 +0100
commit74843787158e9dff249f0528e7d4806102cc2c26 (patch)
treec5a8b3c384392ac82867c4883c6e8df37152190e /arch/avr32/mach-at32ap
parenta193f07d1e3cda30513914b1e88967419a9dbd8c (diff)
downloadlinux-74843787158e9dff249f0528e7d4806102cc2c26.tar.gz
mmc: atmel-mci: restore dma on AVR32
Commit ecb89f2f5f3e7 ("mmc: atmel-mci: remove compat for non DT board when requesting dma chan") broke dma on AVR32 and any other boards not using DT. This restores a fallback mechanism for such cases. Signed-off-by: Mans Rullgard <mans@mansr.com> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'arch/avr32/mach-at32ap')
-rw-r--r--arch/avr32/mach-at32ap/at32ap700x.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index b4cb3bd..6e90617 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -1321,6 +1321,21 @@ static struct clk atmel_mci0_pclk = {
.index = 9,
};
+static bool at32_mci_dma_filter(struct dma_chan *chan, void *pdata)
+{
+ struct mci_dma_data *sl = pdata;
+
+ if (!sl)
+ return false;
+
+ if (find_slave_dev(sl) == chan->device->dev) {
+ chan->private = slave_data_ptr(sl);
+ return true;
+ }
+
+ return false;
+}
+
struct platform_device *__init
at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
{
@@ -1355,6 +1370,7 @@ at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
slave->sdata.dst_master = 0;
data->dma_slave = slave;
+ data->dma_filter = at32_mci_dma_filter;
if (platform_device_add_data(pdev, data,
sizeof(struct mci_platform_data)))