To prevent common programming errors, add a function to enable
interrupts correctly. Also keeps calling code more readable.
Signed-off-by: Joel Fernandes <joelf@xxxxxx>
---
arch/arm/common/edma.c | 15 +++++++++++++++
include/linux/platform_data/edma.h | 1 +
2 files changed, 16 insertions(+)
diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index 6433b6c..aa43c49 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -1095,6 +1095,21 @@ void edma_set_transfer_params(unsigned slot,
EXPORT_SYMBOL(edma_set_transfer_params);
/**
+ * edma_enable_interrupt - enable interrupt on parameter RAM slot
+ * @slot: parameter RAM slot which is the link target
+ *
+ * The originating slot should not be part of any active DMA transfer.
+ */
+void edma_enable_interrupt(unsigned slot)
+{
+ pr_debug("Enabling interrupt on slot %d\n", slot);
+
+ edma_parm_modify(EDMA_CTLR(slot), PARM_OPT, EDMA_CHAN_SLOT(slot),
+ ~TCINTEN, TCINTEN);
+}
+EXPORT_SYMBOL(edma_enable_interrupt);
+
+/**
* edma_link - link one parameter RAM slot to another
* @from: parameter RAM slot originating the link
* @to: parameter RAM slot which is the link target
diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h
index 57300fd..184ff5f 100644
--- a/include/linux/platform_data/edma.h
+++ b/include/linux/platform_data/edma.h
@@ -136,6 +136,7 @@ void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx);
void edma_set_transfer_params(unsigned slot, u16 acnt, u16 bcnt, u16 ccnt,
u16 bcnt_rld, enum sync_dimension sync_mode);
void edma_link(unsigned from, unsigned to);
+void edma_enable_interrupt(unsigned slot);
void edma_unlink(unsigned from);
/* calls that operate on an entire parameter RAM slot */
--
1.7.9.5
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