lkml.org 
[lkml]   [2013]   [Aug]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 05/12] ARM: edma: Add function to enable interrupt for a PaRAM slot
Date
To prevent common programming errors, add a function to enable
interrupts correctly. Also keeps calling code more readable.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
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


\
 
 \ /
  Last update: 2013-08-05 21:01    [W:0.215 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site