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Diffstat (limited to 'target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch')
-rw-r--r--target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch32
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch b/target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch
new file mode 100644
index 0000000000..54711a1d05
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch
@@ -0,0 +1,32 @@
+From f57ff801665b868d8607c9e872466b54982564bc Mon Sep 17 00:00:00 2001
+From: Matthew McClintock <mmcclint@codeaurora.org>
+Date: Thu, 10 Mar 2016 16:48:27 -0600
+Subject: [PATCH] spi: qup: don't re-read opflags to see if transaction is done
+ for reads
+
+For reads, we will get another interrupt so we need to handle things
+then. For writes, we can finish up now.
+
+Change-Id: I4fa95ae7bb9d78f8ba54c613b981b37d4ea81d7e
+Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
+---
+ drivers/spi/spi-qup.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
+index 45e30c7..59bc37c 100644
+--- a/drivers/spi/spi-qup.c
++++ b/drivers/spi/spi-qup.c
+@@ -569,7 +569,8 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
+ }
+
+ /* re-read opflags as flags may have changed due to actions above */
+- opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
++ if (opflags & QUP_OP_OUT_SERVICE_FLAG)
++ opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
+
+ if ((controller->rx_bytes == xfer->len &&
+ (opflags & QUP_OP_MAX_INPUT_DONE_FLAG)) || error)
+--
+2.7.2
+