diff options
Diffstat (limited to 'target/linux/ipq806x/patches-3.18/003-spi-qup-Ensure-done-detection.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-3.18/003-spi-qup-Ensure-done-detection.patch | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/target/linux/ipq806x/patches-3.18/003-spi-qup-Ensure-done-detection.patch b/target/linux/ipq806x/patches-3.18/003-spi-qup-Ensure-done-detection.patch deleted file mode 100644 index 7052227810..0000000000 --- a/target/linux/ipq806x/patches-3.18/003-spi-qup-Ensure-done-detection.patch +++ /dev/null @@ -1,56 +0,0 @@ -From 4faba89e3ffbb1c5f6232651375b9b3212b50f02 Mon Sep 17 00:00:00 2001 -From: Andy Gross <agross@codeaurora.org> -Date: Thu, 15 Jan 2015 17:56:02 -0800 -Subject: [PATCH] spi: qup: Ensure done detection - -This patch fixes an issue where a SPI transaction has completed, but the done -condition is missed. This occurs because at the time of interrupt the -MAX_INPUT_DONE_FLAG is not asserted. However, in the process of reading blocks -of data from the FIFO, the last portion of data comes in. - -The opflags read at the beginning of the irq handler no longer matches the -current opflag state. To get around this condition, the block read function -should update the opflags so that done detection is correct after the return. - -Change-Id: If109e0eeb432f96000d765c4b34dbb2269f8093f -Signed-off-by: Andy Gross <agross@codeaurora.org> ---- - drivers/spi/spi-qup.c | 12 +++++++----- - 1 file changed, 7 insertions(+), 5 deletions(-) - ---- a/drivers/spi/spi-qup.c -+++ b/drivers/spi/spi-qup.c -@@ -298,7 +298,7 @@ static void spi_qup_fifo_write(struct sp - } - - static void spi_qup_block_read(struct spi_qup *controller, -- struct spi_transfer *xfer) -+ struct spi_transfer *xfer, u32 *opflags) - { - u32 data; - u32 reads_per_blk = controller->in_blk_sz >> 2; -@@ -327,10 +327,12 @@ static void spi_qup_block_read(struct sp - - /* - * Due to extra stickiness of the QUP_OP_IN_SERVICE_FLAG during block -- * reads, it has to be cleared again at the very end -+ * reads, it has to be cleared again at the very end. However, be sure -+ * to refresh opflags value because MAX_INPUT_DONE_FLAG may now be -+ * present and this is used to determine if transaction is complete - */ -- if (readl_relaxed(controller->base + QUP_OPERATIONAL) & -- QUP_OP_MAX_INPUT_DONE_FLAG) -+ *opflags = readl_relaxed(controller->base + QUP_OPERATIONAL); -+ if (*opflags & QUP_OP_MAX_INPUT_DONE_FLAG) - writel_relaxed(QUP_OP_IN_SERVICE_FLAG, - controller->base + QUP_OPERATIONAL); - -@@ -633,7 +635,7 @@ static irqreturn_t spi_qup_qup_irq(int i - if (!controller->use_dma) { - if (opflags & QUP_OP_IN_SERVICE_FLAG) { - if (opflags & QUP_OP_IN_BLOCK_READ_REQ) -- spi_qup_block_read(controller, xfer); -+ spi_qup_block_read(controller, xfer, &opflags); - else - spi_qup_fifo_read(controller, xfer); - } |