From a5af879a9565abd8a8cf0cda96a0ef7d17c81b8e Mon Sep 17 00:00:00 2001
From: Clark Wang <xiaoning.wang@nxp.com>
Date: Fri, 15 Mar 2019 13:05:22 +0800
Subject: [PATCH] MLK-21153-1 spi: lpspi: fix the dataloss when slave is in PIO
mode
Related issues have been fixed by (e0e542aeb46a MLK-20060-1 spi: lpspi:
fix wrong transmission when don't use CONT). However, the delay between
sending and receiving in slave mode. This causes the value of
FSR_RXCOUNT cannot reflect whether there is still data not sent timely.
So do this judgement by FSR_TXCOUNT.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
(cherry picked from commit 1a260d13aa3724b9919a2d8e2f53b4ad26ccf372)
---
drivers/spi/spi-fsl-lpspi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c
index 8d29fc13632c92..89262d447d293e 100644
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -77,6 +77,7 @@
#define CFGR1_NOSTALL BIT(3)
#define CFGR1_MASTER BIT(0)
#define FSR_RXCOUNT (0xFF << 16)
+#define FSR_TXCOUNT (0xFF)
#define RSR_RXEMPTY BIT(1)
#define TCR_CPOL BIT(31)
#define TCR_CPHA BIT(30)
@@ -758,7 +759,7 @@ static irqreturn_t fsl_lpspi_isr(int irq, void *dev_id)
}
if (temp_SR & SR_MBF ||
- readl(fsl_lpspi->base + IMX7ULP_FSR) & FSR_RXCOUNT) {
+ readl(fsl_lpspi->base + IMX7ULP_FSR) & FSR_TXCOUNT) {
writel(SR_FCF, fsl_lpspi->base + IMX7ULP_SR);
fsl_lpspi_intctrl(fsl_lpspi, IER_FCIE);
return IRQ_HANDLED;
--
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