[PATCH 1/2] spi: spi-mem: stm32-qspi: avoid memory corruption at low frequency

[Ludovic Barre]

From: Ludovic Barre <ludovic.barre@xxxxxx>

This patch solves a memory corruption seen at 8 MHz.
To avoid such issue, timeout counter is disabled.

Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
---
 drivers/spi/spi-stm32-qspi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 3b2a9a6..7354f9d 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -76,7 +76,6 @@
 #define QSPI_PSMAR		0x28
 #define QSPI_PIR		0x2c
 #define QSPI_LPTR		0x30
-#define LPTR_DFT_TIMEOUT	0x10
 
 #define STM32_QSPI_MAX_MMAP_SZ	SZ_256M
 #define STM32_QSPI_MAX_NORCHIP	2
@@ -372,8 +371,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
 	flash->presc = presc;
 
 	mutex_lock(&qspi->lock);
-	writel_relaxed(LPTR_DFT_TIMEOUT, qspi->io_base + QSPI_LPTR);
-	cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_TCEN | CR_SSHIFT | CR_EN;
+	cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
 	writel_relaxed(cr, qspi->io_base + QSPI_CR);
 
 	/* set dcr fsize to max address */
-- 
2.7.4