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authorLudovic Barre <ludovic.barre@st.com>2019-03-08 14:12:20 +0100
committerMark Brown <broonie@kernel.org>2019-03-15 16:32:33 +0000
commit5356c2c70e385198e1a753ee364323f2fc01f759 (patch)
tree5dfcc9921a1917619cee0892c7d35b9403be434b /drivers/spi/spi-stm32-qspi.c
parent26843bb128590edd7eba1ad7ce22e4b9f1066ce3 (diff)
downloadlinux-5356c2c70e385198e1a753ee364323f2fc01f759.tar.bz2
spi: spi-mem: stm32-qspi: avoid memory corruption at low frequency
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@st.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-stm32-qspi.c')
-rw-r--r--drivers/spi/spi-stm32-qspi.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 3b2a9a6b990d..7354f9d68dba 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 */