spi: spi-mem: stm32-qspi: avoid memory corruption at low frequency (5356c2c7) · Commits · 戴 / test

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

drivers/spi/spi-stm32-qspi.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -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 */