During QSPI reads, current is_controller_busy function sporadically fails with -ETIMEDOUT due to fixed number of 5 test loops. Using timer functions to wait 1000 us instead will fix this.

Signed-off-by: Thomas Schaefer thomas.schaefer@kontron.com --- drivers/spi/fsl_qspi.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c index 1598c4f698..2c5937509f 100644 --- a/drivers/spi/fsl_qspi.c +++ b/drivers/spi/fsl_qspi.c @@ -152,7 +152,7 @@ static inline int is_controller_busy(const struct fsl_qspi_priv *priv) u32 val; const u32 mask = QSPI_SR_BUSY_MASK | QSPI_SR_AHB_ACC_MASK | QSPI_SR_IP_ACC_MASK; - unsigned int retry = 5; + unsigned long timeout = timer_get_us() + 1000;

do { val = qspi_read32(priv->flags, &priv->regs->sr); @@ -160,10 +160,9 @@ static inline int is_controller_busy(const struct fsl_qspi_priv *priv) if ((~val & mask) == mask) return 0;

- udelay(1); - } while (--retry); - - return -ETIMEDOUT; + if (timer_get_us() > timeout ) + return -ETIMEDOUT; + } while (1); }

/* QSPI support swapping the flash read/write data

Use readl_poll_timeout instead of explicit calculation.

Signed-off-by: Thomas Schaefer thomas.schaefer@kontron.com --- drivers/spi/fsl_qspi.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c index 2c5937509f..41abe1996f 100644 --- a/drivers/spi/fsl_qspi.c +++ b/drivers/spi/fsl_qspi.c @@ -10,6 +10,7 @@ #include <spi.h> #include <asm/io.h> #include <linux/sizes.h> +#include <linux/iopoll.h> #include <dm.h> #include <errno.h> #include <watchdog.h> @@ -150,19 +151,13 @@ static void qspi_write32(u32 flags, u32 *addr, u32 val) static inline int is_controller_busy(const struct fsl_qspi_priv *priv) { u32 val; - const u32 mask = QSPI_SR_BUSY_MASK | QSPI_SR_AHB_ACC_MASK | - QSPI_SR_IP_ACC_MASK; - unsigned long timeout = timer_get_us() + 1000; + u32 mask = QSPI_SR_BUSY_MASK | QSPI_SR_AHB_ACC_MASK | + QSPI_SR_IP_ACC_MASK;

- do { - val = qspi_read32(priv->flags, &priv->regs->sr); + if (priv->flags & QSPI_FLAG_REGMAP_ENDIAN_BIG) + mask = (u32)cpu_to_be32(mask);

- if ((~val & mask) == mask) - return 0; - - if (timer_get_us() > timeout ) - return -ETIMEDOUT; - } while (1); + return readl_poll_timeout(&priv->regs->sr, val, !(val & mask), 1000); }

/* QSPI support swapping the flash read/write data