From: Thomas Schaefer <thomas.schae...@kontron.com>
During QSPI reads, current is_busy_controller function sporadically
fails with -ETIMEDOUT due to fixed number of 5 test loops. This patch
fixes this by using the readl_poll_timeout function with
1000 us timeout.
Signed-off-by: Thomas Schaefer <thomas.schae...@kontron.com>
Signed-off-by: Fabio Estevam <feste...@gmail.com>
---
drivers/spi/fsl_qspi.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
index 1598c4f698..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>
@@ -150,20 +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 int retry = 5;
+ 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;
-
- udelay(1);
- } while (--retry);
-
- return -ETIMEDOUT;
+ return readl_poll_timeout(&priv->regs->sr, val, !(val & mask), 1000);
}
/* QSPI support swapping the flash read/write data
--
2.11.0
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