[U-Boot] [PATCH 1/1] fsl_qspi: Pet the watchdog while reading/writing

Alexander Stein
2015-11-04T08:19:10Z

When reading a large blob. e.g. a linux kernel (several MiBs) a watchdog
timeout might occur meanwhile. So pet the watchdog while operating on
the flash.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
---
drivers/spi/fsl_qspi.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
index ed39114..feec3e8 100644
--- a/drivers/spi/fsl_qspi.c
+++ b/drivers/spi/fsl_qspi.c
@@ -13,6 +13,7 @@
#include <linux/sizes.h>
#include <dm.h>
#include <errno.h>
+#include <watchdog.h>
#include "fsl_qspi.h"

DECLARE_GLOBAL_DATA_PTR;
@@ -527,6 +528,8 @@ static void qspi_op_read(struct fsl_qspi_priv *priv, u32 *rxbuf, u32 len)
to_or_from = priv->sf_addr + priv->cur_amba_base;

while (len > 0) {
+ WATCHDOG_RESET();
+
qspi_write32(priv->flags, &regs->sfar, to_or_from);

size = (len > RX_BUFFER_SIZE) ?
@@ -574,6 +577,8 @@ static void qspi_op_write(struct fsl_qspi_priv *priv, u8 *txbuf, u32 len)

status_reg = 0;
while ((status_reg & FLASH_STATUS_WEL) != FLASH_STATUS_WEL) {
+ WATCHDOG_RESET();
+
qspi_write32(priv->flags, &regs->ipcr,
(SEQID_WREN << QSPI_IPCR_SEQID_SHIFT) | 0);
while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
--
2.4.10