From e48ec51b43ed0c9a4eb767addb829cef418041c7 Mon Sep 17 00:00:00 2001
From: Patrice Chotard <patrice.chotard@foss.st.com>
Date: Wed, 20 Jan 2021 14:42:02 +0100
Subject: [PATCH] spi: stm32_qspi: Add WATCHDOG_RESET in
 _stm32_qspi_read_fifo()

In case of reading large area and memory-map mode is misconfigured
(memory-map size declared lower than the real size of the memory chip)
watchdog can be triggered.

Add WATCHDOG_RESET() in _stm32_qspi_read_fifo to fix it.

Issue reproduced with stm32mp157c-ev1 board and memory map size set to
1, with following command:
sf read 0xC0000000 0 0x4000000

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
---
 drivers/spi/stm32_qspi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/stm32_qspi.c b/drivers/spi/stm32_qspi.c
index 75e5e840ed..4acc9047b9 100644
--- a/drivers/spi/stm32_qspi.c
+++ b/drivers/spi/stm32_qspi.c
@@ -16,6 +16,7 @@
 #include <reset.h>
 #include <spi.h>
 #include <spi-mem.h>
+#include <watchdog.h>
 #include <dm/device_compat.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
@@ -171,6 +172,7 @@ static int _stm32_qspi_wait_cmd(struct stm32_qspi_priv *priv,
 static void _stm32_qspi_read_fifo(u8 *val, void __iomem *addr)
 {
 	*val = readb(addr);
+	WATCHDOG_RESET();
 }
 
 static void _stm32_qspi_write_fifo(u8 *val, void __iomem *addr)
-- 
2.39.5