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spi: sprd: switch the sequence of setting WDG_LOAD_LOW and _HIGH 

commit 8bdd79dae1 upstream.

The watchdog counter consists of WDG_LOAD_LOW and WDG_LOAD_HIGH,
which would be loaded to watchdog counter once writing WDG_LOAD_LOW.

Fixes: ac17750120 ("spi: sprd: Add the support of restarting the system")
Signed-off-by: Lingling Xu <ling_ling.xu@unisoc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lore.kernel.org/r/20200602082415.5848-1-zhang.lyra@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Lingling Xu 2020-06-02 16:24:15 +08:00 committed by Greg Kroah-Hartman
parent 1245a1e0e1
commit 5d7e2852d7
1 changed files with 1 additions and 1 deletions
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2
drivers/spi/spi-sprd-adi.c
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@ -384,9 +384,9 @@ static int sprd_adi_restart_handler(struct notifier_block *this,
sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOCK, WDG_UNLOCK_KEY);
/* Load the watchdog timeout value, 50ms is always enough. */
sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOAD_HIGH, 0);
sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOAD_LOW,
WDG_LOAD_VAL & WDG_LOAD_MASK);
sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOAD_HIGH, 0);
/* Start the watchdog to reset system */
sprd_adi_read(sadi, sadi->slave_pbase + REG_WDG_CTRL, &val);