From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baolin Wang Subject: [PATCH 1/2] spi: sprd: adi: Add missing lock protection when rebooting Date: Mon, 28 Oct 2019 18:10:30 +0800 Message-ID: <7b04711127434555e3a1a86bc6be99860cd86668.1572257085.git.baolin.wang@linaro.org> Cc: orsonzhai@gmail.com, zhang.lyra@gmail.com, baolin.wang@linaro.org, baolin.wang7@gmail.com, ling_ling.xu@unisoc.com, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org To: broonie@kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org From: Lingling Xu When rebooting the system, we should lock the watchdog after configuration to make sure the watchdog can reboot the system successfully. Signed-off-by: Lingling Xu Signed-off-by: Baolin Wang --- drivers/spi/spi-sprd-adi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c index 9a05128..9613cfe 100644 --- a/drivers/spi/spi-sprd-adi.c +++ b/drivers/spi/spi-sprd-adi.c @@ -393,6 +393,9 @@ static int sprd_adi_restart_handler(struct notifier_block *this, val |= BIT_WDG_RUN | BIT_WDG_RST; sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_CTRL, val); + /* Lock the watchdog */ + sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOCK, ~WDG_UNLOCK_KEY); + mdelay(1000); dev_emerg(sadi->dev, "Unable to restart system\n"); -- 1.7.9.5