Clarify why we need to ping the watchdog before changing the timeout by quoting the MAX77714 datasheet. Signed-off-by: Luca Ceresoli <luca@xxxxxxxxxxxxxxxx> --- This patch is new in v4. It adds a clarification comment to the max77620 driver taken from v3 patch 7. --- drivers/watchdog/max77620_wdt.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/watchdog/max77620_wdt.c b/drivers/watchdog/max77620_wdt.c index 06b48295fab6..f082a4ea2c03 100644 --- a/drivers/watchdog/max77620_wdt.c +++ b/drivers/watchdog/max77620_wdt.c @@ -132,6 +132,11 @@ static int max77620_wdt_set_timeout(struct watchdog_device *wdt_dev, break; } + /* + * "If the value of TWD needs to be changed, clear the system + * watchdog timer first [...], then change the value of TWD." + * (MAX77714 datasheet) + */ ret = regmap_update_bits(wdt->rmap, wdt->drv_data->reg_cnfg_glbl3, wdt->drv_data->wdtc_mask, 0x1); if (ret < 0) -- 2.25.1
