[PATCH 3/6] rtc: m41t80: Fix watchdog resolution bit handling for chips without extra resolution

[Alexander Shiyan <eagle.alexander923@gmail.com>]

For chips without the extra watchdog resolution (i.e., those with only 2
resolution bits), bit 7 (RB2) must be cleared to avoid invalid settings.
The current logic clears RB2 only when extra resolution is present.
Reverse the condition.

Fixes: d3a126fcf9df ("rtc: rtc-m41t80.c: add support for the ST M41T65 RTC")
Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 drivers/rtc/rtc-m41t80.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 52f398107d35..11ef8195e786 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -658,10 +658,10 @@ static void wdt_ping(void)
 		i2c_data[1] = wdt_margin << 2 | 0x82;
 
 	/*
-	 * M41T65 has three bits for watchdog resolution.  Don't set bit 7, as
-	 * that would be an invalid resolution.
+	 * Chips with extra watchdog resolution have three bits.
+	 * Don't set bit 7, as that would be an invalid resolution.
 	 */
-	if (clientdata->features & M41T80_FEATURE_WDR)
+	if (!(clientdata->features & M41T80_FEATURE_WDR))
 		i2c_data[1] &= ~M41T80_WATCHDOG_RB2;
 
 	i2c_transfer(save_client->adapter, msgs1, 1);
-- 
2.52.0