rtc: rv3028: fix PORF handling

The PORF bit is cleared on interrupts which prevents the driver to know
when the time and date are invalid. Stop clearing PORF in the interrupt
handler.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210126221435.2152339-1-alexandre.belloni@bootlin.com

diff --git a/drivers/rtc/rtc-rv3028.c b/drivers/rtc/rtc-rv3028.c
index 2004f8c5397f7c3a7d5f5b7e9adfc4ff57240a65..4f8f6092097a12827c3b19e3c637082adec9edeb 100644 (file)
--- a/drivers/rtc/rtc-rv3028.c
+++ b/drivers/rtc/rtc-rv3028.c
@@ -268,6 +268,8 @@ static irqreturn_t rv3028_handle_irq(int irq, void *dev_id)
        if (status & RV3028_STATUS_PORF)
                dev_warn(&rv3028->rtc->dev, "Voltage low, data loss detected.\n");
 
+       status &= ~RV3028_STATUS_PORF;
+
        if (status & RV3028_STATUS_TF) {
                status |= RV3028_STATUS_TF;
                ctrl |= RV3028_CTRL2_TIE;