Maybe the unit enters the hardware related state at runtime and not at
system boot time (after a power cycle).
Signed-off-by: Juergen Borleis <j...@pengutronix.de>
Signed-off-by: Robert Schwebel <r...@pengutronix.de>
[rsc: got NDA clearance from Freescale]
---
drivers/rtc/rtc-imxdi.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c
index f0c8319..8890a62 100644
--- a/drivers/rtc/rtc-imxdi.c
+++ b/drivers/rtc/rtc-imxdi.c
@@ -665,6 +665,25 @@ static irqreturn_t dryice_norm_irq(int irq, void *dev_id)
irqreturn_t rc = IRQ_NONE;
dier = readl(imxdi->ioaddr + DIER);
+ dsr = readl(imxdi->ioaddr + DSR);
+
+ /* handle the security violation event */
+ if (dier & DIER_SVIE) {
+ if (dsr & DSR_SVF) {
+ /*
+ * Disable the interrupt when this kind of event has
+ * happened.
+ * There cannot be more than one event of this type,
+ * because it needs a complex state change
+ * including a main power cycle to get again out of
+ * this state.
+ */
+ di_int_disable(imxdi, DIER_SVIE);
+ /* report the violation */
+ di_report_tamper_info(imxdi, dsr);
+ rc = IRQ_HANDLED;
+ }
+ }
/* handle write complete and write error cases */
if (dier & DIER_WCIE) {
@@ -675,7 +694,6 @@ static irqreturn_t dryice_norm_irq(int irq, void *dev_id)
return rc;
/* DSR_WCF clears itself on DSR read */
- dsr = readl(imxdi->ioaddr + DSR);
if (dsr & (DSR_WCF | DSR_WEF)) {
/* mask the interrupt */
di_int_disable(imxdi, DIER_WCIE);
@@ -691,7 +709,6 @@ static irqreturn_t dryice_norm_irq(int irq, void *dev_id)
/* handle the alarm case */
if (dier & DIER_CAIE) {
/* DSR_WCF clears itself on DSR read */
- dsr = readl(imxdi->ioaddr + DSR);
if (dsr & DSR_CAF) {
/* mask the interrupt */
di_int_disable(imxdi, DIER_CAIE);
--
2.1.4
--
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