mfd: sec: Fix RTC alarm interrupt number on S2MPS11

The RTC on S2MPS11 is the same as S2MPS14. However interrupt numbers of
RTC alarms 0 and 1 were inversed between these two devices. So when
rtc-s5m driver requested S2MPS14_IRQ_RTCA0 interrupt, it matched to
S2MPS11_IRQ_RTCA1, not RTCA0.

Fix this by using consistent RTC alarm interrupt numbers and adding a
BUILD_BUG_ON for future generations.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

2 files changed, 11 insertions, 5 deletions

diff --git a/drivers/mfd/sec-irq.c b/drivers/mfd/sec-irq.c
index ba86a918c2da..806fa8dbb22d 100644
--- a/drivers/mfd/sec-irq.c
+++ b/drivers/mfd/sec-irq.c
@@ -61,14 +61,14 @@ static const struct regmap_irq s2mps11_irqs[] = {
                 .reg_offset = 1,
                 .mask = S2MPS11_IRQ_RTC60S_MASK,
         },
-        [S2MPS11_IRQ_RTCA0] = {
-                .reg_offset = 1,
-                .mask = S2MPS11_IRQ_RTCA0_MASK,
-        },
         [S2MPS11_IRQ_RTCA1] = {
                 .reg_offset = 1,
                 .mask = S2MPS11_IRQ_RTCA1_MASK,
         },
+        [S2MPS11_IRQ_RTCA0] = {
+                .reg_offset = 1,
+                .mask = S2MPS11_IRQ_RTCA0_MASK,
+        },
         [S2MPS11_IRQ_SMPL] = {
                 .reg_offset = 1,
                 .mask = S2MPS11_IRQ_SMPL_MASK,
@@ -484,6 +484,12 @@ int sec_irq_init(struct sec_pmic_dev *sec_pmic)
                 return ret;
         }
 
+        /*
+         * The rtc-s5m driver requests S2MPS14_IRQ_RTCA0 also for S2MPS11
+         * so the interrupt number must be consistent.
+         */
+        BUILD_BUG_ON(((enum s2mps14_irq)S2MPS11_IRQ_RTCA0) != S2MPS14_IRQ_RTCA0);
+
         return 0;
 }
 
diff --git a/include/linux/mfd/samsung/irq.h b/include/linux/mfd/samsung/irq.h
index f35af7361b60..667aa40486dd 100644
--- a/include/linux/mfd/samsung/irq.h
+++ b/include/linux/mfd/samsung/irq.h
@@ -74,8 +74,8 @@ enum s2mps11_irq {
         S2MPS11_IRQ_MRB,
 
         S2MPS11_IRQ_RTC60S,
-        S2MPS11_IRQ_RTCA0,
         S2MPS11_IRQ_RTCA1,
+        S2MPS11_IRQ_RTCA0,
         S2MPS11_IRQ_SMPL,
         S2MPS11_IRQ_RTC1S,
         S2MPS11_IRQ_WTSR,