soc: bcm: bcm2835-pm: Fix PM_IMAGE_PERI power domain support.

We don't have ASB master/slave regs for this domain, so just skip that
step.

Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: 670c672608a1 ("soc: bcm: bcm2835-pm: Add support for power domains under a new binding.")

diff --git a/drivers/soc/bcm/bcm2835-power.c b/drivers/soc/bcm/bcm2835-power.c
index 4841295..4a1b99b 100644 (file)
--- a/drivers/soc/bcm/bcm2835-power.c
+++ b/drivers/soc/bcm/bcm2835-power.c
@@ -150,7 +150,12 @@ struct bcm2835_power {
 
 static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
 {
-       u64 start = ktime_get_ns();
+       u64 start;
+
+       if (!reg)
+               return 0;
+
+       start = ktime_get_ns();
 
        /* Enable the module's async AXI bridges. */
        ASB_WRITE(reg, ASB_READ(reg) & ~ASB_REQ_STOP);
@@ -165,7 +170,12 @@ static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
 
 static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg)
 {
-       u64 start = ktime_get_ns();
+       u64 start;
+
+       if (!reg)
+               return 0;
+
+       start = ktime_get_ns();
 
        /* Enable the module's async AXI bridges. */
        ASB_WRITE(reg, ASB_READ(reg) | ASB_REQ_STOP);