irqchip/armada-370-xp: Do not touch Performance Counter Overflow on A375, A38x, A39x

commit a3d66a76348daf559873f19afc912a2a7c2ccdaf upstream.

Register ARMADA_370_XP_INT_FABRIC_MASK_OFFS is Armada 370 and XP specific
and on new Armada platforms it has different meaning. It does not configure
Performance Counter Overflow interrupt masking. So do not touch this
register on non-A370/XP platforms (A375, A38x and A39x).

Signed-off-by: Pali Rohár <pali@kernel.org>
Cc: stable@vger.kernel.org
Fixes: 28da06dfd9e4 ("irqchip: armada-370-xp: Enable the PMU interrupts")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220425113706.29310-1-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 5849ac5a2ad3b49d3f7fcbcda724548fec02cc4a..0fd428db3aa4d2c5e1be2f4b343106534b6987cf 100644 (file)
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -392,7 +392,16 @@ static void armada_xp_mpic_smp_cpu_init(void)
 
 static void armada_xp_mpic_perf_init(void)
 {
-       unsigned long cpuid = cpu_logical_map(smp_processor_id());
+       unsigned long cpuid;
+
+       /*
+        * This Performance Counter Overflow interrupt is specific for
+        * Armada 370 and XP. It is not available on Armada 375, 38x and 39x.
+        */
+       if (!of_machine_is_compatible("marvell,armada-370-xp"))
+               return;
+
+       cpuid = cpu_logical_map(smp_processor_id());
 
        /* Enable Performance Counter Overflow interrupts */
        writel(ARMADA_370_XP_INT_CAUSE_PERF(cpuid),