Merge tag 'exynos-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene...

[cascardo/linux.git] / arch / arm / mach-mvebu / board-v7.c

diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c
index b2524d6..f244622 100644 (file)
--- a/arch/arm/mach-mvebu/board-v7.c
+++ b/arch/arm/mach-mvebu/board-v7.c
@@ -125,8 +125,16 @@ static void __init thermal_quirk(void)
 {
        struct device_node *np;
        u32 dev, rev;
+       int res;
 
-       if (mvebu_get_soc_id(&dev, &rev) == 0 && rev > ARMADA_375_Z1_REV)
+       /*
+        * The early SoC Z1 revision needs a quirk to be applied in order
+        * for the thermal controller to work properly. This quirk breaks
+        * the thermal support if applied on a SoC that doesn't need it,
+        * so we enforce the SoC revision to be known.
+        */
+       res = mvebu_get_soc_id(&dev, &rev);
+       if (res < 0 || (res == 0 && rev > ARMADA_375_Z1_REV))
                return;
 
        for_each_compatible_node(np, NULL, "marvell,armada375-thermal") {
@@ -160,7 +168,8 @@ static void __init thermal_quirk(void)
 
                /*
                 * The thermal controller needs some quirk too, so let's change
-                * the compatible string to reflect this.
+                * the compatible string to reflect this and allow the driver
+                * the take the necessary action.
                 */
                prop = kzalloc(sizeof(*prop), GFP_KERNEL);
                prop->name = kstrdup("compatible", GFP_KERNEL);