X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fkernel%2Fgeode_32.c;h=9b08e852fd1ae63d3312552dd6898622ee4fd73b;hb=877acedc0d3ea07f7b36573ed2f1f479c2c1eefd;hp=9dad6ca6cd70d2812426d7da93224aeaa2d69e33;hpb=4f02f8220562591322c118d07a32bebf705318b7;p=linux-2.6

diff --git a/arch/x86/kernel/geode_32.c b/arch/x86/kernel/geode_32.c
index 9dad6ca6cd..9b08e852fd 100644
--- a/arch/x86/kernel/geode_32.c
+++ b/arch/x86/kernel/geode_32.c
@@ -161,6 +161,28 @@ void geode_gpio_setup_event(unsigned int gpio, int pair, int pme)
 }
 EXPORT_SYMBOL_GPL(geode_gpio_setup_event);
 
+int geode_has_vsa2(void)
+{
+	static int has_vsa2 = -1;
+
+	if (has_vsa2 == -1) {
+		u16 val;
+
+		/*
+		 * The VSA has virtual registers that we can query for a
+		 * signature.
+		 */
+		outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
+		outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
+
+		val = inw(VSA_VRC_DATA);
+		has_vsa2 = (val == AMD_VSA_SIG || val == GSW_VSA_SIG);
+	}
+
+	return has_vsa2;
+}
+EXPORT_SYMBOL_GPL(geode_has_vsa2);
+
 static int __init geode_southbridge_init(void)
 {
 	if (!is_geode())