3 files changed, 54 insertions, 0 deletions
diff --git a/src/southbridge/intel/lynxpoint/lp_gpio.c b/src/southbridge/intel/lynxpoint/lp_gpio.c
index b90e5ba4b8..7d1a28d73c 100644
--- a/src/southbridge/intel/lynxpoint/lp_gpio.c
+++ b/src/southbridge/intel/lynxpoint/lp_gpio.c
@@ -36,6 +36,35 @@ static u16 get_gpio_base(void)
 #endif
 }
 
+
+/*
+ * This function will return a number that indicates which PIRQ
+ * this GPIO maps to.  If this is not a PIRQ capable GPIO then
+ * it will return -1.  The GPIO to PIRQ mapping is not linear.
+ */
+static int lp_gpio_to_pirq(int gpio)
+{
+	switch (gpio) {
+	case 8:  return 0;	/* PIRQI */
+	case 9:  return 1;	/* PIRQJ */
+	case 10: return 2;	/* PIRQK */
+	case 13: return 3;	/* PIRQL */
+	case 14: return 4;	/* PIRQM */
+	case 45: return 5;	/* PIRQN */
+	case 46: return 6;	/* PIRQO */
+	case 47: return 7;	/* PIRQP */
+	case 48: return 8;	/* PIRQQ */
+	case 49: return 9;	/* PIRQR */
+	case 50: return 10;	/* PIRQS */
+	case 51: return 11;	/* PIRQT */
+	case 52: return 12;	/* PIRQU */
+	case 53: return 13;	/* PIRQV */
+	case 54: return 14;	/* PIRQW */
+	case 55: return 15;	/* PIRQX */
+	default: return -1;
+	};
+}
+
 void setup_pch_lp_gpios(const struct pch_lp_gpio_map map[])
 {
 	u16 gpio_base = get_gpio_base();
@@ -45,6 +74,7 @@ void setup_pch_lp_gpios(const struct pch_lp_gpio_map map[])
 	u32 irqen[3] = {0};
 	u32 reset[3] = {0};
 	u32 blink = 0;
+	u16 pirq2apic = 0;
 	int set, bit, gpio = 0;
 
 	for (config = map; config->conf0 != GPIO_LIST_END; config++, gpio++) {
@@ -67,6 +97,13 @@ void setup_pch_lp_gpios(const struct pch_lp_gpio_map map[])
 
 		if (set == 0)
 			blink |= config->blink << bit;
+
+		/* PIRQ to IO-APIC map */
+		if (config->pirq == GPIO_PIRQ_APIC_ROUTE) {
+			set = lp_gpio_to_pirq(gpio);
+			if (set >= 0)
+				pirq2apic |= 1 << set;
+		}
 	}
 
 	for (set = 0; set <= 2; set++) {
@@ -77,6 +114,7 @@ void setup_pch_lp_gpios(const struct pch_lp_gpio_map map[])
 	}
 
 	outl(blink, gpio_base + GPIO_BLINK);
+	outl(pirq2apic, gpio_base + GPIO_PIRQ_APIC_EN);
 }
 
 int get_gpio(int gpio_num)
diff --git a/src/southbridge/intel/lynxpoint/lp_gpio.h b/src/southbridge/intel/lynxpoint/lp_gpio.h
index d9927dc975..f1b2717423 100644
--- a/src/southbridge/intel/lynxpoint/lp_gpio.h
+++ b/src/southbridge/intel/lynxpoint/lp_gpio.h
@@ -93,6 +93,11 @@
 #define GPIO_RESET_PWROK	0
 #define GPIO_RESET_RSMRST	1
 
+/* pirq route to io-apic */
+
+#define GPIO_PIRQ_APIC_MASK	0
+#define GPIO_PIRQ_APIC_ROUTE	1
+
 #define LP_GPIO_END \
 	{ .conf0 = GPIO_LIST_END }
 
@@ -128,6 +133,11 @@
 	  .owner = GPIO_OWNER_GPIO, \
 	  .irqen = GPIO_IRQ_ENABLE }
 
+#define LP_GPIO_PIRQ \
+	{ .conf0 = GPIO_MODE_GPIO | GPIO_DIR_INPUT, \
+	  .owner = GPIO_OWNER_GPIO, \
+	  .pirq  = GPIO_PIRQ_APIC_ROUTE }
+
 #define LP_GPIO_OUT_HIGH \
 	{ .conf0 = GPIO_MODE_GPIO | GPIO_DIR_OUTPUT | GPO_LEVEL_HIGH, \
 	  .owner = GPIO_OWNER_GPIO, \
@@ -147,6 +157,7 @@ struct pch_lp_gpio_map {
 	u8 irqen;
 	u8 reset;
 	u8 blink;
+	u8 pirq;
 } __attribute__ ((packed));
 
 /* Configure GPIOs with mainboard provided settings */
diff --git a/src/southbridge/intel/lynxpoint/lpc.c b/src/southbridge/intel/lynxpoint/lpc.c
index 33d74f1903..ff50476a62 100644
--- a/src/southbridge/intel/lynxpoint/lpc.c
+++ b/src/southbridge/intel/lynxpoint/lpc.c
@@ -59,6 +59,11 @@ static void pch_enable_ioapic(struct device *dev)
 
 	/* affirm full set of redirection table entries ("write once") */
 	reg32 = io_apic_read(IO_APIC_ADDR, 0x01);
+	if (pch_is_lp()) {
+		/* PCH-LP has 39 redirection entries */
+		reg32 &= ~0x00ff0000;
+		reg32 |= 0x00270000;
+	}
 	io_apic_write(IO_APIC_ADDR, 0x01, reg32);
 
 	/*