[PATCH] Boards: Fix several issues with nvidia_mcp_gpio_set.

[Luc Verhaegen]

- CK804, MCP04, MCP2 use the isa bridges..
- Newer nvidia mcp's do use the smbus controllers (Found by
  Michael Karcher).
- gpio line check breaks EPoX EP-8RDA3+, and should be wider.

Signed-off-by: Luc Verhaegen 
---
 board_enable.c |   16 +++++++++++++---
 1 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/board_enable.c b/board_enable.c
index 8b5ed95..2c58927 100644
--- a/board_enable.c
+++ b/board_enable.c
@@ -440,20 +440,30 @@ static int nvidia_mcp_gpio_set(int gpio, int raise)
    uint16_t base;
    uint8_t tmp;

-	if ((gpio < 0) || (gpio > 31)) {
+	if ((gpio < 0) || (gpio > 0x40)) {
    	fprintf(stderr, "\nERROR: unsupported GPIO: %d.\n", gpio);
    	return -1;
    }

-	dev = pci_dev_find_vendorclass(0x10DE, 0x0C05);
+	/* First, check the ISA Bridge */
+	dev = pci_dev_find_vendorclass(0x10DE, 0x0601);
    switch (dev->device_id) {
    case 0x0030: /* CK804 */
    case 0x0050: /* MCP04 */
    case 0x0060: /* MCP2 */
    	break;
    default:
-		fprintf(stderr, "\nERROR: no nVidia SMBus controller found.\n");
+	    /* Newer MCPs use the SMBus Controller */
+	    dev = pci_dev_find_vendorclass(0x10DE, 0x0C05);
+	    switch (dev->device_id) {
+	    case 0x0264: /* MCP51 */
+		break;
+	    default:
+		fprintf(stderr,
+			"\nERROR: no nVidia LPC/SMBus controller found.\n");
    	return -1;
+	    }
+	    break;
    }

base = pci_read_long(dev, 0x64) & 0x0000FF00; /* System control area */