From: Steve Sakoman <steve@sakoman.com>
Date: Thu, 12 Aug 2010 22:13:02 +0000 (-0700)
Subject: ARMV7: OMAP: Add board revision detection for Overo
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=c2d5b341206f44c13f4de3c4bb80916d085dfdea;p=u-boot.git

ARMV7: OMAP: Add board revision detection for Overo

The latest Overo COM modules encode their revision number on
GPIOs 115, 113, and 112.  All boards to date have no pullups on these pins
and hence appear as revision 0.

This patch reads and prints the revision information.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
---

diff --git a/board/overo/overo.c b/board/overo/overo.c
index e85be7d5e6..1c7087b7ed 100644
--- a/board/overo/overo.c
+++ b/board/overo/overo.c
@@ -60,6 +60,37 @@ int board_init(void)
 	return 0;
 }
 
+/*
+ * Routine: get_board_revision
+ * Description: Returns the board revision
+ */
+int get_board_revision(void)
+{
+	int revision;
+
+	if (!omap_request_gpio(112) &&
+	    !omap_request_gpio(113) &&
+	    !omap_request_gpio(115)) {
+
+		omap_set_gpio_direction(112, 1);
+		omap_set_gpio_direction(113, 1);
+		omap_set_gpio_direction(115, 1);
+
+		revision = omap_get_gpio_datain(115) << 2 |
+			   omap_get_gpio_datain(113) << 1 |
+			   omap_get_gpio_datain(112);
+
+		omap_free_gpio(112);
+		omap_free_gpio(113);
+		omap_free_gpio(115);
+	} else {
+		printf("Error: unable to acquire board revision GPIOs\n");
+		revision = -1;
+	}
+
+	return revision;
+}
+
 /*
  * Routine: misc_init_r
  * Description: Configure board specific parts
@@ -73,6 +104,7 @@ int misc_init_r(void)
 	setup_net_chip();
 #endif
 
+	printf("Board revision: %d\n", get_board_revision());
 	dieid_num_r();
 
 	return 0;
diff --git a/board/overo/overo.h b/board/overo/overo.h
index fff43dac9c..a4e49b91a0 100644
--- a/board/overo/overo.h
+++ b/board/overo/overo.h
@@ -189,11 +189,11 @@ const omap3_sysinfo sysinfo = {
 	MUX_VAL(CP(CAM_XCLKB),		(IDIS | PTD | DIS | M0)) /*CAM_XCLKB*/\
 	MUX_VAL(CP(CAM_WEN),		(IEN  | PTD | DIS | M0)) /*CAM_WEN*/\
 	MUX_VAL(CP(CAM_STROBE),		(IDIS | PTD | DIS | M0)) /*CAM_STROBE*/\
-	MUX_VAL(CP(CSI2_DX0),		(IEN  | PTD | DIS | M0)) /*CSI2_DX0*/\
-	MUX_VAL(CP(CSI2_DY0),		(IEN  | PTD | DIS | M0)) /*CSI2_DY0*/\
+	MUX_VAL(CP(CSI2_DX0),		(IEN  | PTD | EN  | M4)) /*GPIO_112*/\
+	MUX_VAL(CP(CSI2_DY0),		(IEN  | PTD | EN  | M4)) /*GPIO_113*/\
 	MUX_VAL(CP(CSI2_DX1),		(IEN  | PTD | EN  | M4)) /*GPIO_114*/\
 								 /* - PEN_DOWN*/\
-	MUX_VAL(CP(CSI2_DY1),		(IEN  | PTU | EN  | M4)) /*GPIO_115*/\
+	MUX_VAL(CP(CSI2_DY1),		(IEN  | PTD | EN  | M4)) /*GPIO_115*/\
  /*Audio Interface */\
 	MUX_VAL(CP(MCBSP2_FSX),		(IEN  | PTD | DIS | M0)) /*McBSP2_FSX*/\
 	MUX_VAL(CP(MCBSP2_CLKX),	(IEN  | PTD | DIS | M0)) /*McBSP2_CLKX*/\