OMAP3: BeagleBoard: Enable pullups on i2c2.

This allows the reading of EEPROMS on the expansion bus without adding
external pull-ups.

Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Steve Kipisz <s-kipisz2@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

arch/arm/include/asm/arch-omap3/omap3.h

@@ -50,6 +50,20 @@
 /* CONTROL */
 #define OMAP34XX_CTRL_BASE		(OMAP34XX_L4_IO_BASE + 0x2000)
 
+#ifndef __ASSEMBLY__
+/* Signal Integrity Parameter Control Registers */
+struct control_prog_io {
+	unsigned char res[0x408];
+	unsigned int io2;		/* 0x408 */
+	unsigned char res2[0x38];
+	unsigned int io0;		/* 0x444 */
+	unsigned int io1;		/* 0x448 */
+};
+#endif /* __ASSEMBLY__ */
+
+/* Bit definition for CONTROL_PROG_IO1 */
+#define PRG_I2C2_PULLUPRESX		0x00000001
+
 /* UART */
 #define OMAP34XX_UART1			(OMAP34XX_L4_IO_BASE + 0x6a000)
 #define OMAP34XX_UART2			(OMAP34XX_L4_IO_BASE + 0x6c000)

board/ti/beagle/beagle.c

@@ -155,6 +155,10 @@ int misc_init_r(void)
 {
 	struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
 	struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
+	struct control_prog_io *prog_io_base = (struct gpio *)OMAP34XX_CTRL_BASE;
+
+	/* Enable i2c2 pullup resisters */
+	writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1);
 
 	switch (get_board_revision()) {
 	case REVISION_AXBX: