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>

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>
Steve Kipisz · Albert ARIBAUD · Eric Lee · Eric Lee · Eric Lee · Eric Lee
1 parent cf073e49bc
Showing 2 changed files with 18 additions and 0 deletions Side-by-side Diff
arch/arm/include/asm/arch-omap3/omap3.h
board/ti/beagle/beagle.c
@@ -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)
@@ -155,6 +155,10 @@
 {
 	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:
...	...	@@ -50,6 +50,20 @@
50	50	/* CONTROL */
51	51	#define OMAP34XX_CTRL_BASE (OMAP34XX_L4_IO_BASE + 0x2000)
52	52
	53	+#ifndef __ASSEMBLY__
	54	+/* Signal Integrity Parameter Control Registers */
	55	+struct control_prog_io {
	56	+ unsigned char res[0x408];
	57	+ unsigned int io2; /* 0x408 */
	58	+ unsigned char res2[0x38];
	59	+ unsigned int io0; /* 0x444 */
	60	+ unsigned int io1; /* 0x448 */
	61	+};
	62	+#endif /* __ASSEMBLY__ */
	63	+
	64	+/* Bit definition for CONTROL_PROG_IO1 */
	65	+#define PRG_I2C2_PULLUPRESX 0x00000001
	66	+
53	67	/* UART */
54	68	#define OMAP34XX_UART1 (OMAP34XX_L4_IO_BASE + 0x6a000)
55	69	#define OMAP34XX_UART2 (OMAP34XX_L4_IO_BASE + 0x6c000)
...	...	@@ -155,6 +155,10 @@
155	155	{
156	156	struct gpio gpio5_base = (struct gpio )OMAP34XX_GPIO5_BASE;
157	157	struct gpio gpio6_base = (struct gpio )OMAP34XX_GPIO6_BASE;
	158	+ struct control_prog_io prog_io_base = (struct gpio )OMAP34XX_CTRL_BASE;
	159	+
	160	+ /* Enable i2c2 pullup resisters */
	161	+ writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1);
158	162
159	163	switch (get_board_revision()) {
160	164	case REVISION_AXBX: