From: Steve Kipisz <s-kipi...@ti.com>
This allows the reading of EEPROMS on the expansion bus without adding
external pull-ups.
---
v2 updates
* Updated per http://patchwork.ozlabs.org/patch/71997/
* Added description
* Used OMAP34XX_CTRL_BASE
* Used structure and writel to perform write
v3 updates
* Included v3 in the subject line
* Fixed structure name typo that got messed up in generating patch
* Removed some extraneous blank lines
Signed-off-by: Jason Kridner <jkrid...@beagleboard.org>
---
arch/arm/include/asm/arch-omap3/omap3.h | 14 ++++++++++++++
board/ti/beagle/beagle.c | 4 ++++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/arch/arm/include/asm/arch-omap3/omap3.h
b/arch/arm/include/asm/arch-omap3/omap3.h
index 3957c79..cc2b541 100644
--- a/arch/arm/include/asm/arch-omap3/omap3.h
+++ b/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)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index 929461c..3884ca1 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -148,6 +148,10 @@ 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:
--
1.5.6.4
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