From: Steve Kipisz s-kipisz2@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
Signed-off-by: Jason Kridner jkridner@beagleboard.org --- arch/arm/include/asm/arch-omap3/omap3.h | 16 ++++++++++++++++ board/ti/beagle/beagle.c | 4 ++++ 2 files changed, 20 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..88454f2 100644 --- a/arch/arm/include/asm/arch-omap3/omap3.h +++ b/arch/arm/include/asm/arch-omap3/omap3.h @@ -50,6 +50,22 @@ /* 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..7ba98f1 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 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: