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OMAP3: BeagleBoard: Enable pullups on i2c2.

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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>
This commit is contained in:
Steve Kipisz 2011-04-18 17:27:00 -04:00 committed by Albert ARIBAUD
parent cf073e49bc
commit d4e53f063d
2 changed files with 18 additions and 0 deletions
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14
arch/arm/include/asm/arch-omap3/omap3.h
View file

@ -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)

4
board/ti/beagle/beagle.c
View file

@ -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: