diff options
Diffstat (limited to 'recipes/u-boot/u-boot-git/beagleboard/0004-OMAP3-BeagleBoard-Enable-pullups-on-i2c2.patch')
| -rw-r--r-- | recipes/u-boot/u-boot-git/beagleboard/0004-OMAP3-BeagleBoard-Enable-pullups-on-i2c2.patch | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/recipes/u-boot/u-boot-git/beagleboard/0004-OMAP3-BeagleBoard-Enable-pullups-on-i2c2.patch b/recipes/u-boot/u-boot-git/beagleboard/0004-OMAP3-BeagleBoard-Enable-pullups-on-i2c2.patch new file mode 100644 index 0000000000..4840d8697d --- /dev/null +++ b/recipes/u-boot/u-boot-git/beagleboard/0004-OMAP3-BeagleBoard-Enable-pullups-on-i2c2.patch @@ -0,0 +1,69 @@ +From 6859e4b88c405ed40c898d259227f158da5f867a Mon Sep 17 00:00:00 2001 +From: Steve Kipisz <s-kipisz2@ti.com> +Date: Thu, 5 Aug 2010 10:36:07 -0500 +Subject: [PATCH 04/16] OMAP3: BeagleBoard: Enable pullups on i2c2. + +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 + +v4 updates + * Fixed typo in typecast +--- + 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..9d03b24 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 control_prog_io *)OMAP34XX_CTRL_BASE; ++ ++ /* Enable i2c2 pullup resisters */ ++ writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1); + + switch (get_board_revision()) { + case REVISION_AXBX: +-- +1.6.6.1 + |