0bea813d0018303610ec487314003c21f0116a21 - ARM: omap-common: Add standard access for board description EEPROM

Wed, 24 Feb 2016 18:30:54 +0000

ARM: omap-common: Add standard access for board description EEPROMSeveral TI EVMs have EEPROM that can contain board description informationsuch as revision, DDR definition, serial number, etc. In just about allcases, these EEPROM are on the I2C bus and provides us the opportunityto centralize the generic operations involved.The on-board EEPROM on the BeagleBone Black, BeagleBone, AM335x EVM,AM43x GP EVM, AM57xx-evm, BeagleBoard-X15 share the same format.However, DRA-7* EVMs, OMAP4SDP use a modified format.We hence introduce logic which is generic between these platformswithout enforcing any specific format. This allows the boards to use therelevant format for operations that they might choose.This module will compile for all TI SoC based boards whenCONFIG_TI_I2C_BOARD_DETECT is enabled to have optimal build times forplatforms that require this support.It is important to note that this logic is fundamental to the boardconfiguration process such as DDR configuration which is needed inSPL, hence cannot be part of the standard u-boot driver model (whichis available later in the process). Hence, to aid efficiency, theeeprom contents are copied over to SRAM scratchpad memory area at thefirst invocation to retrieve data.To prevent churn with cases such as DRA7, where eeprom format maybeincompatible, we introduce a generic common format in eeprom whichis made available over accessor functions for usage.Special handling for BBG1 EEPROM had to be introduced thanks to theweird eeprom rev contents used.The follow on patches introduce the use of this library for AM335x,AM437x, and AM57xx.Signed-off-by: Lokesh Vutla Signed-off-by: Steve Kipisz Signed-off-by: Roger Quadros Signed-off-by: Nishanth Menon Reviewed-by: Tom Rini List of files: /rk3399_rockchip-uboot/board/ti/common/Makefile

Changes in Makefile

0bea813d0018303610ec487314003c21f0116a21 - ARM: omap-common: Add standard access for board description EEPROM