X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=README;h=15428643edef7ea77710113f8908002b50328577;hb=874bb7b88fe9b4648e1288a387af2e31014a72f3;hp=f78bf5052333454b7e8368d3663bfd4a6f173cdf;hpb=a9398e018593782c5fa7d0741955fc1256b34c1e;p=u-boot

diff --git a/README b/README
index f78bf50523..15428643ed 100644
--- a/README
+++ b/README
@@ -1207,7 +1207,12 @@ The following options need to be configured:
 		clock chips. See common/cmd_i2c.c for a description of the
 		command line interface.
 
-		CONFIG_HARD_I2C selects the CPM hardware driver for I2C.
+		CONFIG_I2C_CMD_TREE is a recommended option that places
+		all I2C commands under a single 'i2c' root command.  The
+		older 'imm', 'imd', 'iprobe' etc. commands are considered
+		deprecated and may disappear in the future.
+
+		CONFIG_HARD_I2C selects a hardware I2C controller.
 
 		CONFIG_SOFT_I2C configures u-boot to use a software (aka
 		bit-banging) driver instead of CPM or similar hardware
@@ -1312,6 +1317,52 @@ The following options need to be configured:
 		in u-boot bd_info structure based on u-boot environment
 		variable "i2cfast". (see also i2cfast)
 
+		CONFIG_I2C_MULTI_BUS
+
+		This option allows the use of multiple I2C buses, each of which
+		must have a controller.  At any point in time, only one bus is
+		active.  To switch to a different bus, use the 'i2c dev' command.
+		Note that bus numbering is zero-based.
+
+		CFG_I2C_NOPROBES
+
+		This option specifies a list of I2C devices that will be skipped
+		when the 'i2c probe' command is issued (or 'iprobe' using the legacy
+		command).  If CONFIG_I2C_MULTI_BUS is set, specify a list of bus-device
+		pairs.  Otherwise, specify a 1D array of device addresses
+
+		e.g.
+			#undef	CONFIG_I2C_MULTI_BUS
+			#define CFG_I2C_NOPROBES	{0x50,0x68}
+
+		will skip addresses 0x50 and 0x68 on a board with one I2C bus
+
+			#define	CONFIG_I2C_MULTI_BUS
+			#define CFG_I2C_MULTI_NOPROBES	{{0,0x50},{0,0x68},{1,0x54}}
+
+		will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1
+
+		CFG_SPD_BUS_NUM
+
+		If defined, then this indicates the I2C bus number for DDR SPD.
+		If not defined, then U-Boot assumes that SPD is on I2C bus 0.
+
+		CFG_RTC_BUS_NUM
+
+		If defined, then this indicates the I2C bus number for the RTC.
+		If not defined, then U-Boot assumes that RTC is on I2C bus 0.
+
+		CFG_DTT_BUS_NUM
+
+		If defined, then this indicates the I2C bus number for the DTT.
+		If not defined, then U-Boot assumes that DTT is on I2C bus 0.
+
+		CONFIG_FSL_I2C
+
+		Define this option if you want to use Freescale's I2C driver in
+		drivers/fsl_i2c.c.
+
+
 - SPI Support:	CONFIG_SPI
 
 		Enables SPI driver (so far only tested with
@@ -2209,6 +2260,24 @@ Low Level (hardware related) configuration options:
   CFG_POCMR2_MASK_ATTRIB: (MPC826x only)
 		Overrides the default PCI memory map in cpu/mpc8260/pci.c if set.
 
+- CONFIG_SPD_EEPROM
+		Get DDR timing information from an I2C EEPROM.  Common with pluggable
+		memory modules such as SODIMMs
+  SPD_EEPROM_ADDRESS
+		I2C address of the SPD EEPROM
+
+- CFG_SPD_BUS_NUM
+		If SPD EEPROM is on an I2C bus other than the first one, specify here.
+		Note that the value must resolve to something your driver can deal with.
+
+- CFG_83XX_DDR_USES_CS0
+		Only for 83xx systems. If specified, then DDR should be configured
+		using CS0 and CS1 instead of CS2 and CS3.
+
+- CFG_83XX_DDR_USES_CS0
+		Only for 83xx systems. If specified, then DDR should be configured
+		using CS0 and CS1 instead of CS2 and CS3.
+
 - CONFIG_ETHER_ON_FEC[12]
 		Define to enable FEC[12] on a 8xx series processor.