Merge branch 'master' of git://git.denx.de/u-boot-arm

[kernel/u-boot.git] / doc / README.POST

diff --git a/doc/README.POST b/doc/README.POST
index 0d5e20e..6815d49 100644 (file)
--- a/doc/README.POST
+++ b/doc/README.POST
@@ -659,12 +659,19 @@ not need any modifications for porting them to another board/CPU.
 2.2.2.1. I2C test
 
 For verifying the I2C bus, a full I2C bus scanning will be performed
 2.2.2.1. I2C test
 
 For verifying the I2C bus, a full I2C bus scanning will be performed

-using the i2c_probe() routine. If any I2C device is found, the test
-will be considered as passed, otherwise failed. This particular way
-will be used because it provides the most common method of testing.
-For example, using the internal loopback mode of the CPM I2C
-controller for testing would not work on boards where the software
-I2C driver (also known as bit-banged driver) is used.
+using the i2c_probe() routine. If a board defines
+CONFIG_SYS_POST_I2C_ADDRS the I2C test will pass if all devices
+listed in CONFIG_SYS_POST_I2C_ADDRS are found, and no additional
+devices are detected.  If CONFIG_SYS_POST_I2C_ADDRS is not defined
+the test will pass if any I2C device is found.
+
+The CONFIG_SYS_POST_I2C_IGNORES define can be used to list I2C
+devices which may or may not be present when using
+CONFIG_SYS_POST_I2C_ADDRS.  The I2C POST test will pass regardless
+if the devices in CONFIG_SYS_POST_I2C_IGNORES are found or not.
+This is useful in cases when I2C devices are optional (eg on a
+daughtercard that may or may not be present) or not critical
+to board operation.

 
 2.2.2.2. Watchdog timer test
 
 
 2.2.2.2. Watchdog timer test
 


@@ -713,7 +720,7 @@ use external loopback for testing. That will need appropriate
 reconfiguration of the physical interface chip.
 
 The test routines for the SCC ethernet tests will be located in
 reconfiguration of the physical interface chip.
 
 The test routines for the SCC ethernet tests will be located in

-arch/ppc/cpu/mpc8xx/scc.c.
+arch/powerpc/cpu/mpc8xx/scc.c.

 
 2.2.3.2. UART tests (SMC/SCC)
 
 
 2.2.3.2. UART tests (SMC/SCC)
 


@@ -725,7 +732,7 @@ will be transmitted. These tests may be enhanced to make to perform
 test will be executed manually.
 
 The test routine for the SMC/SCC UART tests will be located in
 test will be executed manually.
 
 The test routine for the SMC/SCC UART tests will be located in

-arch/ppc/cpu/mpc8xx/serial.c.
+arch/powerpc/cpu/mpc8xx/serial.c.

 
 2.2.3.3. USB test
 
 
 2.2.3.3. USB test