diff options
| author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2008-09-30 20:08:36 +0200 |
|---|---|---|
| committer | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2008-10-08 18:59:04 +0200 |
| commit | 77a0355f60b801f232ce0a5bfbe95331fa3b6bc0 (patch) | |
| tree | 9285b86f451c0b9c878ccbd916baf49a5823da1c /doc | |
| parent | 1ed7a7f0f571b13d46530f8f8b9aff3957f15a96 (diff) | |
move README.imx31 to doc/ and merge with README.mx31
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.imx31 | 29 | ||||
| -rw-r--r-- | doc/README.mx31 | 17 |
2 files changed, 29 insertions, 17 deletions
diff --git a/doc/README.imx31 b/doc/README.imx31 new file mode 100644 index 0000000000..91ef766884 --- /dev/null +++ b/doc/README.imx31 @@ -0,0 +1,29 @@ +U-Boot for Freescale i.MX31 + +This file contains information for the port of U-Boot to the Freescale +i.MX31 SoC. + +1. CONFIGURATION OPTIONS/SETTINGS +--------------------------------- + +1.1 Configuration of MC13783 SPI bus +------------------------------------ + The power management companion chip MC13783 is connected to the + i.MX31 via an SPI bus. Use the following configuration options + to setup the bus and chip select used for a particular board. + + CONFIG_MC13783_SPI_BUS -- defines the SPI bus the MC13783 is connected to. + Note that 0 is CSPI1, 1 is CSPI2 and 2 is CSPI3. + CONFIG_MC13783_SPI_CS -- define the chip select the MC13783 s connected to. + +1.2 Timer precision +------------------- + CONFIG_MX31_TIMER_HIGH_PRECISION + + Enable higher precision timer. The low-precision timer + (default) provides approximately 4% error, whereas the + high-precision timer is about 0.4% accurate. The extra + accuracy is achieved at the cost of higher computational + overhead, which, in places where time is measured, should + not be critical, so, it should be safe to enable this + option. diff --git a/doc/README.mx31 b/doc/README.mx31 deleted file mode 100644 index 291c2f31b9..0000000000 --- a/doc/README.mx31 +++ /dev/null @@ -1,17 +0,0 @@ -U-Boot for Freescale i.MX31 - -This file contains information for the port of U-Boot to the Freescale -i.MX31 SoC. - -1. CONFIGURATION OPTIONS/SETTINGS ---------------------------------- - -1.1 Configuration of MC13783 SPI bus ------------------------------------- -The power management companion chip MC13783 is connected to the -i.MX31 via an SPI bus. Use the following configuration options -to setup the bus and chip select used for a particular board. - -CONFIG_MC13783_SPI_BUS -- defines the SPI bus the MC13783 is connected to. - Note that 0 is CSPI1, 1 is CSPI2 and 2 is CSPI3. -CONFIG_MC13783_SPI_CS -- define the chip select the MC13783 s connected to. |