diff options
Diffstat (limited to 'flashrom.8')
| -rw-r--r-- | flashrom.8 | 17 |
1 files changed, 13 insertions, 4 deletions
@@ -1,4 +1,4 @@ -.TH FLASHROM 8 "Dec, 2012" +.TH FLASHROM 8 "Jul, 2013" .SH NAME flashrom \- detect, read, write, verify and erase flash chips .SH SYNOPSIS @@ -590,7 +590,9 @@ syntax where is the serial number of the device (which can be found for example in the output of lsusb -v). .sp All models supported by the ft2232_spi driver can configure the SPI clock rate by setting a divisor. The -expressible divisors are all even numbers between 2 and 2^17 (=131072) resulting in SPI clock frequencies of +expressible divisors are all +.B even +numbers between 2 and 2^17 (=131072) resulting in SPI clock frequencies of 6 MHz down to about 92 Hz for 12 MHz inputs. The default divisor is set to 2, but you can use another one by specifying the optional .B divisor @@ -615,12 +617,12 @@ syntax and for IP, you have to use instead. In case the device supports it, you can set the SPI clock frequency with the optional .B spispeed -parameter. The frequency is parsed as Hertz, unless an +parameter. The frequency is parsed as hertz, unless an .BR M ", or " k suffix is given, then megahertz or kilohertz are used respectively. Example that sets the frequency to 2 MHz: .sp -.B "flashrom \-p serprog:dev=/dev/device:baud,spispeed=2M" +.B " flashrom \-p serprog:dev=/dev/device:baud,spispeed=2M" .sp More information about serprog is available in .B serprog-protocol.txt @@ -797,6 +799,13 @@ syntax where .B /dev/spidevX.Y is the Linux device node for your SPI controller. .sp +In case the device supports it, you can set the SPI clock frequency with the optional +.B spispeed +parameter. The frequency is parsed as kilohertz. +Example that sets the frequency to 8 MHz: +.sp +.B " flashrom \-p linux_spi:dev=/dev/spidevX.Y,spispeed=8000" +.sp Please note that the linux_spi driver only works on Linux. .SH EXAMPLES To back up and update your BIOS, run |
