[flashrom] [PATCH] Fix clock setting in ft2232_spi driver
ilya
ilya at total-knowledge.com
Thu Jun 14 14:39:25 CEST 2012
Hello,
Looks like set clock divisor command was called with random values
for divisor itself.
Patch below fixes it. Now my calls to flashrom work much faster :)
Signed-off-by: Ilya A. Volynets-Evenbakh <ilya at total-knowledge.com>
Index: ft2232_spi.c
===================================================================
--- ft2232_spi.c (revision 1541)
+++ ft2232_spi.c (working copy)
@@ -325,12 +354,12 @@
msg_pdbg("Set clock divisor\n");
buf[0] = 0x86; /* command "set divisor" */
+ buf[1] = (divisor / 2 - 1) & 0xff;
+ buf[2] = ((divisor / 2 - 1) >> 8) & 0xff;
if (send_buf(ftdic, buf, 3)) {
ret = -6;
goto ftdi_err;
}
- buf[1] = (divisor / 2 - 1) & 0xff;
- buf[2] = ((divisor / 2 - 1) >> 8) & 0xff;
msg_pdbg("MPSSE clock: %f MHz, divisor: %u, SPI clock: %f MHz\n",
mpsse_clk, divisor, (double)(mpsse_clk / divisor));
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