Author: hailfinger Date: Sat Jun 16 02:02:27 2012 New Revision: 1544 URL: http://flashrom.org/trac/flashrom/changeset/1544
Log: Add voltage change delays to dediprog driver
Some investigations have shown that the original dediprog driver waits about 200ms after setting voltage up and before setting voltage down. This patch adds those delays. It helps flash chips to come up in time.
Signed-off-by: Nico Huber nico.huber@secunet.com Acked-by: Carl-Daniel Hailfinger c-d.hailfinger.devel.2006@gmx.net
Modified: trunk/dediprog.c
Modified: trunk/dediprog.c ============================================================================== --- trunk/dediprog.c Sat Jun 16 00:28:12 2012 (r1543) +++ trunk/dediprog.c Sat Jun 16 02:02:27 2012 (r1544) @@ -131,6 +131,10 @@ msg_pdbg("Setting SPI voltage to %u.%03u V\n", millivolt / 1000, millivolt % 1000);
+ if (voltage_selector == 0) { + /* Wait some time as the original driver does. */ + programmer_delay(200 * 1000); + } ret = usb_control_msg(dediprog_handle, 0x42, 0x9, voltage_selector, 0xff, NULL, 0x0, DEFAULT_TIMEOUT); if (ret != 0x0) { @@ -138,6 +142,10 @@ voltage_selector); return 1; } + if (voltage_selector != 0) { + /* Wait some time as the original driver does. */ + programmer_delay(200 * 1000); + } return 0; }