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Add voltage change delays to dediprog driver

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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.

Corresponding to flashrom svn r1544.

Signed-off-by: Nico Huber <nico.huber@secunet.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
This commit is contained in:
Nico Huber 2012-06-16 00:02:27 +00:00 committed by Carl-Daniel Hailfinger
parent 7bca126561
commit 4099a8a891
1 changed files with 8 additions and 0 deletions
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8
dediprog.c
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@ -131,6 +131,10 @@ static int dediprog_set_spi_voltage(int millivolt)
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 @@ static int dediprog_set_spi_voltage(int millivolt)
voltage_selector);
return 1;
}
if (voltage_selector != 0) {
/* Wait some time as the original driver does. */
programmer_delay(200 * 1000);
}
return 0;
}