[S] Change in flashrom[main]: classic_cli_manpage.rst: Update doc for custom_rst of raiden_debug_spi

[Anastasia Klimchuk (Code Review)]

Anastasia Klimchuk has submitted this change. ( https://review.coreboot.org/c/flashrom/+/81114?usp=email )

Change subject: classic_cli_manpage.rst: Update doc for custom_rst of raiden_debug_spi
......................................................................

classic_cli_manpage.rst: Update doc for custom_rst of raiden_debug_spi

Update technical details for custom_rst of raiden_debug_spi to help
users better understand their configuration options.

BUG=b:161745002
BRANCH=none
TEST=`meson compile -C testdir` and
     view ./testdir/doc/html/classic_cli_manpage.html

Change-Id: Ie2b084a3ed9bf40f91bfa81dbc95ec69d99d5ad0
Signed-off-by: Hsuan Ting Chen 
Reviewed-on: https://review.coreboot.org/c/flashrom/+/81114
Reviewed-by: Anastasia Klimchuk 
Tested-by: build bot (Jenkins) 
---
M doc/classic_cli_manpage.rst
1 file changed, 10 insertions(+), 2 deletions(-)

Approvals:
  Anastasia Klimchuk: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/doc/classic_cli_manpage.rst b/doc/classic_cli_manpage.rst
index c46edf6..f40d19e 100644
--- a/doc/classic_cli_manpage.rst
+++ b/doc/classic_cli_manpage.rst
@@ -899,11 +899,19 @@
 The servo device serial number can be found via ``lsusb``.
 Raiden will poll the ``ap`` target waiting for the system power to settle on the AP and EC flash devices.

-The optional ``custom_rst=true`` parameter changes the timeout value from 3ms to 10ms::
+The optional ``custom_rst=true`` parameter alters the behavior of the reset process::

flashrom -p raiden_debug_spi:custom_rst=<true|false>

-syntax, where ``custom_rst=false`` is the implicit default timeout of 3ms. More information about the ChromiumOS servo
+syntax, where:
+
+``custom_rst=false`` is the implicit default timeout of 3ms
+
+and ``custom_rst=true`` set ``RAIDEN_DEBUG_SPI_REQ_ENABLE_AP_CUSTOM`` instead of ``RAIDEN_DEBUG_SPI_REQ_ENABLE_AP``.
+This custom reset will modify the timeout from 3ms to 10ms and will not set ``EC_RST_L``, meaning neither the EC nor the AP will be reset. With this setting, it's the user's responsibility to manage the reset signal manually or by configuring the GPIO.
+Failure to handle the reset signal appropriately will likely result in flashing errors.
+
+More information about the ChromiumOS servo
 hardware is available at `servos website https://chromium.googlesource.com/chromiumos/third_party/hdctools/+/HEAD/docs/servo_v4.md`_.