diff options
| author | Matt Porter <mporter@ti.com> | 2012-05-07 16:49:21 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-05-15 08:31:41 +0200 |
| commit | a3c3fabb0f65455068e01197e16927f0589beaa2 (patch) | |
| tree | 1b6d04f49c674210f8f6e6abe83627d3d088b846 /doc/README.autoboot | |
| parent | c176dd0442c40d4e98c86848091f628707f9c50a (diff) | |
arm, omap3: fix warm reset serial output on OMAP36xx/AM/DM37xx
In warm reset conditions on OMAP36xx/AM/DM37xx the rom code
incorrectly sets the DPLL4 clock input divider to /6.5 which
is an invalid value unless the input clock is 13MHz. When a JTAG
emulator is attached, a warm reset is necessary after the emulator
gains control of the process. This results in a loss of serial
output due to the invalid DPLL4 settings.
This patch fixes the issue by resetting the DPLL4 clock input
divider to /1 when the input clock is not 13MHz. AM/DM37x TRM
section 3.5.3.3.3.2.1 specifies that the /6.5 setting is only
used when the input clock is 13MHz.
Signed-off-by: Matt Porter <mporter@ti.com>
Diffstat (limited to 'doc/README.autoboot')
0 files changed, 0 insertions, 0 deletions