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/openbmc/linux/drivers/tty/serial/8250/ |
H A D | 8250_core.c | f01a0bd8 Mon Mar 09 13:05:01 CDT 2015 Peter Hurley <peter@hurleysoftware.com> serial: 8250: Check UART_SCR is writable
Au1x00/RT2800+ doesn't implement the 8250 scratch register (and this may be true of other h/w currently supported by the 8250 driver); read back the canary value written to the scratch register to enable the console h/w restart after resume from system suspend.
Fixes: 4516d50aabedb ("serial: 8250: Use canary to restart console ...") Reported-by: Mason <slash.tmp@free.fr> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> f01a0bd8 Mon Mar 09 13:05:01 CDT 2015 Peter Hurley <peter@hurleysoftware.com> serial: 8250: Check UART_SCR is writable Au1x00/RT2800+ doesn't implement the 8250 scratch register (and this may be true of other h/w currently supported by the 8250 driver); read back the canary value written to the scratch register to enable the console h/w restart after resume from system suspend. Fixes: 4516d50aabedb ("serial: 8250: Use canary to restart console ...") Reported-by: Mason <slash.tmp@free.fr> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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