serial: samsung: wait for transfer completion before clock disable

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commit 1ff383a4c3 upstream.

This patch adds waiting until transmit buffer and shifter will be empty
before clock disabling.

Without this fix it's possible to have clock disabled while data was
not transmited yet, which causes unproper state of TX line and problems
in following data transfers.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Robert Baldyga 2014-11-24 07:56:21 +01:00 • committed by Luis Henriques

parent a0f76a5e9b

commit 3fc6bca58b

1 changed files with 4 additions and 0 deletions

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drivers/tty/serial/samsung.c

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