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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2017-03-10 17:15:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-17 09:10:49 +0300 |
| commit | ac201479cc695cb0140e425b9ca8ab2ecdcd2f0d (patch) | |
| tree | 78929b3866d2bc0af026c538cd20b72de477c5da /include/linux/irq_work.h | |
| parent | 39f8ea46724efbed3ca021863a22337c31be264c (diff) | |
| download | linux-ac201479cc695cb0140e425b9ca8ab2ecdcd2f0d.tar.xz | |
auxdisplay: charlcd: Add support for 4-bit interfaces
In 4-bit mode, 8-bit commands and data are written using two raw writes
to the data interface: high nibble first, low nibble last. This must be
handled by the low-level driver.
However, as we don't know in which mode (4-bit or 8-bit) nor 4-bit phase
the LCD was left, initialization must always be handled using raw
writes, and needs to configure the LCD for 8-bit mode first.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/irq_work.h')
0 files changed, 0 insertions, 0 deletions