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| author | Lars Poeschel <poeschel@lemonage.de> | 2020-11-03 10:58:11 +0100 |
|---|---|---|
| committer | Miguel Ojeda <ojeda@kernel.org> | 2020-11-04 11:04:03 +0100 |
| commit | b26deabb1d915fe87d395081bbd3058b938dee89 (patch) | |
| tree | ea623cab5ff65fe59f1e514c85ea41692e0bb5e6 /drivers/auxdisplay/hd44780_common.c | |
| parent | 11588b59cf620305e78523f57918b986b5e32214 (diff) | |
| download | lwn-b26deabb1d915fe87d395081bbd3058b938dee89.tar.gz lwn-b26deabb1d915fe87d395081bbd3058b938dee89.zip | |
auxdisplay: hd44780_common_print
We create a hd44780_common_print function. It is derived from the
original charlcd_print. charlcd_print becomes a device independent print
function, that then only calls via its ops function pointers, into the
print function offered by drivers.
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'drivers/auxdisplay/hd44780_common.c')
| -rw-r--r-- | drivers/auxdisplay/hd44780_common.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/auxdisplay/hd44780_common.c b/drivers/auxdisplay/hd44780_common.c index 4968461f0c4a..1dfcb2cdbc70 100644 --- a/drivers/auxdisplay/hd44780_common.c +++ b/drivers/auxdisplay/hd44780_common.c @@ -2,8 +2,22 @@ #include <linux/module.h> #include <linux/slab.h> +#include "charlcd.h" #include "hd44780_common.h" +int hd44780_common_print(struct charlcd *lcd, int c) +{ + struct hd44780_common *hdc = lcd->drvdata; + + if (lcd->addr.x < hdc->bwidth) { + hdc->write_data(hdc, c); + return 0; + } + + return 1; +} +EXPORT_SYMBOL_GPL(hd44780_common_print); + struct hd44780_common *hd44780_common_alloc(void) { struct hd44780_common *hd; |