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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>
37 lines
690 B
C
37 lines
690 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "charlcd.h"
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#include "hd44780_common.h"
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int hd44780_common_print(struct charlcd *lcd, int c)
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{
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struct hd44780_common *hdc = lcd->drvdata;
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if (lcd->addr.x < hdc->bwidth) {
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hdc->write_data(hdc, c);
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return 0;
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}
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return 1;
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}
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EXPORT_SYMBOL_GPL(hd44780_common_print);
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struct hd44780_common *hd44780_common_alloc(void)
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{
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struct hd44780_common *hd;
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hd = kzalloc(sizeof(*hd), GFP_KERNEL);
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if (!hd)
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return NULL;
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hd->ifwidth = 8;
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hd->bwidth = DEFAULT_LCD_BWIDTH;
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hd->hwidth = DEFAULT_LCD_HWIDTH;
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return hd;
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}
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EXPORT_SYMBOL_GPL(hd44780_common_alloc);
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MODULE_LICENSE("GPL");
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