hd44780.c (3fc04dd7eb77b54228a17753ec01128417433e46) hd44780.c (71ff701bbefec9e3c342f3a01d2d89b7ae026c71)
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * HD44780 Character LCD driver for Linux
4 *
5 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
6 * Copyright (C) 2016-2017 Glider bvba
7 */
8

--- 101 unchanged lines hidden (view full) ---

110
111 hd44780_write_gpio8(hd, cmd, 0);
112
113 /* The shortest command takes at least 120 us */
114 udelay(120);
115}
116
117/* Send data to the LCD panel in 8 bit GPIO mode */
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * HD44780 Character LCD driver for Linux
4 *
5 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
6 * Copyright (C) 2016-2017 Glider bvba
7 */
8

--- 101 unchanged lines hidden (view full) ---

110
111 hd44780_write_gpio8(hd, cmd, 0);
112
113 /* The shortest command takes at least 120 us */
114 udelay(120);
115}
116
117/* Send data to the LCD panel in 8 bit GPIO mode */
118static void hd44780_write_data_gpio8(struct charlcd *lcd, int data)
118static void hd44780_write_data_gpio8(struct hd44780_common *hdc, int data)
119{
119{
120 struct hd44780_common *hdc = lcd->drvdata;
121 struct hd44780 *hd = hdc->hd44780;
122
123 hd44780_write_gpio8(hd, data, 1);
124
125 /* The shortest data takes at least 45 us */
126 udelay(45);
127}
128
129static const struct charlcd_ops hd44780_ops_gpio8 = {
130 .write_cmd = hd44780_write_cmd_gpio8,
120 struct hd44780 *hd = hdc->hd44780;
121
122 hd44780_write_gpio8(hd, data, 1);
123
124 /* The shortest data takes at least 45 us */
125 udelay(45);
126}
127
128static const struct charlcd_ops hd44780_ops_gpio8 = {
129 .write_cmd = hd44780_write_cmd_gpio8,
131 .write_data = hd44780_write_data_gpio8,
132 .backlight = hd44780_backlight,
133};
134
135/* Send a command to the LCD panel in 4 bit GPIO mode */
136static void hd44780_write_cmd_gpio4(struct charlcd *lcd, int cmd)
137{
138 struct hd44780_common *hdc = lcd->drvdata;
139 struct hd44780 *hd = hdc->hd44780;

--- 18 unchanged lines hidden (view full) ---

158
159 /* Present the data to the port */
160 gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);
161
162 hd44780_strobe_gpio(hd);
163}
164
165/* Send data to the LCD panel in 4 bit GPIO mode */
130 .backlight = hd44780_backlight,
131};
132
133/* Send a command to the LCD panel in 4 bit GPIO mode */
134static void hd44780_write_cmd_gpio4(struct charlcd *lcd, int cmd)
135{
136 struct hd44780_common *hdc = lcd->drvdata;
137 struct hd44780 *hd = hdc->hd44780;

--- 18 unchanged lines hidden (view full) ---

156
157 /* Present the data to the port */
158 gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);
159
160 hd44780_strobe_gpio(hd);
161}
162
163/* Send data to the LCD panel in 4 bit GPIO mode */
166static void hd44780_write_data_gpio4(struct charlcd *lcd, int data)
164static void hd44780_write_data_gpio4(struct hd44780_common *hdc, int data)
167{
165{
168 struct hd44780_common *hdc = lcd->drvdata;
169 struct hd44780 *hd = hdc->hd44780;
170
171 hd44780_write_gpio4(hd, data, 1);
172
173 /* The shortest data takes at least 45 us */
174 udelay(45);
175}
176
177static const struct charlcd_ops hd44780_ops_gpio4 = {
178 .write_cmd = hd44780_write_cmd_gpio4,
179 .write_cmd_raw4 = hd44780_write_cmd_raw_gpio4,
166 struct hd44780 *hd = hdc->hd44780;
167
168 hd44780_write_gpio4(hd, data, 1);
169
170 /* The shortest data takes at least 45 us */
171 udelay(45);
172}
173
174static const struct charlcd_ops hd44780_ops_gpio4 = {
175 .write_cmd = hd44780_write_cmd_gpio4,
176 .write_cmd_raw4 = hd44780_write_cmd_raw_gpio4,
180 .write_data = hd44780_write_data_gpio4,
181 .backlight = hd44780_backlight,
182};
183
184static int hd44780_probe(struct platform_device *pdev)
185{
186 struct device *dev = &pdev->dev;
187 unsigned int i, base;
188 struct charlcd *lcd;

--- 82 unchanged lines hidden (view full) ---

271 */
272 if (lcd->height > 2)
273 hdc->bwidth = lcd->width;
274
275 /* Optional properties */
276 device_property_read_u32(dev, "internal-buffer-width", &hdc->bwidth);
277
278 hdc->ifwidth = ifwidth;
177 .backlight = hd44780_backlight,
178};
179
180static int hd44780_probe(struct platform_device *pdev)
181{
182 struct device *dev = &pdev->dev;
183 unsigned int i, base;
184 struct charlcd *lcd;

--- 82 unchanged lines hidden (view full) ---

267 */
268 if (lcd->height > 2)
269 hdc->bwidth = lcd->width;
270
271 /* Optional properties */
272 device_property_read_u32(dev, "internal-buffer-width", &hdc->bwidth);
273
274 hdc->ifwidth = ifwidth;
279 lcd->ops = ifwidth == 8 ? &hd44780_ops_gpio8 : &hd44780_ops_gpio4;
275 if (ifwidth == 8) {
276 lcd->ops = &hd44780_ops_gpio8;
277 hdc->write_data = hd44780_write_data_gpio8;
278 } else {
279 lcd->ops = &hd44780_ops_gpio4;
280 hdc->write_data = hd44780_write_data_gpio4;
281 }
280
281 ret = charlcd_register(lcd);
282 if (ret)
283 goto fail3;
284
285 platform_set_drvdata(pdev, lcd);
286 return 0;
287

--- 39 unchanged lines hidden --- 		282
283 ret = charlcd_register(lcd);
284 if (ret)
285 goto fail3;
286
287 platform_set_drvdata(pdev, lcd);
288 return 0;
289

--- 39 unchanged lines hidden ---