42 	struct hd44780 *hd = lcd->drvdata;  in hd44780_backlight()  local
44 	if (hd->pins[PIN_CTRL_BL])  in hd44780_backlight()
45 		gpiod_set_value_cansleep(hd->pins[PIN_CTRL_BL], on);  in hd44780_backlight()
48 static void hd44780_strobe_gpio(struct hd44780 *hd)  in hd44780_strobe_gpio()  argument
53 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 1);  in hd44780_strobe_gpio()
58 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 0);  in hd44780_strobe_gpio()
62 static void hd44780_write_gpio8(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio8()  argument
69 	n = hd->pins[PIN_CTRL_RW] ? 10 : 9;  in hd44780_write_gpio8()
72 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA0], NULL, values);  in hd44780_write_gpio8()
74 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio8()
78 static void hd44780_write_gpio4(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio4()  argument
86 	n = hd->pins[PIN_CTRL_RW] ? 6 : 5;  in hd44780_write_gpio4()
89 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);  in hd44780_write_gpio4()
91 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
98 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);  in hd44780_write_gpio4()
100 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
106 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_gpio8()  local
108 	hd44780_write_gpio8(hd, cmd, 0);  in hd44780_write_cmd_gpio8()
117 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_data_gpio8()  local
119 	hd44780_write_gpio8(hd, data, 1);  in hd44780_write_data_gpio8()
134 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_gpio4()  local
136 	hd44780_write_gpio4(hd, cmd, 0);  in hd44780_write_cmd_gpio4()
146 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_raw_gpio4()  local
151 	n = hd->pins[PIN_CTRL_RW] ? 6 : 5;  in hd44780_write_cmd_raw_gpio4()
154 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);  in hd44780_write_cmd_raw_gpio4()
156 	hd44780_strobe_gpio(hd);  in hd44780_write_cmd_raw_gpio4()
162 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_data_gpio4()  local
164 	hd44780_write_gpio4(hd, data, 1);  in hd44780_write_data_gpio4()
182 	struct hd44780 *hd;  in hd44780_probe()  local
205 	hd = lcd->drvdata;  in hd44780_probe()
208 		hd->pins[base + i] = devm_gpiod_get_index(dev, "data", i,  in hd44780_probe()
210 		if (IS_ERR(hd->pins[base + i])) {  in hd44780_probe()
211 			ret = PTR_ERR(hd->pins[base + i]);  in hd44780_probe()
216 	hd->pins[PIN_CTRL_E] = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);  in hd44780_probe()
217 	if (IS_ERR(hd->pins[PIN_CTRL_E])) {  in hd44780_probe()
218 		ret = PTR_ERR(hd->pins[PIN_CTRL_E]);  in hd44780_probe()
222 	hd->pins[PIN_CTRL_RS] = devm_gpiod_get(dev, "rs", GPIOD_OUT_HIGH);  in hd44780_probe()
223 	if (IS_ERR(hd->pins[PIN_CTRL_RS])) {  in hd44780_probe()
224 		ret = PTR_ERR(hd->pins[PIN_CTRL_RS]);  in hd44780_probe()
229 	hd->pins[PIN_CTRL_RW] = devm_gpiod_get_optional(dev, "rw",  in hd44780_probe()
231 	if (IS_ERR(hd->pins[PIN_CTRL_RW])) {  in hd44780_probe()
232 		ret = PTR_ERR(hd->pins[PIN_CTRL_RW]);  in hd44780_probe()
236 	hd->pins[PIN_CTRL_BL] = devm_gpiod_get_optional(dev, "backlight",  in hd44780_probe()
238 	if (IS_ERR(hd->pins[PIN_CTRL_BL])) {  in hd44780_probe()
239 		ret = PTR_ERR(hd->pins[PIN_CTRL_BL]);  in hd44780_probe()