46 	struct hd44780 *hd = lcd->drvdata;  in hd44780_backlight()  local
48 	if (hd->pins[PIN_CTRL_BL])  in hd44780_backlight()
49 		gpiod_set_value_cansleep(hd->pins[PIN_CTRL_BL], on);  in hd44780_backlight()
52 static void hd44780_strobe_gpio(struct hd44780 *hd)  in hd44780_strobe_gpio()  argument
57 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 1);  in hd44780_strobe_gpio()
62 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 0);  in hd44780_strobe_gpio()
66 static void hd44780_write_gpio8(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio8()  argument
75 	if (hd->pins[PIN_CTRL_RW]) {  in hd44780_write_gpio8()
81 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA0], values);  in hd44780_write_gpio8()
83 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio8()
87 static void hd44780_write_gpio4(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio4()  argument
97 	if (hd->pins[PIN_CTRL_RW]) {  in hd44780_write_gpio4()
103 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],  in hd44780_write_gpio4()
106 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
113 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],  in hd44780_write_gpio4()
116 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
122 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_gpio8()  local
124 	hd44780_write_gpio8(hd, cmd, 0);  in hd44780_write_cmd_gpio8()
133 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_data_gpio8()  local
135 	hd44780_write_gpio8(hd, data, 1);  in hd44780_write_data_gpio8()
150 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_gpio4()  local
152 	hd44780_write_gpio4(hd, cmd, 0);  in hd44780_write_cmd_gpio4()
162 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_raw_gpio4()  local
170 	if (hd->pins[PIN_CTRL_RW]) {  in hd44780_write_cmd_raw_gpio4()
176 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],  in hd44780_write_cmd_raw_gpio4()
179 	hd44780_strobe_gpio(hd);  in hd44780_write_cmd_raw_gpio4()
185 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_data_gpio4()  local
187 	hd44780_write_gpio4(hd, data, 1);  in hd44780_write_data_gpio4()
205 	struct hd44780 *hd;  in hd44780_probe()  local
228 	hd = lcd->drvdata;  in hd44780_probe()
231 		hd->pins[base + i] = devm_gpiod_get_index(dev, "data", i,  in hd44780_probe()
233 		if (IS_ERR(hd->pins[base + i])) {  in hd44780_probe()
234 			ret = PTR_ERR(hd->pins[base + i]);  in hd44780_probe()
239 	hd->pins[PIN_CTRL_E] = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);  in hd44780_probe()
240 	if (IS_ERR(hd->pins[PIN_CTRL_E])) {  in hd44780_probe()
241 		ret = PTR_ERR(hd->pins[PIN_CTRL_E]);  in hd44780_probe()
245 	hd->pins[PIN_CTRL_RS] = devm_gpiod_get(dev, "rs", GPIOD_OUT_HIGH);  in hd44780_probe()
246 	if (IS_ERR(hd->pins[PIN_CTRL_RS])) {  in hd44780_probe()
247 		ret = PTR_ERR(hd->pins[PIN_CTRL_RS]);  in hd44780_probe()
252 	hd->pins[PIN_CTRL_RW] = devm_gpiod_get_optional(dev, "rw",  in hd44780_probe()
254 	if (IS_ERR(hd->pins[PIN_CTRL_RW])) {  in hd44780_probe()
255 		ret = PTR_ERR(hd->pins[PIN_CTRL_RW]);  in hd44780_probe()
259 	hd->pins[PIN_CTRL_BL] = devm_gpiod_get_optional(dev, "backlight",  in hd44780_probe()
261 	if (IS_ERR(hd->pins[PIN_CTRL_BL])) {  in hd44780_probe()
262 		ret = PTR_ERR(hd->pins[PIN_CTRL_BL]);  in hd44780_probe()