43 	struct hd44780 *hd = lcd->drvdata;  in hd44780_backlight()  local
45 	if (hd->pins[PIN_CTRL_BL])  in hd44780_backlight()
46 		gpiod_set_value_cansleep(hd->pins[PIN_CTRL_BL], on);  in hd44780_backlight()
49 static void hd44780_strobe_gpio(struct hd44780 *hd)  in hd44780_strobe_gpio()  argument
54 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 1);  in hd44780_strobe_gpio()
59 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 0);  in hd44780_strobe_gpio()
63 static void hd44780_write_gpio8(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio8()  argument
72 	if (hd->pins[PIN_CTRL_RW]) {  in hd44780_write_gpio8()
78 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA0], values);  in hd44780_write_gpio8()
80 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio8()
84 static void hd44780_write_gpio4(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio4()  argument
94 	if (hd->pins[PIN_CTRL_RW]) {  in hd44780_write_gpio4()
100 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],  in hd44780_write_gpio4()
103 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
110 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],  in hd44780_write_gpio4()
113 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
119 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_gpio8()  local
121 	hd44780_write_gpio8(hd, cmd, 0);  in hd44780_write_cmd_gpio8()
130 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_data_gpio8()  local
132 	hd44780_write_gpio8(hd, data, 1);  in hd44780_write_data_gpio8()
147 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_gpio4()  local
149 	hd44780_write_gpio4(hd, cmd, 0);  in hd44780_write_cmd_gpio4()
159 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_cmd_raw_gpio4()  local
167 	if (hd->pins[PIN_CTRL_RW]) {  in hd44780_write_cmd_raw_gpio4()
173 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],  in hd44780_write_cmd_raw_gpio4()
176 	hd44780_strobe_gpio(hd);  in hd44780_write_cmd_raw_gpio4()
182 	struct hd44780 *hd = lcd->drvdata;  in hd44780_write_data_gpio4()  local
184 	hd44780_write_gpio4(hd, data, 1);  in hd44780_write_data_gpio4()
202 	struct hd44780 *hd;  in hd44780_probe()  local
225 	hd = lcd->drvdata;  in hd44780_probe()
228 		hd->pins[base + i] = devm_gpiod_get_index(dev, "data", i,  in hd44780_probe()
230 		if (IS_ERR(hd->pins[base + i])) {  in hd44780_probe()
231 			ret = PTR_ERR(hd->pins[base + i]);  in hd44780_probe()
236 	hd->pins[PIN_CTRL_E] = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);  in hd44780_probe()
237 	if (IS_ERR(hd->pins[PIN_CTRL_E])) {  in hd44780_probe()
238 		ret = PTR_ERR(hd->pins[PIN_CTRL_E]);  in hd44780_probe()
242 	hd->pins[PIN_CTRL_RS] = devm_gpiod_get(dev, "rs", GPIOD_OUT_HIGH);  in hd44780_probe()
243 	if (IS_ERR(hd->pins[PIN_CTRL_RS])) {  in hd44780_probe()
244 		ret = PTR_ERR(hd->pins[PIN_CTRL_RS]);  in hd44780_probe()
249 	hd->pins[PIN_CTRL_RW] = devm_gpiod_get_optional(dev, "rw",  in hd44780_probe()
251 	if (IS_ERR(hd->pins[PIN_CTRL_RW])) {  in hd44780_probe()
252 		ret = PTR_ERR(hd->pins[PIN_CTRL_RW]);  in hd44780_probe()
256 	hd->pins[PIN_CTRL_BL] = devm_gpiod_get_optional(dev, "backlight",  in hd44780_probe()
258 	if (IS_ERR(hd->pins[PIN_CTRL_BL])) {  in hd44780_probe()
259 		ret = PTR_ERR(hd->pins[PIN_CTRL_BL]);  in hd44780_probe()