44 	struct hd44780 *hd = hdc->hd44780;  in hd44780_backlight()  local
46 	if (hd->pins[PIN_CTRL_BL])  in hd44780_backlight()
47 		gpiod_set_value_cansleep(hd->pins[PIN_CTRL_BL], on);  in hd44780_backlight()
50 static void hd44780_strobe_gpio(struct hd44780 *hd)  in hd44780_strobe_gpio()  argument
55 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 1);  in hd44780_strobe_gpio()
60 	gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 0);  in hd44780_strobe_gpio()
64 static void hd44780_write_gpio8(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio8()  argument
71 	n = hd->pins[PIN_CTRL_RW] ? 10 : 9;  in hd44780_write_gpio8()
74 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA0], NULL, values);  in hd44780_write_gpio8()
76 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio8()
80 static void hd44780_write_gpio4(struct hd44780 *hd, u8 val, unsigned int rs)  in hd44780_write_gpio4()  argument
88 	n = hd->pins[PIN_CTRL_RW] ? 6 : 5;  in hd44780_write_gpio4()
91 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);  in hd44780_write_gpio4()
93 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
100 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);  in hd44780_write_gpio4()
102 	hd44780_strobe_gpio(hd);  in hd44780_write_gpio4()
108 	struct hd44780 *hd = hdc->hd44780;  in hd44780_write_cmd_gpio8()  local
110 	hd44780_write_gpio8(hd, cmd, 0);  in hd44780_write_cmd_gpio8()
119 	struct hd44780 *hd = hdc->hd44780;  in hd44780_write_data_gpio8()  local
121 	hd44780_write_gpio8(hd, data, 1);  in hd44780_write_data_gpio8()
147 	struct hd44780 *hd = hdc->hd44780;  in hd44780_write_cmd_gpio4()  local
149 	hd44780_write_gpio4(hd, cmd, 0);  in hd44780_write_cmd_gpio4()
159 	struct hd44780 *hd = hdc->hd44780;  in hd44780_write_cmd_raw_gpio4()  local
164 	n = hd->pins[PIN_CTRL_RW] ? 6 : 5;  in hd44780_write_cmd_raw_gpio4()
167 	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);  in hd44780_write_cmd_raw_gpio4()
169 	hd44780_strobe_gpio(hd);  in hd44780_write_cmd_raw_gpio4()
175 	struct hd44780 *hd = hdc->hd44780;  in hd44780_write_data_gpio4()  local
177 	hd44780_write_gpio4(hd, data, 1);  in hd44780_write_data_gpio4()
206 	struct hd44780 *hd;  in hd44780_probe()  local
233 	hd = kzalloc(sizeof(*hd), GFP_KERNEL);  in hd44780_probe()
234 	if (!hd)  in hd44780_probe()
237 	hdc->hd44780 = hd;  in hd44780_probe()
240 		hd->pins[base + i] = devm_gpiod_get_index(dev, "data", i,  in hd44780_probe()
242 		if (IS_ERR(hd->pins[base + i])) {  in hd44780_probe()
243 			ret = PTR_ERR(hd->pins[base + i]);  in hd44780_probe()
248 	hd->pins[PIN_CTRL_E] = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);  in hd44780_probe()
249 	if (IS_ERR(hd->pins[PIN_CTRL_E])) {  in hd44780_probe()
250 		ret = PTR_ERR(hd->pins[PIN_CTRL_E]);  in hd44780_probe()
254 	hd->pins[PIN_CTRL_RS] = devm_gpiod_get(dev, "rs", GPIOD_OUT_HIGH);  in hd44780_probe()
255 	if (IS_ERR(hd->pins[PIN_CTRL_RS])) {  in hd44780_probe()
256 		ret = PTR_ERR(hd->pins[PIN_CTRL_RS]);  in hd44780_probe()
261 	hd->pins[PIN_CTRL_RW] = devm_gpiod_get_optional(dev, "rw",  in hd44780_probe()
263 	if (IS_ERR(hd->pins[PIN_CTRL_RW])) {  in hd44780_probe()
264 		ret = PTR_ERR(hd->pins[PIN_CTRL_RW]);  in hd44780_probe()
268 	hd->pins[PIN_CTRL_BL] = devm_gpiod_get_optional(dev, "backlight",  in hd44780_probe()
270 	if (IS_ERR(hd->pins[PIN_CTRL_BL])) {  in hd44780_probe()
271 		ret = PTR_ERR(hd->pins[PIN_CTRL_BL]);  in hd44780_probe()
314 	kfree(hd);  in hd44780_probe()