31 struct ts_nbus {  struct
45 static int ts_nbus_init_pdata(struct platform_device *pdev, struct ts_nbus  in ts_nbus_init_pdata()  argument
46 		*ts_nbus)  in ts_nbus_init_pdata()
48 	ts_nbus->data = devm_gpiod_get_array(&pdev->dev, "ts,data",  in ts_nbus_init_pdata()
50 	if (IS_ERR(ts_nbus->data)) {  in ts_nbus_init_pdata()
52 		return PTR_ERR(ts_nbus->data);  in ts_nbus_init_pdata()
55 	ts_nbus->csn = devm_gpiod_get(&pdev->dev, "ts,csn", GPIOD_OUT_HIGH);  in ts_nbus_init_pdata()
56 	if (IS_ERR(ts_nbus->csn)) {  in ts_nbus_init_pdata()
58 		return PTR_ERR(ts_nbus->csn);  in ts_nbus_init_pdata()
61 	ts_nbus->txrx = devm_gpiod_get(&pdev->dev, "ts,txrx", GPIOD_OUT_HIGH);  in ts_nbus_init_pdata()
62 	if (IS_ERR(ts_nbus->txrx)) {  in ts_nbus_init_pdata()
64 		return PTR_ERR(ts_nbus->txrx);  in ts_nbus_init_pdata()
67 	ts_nbus->strobe = devm_gpiod_get(&pdev->dev, "ts,strobe", GPIOD_OUT_HIGH);  in ts_nbus_init_pdata()
68 	if (IS_ERR(ts_nbus->strobe)) {  in ts_nbus_init_pdata()
70 		return PTR_ERR(ts_nbus->strobe);  in ts_nbus_init_pdata()
73 	ts_nbus->ale = devm_gpiod_get(&pdev->dev, "ts,ale", GPIOD_OUT_HIGH);  in ts_nbus_init_pdata()
74 	if (IS_ERR(ts_nbus->ale)) {  in ts_nbus_init_pdata()
76 		return PTR_ERR(ts_nbus->ale);  in ts_nbus_init_pdata()
79 	ts_nbus->rdy = devm_gpiod_get(&pdev->dev, "ts,rdy", GPIOD_IN);  in ts_nbus_init_pdata()
80 	if (IS_ERR(ts_nbus->rdy)) {  in ts_nbus_init_pdata()
82 		return PTR_ERR(ts_nbus->rdy);  in ts_nbus_init_pdata()
92 static void ts_nbus_set_direction(struct ts_nbus *ts_nbus, int direction)  in ts_nbus_set_direction()  argument
98 			gpiod_direction_input(ts_nbus->data->desc[i]);  in ts_nbus_set_direction()
102 			gpiod_direction_output(ts_nbus->data->desc[i], 1);  in ts_nbus_set_direction()
111 static void ts_nbus_reset_bus(struct ts_nbus *ts_nbus)  in ts_nbus_reset_bus()  argument
117 	gpiod_set_array_value_cansleep(8, ts_nbus->data->desc,  in ts_nbus_reset_bus()
118 				       ts_nbus->data->info, values);  in ts_nbus_reset_bus()
119 	gpiod_set_value_cansleep(ts_nbus->csn, 0);  in ts_nbus_reset_bus()
120 	gpiod_set_value_cansleep(ts_nbus->strobe, 0);  in ts_nbus_reset_bus()
121 	gpiod_set_value_cansleep(ts_nbus->ale, 0);  in ts_nbus_reset_bus()
127 static void ts_nbus_start_transaction(struct ts_nbus *ts_nbus)  in ts_nbus_start_transaction()  argument
129 	gpiod_set_value_cansleep(ts_nbus->strobe, 1);  in ts_nbus_start_transaction()
136 static int ts_nbus_read_byte(struct ts_nbus *ts_nbus, u8 *val)  in ts_nbus_read_byte()  argument
138 	struct gpio_descs *gpios = ts_nbus->data;  in ts_nbus_read_byte()
156 static void ts_nbus_write_byte(struct ts_nbus *ts_nbus, u8 byte)  in ts_nbus_write_byte()  argument
158 	struct gpio_descs *gpios = ts_nbus->data;  in ts_nbus_write_byte()
171 static int ts_nbus_read_bus(struct ts_nbus *ts_nbus, u8 *val)  in ts_nbus_read_bus()  argument
173 	ts_nbus_reset_bus(ts_nbus);  in ts_nbus_read_bus()
174 	ts_nbus_start_transaction(ts_nbus);  in ts_nbus_read_bus()
176 	return ts_nbus_read_byte(ts_nbus, val);  in ts_nbus_read_bus()
184 static void ts_nbus_write_bus(struct ts_nbus *ts_nbus, int cmd, u8 val)  in ts_nbus_write_bus()  argument
186 	ts_nbus_reset_bus(ts_nbus);  in ts_nbus_write_bus()
189 		gpiod_set_value_cansleep(ts_nbus->ale, 1);  in ts_nbus_write_bus()
191 	ts_nbus_write_byte(ts_nbus, val);  in ts_nbus_write_bus()
192 	ts_nbus_start_transaction(ts_nbus);  in ts_nbus_write_bus()
199 int ts_nbus_read(struct ts_nbus *ts_nbus, u8 adr, u16 *val)  in ts_nbus_read()  argument
205 	mutex_lock(&ts_nbus->lock);  in ts_nbus_read()
208 	gpiod_set_value_cansleep(ts_nbus->txrx, 0);  in ts_nbus_read()
211 	ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_ADR, adr);  in ts_nbus_read()
214 	ts_nbus_set_direction(ts_nbus, TS_NBUS_DIRECTION_IN);  in ts_nbus_read()
222 			ret = ts_nbus_read_bus(ts_nbus, &byte);  in ts_nbus_read()
229 		gpiod_set_value_cansleep(ts_nbus->csn, 1);  in ts_nbus_read()
230 		ret = gpiod_get_value_cansleep(ts_nbus->rdy);  in ts_nbus_read()
235 	ts_nbus_set_direction(ts_nbus, TS_NBUS_DIRECTION_OUT);  in ts_nbus_read()
237 	mutex_unlock(&ts_nbus->lock);  in ts_nbus_read()
246 int ts_nbus_write(struct ts_nbus *ts_nbus, u8 adr, u16 val)  in ts_nbus_write()  argument
251 	mutex_lock(&ts_nbus->lock);  in ts_nbus_write()
254 	gpiod_set_value_cansleep(ts_nbus->txrx, 1);  in ts_nbus_write()
257 	ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_ADR, adr);  in ts_nbus_write()
261 		ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_VAL, (u8)(val >> (i * 8)));  in ts_nbus_write()
264 	gpiod_set_value_cansleep(ts_nbus->csn, 1);  in ts_nbus_write()
265 	while (gpiod_get_value_cansleep(ts_nbus->rdy) != 0) {  in ts_nbus_write()
266 		gpiod_set_value_cansleep(ts_nbus->csn, 0);  in ts_nbus_write()
267 		gpiod_set_value_cansleep(ts_nbus->csn, 1);  in ts_nbus_write()
270 	mutex_unlock(&ts_nbus->lock);  in ts_nbus_write()
281 	struct ts_nbus *ts_nbus;  in ts_nbus_probe()  local
284 	ts_nbus = devm_kzalloc(dev, sizeof(*ts_nbus), GFP_KERNEL);  in ts_nbus_probe()
285 	if (!ts_nbus)  in ts_nbus_probe()
288 	mutex_init(&ts_nbus->lock);  in ts_nbus_probe()
290 	ret = ts_nbus_init_pdata(pdev, ts_nbus);  in ts_nbus_probe()
321 	ts_nbus->pwm = pwm;  in ts_nbus_probe()
326 	dev_set_drvdata(dev, ts_nbus);  in ts_nbus_probe()
339 	struct ts_nbus *ts_nbus = dev_get_drvdata(&pdev->dev);  in ts_nbus_remove()  local
342 	mutex_lock(&ts_nbus->lock);  in ts_nbus_remove()
343 	pwm_disable(ts_nbus->pwm);  in ts_nbus_remove()
344 	mutex_unlock(&ts_nbus->lock);  in ts_nbus_remove()