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