55 static int sc18is602_wait_ready(struct sc18is602 *hw, int len)  in sc18is602_wait_ready()  argument
58 	int usecs = 1000000 * len / hw->speed + 1;  in sc18is602_wait_ready()
62 		err = i2c_master_recv(hw->client, dummy, 1);  in sc18is602_wait_ready()
70 static int sc18is602_txrx(struct sc18is602 *hw, struct spi_message *msg,  in sc18is602_txrx()  argument
76 	if (hw->tlen == 0) {  in sc18is602_txrx()
78 		hw->buffer[0] = 1 << msg->spi->chip_select;  in sc18is602_txrx()
79 		hw->tlen = 1;  in sc18is602_txrx()
80 		hw->rindex = 0;  in sc18is602_txrx()
88 		memcpy(&hw->buffer[hw->tlen], t->tx_buf, len);  in sc18is602_txrx()
89 		hw->tlen += len;  in sc18is602_txrx()
93 			hw->rindex = hw->tlen - 1;  in sc18is602_txrx()
101 		hw->rindex = hw->tlen - 1;  in sc18is602_txrx()
102 		memset(&hw->buffer[hw->tlen], 0, len);  in sc18is602_txrx()
103 		hw->tlen += len;  in sc18is602_txrx()
107 	if (do_transfer && hw->tlen > 1) {  in sc18is602_txrx()
108 		ret = sc18is602_wait_ready(hw, SC18IS602_BUFSIZ);  in sc18is602_txrx()
111 		ret = i2c_master_send(hw->client, hw->buffer, hw->tlen);  in sc18is602_txrx()
114 		if (ret != hw->tlen)  in sc18is602_txrx()
118 			int rlen = hw->rindex + len;  in sc18is602_txrx()
120 			ret = sc18is602_wait_ready(hw, hw->tlen);  in sc18is602_txrx()
123 			ret = i2c_master_recv(hw->client, hw->buffer, rlen);  in sc18is602_txrx()
128 			memcpy(t->rx_buf, &hw->buffer[hw->rindex], len);  in sc18is602_txrx()
130 		hw->tlen = 0;  in sc18is602_txrx()
135 static int sc18is602_setup_transfer(struct sc18is602 *hw, u32 hz, u8 mode)  in sc18is602_setup_transfer()  argument
148 	if (hz >= hw->freq / 4) {  in sc18is602_setup_transfer()
150 		hw->speed = hw->freq / 4;  in sc18is602_setup_transfer()
151 	} else if (hz >= hw->freq / 16) {  in sc18is602_setup_transfer()
153 		hw->speed = hw->freq / 16;  in sc18is602_setup_transfer()
154 	} else if (hz >= hw->freq / 64) {  in sc18is602_setup_transfer()
156 		hw->speed = hw->freq / 64;  in sc18is602_setup_transfer()
159 		hw->speed = hw->freq / 128;  in sc18is602_setup_transfer()
167 	if (ctrl == hw->ctrl)  in sc18is602_setup_transfer()
170 	ret = i2c_smbus_write_byte_data(hw->client, 0xf0, ctrl);  in sc18is602_setup_transfer()
174 	hw->ctrl = ctrl;  in sc18is602_setup_transfer()
191 	struct sc18is602 *hw = spi_master_get_devdata(master);  in sc18is602_transfer_one()  local
196 	hw->tlen = 0;  in sc18is602_transfer_one()
200 		status = sc18is602_check_transfer(spi, t, hw->tlen);  in sc18is602_transfer_one()
204 		status = sc18is602_setup_transfer(hw, t->speed_hz, spi->mode);  in sc18is602_transfer_one()
212 			status = sc18is602_txrx(hw, m, t, do_transfer);  in sc18is602_transfer_one()
230 	struct sc18is602 *hw = spi_master_get_devdata(spi->master);  in sc18is602_setup()  local
233 	if (hw->id == sc18is602 && spi->chip_select == 2)  in sc18is602_setup()
245 	struct sc18is602 *hw;  in sc18is602_probe()  local
257 	hw = spi_master_get_devdata(master);  in sc18is602_probe()
258 	i2c_set_clientdata(client, hw);  in sc18is602_probe()
260 	hw->master = master;  in sc18is602_probe()
261 	hw->client = client;  in sc18is602_probe()
262 	hw->dev = dev;  in sc18is602_probe()
263 	hw->ctrl = 0xff;  in sc18is602_probe()
265 	hw->id = id->driver_data;  in sc18is602_probe()
267 	switch (hw->id) {  in sc18is602_probe()
271 		hw->freq = SC18IS602_CLOCK;  in sc18is602_probe()
276 			hw->freq = pdata->clock_frequency;  in sc18is602_probe()
283 				hw->freq = be32_to_cpup(val);  in sc18is602_probe()
285 		if (!hw->freq)  in sc18is602_probe()
286 			hw->freq = SC18IS602_CLOCK;  in sc18is602_probe()
295 	master->min_speed_hz = hw->freq / 128;  in sc18is602_probe()
296 	master->max_speed_hz = hw->freq / 4;  in sc18is602_probe()