70 static inline u32 mt7621_spi_read(struct mt7621_spi *rs, u32 reg)  in mt7621_spi_read()  argument
72 	return ioread32(rs->base + reg);  in mt7621_spi_read()
75 static inline void mt7621_spi_write(struct mt7621_spi *rs, u32 reg, u32 val)  in mt7621_spi_write()  argument
77 	iowrite32(val, rs->base + reg);  in mt7621_spi_write()
82 	struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);  in mt7621_spi_set_native_cs()  local
93 	host = mt7621_spi_read(rs, MT7621_SPI_MASTER);  in mt7621_spi_set_native_cs()
96 	mt7621_spi_write(rs, MT7621_SPI_MASTER, host);  in mt7621_spi_set_native_cs()
98 	rs->pending_write = 0;  in mt7621_spi_set_native_cs()
102 	mt7621_spi_write(rs, MT7621_SPI_POLAR, polar);  in mt7621_spi_set_native_cs()
107 	struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);  in mt7621_spi_prepare()  local
113 	rate = DIV_ROUND_UP(rs->sys_freq, speed);  in mt7621_spi_prepare()
122 	reg = mt7621_spi_read(rs, MT7621_SPI_MASTER);  in mt7621_spi_prepare()
125 	rs->speed = speed;  in mt7621_spi_prepare()
138 	mt7621_spi_write(rs, MT7621_SPI_MASTER, reg);  in mt7621_spi_prepare()
143 static inline int mt7621_spi_wait_till_ready(struct mt7621_spi *rs)  in mt7621_spi_wait_till_ready()  argument
150 		status = mt7621_spi_read(rs, MT7621_SPI_TRANS);  in mt7621_spi_wait_till_ready()
163 	struct mt7621_spi *rs = spi_controller_get_devdata(host);  in mt7621_spi_prepare_message()  local
168 	mt7621_spi_wait_till_ready(rs);  in mt7621_spi_prepare_message()
177 static void mt7621_spi_read_half_duplex(struct mt7621_spi *rs,  in mt7621_spi_read_half_duplex()  argument
187 	tx_len = rs->pending_write;  in mt7621_spi_read_half_duplex()
188 	rs->pending_write = 0;  in mt7621_spi_read_half_duplex()
198 		mt7621_spi_write(rs, MT7621_SPI_MOREBUF, val);  in mt7621_spi_read_half_duplex()
202 		val = mt7621_spi_read(rs, MT7621_SPI_TRANS);  in mt7621_spi_read_half_duplex()
204 		mt7621_spi_write(rs, MT7621_SPI_TRANS, val);  in mt7621_spi_read_half_duplex()
206 		mt7621_spi_wait_till_ready(rs);  in mt7621_spi_read_half_duplex()
210 				val = mt7621_spi_read(rs, MT7621_SPI_DATA0 + i);  in mt7621_spi_read_half_duplex()
219 static inline void mt7621_spi_flush(struct mt7621_spi *rs)  in mt7621_spi_flush()  argument
221 	mt7621_spi_read_half_duplex(rs, 0, NULL);  in mt7621_spi_flush()
224 static void mt7621_spi_write_half_duplex(struct mt7621_spi *rs,  in mt7621_spi_write_half_duplex()  argument
227 	int len = rs->pending_write;  in mt7621_spi_write_half_duplex()
231 		val = mt7621_spi_read(rs, MT7621_SPI_OPCODE + (len & ~3));  in mt7621_spi_write_half_duplex()
240 			rs->pending_write = len;  in mt7621_spi_write_half_duplex()
241 			mt7621_spi_flush(rs);  in mt7621_spi_write_half_duplex()
251 			mt7621_spi_write(rs, MT7621_SPI_OPCODE + len - 4, val);  in mt7621_spi_write_half_duplex()
262 		mt7621_spi_write(rs, MT7621_SPI_OPCODE + (len & ~3), val);  in mt7621_spi_write_half_duplex()
265 	rs->pending_write = len;  in mt7621_spi_write_half_duplex()
266 	mt7621_spi_flush(rs);  in mt7621_spi_write_half_duplex()
273 	struct mt7621_spi *rs = spi_controller_get_devdata(host);  in mt7621_spi_transfer_one()  local
285 		mt7621_spi_read_half_duplex(rs, t->len, t->rx_buf);  in mt7621_spi_transfer_one()
287 		mt7621_spi_write_half_duplex(rs, t->len, t->tx_buf);  in mt7621_spi_transfer_one()
295 	struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);  in mt7621_spi_setup()  local
298 	    (spi->max_speed_hz > (rs->sys_freq / 2)))  in mt7621_spi_setup()
299 		spi->max_speed_hz = rs->sys_freq / 2;  in mt7621_spi_setup()
301 	if (spi->max_speed_hz < (rs->sys_freq / 4097)) {  in mt7621_spi_setup()
320 	struct mt7621_spi *rs;  in mt7621_spi_probe()  local
338 	host = devm_spi_alloc_host(&pdev->dev, sizeof(*rs));  in mt7621_spi_probe()
358 	rs = spi_controller_get_devdata(host);  in mt7621_spi_probe()
359 	rs->base = base;  in mt7621_spi_probe()
360 	rs->host = host;  in mt7621_spi_probe()
361 	rs->sys_freq = clk_get_rate(clk);  in mt7621_spi_probe()
362 	rs->pending_write = 0;  in mt7621_spi_probe()
363 	dev_info(&pdev->dev, "sys_freq: %u\n", rs->sys_freq);  in mt7621_spi_probe()