25 static int at91_wait_for_xfer(struct at91_i2c_bus *bus, u32 status)  in at91_wait_for_xfer()  argument
27 	struct at91_i2c_regs *reg = bus->regs;  in at91_wait_for_xfer()
31 	bus->status = 0;  in at91_wait_for_xfer()
35 		bus->status |= sr;  in at91_wait_for_xfer()
46 static int at91_i2c_xfer_msg(struct at91_i2c_bus *bus, struct i2c_msg *msg)  in at91_i2c_xfer_msg()  argument
48 	struct at91_i2c_regs *reg = bus->regs;  in at91_i2c_xfer_msg()
58 			ret = at91_wait_for_xfer(bus, TWI_SR_RXRDY);  in at91_i2c_xfer_msg()
67 		ret = at91_wait_for_xfer(bus, TWI_SR_RXRDY);  in at91_i2c_xfer_msg()
77 			ret = at91_wait_for_xfer(bus, TWI_SR_TXRDY);  in at91_i2c_xfer_msg()
87 		ret = at91_wait_for_xfer(bus, TWI_SR_TXCOMP);  in at91_i2c_xfer_msg()
92 	if (bus->status & (TWI_SR_OVRE | TWI_SR_UNRE | TWI_SR_LOCK)) {  in at91_i2c_xfer_msg()
100 	if (bus->status & TWI_SR_LOCK)  in at91_i2c_xfer_msg()
108 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_i2c_xfer()  local
109 	struct at91_i2c_regs *reg = bus->regs;  in at91_i2c_xfer()
141 	ret = at91_i2c_xfer_msg(bus, m_start);  in at91_i2c_xfer()
152 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_calc_i2c_clock()  local
153 	const struct at91_i2c_pdata *pdata = bus->pdata;  in at91_calc_i2c_clock()
159 	src_rate = bus->bus_clk_rate;  in at91_calc_i2c_clock()
170 	bus->speed = DIV_ROUND_UP(src_rate,  in at91_calc_i2c_clock()
173 	bus->cwgr_val = (ckdiv << 16) | (cdiv << 8) | cdiv;  in at91_calc_i2c_clock()
178 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_i2c_enable_clk()  local
195 	bus->bus_clk_rate = clk_rate;  in at91_i2c_enable_clk()
204 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_i2c_probe_chip()  local
205 	struct at91_i2c_regs *reg = bus->regs;  in at91_i2c_probe_chip()
214 	at91_calc_i2c_clock(dev, bus->clock_frequency);  in at91_i2c_probe_chip()
216 	writel(bus->cwgr_val, &reg->cwgr);  in at91_i2c_probe_chip()
225 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_i2c_set_bus_speed()  local
229 	writel(bus->cwgr_val, &bus->regs->cwgr);  in at91_i2c_set_bus_speed()
236 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_i2c_get_bus_speed()  local
238 	return bus->speed;  in at91_i2c_get_bus_speed()
244 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_i2c_ofdata_to_platdata()  local
247 	bus->regs = (struct at91_i2c_regs *)devfdt_get_addr(dev);  in at91_i2c_ofdata_to_platdata()
248 	bus->pdata = (struct at91_i2c_pdata *)dev_get_driver_data(dev);  in at91_i2c_ofdata_to_platdata()
249 	bus->clock_frequency = fdtdec_get_int(blob, node,  in at91_i2c_ofdata_to_platdata()
264 	struct at91_i2c_bus *bus = dev_get_priv(dev);  in at91_i2c_probe()  local
265 	struct at91_i2c_regs *reg = bus->regs;  in at91_i2c_probe()
274 	at91_calc_i2c_clock(dev, bus->clock_frequency);  in at91_i2c_probe()
276 	writel(bus->cwgr_val, &reg->cwgr);  in at91_i2c_probe()