73 static int i2c_clk_set(Twi *const twi, uint32_t speed)  in i2c_clk_set()  argument
99 	twi->TWI_CWGR = TWI_CWGR_CLDIV(cl_div) | TWI_CWGR_CHDIV(cl_div)  in i2c_clk_set()
109 	Twi *const twi = dev_cfg->regs;  in i2c_sam_twi_configure()  local
140 	ret = i2c_clk_set(twi, bitrate);  in i2c_sam_twi_configure()
146 	twi->TWI_CR = TWI_CR_SVDIS;  in i2c_sam_twi_configure()
149 	twi->TWI_CR = TWI_CR_MSEN;  in i2c_sam_twi_configure()
158 static void write_msg_start(Twi *const twi, struct twi_msg *msg, uint8_t daddr)  in write_msg_start()  argument
161 	twi->TWI_MMR = TWI_MMR_DADR(daddr);  in write_msg_start()
164 	twi->TWI_THR = msg->buf[msg->idx++];  in write_msg_start()
167 	twi->TWI_IER = TWI_IER_TXRDY | TWI_IER_TXCOMP | TWI_IER_NACK;  in write_msg_start()
170 static void read_msg_start(Twi *const twi, struct twi_msg *msg, uint8_t daddr)  in read_msg_start()  argument
175 	twi->TWI_MMR = TWI_MMR_MREAD | TWI_MMR_DADR(daddr);  in read_msg_start()
180 	twi->TWI_CR = TWI_CR_START | twi_cr_stop;  in read_msg_start()
183 	twi->TWI_IER = TWI_IER_RXRDY | TWI_IER_TXCOMP | TWI_IER_NACK;  in read_msg_start()
192 	Twi *const twi = dev_cfg->regs;  in i2c_sam_twi_transfer()  local
202 	(void)twi->TWI_SR;  in i2c_sam_twi_transfer()
205 	twi->TWI_IADR = 0;  in i2c_sam_twi_transfer()
229 			read_msg_start(twi, &dev_data->msg, addr);  in i2c_sam_twi_transfer()
231 			write_msg_start(twi, &dev_data->msg, addr);  in i2c_sam_twi_transfer()
254 	Twi *const twi = dev_cfg->regs;  in i2c_sam_twi_isr()  local
259 	isr_status = twi->TWI_SR & twi->TWI_IMR;  in i2c_sam_twi_isr()
270 		msg->buf[msg->idx++] = twi->TWI_RHR;  in i2c_sam_twi_isr()
274 			twi->TWI_CR = TWI_CR_STOP;  in i2c_sam_twi_isr()
283 				twi->TWI_CR = TWI_CR_STOP;  in i2c_sam_twi_isr()
285 				twi->TWI_IDR = TWI_IDR_TXRDY;  in i2c_sam_twi_isr()
291 			twi->TWI_THR = msg->buf[msg->idx++];  in i2c_sam_twi_isr()
304 	twi->TWI_IDR = twi->TWI_IMR;  in i2c_sam_twi_isr()
313 	Twi *const twi = dev_cfg->regs;  in i2c_sam_twi_initialize()  local
335 	twi->TWI_CR = TWI_CR_SWRST;  in i2c_sam_twi_initialize()