72 static int i2c_clk_set(Twihs *const twihs, uint32_t speed)  in i2c_clk_set()  argument
98 	twihs->TWIHS_CWGR = TWIHS_CWGR_CLDIV(cl_div) | TWIHS_CWGR_CHDIV(cl_div)  in i2c_clk_set()
107 	Twihs *const twihs = dev_cfg->regs;  in i2c_sam_twihs_configure()  local
136 	ret = i2c_clk_set(twihs, bitrate);  in i2c_sam_twihs_configure()
142 	twihs->TWIHS_CR = TWIHS_CR_SVDIS;  in i2c_sam_twihs_configure()
145 	twihs->TWIHS_CR = TWIHS_CR_MSEN;  in i2c_sam_twihs_configure()
150 static void write_msg_start(Twihs *const twihs, struct twihs_msg *msg,  in write_msg_start()  argument
154 	twihs->TWIHS_MMR = TWIHS_MMR_DADR(daddr);  in write_msg_start()
157 	twihs->TWIHS_THR = msg->buf[msg->idx++];  in write_msg_start()
160 	twihs->TWIHS_IER = TWIHS_IER_TXRDY | TWIHS_IER_TXCOMP | TWIHS_IER_NACK;  in write_msg_start()
163 static void read_msg_start(Twihs *const twihs, struct twihs_msg *msg,  in read_msg_start()  argument
169 	twihs->TWIHS_MMR = TWIHS_MMR_MREAD | TWIHS_MMR_DADR(daddr);  in read_msg_start()
172 	twihs->TWIHS_IER = TWIHS_IER_RXRDY | TWIHS_IER_TXCOMP | TWIHS_IER_NACK;  in read_msg_start()
177 	twihs->TWIHS_CR = TWIHS_CR_START | twihs_cr_stop;  in read_msg_start()
186 	Twihs *const twihs = dev_cfg->regs;  in i2c_sam_twihs_transfer()  local
194 	(void)twihs->TWIHS_SR;  in i2c_sam_twihs_transfer()
197 	twihs->TWIHS_IADR = 0;  in i2c_sam_twihs_transfer()
206 			read_msg_start(twihs, &dev_data->msg, addr);  in i2c_sam_twihs_transfer()
208 			write_msg_start(twihs, &dev_data->msg, addr);  in i2c_sam_twihs_transfer()
226 	Twihs *const twihs = dev_cfg->regs;  in i2c_sam_twihs_isr()  local
231 	isr_status = twihs->TWIHS_SR & twihs->TWIHS_IMR;  in i2c_sam_twihs_isr()
242 		msg->buf[msg->idx++] = twihs->TWIHS_RHR;  in i2c_sam_twihs_isr()
246 			twihs->TWIHS_CR = TWIHS_CR_STOP;  in i2c_sam_twihs_isr()
255 				twihs->TWIHS_CR = TWIHS_CR_STOP;  in i2c_sam_twihs_isr()
257 				twihs->TWIHS_IDR = TWIHS_IDR_TXRDY;  in i2c_sam_twihs_isr()
263 			twihs->TWIHS_THR = msg->buf[msg->idx++];  in i2c_sam_twihs_isr()
276 	twihs->TWIHS_IDR = twihs->TWIHS_IMR;  in i2c_sam_twihs_isr()
285 	Twihs *const twihs = dev_cfg->regs;  in i2c_sam_twihs_initialize()  local
306 	twihs->TWIHS_CR = TWIHS_CR_SWRST;  in i2c_sam_twihs_initialize()