305 static inline int is_imx1_i2c(struct imx_i2c_struct *i2c_imx)  in is_imx1_i2c()  argument
307 	return i2c_imx->hwdata->devtype == IMX1_I2C;  in is_imx1_i2c()
310 static inline int is_vf610_i2c(struct imx_i2c_struct *i2c_imx)  in is_vf610_i2c()  argument
312 	return i2c_imx->hwdata->devtype == VF610_I2C;  in is_vf610_i2c()
316 		struct imx_i2c_struct *i2c_imx, unsigned int reg)  in imx_i2c_write_reg()  argument
318 	writeb(val, i2c_imx->base + (reg << i2c_imx->hwdata->regshift));  in imx_i2c_write_reg()
321 static inline unsigned char imx_i2c_read_reg(struct imx_i2c_struct *i2c_imx,  in imx_i2c_read_reg()  argument
324 	return readb(i2c_imx->base + (reg << i2c_imx->hwdata->regshift));  in imx_i2c_read_reg()
327 static void i2c_imx_clear_irq(struct imx_i2c_struct *i2c_imx, unsigned int bits)  in i2c_imx_clear_irq()  argument
336 	temp = ~i2c_imx->hwdata->i2sr_clr_opcode ^ bits;  in i2c_imx_clear_irq()
337 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);  in i2c_imx_clear_irq()
341 static void i2c_imx_reset_regs(struct imx_i2c_struct *i2c_imx)  in i2c_imx_reset_regs()  argument
343 	imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN,  in i2c_imx_reset_regs()
344 			  i2c_imx, IMX_I2C_I2CR);  in i2c_imx_reset_regs()
345 	i2c_imx_clear_irq(i2c_imx, I2SR_IIF | I2SR_IAL);  in i2c_imx_reset_regs()
349 static void i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx,  in i2c_imx_dma_request()  argument
354 	struct device *dev = &i2c_imx->adapter.dev;  in i2c_imx_dma_request()
370 				(IMX_I2C_I2DR << i2c_imx->hwdata->regshift);  in i2c_imx_dma_request()
389 				(IMX_I2C_I2DR << i2c_imx->hwdata->regshift);  in i2c_imx_dma_request()
399 	i2c_imx->dma = dma;  in i2c_imx_dma_request()
416 	struct imx_i2c_struct *i2c_imx = (struct imx_i2c_struct *)arg;  in i2c_imx_dma_callback()  local
417 	struct imx_i2c_dma *dma = i2c_imx->dma;  in i2c_imx_dma_callback()
424 static int i2c_imx_dma_xfer(struct imx_i2c_struct *i2c_imx,  in i2c_imx_dma_xfer()  argument
427 	struct imx_i2c_dma *dma = i2c_imx->dma;  in i2c_imx_dma_xfer()
429 	struct device *dev = &i2c_imx->adapter.dev;  in i2c_imx_dma_xfer()
449 	txdesc->callback_param = i2c_imx;  in i2c_imx_dma_xfer()
467 static void i2c_imx_dma_free(struct imx_i2c_struct *i2c_imx)  in i2c_imx_dma_free()  argument
469 	struct imx_i2c_dma *dma = i2c_imx->dma;  in i2c_imx_dma_free()
483 static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy, bool atomic)  in i2c_imx_bus_busy()  argument
489 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);  in i2c_imx_bus_busy()
493 			i2c_imx_clear_irq(i2c_imx, I2SR_IAL);  in i2c_imx_bus_busy()
498 			i2c_imx->stopped = 0;  in i2c_imx_bus_busy()
502 			i2c_imx->stopped = 1;  in i2c_imx_bus_busy()
506 			dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_bus_busy()
519 static int i2c_imx_trx_complete(struct imx_i2c_struct *i2c_imx, bool atomic)  in i2c_imx_trx_complete()  argument
522 		void __iomem *addr = i2c_imx->base + (IMX_I2C_I2SR << i2c_imx->hwdata->regshift);  in i2c_imx_trx_complete()
536 		i2c_imx->i2csr = regval;  in i2c_imx_trx_complete()
537 		i2c_imx_clear_irq(i2c_imx, I2SR_IIF | I2SR_IAL);  in i2c_imx_trx_complete()
539 		wait_event_timeout(i2c_imx->queue, i2c_imx->i2csr & I2SR_IIF, HZ / 10);  in i2c_imx_trx_complete()
542 	if (unlikely(!(i2c_imx->i2csr & I2SR_IIF))) {  in i2c_imx_trx_complete()
543 		dev_dbg(&i2c_imx->adapter.dev, "<%s> Timeout\n", __func__);  in i2c_imx_trx_complete()
548 	if (i2c_imx->i2csr & I2SR_IAL) {  in i2c_imx_trx_complete()
549 		dev_dbg(&i2c_imx->adapter.dev, "<%s> Arbitration lost\n", __func__);  in i2c_imx_trx_complete()
550 		i2c_imx_clear_irq(i2c_imx, I2SR_IAL);  in i2c_imx_trx_complete()
552 		i2c_imx->i2csr = 0;  in i2c_imx_trx_complete()
556 	dev_dbg(&i2c_imx->adapter.dev, "<%s> TRX complete\n", __func__);  in i2c_imx_trx_complete()
557 	i2c_imx->i2csr = 0;  in i2c_imx_trx_complete()
561 static int i2c_imx_acked(struct imx_i2c_struct *i2c_imx)  in i2c_imx_acked()  argument
563 	if (imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR) & I2SR_RXAK) {  in i2c_imx_acked()
564 		dev_dbg(&i2c_imx->adapter.dev, "<%s> No ACK\n", __func__);  in i2c_imx_acked()
568 	dev_dbg(&i2c_imx->adapter.dev, "<%s> ACK received\n", __func__);  in i2c_imx_acked()
572 static void i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx,  in i2c_imx_set_clk()  argument
575 	struct imx_i2c_clk_pair *i2c_clk_div = i2c_imx->hwdata->clk_div;  in i2c_imx_set_clk()
579 	if (i2c_imx->hwdata->has_err007805 && i2c_imx->bitrate > 384000) {  in i2c_imx_set_clk()
580 		dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_set_clk()
582 			i2c_imx->bitrate);  in i2c_imx_set_clk()
583 		i2c_imx->bitrate = 384000;  in i2c_imx_set_clk()
587 	if (i2c_imx->cur_clk == i2c_clk_rate)  in i2c_imx_set_clk()
590 	i2c_imx->cur_clk = i2c_clk_rate;  in i2c_imx_set_clk()
592 	div = DIV_ROUND_UP(i2c_clk_rate, i2c_imx->bitrate);  in i2c_imx_set_clk()
595 	else if (div > i2c_clk_div[i2c_imx->hwdata->ndivs - 1].div)  in i2c_imx_set_clk()
596 		i = i2c_imx->hwdata->ndivs - 1;  in i2c_imx_set_clk()
602 	i2c_imx->ifdr = i2c_clk_div[i].val;  in i2c_imx_set_clk()
610 	i2c_imx->disable_delay = DIV_ROUND_UP(500000U * i2c_clk_div[i].div,  in i2c_imx_set_clk()
614 	dev_dbg(&i2c_imx->adapter.dev, "I2C_CLK=%d, REQ DIV=%d\n",  in i2c_imx_set_clk()
616 	dev_dbg(&i2c_imx->adapter.dev, "IFDR[IC]=0x%x, REAL DIV=%d\n",  in i2c_imx_set_clk()
625 	struct imx_i2c_struct *i2c_imx = container_of(nb,  in i2c_imx_clk_notifier_call()  local
630 		i2c_imx_set_clk(i2c_imx, ndata->new_rate);  in i2c_imx_clk_notifier_call()
635 static int i2c_imx_start(struct imx_i2c_struct *i2c_imx, bool atomic)  in i2c_imx_start()  argument
640 	imx_i2c_write_reg(i2c_imx->ifdr, i2c_imx, IMX_I2C_IFDR);  in i2c_imx_start()
642 	imx_i2c_write_reg(i2c_imx->hwdata->i2sr_clr_opcode, i2c_imx, IMX_I2C_I2SR);  in i2c_imx_start()
643 	imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_start()
652 	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_start()
654 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_start()
655 	result = i2c_imx_bus_busy(i2c_imx, 1, atomic);  in i2c_imx_start()
664 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_start()
668 static void i2c_imx_stop(struct imx_i2c_struct *i2c_imx, bool atomic)  in i2c_imx_stop()  argument
672 	if (!i2c_imx->stopped) {  in i2c_imx_stop()
674 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_stop()
676 			i2c_imx->stopped = 1;  in i2c_imx_stop()
678 		if (i2c_imx->dma)  in i2c_imx_stop()
680 		imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_stop()
682 	if (is_imx1_i2c(i2c_imx)) {  in i2c_imx_stop()
687 		udelay(i2c_imx->disable_delay);  in i2c_imx_stop()
690 	if (!i2c_imx->stopped)  in i2c_imx_stop()
691 		i2c_imx_bus_busy(i2c_imx, 0, atomic);  in i2c_imx_stop()
694 	temp = i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN,  in i2c_imx_stop()
695 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_stop()
703 static void i2c_imx_enable_bus_idle(struct imx_i2c_struct *i2c_imx)  in i2c_imx_enable_bus_idle()  argument
705 	if (is_vf610_i2c(i2c_imx)) {  in i2c_imx_enable_bus_idle()
708 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_IBIC);  in i2c_imx_enable_bus_idle()
710 		imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_IBIC);  in i2c_imx_enable_bus_idle()
714 static void i2c_imx_slave_event(struct imx_i2c_struct *i2c_imx,  in i2c_imx_slave_event()  argument
717 	i2c_slave_event(i2c_imx->slave, event, val);  in i2c_imx_slave_event()
718 	i2c_imx->last_slave_event = event;  in i2c_imx_slave_event()
721 static void i2c_imx_slave_finish_op(struct imx_i2c_struct *i2c_imx)  in i2c_imx_slave_finish_op()  argument
725 	while (i2c_imx->last_slave_event != I2C_SLAVE_STOP) {  in i2c_imx_slave_finish_op()
726 		switch (i2c_imx->last_slave_event) {  in i2c_imx_slave_finish_op()
728 			i2c_imx_slave_event(i2c_imx, I2C_SLAVE_READ_PROCESSED,  in i2c_imx_slave_finish_op()
735 			i2c_imx_slave_event(i2c_imx, I2C_SLAVE_STOP, &val);  in i2c_imx_slave_finish_op()
745 static irqreturn_t i2c_imx_slave_handle(struct imx_i2c_struct *i2c_imx,  in i2c_imx_slave_handle()  argument
751 		i2c_imx_clear_irq(i2c_imx, I2SR_IAL);  in i2c_imx_slave_handle()
758 		i2c_imx_slave_finish_op(i2c_imx);  in i2c_imx_slave_handle()
767 		i2c_imx_slave_finish_op(i2c_imx);  in i2c_imx_slave_handle()
769 			dev_dbg(&i2c_imx->adapter.dev, "read requested");  in i2c_imx_slave_handle()
770 			i2c_imx_slave_event(i2c_imx,  in i2c_imx_slave_handle()
775 			imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_slave_handle()
778 			imx_i2c_write_reg(value, i2c_imx, IMX_I2C_I2DR);  in i2c_imx_slave_handle()
780 			dev_dbg(&i2c_imx->adapter.dev, "write requested");  in i2c_imx_slave_handle()
781 			i2c_imx_slave_event(i2c_imx,  in i2c_imx_slave_handle()
786 			imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_slave_handle()
788 			imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);  in i2c_imx_slave_handle()
791 		value = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);  in i2c_imx_slave_handle()
792 		i2c_imx_slave_event(i2c_imx,  in i2c_imx_slave_handle()
796 		imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_slave_handle()
798 		i2c_imx_slave_event(i2c_imx,  in i2c_imx_slave_handle()
801 		imx_i2c_write_reg(value, i2c_imx, IMX_I2C_I2DR);  in i2c_imx_slave_handle()
804 		imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_slave_handle()
805 		imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);  in i2c_imx_slave_handle()
806 		i2c_imx_slave_finish_op(i2c_imx);  in i2c_imx_slave_handle()
818 	hrtimer_try_to_cancel(&i2c_imx->slave_timer);  in i2c_imx_slave_handle()
819 	hrtimer_forward_now(&i2c_imx->slave_timer, I2C_IMX_CHECK_DELAY);  in i2c_imx_slave_handle()
820 	hrtimer_restart(&i2c_imx->slave_timer);  in i2c_imx_slave_handle()
826 	struct imx_i2c_struct *i2c_imx = container_of(t, struct imx_i2c_struct,  in i2c_imx_slave_timeout()  local
831 	spin_lock_irqsave(&i2c_imx->slave_lock, flags);  in i2c_imx_slave_timeout()
832 	status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);  in i2c_imx_slave_timeout()
833 	ctl = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_slave_timeout()
834 	i2c_imx_slave_handle(i2c_imx, status, ctl);  in i2c_imx_slave_timeout()
835 	spin_unlock_irqrestore(&i2c_imx->slave_lock, flags);  in i2c_imx_slave_timeout()
839 static void i2c_imx_slave_init(struct imx_i2c_struct *i2c_imx)  in i2c_imx_slave_init()  argument
844 	imx_i2c_write_reg((i2c_imx->slave->addr << 1), i2c_imx, IMX_I2C_IADR);  in i2c_imx_slave_init()
846 	i2c_imx_reset_regs(i2c_imx);  in i2c_imx_slave_init()
849 	temp = i2c_imx->hwdata->i2cr_ien_opcode;  in i2c_imx_slave_init()
850 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_slave_init()
854 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_slave_init()
856 	i2c_imx_enable_bus_idle(i2c_imx);  in i2c_imx_slave_init()
861 	struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter);  in i2c_imx_reg_slave()  local
864 	if (i2c_imx->slave)  in i2c_imx_reg_slave()
867 	i2c_imx->slave = client;  in i2c_imx_reg_slave()
868 	i2c_imx->last_slave_event = I2C_SLAVE_STOP;  in i2c_imx_reg_slave()
871 	ret = pm_runtime_resume_and_get(i2c_imx->adapter.dev.parent);  in i2c_imx_reg_slave()
873 		dev_err(&i2c_imx->adapter.dev, "failed to resume i2c controller");  in i2c_imx_reg_slave()
877 	i2c_imx_slave_init(i2c_imx);  in i2c_imx_reg_slave()
884 	struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter);  in i2c_imx_unreg_slave()  local
887 	if (!i2c_imx->slave)  in i2c_imx_unreg_slave()
891 	imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IADR);  in i2c_imx_unreg_slave()
893 	i2c_imx_reset_regs(i2c_imx);  in i2c_imx_unreg_slave()
895 	i2c_imx->slave = NULL;  in i2c_imx_unreg_slave()
898 	ret = pm_runtime_put_sync(i2c_imx->adapter.dev.parent);  in i2c_imx_unreg_slave()
900 		dev_err(&i2c_imx->adapter.dev, "failed to suspend i2c controller");  in i2c_imx_unreg_slave()
905 static irqreturn_t i2c_imx_master_isr(struct imx_i2c_struct *i2c_imx, unsigned int status)  in i2c_imx_master_isr()  argument
908 	i2c_imx->i2csr = status;  in i2c_imx_master_isr()
909 	wake_up(&i2c_imx->queue);  in i2c_imx_master_isr()
916 	struct imx_i2c_struct *i2c_imx = dev_id;  in i2c_imx_isr()  local
920 	spin_lock_irqsave(&i2c_imx->slave_lock, flags);  in i2c_imx_isr()
921 	status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);  in i2c_imx_isr()
922 	ctl = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_isr()
925 		i2c_imx_clear_irq(i2c_imx, I2SR_IIF);  in i2c_imx_isr()
926 		if (i2c_imx->slave) {  in i2c_imx_isr()
930 				ret = i2c_imx_slave_handle(i2c_imx,  in i2c_imx_isr()
932 				spin_unlock_irqrestore(&i2c_imx->slave_lock,  in i2c_imx_isr()
936 			i2c_imx_slave_finish_op(i2c_imx);  in i2c_imx_isr()
938 		spin_unlock_irqrestore(&i2c_imx->slave_lock, flags);  in i2c_imx_isr()
939 		return i2c_imx_master_isr(i2c_imx, status);  in i2c_imx_isr()
941 	spin_unlock_irqrestore(&i2c_imx->slave_lock, flags);  in i2c_imx_isr()
946 static int i2c_imx_dma_write(struct imx_i2c_struct *i2c_imx,  in i2c_imx_dma_write()  argument
953 	struct imx_i2c_dma *dma = i2c_imx->dma;  in i2c_imx_dma_write()
954 	struct device *dev = &i2c_imx->adapter.dev;  in i2c_imx_dma_write()
960 	result = i2c_imx_dma_xfer(i2c_imx, msgs);  in i2c_imx_dma_write()
964 	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_write()
966 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_write()
972 	imx_i2c_write_reg(i2c_8bit_addr_from_msg(msgs), i2c_imx, IMX_I2C_I2DR);  in i2c_imx_dma_write()
974 				&i2c_imx->dma->cmd_complete,  in i2c_imx_dma_write()
983 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);  in i2c_imx_dma_write()
994 	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_write()
996 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_write()
1000 				i2c_imx, IMX_I2C_I2DR);  in i2c_imx_dma_write()
1001 	result = i2c_imx_trx_complete(i2c_imx, false);  in i2c_imx_dma_write()
1005 	return i2c_imx_acked(i2c_imx);  in i2c_imx_dma_write()
1008 static int i2c_imx_dma_read(struct imx_i2c_struct *i2c_imx,  in i2c_imx_dma_read()  argument
1015 	struct imx_i2c_dma *dma = i2c_imx->dma;  in i2c_imx_dma_read()
1016 	struct device *dev = &i2c_imx->adapter.dev;  in i2c_imx_dma_read()
1024 	result = i2c_imx_dma_xfer(i2c_imx, msgs);  in i2c_imx_dma_read()
1029 				&i2c_imx->dma->cmd_complete,  in i2c_imx_dma_read()
1038 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);  in i2c_imx_dma_read()
1049 	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1051 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1054 	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1056 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1058 	msgs->buf[msgs->len-2] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);  in i2c_imx_dma_read()
1060 	result = i2c_imx_trx_complete(i2c_imx, false);  in i2c_imx_dma_read()
1070 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1072 			i2c_imx->stopped = 1;  in i2c_imx_dma_read()
1074 		imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1075 		if (!i2c_imx->stopped)  in i2c_imx_dma_read()
1076 			i2c_imx_bus_busy(i2c_imx, 0, false);  in i2c_imx_dma_read()
1085 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1087 		imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_dma_read()
1089 	msgs->buf[msgs->len-1] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);  in i2c_imx_dma_read()
1094 static int i2c_imx_write(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs,  in i2c_imx_write()  argument
1099 	dev_dbg(&i2c_imx->adapter.dev, "<%s> write slave address: addr=0x%x\n",  in i2c_imx_write()
1103 	imx_i2c_write_reg(i2c_8bit_addr_from_msg(msgs), i2c_imx, IMX_I2C_I2DR);  in i2c_imx_write()
1104 	result = i2c_imx_trx_complete(i2c_imx, atomic);  in i2c_imx_write()
1107 	result = i2c_imx_acked(i2c_imx);  in i2c_imx_write()
1110 	dev_dbg(&i2c_imx->adapter.dev, "<%s> write data\n", __func__);  in i2c_imx_write()
1114 		dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_write()
1117 		imx_i2c_write_reg(msgs->buf[i], i2c_imx, IMX_I2C_I2DR);  in i2c_imx_write()
1118 		result = i2c_imx_trx_complete(i2c_imx, atomic);  in i2c_imx_write()
1121 		result = i2c_imx_acked(i2c_imx);  in i2c_imx_write()
1128 static int i2c_imx_read(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs,  in i2c_imx_read()  argument
1134 	int use_dma = i2c_imx->dma && msgs->flags & I2C_M_DMA_SAFE &&  in i2c_imx_read()
1137 	dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_read()
1142 	imx_i2c_write_reg(i2c_8bit_addr_from_msg(msgs), i2c_imx, IMX_I2C_I2DR);  in i2c_imx_read()
1143 	result = i2c_imx_trx_complete(i2c_imx, atomic);  in i2c_imx_read()
1146 	result = i2c_imx_acked(i2c_imx);  in i2c_imx_read()
1150 	dev_dbg(&i2c_imx->adapter.dev, "<%s> setup bus\n", __func__);  in i2c_imx_read()
1153 	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1164 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1165 	imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); /* dummy read */  in i2c_imx_read()
1167 	dev_dbg(&i2c_imx->adapter.dev, "<%s> read data\n", __func__);  in i2c_imx_read()
1170 		return i2c_imx_dma_read(i2c_imx, msgs, is_lastmsg);  in i2c_imx_read()
1176 		result = i2c_imx_trx_complete(i2c_imx, atomic);  in i2c_imx_read()
1185 			len = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);  in i2c_imx_read()
1188 			dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_read()
1199 				dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_read()
1201 				temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1203 					i2c_imx->stopped =  1;  in i2c_imx_read()
1205 				imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1206 				if (!i2c_imx->stopped)  in i2c_imx_read()
1207 					i2c_imx_bus_busy(i2c_imx, 0, atomic);  in i2c_imx_read()
1216 				temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1218 				imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1221 			dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_read()
1223 			temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1225 			imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_read()
1230 			msgs->buf[i] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);  in i2c_imx_read()
1231 		dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_read()
1244 	struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(adapter);  in i2c_imx_xfer_common()  local
1247 	result = i2c_imx_start(i2c_imx, atomic);  in i2c_imx_xfer_common()
1253 		if (!atomic && i2c_imx->adapter.bus_recovery_info) {  in i2c_imx_xfer_common()
1254 			i2c_recover_bus(&i2c_imx->adapter);  in i2c_imx_xfer_common()
1255 			result = i2c_imx_start(i2c_imx, atomic);  in i2c_imx_xfer_common()
1268 			dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_xfer_common()
1270 			temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_xfer_common()
1272 			imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_xfer_common()
1273 			result = i2c_imx_bus_busy(i2c_imx, 1, atomic);  in i2c_imx_xfer_common()
1277 		dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_xfer_common()
1281 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);  in i2c_imx_xfer_common()
1282 		dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_xfer_common()
1288 		temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);  in i2c_imx_xfer_common()
1289 		dev_dbg(&i2c_imx->adapter.dev,  in i2c_imx_xfer_common()
1298 			result = i2c_imx_read(i2c_imx, &msgs[i], is_lastmsg, atomic);  in i2c_imx_xfer_common()
1301 			    i2c_imx->dma && msgs[i].len >= DMA_THRESHOLD &&  in i2c_imx_xfer_common()
1303 				result = i2c_imx_dma_write(i2c_imx, &msgs[i]);  in i2c_imx_xfer_common()
1305 				result = i2c_imx_write(i2c_imx, &msgs[i], atomic);  in i2c_imx_xfer_common()
1313 	i2c_imx_stop(i2c_imx, atomic);  in i2c_imx_xfer_common()
1315 	dev_dbg(&i2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__,  in i2c_imx_xfer_common()
1319 	if (i2c_imx->slave)  in i2c_imx_xfer_common()
1320 		i2c_imx_slave_init(i2c_imx);  in i2c_imx_xfer_common()
1328 	struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(adapter);  in i2c_imx_xfer()  local
1331 	result = pm_runtime_resume_and_get(i2c_imx->adapter.dev.parent);  in i2c_imx_xfer()
1337 	pm_runtime_mark_last_busy(i2c_imx->adapter.dev.parent);  in i2c_imx_xfer()
1338 	pm_runtime_put_autosuspend(i2c_imx->adapter.dev.parent);  in i2c_imx_xfer()
1346 	struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(adapter);  in i2c_imx_xfer_atomic()  local
1349 	result = clk_enable(i2c_imx->clk);  in i2c_imx_xfer_atomic()
1355 	clk_disable(i2c_imx->clk);  in i2c_imx_xfer_atomic()
1362 	struct imx_i2c_struct *i2c_imx;  in i2c_imx_prepare_recovery()  local
1364 	i2c_imx = container_of(adap, struct imx_i2c_struct, adapter);  in i2c_imx_prepare_recovery()
1366 	pinctrl_select_state(i2c_imx->pinctrl, i2c_imx->pinctrl_pins_gpio);  in i2c_imx_prepare_recovery()
1371 	struct imx_i2c_struct *i2c_imx;  in i2c_imx_unprepare_recovery()  local
1373 	i2c_imx = container_of(adap, struct imx_i2c_struct, adapter);  in i2c_imx_unprepare_recovery()
1375 	pinctrl_select_state(i2c_imx->pinctrl, i2c_imx->pinctrl_pins_default);  in i2c_imx_unprepare_recovery()
1385 static int i2c_imx_init_recovery_info(struct imx_i2c_struct *i2c_imx,  in i2c_imx_init_recovery_info()  argument
1388 	struct i2c_bus_recovery_info *rinfo = &i2c_imx->rinfo;  in i2c_imx_init_recovery_info()
1390 	i2c_imx->pinctrl = devm_pinctrl_get(&pdev->dev);  in i2c_imx_init_recovery_info()
1391 	if (!i2c_imx->pinctrl) {  in i2c_imx_init_recovery_info()
1395 	if (IS_ERR(i2c_imx->pinctrl)) {  in i2c_imx_init_recovery_info()
1397 		return PTR_ERR(i2c_imx->pinctrl);  in i2c_imx_init_recovery_info()
1400 	i2c_imx->pinctrl_pins_default = pinctrl_lookup_state(i2c_imx->pinctrl,  in i2c_imx_init_recovery_info()
1402 	i2c_imx->pinctrl_pins_gpio = pinctrl_lookup_state(i2c_imx->pinctrl,  in i2c_imx_init_recovery_info()
1412 		   IS_ERR(i2c_imx->pinctrl_pins_default) ||  in i2c_imx_init_recovery_info()
1413 		   IS_ERR(i2c_imx->pinctrl_pins_gpio)) {  in i2c_imx_init_recovery_info()
1424 	i2c_imx->adapter.bus_recovery_info = rinfo;  in i2c_imx_init_recovery_info()
1445 	struct imx_i2c_struct *i2c_imx;  in i2c_imx_probe()  local
1462 	i2c_imx = devm_kzalloc(&pdev->dev, sizeof(*i2c_imx), GFP_KERNEL);  in i2c_imx_probe()
1463 	if (!i2c_imx)  in i2c_imx_probe()
1466 	spin_lock_init(&i2c_imx->slave_lock);  in i2c_imx_probe()
1467 	hrtimer_init(&i2c_imx->slave_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);  in i2c_imx_probe()
1468 	i2c_imx->slave_timer.function = i2c_imx_slave_timeout;  in i2c_imx_probe()
1472 		i2c_imx->hwdata = match;  in i2c_imx_probe()
1474 		i2c_imx->hwdata = (struct imx_i2c_hwdata *)  in i2c_imx_probe()
1478 	strscpy(i2c_imx->adapter.name, pdev->name, sizeof(i2c_imx->adapter.name));  in i2c_imx_probe()
1479 	i2c_imx->adapter.owner		= THIS_MODULE;  in i2c_imx_probe()
1480 	i2c_imx->adapter.algo		= &i2c_imx_algo;  in i2c_imx_probe()
1481 	i2c_imx->adapter.dev.parent	= &pdev->dev;  in i2c_imx_probe()
1482 	i2c_imx->adapter.nr		= pdev->id;  in i2c_imx_probe()
1483 	i2c_imx->adapter.dev.of_node	= pdev->dev.of_node;  in i2c_imx_probe()
1484 	i2c_imx->base			= base;  in i2c_imx_probe()
1485 	ACPI_COMPANION_SET(&i2c_imx->adapter.dev, ACPI_COMPANION(&pdev->dev));  in i2c_imx_probe()
1488 	i2c_imx->clk = devm_clk_get_enabled(&pdev->dev, NULL);  in i2c_imx_probe()
1489 	if (IS_ERR(i2c_imx->clk))  in i2c_imx_probe()
1490 		return dev_err_probe(&pdev->dev, PTR_ERR(i2c_imx->clk),  in i2c_imx_probe()
1494 	init_waitqueue_head(&i2c_imx->queue);  in i2c_imx_probe()
1497 	i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);  in i2c_imx_probe()
1500 	platform_set_drvdata(pdev, i2c_imx);  in i2c_imx_probe()
1512 	ret = request_irq(irq, i2c_imx_isr, IRQF_SHARED, pdev->name, i2c_imx);  in i2c_imx_probe()
1519 	i2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ;  in i2c_imx_probe()
1521 				   "clock-frequency", &i2c_imx->bitrate);  in i2c_imx_probe()
1523 		i2c_imx->bitrate = pdata->bitrate;  in i2c_imx_probe()
1524 	i2c_imx->clk_change_nb.notifier_call = i2c_imx_clk_notifier_call;  in i2c_imx_probe()
1525 	clk_notifier_register(i2c_imx->clk, &i2c_imx->clk_change_nb);  in i2c_imx_probe()
1526 	i2c_imx_set_clk(i2c_imx, clk_get_rate(i2c_imx->clk));  in i2c_imx_probe()
1528 	i2c_imx_reset_regs(i2c_imx);  in i2c_imx_probe()
1531 	ret = i2c_imx_init_recovery_info(i2c_imx, pdev);  in i2c_imx_probe()
1537 	ret = i2c_add_numbered_adapter(&i2c_imx->adapter);  in i2c_imx_probe()
1544 	dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq);  in i2c_imx_probe()
1545 	dev_dbg(&i2c_imx->adapter.dev, "device resources: %pR\n", res);  in i2c_imx_probe()
1546 	dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n",  in i2c_imx_probe()
1547 		i2c_imx->adapter.name);  in i2c_imx_probe()
1548 	dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n");  in i2c_imx_probe()
1551 	i2c_imx_dma_request(i2c_imx, phy_addr);  in i2c_imx_probe()
1556 	clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb);  in i2c_imx_probe()
1557 	free_irq(irq, i2c_imx);  in i2c_imx_probe()
1568 	struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);  in i2c_imx_remove()  local
1573 	hrtimer_cancel(&i2c_imx->slave_timer);  in i2c_imx_remove()
1576 	dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");  in i2c_imx_remove()
1577 	i2c_del_adapter(&i2c_imx->adapter);  in i2c_imx_remove()
1579 	if (i2c_imx->dma)  in i2c_imx_remove()
1580 		i2c_imx_dma_free(i2c_imx);  in i2c_imx_remove()
1584 		imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IADR);  in i2c_imx_remove()
1585 		imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IFDR);  in i2c_imx_remove()
1586 		imx_i2c_write_reg(0, i2c_imx, IMX_I2C_I2CR);  in i2c_imx_remove()
1587 		imx_i2c_write_reg(0, i2c_imx, IMX_I2C_I2SR);  in i2c_imx_remove()
1590 	clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb);  in i2c_imx_remove()
1593 		free_irq(irq, i2c_imx);  in i2c_imx_remove()
1601 	struct imx_i2c_struct *i2c_imx = dev_get_drvdata(dev);  in i2c_imx_runtime_suspend()  local
1603 	clk_disable(i2c_imx->clk);  in i2c_imx_runtime_suspend()
1610 	struct imx_i2c_struct *i2c_imx = dev_get_drvdata(dev);  in i2c_imx_runtime_resume()  local
1613 	ret = clk_enable(i2c_imx->clk);  in i2c_imx_runtime_resume()