Lines Matching +full:autosuspend +full:- +full:period
1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2002 Motorola GSG-China
29 #include <linux/dma-mapping.h>
47 #include <linux/platform_data/i2c-imx.h>
54 #define DRIVER_NAME "imx-i2c"
109 * - write zero to clear(w0c) INT flag on i.MX,
110 * - but write one to clear(w1c) INT flag on Vybrid.
112 * - set I2CR_IEN bit enable the module on i.MX,
113 * - but clear I2CR_IEN bit enable the module on Vybrid.
124 * taken from table 26-5, p.26-9, Freescale i.MX
211 * the SCL low period violates the I2C spec of 1.3 uS min.
320 .name = "imx1-i2c",
323 .name = "imx21-i2c",
332 { .compatible = "fsl,imx1-i2c", .data = &imx1_i2c_hwdata, },
333 { .compatible = "fsl,imx21-i2c", .data = &imx21_i2c_hwdata, },
334 { .compatible = "fsl,imx6q-i2c", .data = &imx6_i2c_hwdata, },
335 { .compatible = "fsl,imx6sl-i2c", .data = &imx6_i2c_hwdata, },
336 { .compatible = "fsl,imx6sll-i2c", .data = &imx6_i2c_hwdata, },
337 { .compatible = "fsl,imx6sx-i2c", .data = &imx6_i2c_hwdata, },
338 { .compatible = "fsl,imx6ul-i2c", .data = &imx6_i2c_hwdata, },
339 { .compatible = "fsl,imx7d-i2c", .data = &imx6_i2c_hwdata, },
340 { .compatible = "fsl,imx7s-i2c", .data = &imx6_i2c_hwdata, },
341 { .compatible = "fsl,imx8mm-i2c", .data = &imx6_i2c_hwdata, },
342 { .compatible = "fsl,imx8mn-i2c", .data = &imx6_i2c_hwdata, },
343 { .compatible = "fsl,imx8mp-i2c", .data = &imx6_i2c_hwdata, },
344 { .compatible = "fsl,imx8mq-i2c", .data = &imx6_i2c_hwdata, },
345 { .compatible = "fsl,vf610-i2c", .data = &vf610_i2c_hwdata, },
346 { .compatible = "nxp,s32g2-i2c", .data = &s32g2_i2c_hwdata, },
359 return i2c_imx->hwdata->devtype == IMX1_I2C; in is_imx1_i2c()
364 return i2c_imx->hwdata->devtype == VF610_I2C; in is_vf610_i2c()
370 writeb(val, i2c_imx->base + (reg << i2c_imx->hwdata->regshift)); in imx_i2c_write_reg()
376 return readb(i2c_imx->base + (reg << i2c_imx->hwdata->regshift)); in imx_i2c_read_reg()
388 temp = ~i2c_imx->hwdata->i2sr_clr_opcode ^ bits; in i2c_imx_clear_irq()
395 imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN, in i2c_imx_reset_regs()
405 struct device *dev = i2c_imx->adapter.dev.parent; in i2c_imx_dma_request()
410 return -ENOMEM; in i2c_imx_dma_request()
412 dma->chan_tx = dma_request_chan(dev, "tx"); in i2c_imx_dma_request()
413 if (IS_ERR(dma->chan_tx)) { in i2c_imx_dma_request()
414 ret = PTR_ERR(dma->chan_tx); in i2c_imx_dma_request()
415 if (ret != -ENODEV && ret != -EPROBE_DEFER) in i2c_imx_dma_request()
421 (IMX_I2C_I2DR << i2c_imx->hwdata->regshift); in i2c_imx_dma_request()
425 ret = dmaengine_slave_config(dma->chan_tx, &dma_sconfig); in i2c_imx_dma_request()
431 dma->chan_rx = dma_request_chan(dev, "rx"); in i2c_imx_dma_request()
432 if (IS_ERR(dma->chan_rx)) { in i2c_imx_dma_request()
433 ret = PTR_ERR(dma->chan_rx); in i2c_imx_dma_request()
434 if (ret != -ENODEV && ret != -EPROBE_DEFER) in i2c_imx_dma_request()
440 (IMX_I2C_I2DR << i2c_imx->hwdata->regshift); in i2c_imx_dma_request()
444 ret = dmaengine_slave_config(dma->chan_rx, &dma_sconfig); in i2c_imx_dma_request()
450 i2c_imx->dma = dma; in i2c_imx_dma_request()
451 init_completion(&dma->cmd_complete); in i2c_imx_dma_request()
453 dma_chan_name(dma->chan_tx), dma_chan_name(dma->chan_rx)); in i2c_imx_dma_request()
458 dma_release_channel(dma->chan_rx); in i2c_imx_dma_request()
460 dma_release_channel(dma->chan_tx); in i2c_imx_dma_request()
470 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_callback()
472 dma_unmap_single(dma->chan_using->device->dev, dma->dma_buf, in i2c_imx_dma_callback()
473 dma->dma_len, dma->dma_data_dir); in i2c_imx_dma_callback()
474 complete(&dma->cmd_complete); in i2c_imx_dma_callback()
480 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_xfer()
482 struct device *dev = &i2c_imx->adapter.dev; in i2c_imx_dma_xfer()
483 struct device *chan_dev = dma->chan_using->device->dev; in i2c_imx_dma_xfer()
485 dma->dma_buf = dma_map_single(chan_dev, msgs->buf, in i2c_imx_dma_xfer()
486 dma->dma_len, dma->dma_data_dir); in i2c_imx_dma_xfer()
487 if (dma_mapping_error(chan_dev, dma->dma_buf)) { in i2c_imx_dma_xfer()
492 txdesc = dmaengine_prep_slave_single(dma->chan_using, dma->dma_buf, in i2c_imx_dma_xfer()
493 dma->dma_len, dma->dma_transfer_dir, in i2c_imx_dma_xfer()
500 reinit_completion(&dma->cmd_complete); in i2c_imx_dma_xfer()
501 txdesc->callback = i2c_imx_dma_callback; in i2c_imx_dma_xfer()
502 txdesc->callback_param = i2c_imx; in i2c_imx_dma_xfer()
508 dma_async_issue_pending(dma->chan_using); in i2c_imx_dma_xfer()
512 dmaengine_terminate_sync(dma->chan_using); in i2c_imx_dma_xfer()
514 dma_unmap_single(chan_dev, dma->dma_buf, in i2c_imx_dma_xfer()
515 dma->dma_len, dma->dma_data_dir); in i2c_imx_dma_xfer()
517 return -EINVAL; in i2c_imx_dma_xfer()
522 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_free()
524 dma->dma_buf = 0; in i2c_imx_dma_free()
525 dma->dma_len = 0; in i2c_imx_dma_free()
527 dma_release_channel(dma->chan_tx); in i2c_imx_dma_free()
528 dma->chan_tx = NULL; in i2c_imx_dma_free()
530 dma_release_channel(dma->chan_rx); in i2c_imx_dma_free()
531 dma->chan_rx = NULL; in i2c_imx_dma_free()
533 dma->chan_using = NULL; in i2c_imx_dma_free()
538 bool multi_master = i2c_imx->multi_master; in i2c_imx_bus_busy()
548 return -EAGAIN; in i2c_imx_bus_busy()
552 i2c_imx->stopped = 0; in i2c_imx_bus_busy()
556 i2c_imx->stopped = 1; in i2c_imx_bus_busy()
560 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_bus_busy()
562 return -ETIMEDOUT; in i2c_imx_bus_busy()
576 void __iomem *addr = i2c_imx->base + (IMX_I2C_I2SR << i2c_imx->hwdata->regshift); in i2c_imx_trx_complete()
583 * Set the value hard as it is done for the non-atomic use-case. in i2c_imx_trx_complete()
590 i2c_imx->i2csr = regval; in i2c_imx_trx_complete()
593 wait_event_timeout(i2c_imx->queue, i2c_imx->i2csr & I2SR_IIF, HZ / 10); in i2c_imx_trx_complete()
596 if (unlikely(!(i2c_imx->i2csr & I2SR_IIF))) { in i2c_imx_trx_complete()
597 dev_dbg(&i2c_imx->adapter.dev, "<%s> Timeout\n", __func__); in i2c_imx_trx_complete()
598 return -ETIMEDOUT; in i2c_imx_trx_complete()
601 /* In multi-master mode check for arbitration lost */ in i2c_imx_trx_complete()
602 if (i2c_imx->multi_master && (i2c_imx->i2csr & I2SR_IAL)) { in i2c_imx_trx_complete()
603 dev_dbg(&i2c_imx->adapter.dev, "<%s> Arbitration lost\n", __func__); in i2c_imx_trx_complete()
606 i2c_imx->i2csr = 0; in i2c_imx_trx_complete()
607 return -EAGAIN; in i2c_imx_trx_complete()
610 dev_dbg(&i2c_imx->adapter.dev, "<%s> TRX complete\n", __func__); in i2c_imx_trx_complete()
611 i2c_imx->i2csr = 0; in i2c_imx_trx_complete()
618 dev_dbg(&i2c_imx->adapter.dev, "<%s> No ACK\n", __func__); in i2c_imx_acked()
619 return -ENXIO; /* No ACK */ in i2c_imx_acked()
622 dev_dbg(&i2c_imx->adapter.dev, "<%s> ACK received\n", __func__); in i2c_imx_acked()
629 struct imx_i2c_clk_pair *i2c_clk_div = i2c_imx->hwdata->clk_div; in i2c_imx_set_clk()
633 if (i2c_imx->hwdata->has_err007805 && i2c_imx->bitrate > 384000) { in i2c_imx_set_clk()
634 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_set_clk()
636 i2c_imx->bitrate); in i2c_imx_set_clk()
637 i2c_imx->bitrate = 384000; in i2c_imx_set_clk()
641 if (i2c_imx->cur_clk == i2c_clk_rate) in i2c_imx_set_clk()
646 return -EINVAL; in i2c_imx_set_clk()
648 i2c_imx->cur_clk = i2c_clk_rate; in i2c_imx_set_clk()
650 div = DIV_ROUND_UP(i2c_clk_rate, i2c_imx->bitrate); in i2c_imx_set_clk()
653 else if (div > i2c_clk_div[i2c_imx->hwdata->ndivs - 1].div) in i2c_imx_set_clk()
654 i = i2c_imx->hwdata->ndivs - 1; in i2c_imx_set_clk()
660 i2c_imx->ifdr = i2c_clk_div[i].val; in i2c_imx_set_clk()
664 * It should be about one I2C clock period long. in i2c_imx_set_clk()
668 i2c_imx->disable_delay = DIV_ROUND_UP(500000U * i2c_clk_div[i].div, in i2c_imx_set_clk()
672 dev_dbg(&i2c_imx->adapter.dev, "I2C_CLK=%d, REQ DIV=%d\n", in i2c_imx_set_clk()
674 dev_dbg(&i2c_imx->adapter.dev, "IFDR[IC]=0x%x, REAL DIV=%d\n", in i2c_imx_set_clk()
691 ret = i2c_imx_set_clk(i2c_imx, ndata->new_rate); in i2c_imx_clk_notifier_call()
701 imx_i2c_write_reg(i2c_imx->ifdr, i2c_imx, IMX_I2C_IFDR); in i2c_imx_start()
703 imx_i2c_write_reg(i2c_imx->hwdata->i2sr_clr_opcode, i2c_imx, IMX_I2C_I2SR); in i2c_imx_start()
704 imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode, i2c_imx, IMX_I2C_I2CR); in i2c_imx_start()
733 if (!i2c_imx->stopped) { in i2c_imx_stop()
737 i2c_imx->stopped = 1; in i2c_imx_stop()
739 if (i2c_imx->dma) in i2c_imx_stop()
748 udelay(i2c_imx->disable_delay); in i2c_imx_stop()
751 if (!i2c_imx->stopped) in i2c_imx_stop()
755 temp = i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN; in i2c_imx_stop()
778 i2c_slave_event(i2c_imx->slave, event, val); in i2c_imx_slave_event()
779 i2c_imx->last_slave_event = event; in i2c_imx_slave_event()
786 while (i2c_imx->last_slave_event != I2C_SLAVE_STOP) { in i2c_imx_slave_finish_op()
787 switch (i2c_imx->last_slave_event) { in i2c_imx_slave_finish_op()
830 dev_dbg(&i2c_imx->adapter.dev, "read requested"); in i2c_imx_slave_handle()
841 dev_dbg(&i2c_imx->adapter.dev, "write requested"); in i2c_imx_slave_handle()
879 * 1, then everything is fine. If it returns -1, then the in i2c_imx_slave_handle()
884 hrtimer_try_to_cancel(&i2c_imx->slave_timer); in i2c_imx_slave_handle()
885 hrtimer_forward_now(&i2c_imx->slave_timer, I2C_IMX_CHECK_DELAY); in i2c_imx_slave_handle()
886 hrtimer_restart(&i2c_imx->slave_timer); in i2c_imx_slave_handle()
896 guard(spinlock_irqsave)(&i2c_imx->slave_lock); in i2c_imx_slave_timeout()
910 imx_i2c_write_reg((i2c_imx->slave->addr << 1), i2c_imx, IMX_I2C_IADR); in i2c_imx_slave_init()
915 temp = i2c_imx->hwdata->i2cr_ien_opcode; in i2c_imx_slave_init()
927 struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter); in i2c_imx_reg_slave()
930 if (i2c_imx->slave) in i2c_imx_reg_slave()
931 return -EBUSY; in i2c_imx_reg_slave()
933 i2c_imx->slave = client; in i2c_imx_reg_slave()
934 i2c_imx->last_slave_event = I2C_SLAVE_STOP; in i2c_imx_reg_slave()
937 ret = pm_runtime_resume_and_get(i2c_imx->adapter.dev.parent); in i2c_imx_reg_slave()
939 dev_err(&i2c_imx->adapter.dev, "failed to resume i2c controller"); in i2c_imx_reg_slave()
950 struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter); in i2c_imx_unreg_slave()
953 if (!i2c_imx->slave) in i2c_imx_unreg_slave()
954 return -EINVAL; in i2c_imx_unreg_slave()
961 i2c_imx->slave = NULL; in i2c_imx_unreg_slave()
964 ret = pm_runtime_put_sync(i2c_imx->adapter.dev.parent); in i2c_imx_unreg_slave()
966 dev_err(&i2c_imx->adapter.dev, "failed to suspend i2c controller"); in i2c_imx_unreg_slave()
973 i2c_imx->isr_result = 0; in i2c_imx_isr_acked()
976 i2c_imx->state = IMX_I2C_STATE_FAILED; in i2c_imx_isr_acked()
977 i2c_imx->isr_result = -ENXIO; in i2c_imx_isr_acked()
978 wake_up(&i2c_imx->queue); in i2c_imx_isr_acked()
981 return i2c_imx->isr_result; in i2c_imx_isr_acked()
992 if (i2c_imx->msg->len == i2c_imx->msg_buf_idx) in i2c_imx_isr_write()
995 imx_i2c_write_reg(i2c_imx->msg->buf[i2c_imx->msg_buf_idx++], i2c_imx, IMX_I2C_I2DR); in i2c_imx_isr_write()
1012 if ((i2c_imx->msg->len - 1) || (i2c_imx->msg->flags & I2C_M_RECV_LEN)) in i2c_imx_isr_read()
1025 if ((i2c_imx->msg->len - 1) == i2c_imx->msg_buf_idx) { in i2c_imx_isr_read_continue()
1026 if (i2c_imx->is_lastmsg) { in i2c_imx_isr_read_continue()
1033 i2c_imx->stopped = 1; in i2c_imx_isr_read_continue()
1039 * read -> repeat MSTA -> read/write in i2c_imx_isr_read_continue()
1048 } else if (i2c_imx->msg_buf_idx == (i2c_imx->msg->len - 2)) { in i2c_imx_isr_read_continue()
1054 i2c_imx->msg->buf[i2c_imx->msg_buf_idx++] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); in i2c_imx_isr_read_continue()
1062 i2c_imx->isr_result = -EPROTO; in i2c_imx_isr_read_block_data_len()
1063 i2c_imx->state = IMX_I2C_STATE_FAILED; in i2c_imx_isr_read_block_data_len()
1064 wake_up(&i2c_imx->queue); in i2c_imx_isr_read_block_data_len()
1066 i2c_imx->msg->len += len; in i2c_imx_isr_read_block_data_len()
1067 i2c_imx->msg->buf[i2c_imx->msg_buf_idx++] = len; in i2c_imx_isr_read_block_data_len()
1073 * This state machine handles I2C reception and transmission in non-DMA in i2c_imx_master_isr()
1078 switch (i2c_imx->state) { in i2c_imx_master_isr()
1080 i2c_imx->i2csr = status; in i2c_imx_master_isr()
1081 wake_up(&i2c_imx->queue); in i2c_imx_master_isr()
1087 i2c_imx->state = IMX_I2C_STATE_READ_CONTINUE; in i2c_imx_master_isr()
1092 if (i2c_imx->msg_buf_idx == i2c_imx->msg->len) { in i2c_imx_master_isr()
1093 i2c_imx->state = IMX_I2C_STATE_DONE; in i2c_imx_master_isr()
1094 wake_up(&i2c_imx->queue); in i2c_imx_master_isr()
1101 i2c_imx->state = IMX_I2C_STATE_READ_BLOCK_DATA_LEN; in i2c_imx_master_isr()
1106 i2c_imx->state = IMX_I2C_STATE_READ_CONTINUE; in i2c_imx_master_isr()
1112 i2c_imx->state = IMX_I2C_STATE_DONE; in i2c_imx_master_isr()
1113 wake_up(&i2c_imx->queue); in i2c_imx_master_isr()
1117 i2c_imx->i2csr = status; in i2c_imx_master_isr()
1118 i2c_imx->state = IMX_I2C_STATE_FAILED; in i2c_imx_master_isr()
1119 i2c_imx->isr_result = -EINVAL; in i2c_imx_master_isr()
1120 wake_up(&i2c_imx->queue); in i2c_imx_master_isr()
1131 scoped_guard(spinlock_irqsave, &i2c_imx->slave_lock) { in i2c_imx_isr()
1140 if (i2c_imx->slave) { in i2c_imx_isr()
1159 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_write()
1160 struct device *dev = &i2c_imx->adapter.dev; in i2c_imx_dma_write()
1162 i2c_imx->state = IMX_I2C_STATE_DMA; in i2c_imx_dma_write()
1164 dma->chan_using = dma->chan_tx; in i2c_imx_dma_write()
1165 dma->dma_transfer_dir = DMA_MEM_TO_DEV; in i2c_imx_dma_write()
1166 dma->dma_data_dir = DMA_TO_DEVICE; in i2c_imx_dma_write()
1167 dma->dma_len = msgs->len - 1; in i2c_imx_dma_write()
1182 &i2c_imx->dma->cmd_complete, in i2c_imx_dma_write()
1185 dmaengine_terminate_sync(dma->chan_using); in i2c_imx_dma_write()
1186 return -ETIMEDOUT; in i2c_imx_dma_write()
1197 return -ETIMEDOUT; in i2c_imx_dma_write()
1207 imx_i2c_write_reg(msgs->buf[msgs->len-1], in i2c_imx_dma_write()
1231 dev_dbg(&i2c_imx->adapter.dev, "<%s> setup bus\n", __func__); in i2c_imx_prepare_read()
1241 if (msgs->len - 1) in i2c_imx_prepare_read()
1259 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_read()
1260 struct device *dev = &i2c_imx->adapter.dev; in i2c_imx_dma_read()
1262 i2c_imx->state = IMX_I2C_STATE_DMA; in i2c_imx_dma_read()
1268 dev_dbg(&i2c_imx->adapter.dev, "<%s> read data\n", __func__); in i2c_imx_dma_read()
1270 dma->chan_using = dma->chan_rx; in i2c_imx_dma_read()
1271 dma->dma_transfer_dir = DMA_DEV_TO_MEM; in i2c_imx_dma_read()
1272 dma->dma_data_dir = DMA_FROM_DEVICE; in i2c_imx_dma_read()
1274 dma->dma_len = msgs->len - 2; in i2c_imx_dma_read()
1280 &i2c_imx->dma->cmd_complete, in i2c_imx_dma_read()
1283 dmaengine_terminate_sync(dma->chan_using); in i2c_imx_dma_read()
1284 return -ETIMEDOUT; in i2c_imx_dma_read()
1295 return -ETIMEDOUT; in i2c_imx_dma_read()
1304 /* read n-1 byte data */ in i2c_imx_dma_read()
1309 msgs->buf[msgs->len-2] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); in i2c_imx_dma_read()
1323 i2c_imx->stopped = 1; in i2c_imx_dma_read()
1326 if (!i2c_imx->stopped) in i2c_imx_dma_read()
1331 * read -> repeat MSTA -> read/write in i2c_imx_dma_read()
1340 msgs->buf[msgs->len-1] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); in i2c_imx_dma_read()
1350 dev_dbg(&i2c_imx->adapter.dev, "<%s> write slave address: addr=0x%x\n", in i2c_imx_atomic_write()
1361 dev_dbg(&i2c_imx->adapter.dev, "<%s> write data\n", __func__); in i2c_imx_atomic_write()
1364 for (i = 0; i < msgs->len; i++) { in i2c_imx_atomic_write()
1365 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_atomic_write()
1367 __func__, i, msgs->buf[i]); in i2c_imx_atomic_write()
1368 imx_i2c_write_reg(msgs->buf[i], i2c_imx, IMX_I2C_I2DR); in i2c_imx_atomic_write()
1381 dev_dbg(&i2c_imx->adapter.dev, "<%s> write slave address: addr=0x%x\n", in i2c_imx_write()
1384 i2c_imx->state = IMX_I2C_STATE_WRITE; in i2c_imx_write()
1385 i2c_imx->msg = msgs; in i2c_imx_write()
1386 i2c_imx->msg_buf_idx = 0; in i2c_imx_write()
1393 wait_event_timeout(i2c_imx->queue, in i2c_imx_write()
1394 i2c_imx->state == IMX_I2C_STATE_DONE || in i2c_imx_write()
1395 i2c_imx->state == IMX_I2C_STATE_FAILED, in i2c_imx_write()
1396 (msgs->len + 1) * HZ / 10); in i2c_imx_write()
1397 if (i2c_imx->state == IMX_I2C_STATE_FAILED) { in i2c_imx_write()
1398 dev_dbg(&i2c_imx->adapter.dev, "<%s> write failed with %d\n", in i2c_imx_write()
1399 __func__, i2c_imx->isr_result); in i2c_imx_write()
1400 return i2c_imx->isr_result; in i2c_imx_write()
1402 if (i2c_imx->state != IMX_I2C_STATE_DONE) { in i2c_imx_write()
1403 dev_err(&i2c_imx->adapter.dev, "<%s> write timedout\n", __func__); in i2c_imx_write()
1404 return -ETIMEDOUT; in i2c_imx_write()
1414 int block_data = msgs->flags & I2C_M_RECV_LEN; in i2c_imx_atomic_read()
1420 dev_dbg(&i2c_imx->adapter.dev, "<%s> read data\n", __func__); in i2c_imx_atomic_read()
1423 for (i = 0; i < msgs->len; i++) { in i2c_imx_atomic_read()
1432 * msgs->len. in i2c_imx_atomic_read()
1437 return -EPROTO; in i2c_imx_atomic_read()
1438 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_atomic_read()
1441 msgs->len += len; in i2c_imx_atomic_read()
1443 if (i == (msgs->len - 1)) { in i2c_imx_atomic_read()
1449 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_atomic_read()
1453 i2c_imx->stopped = 1; in i2c_imx_atomic_read()
1456 if (!i2c_imx->stopped) in i2c_imx_atomic_read()
1461 * read -> repeat MSTA -> read/write in i2c_imx_atomic_read()
1470 } else if (i == (msgs->len - 2)) { in i2c_imx_atomic_read()
1471 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_atomic_read()
1478 msgs->buf[0] = len; in i2c_imx_atomic_read()
1480 msgs->buf[i] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); in i2c_imx_atomic_read()
1481 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_atomic_read()
1483 __func__, i, msgs->buf[i]); in i2c_imx_atomic_read()
1491 int block_data = msgs->flags & I2C_M_RECV_LEN; in i2c_imx_read()
1493 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_read()
1497 i2c_imx->is_lastmsg = is_lastmsg; in i2c_imx_read()
1500 i2c_imx->state = IMX_I2C_STATE_READ_BLOCK_DATA; in i2c_imx_read()
1502 i2c_imx->state = IMX_I2C_STATE_READ; in i2c_imx_read()
1503 i2c_imx->msg = msgs; in i2c_imx_read()
1504 i2c_imx->msg_buf_idx = 0; in i2c_imx_read()
1511 wait_event_timeout(i2c_imx->queue, in i2c_imx_read()
1512 i2c_imx->state == IMX_I2C_STATE_DONE || in i2c_imx_read()
1513 i2c_imx->state == IMX_I2C_STATE_FAILED, in i2c_imx_read()
1514 (msgs->len + 1) * HZ / 10); in i2c_imx_read()
1515 if (i2c_imx->state == IMX_I2C_STATE_FAILED) { in i2c_imx_read()
1516 dev_dbg(&i2c_imx->adapter.dev, "<%s> read failed with %d\n", in i2c_imx_read()
1517 __func__, i2c_imx->isr_result); in i2c_imx_read()
1518 return i2c_imx->isr_result; in i2c_imx_read()
1520 if (i2c_imx->state != IMX_I2C_STATE_DONE) { in i2c_imx_read()
1521 dev_err(&i2c_imx->adapter.dev, "<%s> read timedout\n", __func__); in i2c_imx_read()
1522 return -ETIMEDOUT; in i2c_imx_read()
1524 if (!i2c_imx->stopped) in i2c_imx_read()
1546 if (!atomic && i2c_imx->adapter.bus_recovery_info) { in i2c_imx_xfer_common()
1547 i2c_recover_bus(&i2c_imx->adapter); in i2c_imx_xfer_common()
1557 if (i == num - 1) in i2c_imx_xfer_common()
1561 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1570 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1575 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1582 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1591 use_dma = i2c_imx->dma && msgs[i].len >= DMA_THRESHOLD && in i2c_imx_xfer_common()
1594 int block_data = msgs->flags & I2C_M_RECV_LEN; in i2c_imx_xfer_common()
1618 dev_dbg(&i2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__, in i2c_imx_xfer_common()
1622 if (i2c_imx->slave) in i2c_imx_xfer_common()
1634 result = pm_runtime_resume_and_get(i2c_imx->adapter.dev.parent); in i2c_imx_xfer()
1640 pm_runtime_put_autosuspend(i2c_imx->adapter.dev.parent); in i2c_imx_xfer()
1651 result = clk_enable(i2c_imx->clk); in i2c_imx_xfer_atomic()
1657 clk_disable(i2c_imx->clk); in i2c_imx_xfer_atomic()
1672 struct i2c_bus_recovery_info *bri = &i2c_imx->rinfo; in i2c_imx_init_recovery_info()
1674 bri->pinctrl = devm_pinctrl_get(&pdev->dev); in i2c_imx_init_recovery_info()
1675 if (IS_ERR(bri->pinctrl)) in i2c_imx_init_recovery_info()
1676 return PTR_ERR(bri->pinctrl); in i2c_imx_init_recovery_info()
1678 i2c_imx->adapter.bus_recovery_info = bri; in i2c_imx_init_recovery_info()
1701 struct imxi2c_platform_data *pdata = dev_get_platdata(&pdev->dev); in i2c_imx_probe()
1709 return dev_err_probe(&pdev->dev, irq, "can't get IRQ\n"); in i2c_imx_probe()
1713 return dev_err_probe(&pdev->dev, PTR_ERR(base), "can't get IO memory\n"); in i2c_imx_probe()
1715 phy_addr = (dma_addr_t)res->start; in i2c_imx_probe()
1716 i2c_imx = devm_kzalloc(&pdev->dev, sizeof(*i2c_imx), GFP_KERNEL); in i2c_imx_probe()
1718 return -ENOMEM; in i2c_imx_probe()
1720 spin_lock_init(&i2c_imx->slave_lock); in i2c_imx_probe()
1721 hrtimer_setup(&i2c_imx->slave_timer, i2c_imx_slave_timeout, CLOCK_MONOTONIC, in i2c_imx_probe()
1724 match = device_get_match_data(&pdev->dev); in i2c_imx_probe()
1726 i2c_imx->hwdata = match; in i2c_imx_probe()
1728 i2c_imx->hwdata = (struct imx_i2c_hwdata *) in i2c_imx_probe()
1729 platform_get_device_id(pdev)->driver_data; in i2c_imx_probe()
1732 strscpy(i2c_imx->adapter.name, pdev->name, sizeof(i2c_imx->adapter.name)); in i2c_imx_probe()
1733 i2c_imx->adapter.owner = THIS_MODULE; in i2c_imx_probe()
1734 i2c_imx->adapter.algo = &i2c_imx_algo; in i2c_imx_probe()
1735 i2c_imx->adapter.dev.parent = &pdev->dev; in i2c_imx_probe()
1736 i2c_imx->adapter.nr = pdev->id; in i2c_imx_probe()
1737 i2c_imx->adapter.dev.of_node = pdev->dev.of_node; in i2c_imx_probe()
1738 i2c_imx->base = base; in i2c_imx_probe()
1739 ACPI_COMPANION_SET(&i2c_imx->adapter.dev, ACPI_COMPANION(&pdev->dev)); in i2c_imx_probe()
1742 i2c_imx->clk = devm_clk_get_enabled(&pdev->dev, NULL); in i2c_imx_probe()
1743 if (IS_ERR(i2c_imx->clk)) in i2c_imx_probe()
1744 return dev_err_probe(&pdev->dev, PTR_ERR(i2c_imx->clk), in i2c_imx_probe()
1748 init_waitqueue_head(&i2c_imx->queue); in i2c_imx_probe()
1751 i2c_set_adapdata(&i2c_imx->adapter, i2c_imx); in i2c_imx_probe()
1756 pm_runtime_set_autosuspend_delay(&pdev->dev, I2C_PM_TIMEOUT); in i2c_imx_probe()
1757 pm_runtime_use_autosuspend(&pdev->dev); in i2c_imx_probe()
1758 pm_runtime_set_active(&pdev->dev); in i2c_imx_probe()
1759 pm_runtime_enable(&pdev->dev); in i2c_imx_probe()
1761 ret = pm_runtime_get_sync(&pdev->dev); in i2c_imx_probe()
1767 pdev->name, i2c_imx); in i2c_imx_probe()
1769 dev_err(&pdev->dev, "can't claim irq %d\n", irq); in i2c_imx_probe()
1774 * We use the single-master property for backward compatibility. in i2c_imx_probe()
1777 i2c_imx->multi_master = !of_property_read_bool(pdev->dev.of_node, "single-master"); in i2c_imx_probe()
1780 i2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ; in i2c_imx_probe()
1781 ret = of_property_read_u32(pdev->dev.of_node, in i2c_imx_probe()
1782 "clock-frequency", &i2c_imx->bitrate); in i2c_imx_probe()
1783 if (ret < 0 && pdata && pdata->bitrate) in i2c_imx_probe()
1784 i2c_imx->bitrate = pdata->bitrate; in i2c_imx_probe()
1785 i2c_imx->clk_change_nb.notifier_call = i2c_imx_clk_notifier_call; in i2c_imx_probe()
1786 clk_notifier_register(i2c_imx->clk, &i2c_imx->clk_change_nb); in i2c_imx_probe()
1787 ret = i2c_imx_set_clk(i2c_imx, clk_get_rate(i2c_imx->clk)); in i2c_imx_probe()
1789 dev_err(&pdev->dev, "can't get I2C clock\n"); in i2c_imx_probe()
1798 if (ret == -EPROBE_DEFER) in i2c_imx_probe()
1808 if (ret == -EPROBE_DEFER) { in i2c_imx_probe()
1809 dev_err_probe(&pdev->dev, ret, "can't get DMA channels\n"); in i2c_imx_probe()
1811 } else if (ret == -ENODEV) { in i2c_imx_probe()
1812 dev_dbg(&pdev->dev, "Only use PIO mode\n"); in i2c_imx_probe()
1814 dev_warn(&pdev->dev, "Failed to setup DMA (%pe), only use PIO mode\n", in i2c_imx_probe()
1820 ret = i2c_add_numbered_adapter(&i2c_imx->adapter); in i2c_imx_probe()
1824 pm_runtime_put_autosuspend(&pdev->dev); in i2c_imx_probe()
1826 dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq); in i2c_imx_probe()
1827 dev_dbg(&i2c_imx->adapter.dev, "device resources: %pR\n", res); in i2c_imx_probe()
1828 dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n", in i2c_imx_probe()
1829 i2c_imx->adapter.name); in i2c_imx_probe()
1830 dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n"); in i2c_imx_probe()
1835 clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb); in i2c_imx_probe()
1838 pm_runtime_put_noidle(&pdev->dev); in i2c_imx_probe()
1839 pm_runtime_disable(&pdev->dev); in i2c_imx_probe()
1840 pm_runtime_set_suspended(&pdev->dev); in i2c_imx_probe()
1841 pm_runtime_dont_use_autosuspend(&pdev->dev); in i2c_imx_probe()
1850 ret = pm_runtime_get_sync(&pdev->dev); in i2c_imx_remove()
1852 hrtimer_cancel(&i2c_imx->slave_timer); in i2c_imx_remove()
1855 dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n"); in i2c_imx_remove()
1856 i2c_del_adapter(&i2c_imx->adapter); in i2c_imx_remove()
1858 if (i2c_imx->dma) in i2c_imx_remove()
1869 clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb); in i2c_imx_remove()
1874 pm_runtime_put_noidle(&pdev->dev); in i2c_imx_remove()
1875 pm_runtime_disable(&pdev->dev); in i2c_imx_remove()
1882 clk_disable(i2c_imx->clk); in i2c_imx_runtime_suspend()
1895 ret = clk_enable(i2c_imx->clk); in i2c_imx_runtime_resume()
1911 * after runtime PM is re-enabled (in resume_early()). However, this in i2c_imx_suspend()
1920 * Finally, the resume() callback re-enables autosuspend, ensuring in i2c_imx_suspend()