Lines Matching +full:vf610 +full:- +full:i2c
1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2002 Motorola GSG-China
9 * Implementation of I2C Adapter/Algorithm Driver
10 * for I2C Bus integrated in Freescale i.MX/MXC processors
12 * Derived from Motorola GSG China I2C example driver
28 #include <linux/dma-mapping.h>
34 #include <linux/i2c.h>
45 #include <linux/platform_data/i2c-imx.h>
52 #define DRIVER_NAME "imx-i2c"
63 /* IMX I2C registers:
64 * the I2C register offset is different between SoCs,
71 #define IMX_I2C_IADR 0x00 /* i2c slave address */
72 #define IMX_I2C_IFDR 0x01 /* i2c frequency divider */
73 #define IMX_I2C_I2CR 0x02 /* i2c control */
74 #define IMX_I2C_I2SR 0x03 /* i2c status */
75 #define IMX_I2C_I2DR 0x04 /* i2c transfer data */
80 #define IMX_I2C_IBIC 0x05 /* i2c bus interrupt config */
85 /* Bits of IMX I2C registers */
104 * - write zero to clear(w0c) INT flag on i.MX,
105 * - but write one to clear(w1c) INT flag on Vybrid.
106 * 2) I2CR: I2C module enable operation also differ between SoCs:
107 * - set I2CR_IEN bit enable the module on i.MX,
108 * - but clear I2CR_IEN bit enable the module on Vybrid.
119 * taken from table 26-5, p.26-9, Freescale i.MX
146 /* Vybrid VF610 clock divider, register value pairs */
247 .name = "imx1-i2c",
250 .name = "imx21-i2c",
259 { .compatible = "fsl,imx1-i2c", .data = &imx1_i2c_hwdata, },
260 { .compatible = "fsl,imx21-i2c", .data = &imx21_i2c_hwdata, },
261 { .compatible = "fsl,vf610-i2c", .data = &vf610_i2c_hwdata, },
274 return i2c_imx->hwdata->devtype == IMX1_I2C; in is_imx1_i2c()
279 return i2c_imx->hwdata->devtype == VF610_I2C; in is_vf610_i2c()
285 writeb(val, i2c_imx->base + (reg << i2c_imx->hwdata->regshift)); in imx_i2c_write_reg()
291 return readb(i2c_imx->base + (reg << i2c_imx->hwdata->regshift)); in imx_i2c_read_reg()
303 temp = ~i2c_imx->hwdata->i2sr_clr_opcode ^ bits; in i2c_imx_clear_irq()
307 /* Set up i2c controller register and i2c status register to default value. */
310 imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN, in i2c_imx_reset_regs()
321 struct device *dev = &i2c_imx->adapter.dev; in i2c_imx_dma_request()
328 dma->chan_tx = dma_request_chan(dev, "tx"); in i2c_imx_dma_request()
329 if (IS_ERR(dma->chan_tx)) { in i2c_imx_dma_request()
330 ret = PTR_ERR(dma->chan_tx); in i2c_imx_dma_request()
331 if (ret != -ENODEV && ret != -EPROBE_DEFER) in i2c_imx_dma_request()
337 (IMX_I2C_I2DR << i2c_imx->hwdata->regshift); in i2c_imx_dma_request()
341 ret = dmaengine_slave_config(dma->chan_tx, &dma_sconfig); in i2c_imx_dma_request()
347 dma->chan_rx = dma_request_chan(dev, "rx"); in i2c_imx_dma_request()
348 if (IS_ERR(dma->chan_rx)) { in i2c_imx_dma_request()
349 ret = PTR_ERR(dma->chan_rx); in i2c_imx_dma_request()
350 if (ret != -ENODEV && ret != -EPROBE_DEFER) in i2c_imx_dma_request()
356 (IMX_I2C_I2DR << i2c_imx->hwdata->regshift); in i2c_imx_dma_request()
360 ret = dmaengine_slave_config(dma->chan_rx, &dma_sconfig); in i2c_imx_dma_request()
366 i2c_imx->dma = dma; in i2c_imx_dma_request()
367 init_completion(&dma->cmd_complete); in i2c_imx_dma_request()
369 dma_chan_name(dma->chan_tx), dma_chan_name(dma->chan_rx)); in i2c_imx_dma_request()
374 dma_release_channel(dma->chan_rx); in i2c_imx_dma_request()
376 dma_release_channel(dma->chan_tx); in i2c_imx_dma_request()
384 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_callback()
386 dma_unmap_single(dma->chan_using->device->dev, dma->dma_buf, in i2c_imx_dma_callback()
387 dma->dma_len, dma->dma_data_dir); in i2c_imx_dma_callback()
388 complete(&dma->cmd_complete); in i2c_imx_dma_callback()
394 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_xfer()
396 struct device *dev = &i2c_imx->adapter.dev; in i2c_imx_dma_xfer()
397 struct device *chan_dev = dma->chan_using->device->dev; in i2c_imx_dma_xfer()
399 dma->dma_buf = dma_map_single(chan_dev, msgs->buf, in i2c_imx_dma_xfer()
400 dma->dma_len, dma->dma_data_dir); in i2c_imx_dma_xfer()
401 if (dma_mapping_error(chan_dev, dma->dma_buf)) { in i2c_imx_dma_xfer()
406 txdesc = dmaengine_prep_slave_single(dma->chan_using, dma->dma_buf, in i2c_imx_dma_xfer()
407 dma->dma_len, dma->dma_transfer_dir, in i2c_imx_dma_xfer()
414 reinit_completion(&dma->cmd_complete); in i2c_imx_dma_xfer()
415 txdesc->callback = i2c_imx_dma_callback; in i2c_imx_dma_xfer()
416 txdesc->callback_param = i2c_imx; in i2c_imx_dma_xfer()
422 dma_async_issue_pending(dma->chan_using); in i2c_imx_dma_xfer()
426 dmaengine_terminate_sync(dma->chan_using); in i2c_imx_dma_xfer()
428 dma_unmap_single(chan_dev, dma->dma_buf, in i2c_imx_dma_xfer()
429 dma->dma_len, dma->dma_data_dir); in i2c_imx_dma_xfer()
431 return -EINVAL; in i2c_imx_dma_xfer()
436 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_free()
438 dma->dma_buf = 0; in i2c_imx_dma_free()
439 dma->dma_len = 0; in i2c_imx_dma_free()
441 dma_release_channel(dma->chan_tx); in i2c_imx_dma_free()
442 dma->chan_tx = NULL; in i2c_imx_dma_free()
444 dma_release_channel(dma->chan_rx); in i2c_imx_dma_free()
445 dma->chan_rx = NULL; in i2c_imx_dma_free()
447 dma->chan_using = NULL; in i2c_imx_dma_free()
461 return -EAGAIN; in i2c_imx_bus_busy()
465 i2c_imx->stopped = 0; in i2c_imx_bus_busy()
469 i2c_imx->stopped = 1; in i2c_imx_bus_busy()
473 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_bus_busy()
474 "<%s> I2C bus is busy\n", __func__); in i2c_imx_bus_busy()
475 return -ETIMEDOUT; in i2c_imx_bus_busy()
489 void __iomem *addr = i2c_imx->base + (IMX_I2C_I2SR << i2c_imx->hwdata->regshift); in i2c_imx_trx_complete()
496 * Set the value hard as it is done for the non-atomic use-case. in i2c_imx_trx_complete()
503 i2c_imx->i2csr = regval; in i2c_imx_trx_complete()
506 wait_event_timeout(i2c_imx->queue, i2c_imx->i2csr & I2SR_IIF, HZ / 10); in i2c_imx_trx_complete()
509 if (unlikely(!(i2c_imx->i2csr & I2SR_IIF))) { in i2c_imx_trx_complete()
510 dev_dbg(&i2c_imx->adapter.dev, "<%s> Timeout\n", __func__); in i2c_imx_trx_complete()
511 return -ETIMEDOUT; in i2c_imx_trx_complete()
515 if (i2c_imx->i2csr & I2SR_IAL) { in i2c_imx_trx_complete()
516 dev_dbg(&i2c_imx->adapter.dev, "<%s> Arbitration lost\n", __func__); in i2c_imx_trx_complete()
519 i2c_imx->i2csr = 0; in i2c_imx_trx_complete()
520 return -EAGAIN; in i2c_imx_trx_complete()
523 dev_dbg(&i2c_imx->adapter.dev, "<%s> TRX complete\n", __func__); in i2c_imx_trx_complete()
524 i2c_imx->i2csr = 0; in i2c_imx_trx_complete()
531 dev_dbg(&i2c_imx->adapter.dev, "<%s> No ACK\n", __func__); in i2c_imx_acked()
532 return -ENXIO; /* No ACK */ in i2c_imx_acked()
535 dev_dbg(&i2c_imx->adapter.dev, "<%s> ACK received\n", __func__); in i2c_imx_acked()
542 struct imx_i2c_clk_pair *i2c_clk_div = i2c_imx->hwdata->clk_div; in i2c_imx_set_clk()
547 if (i2c_imx->cur_clk == i2c_clk_rate) in i2c_imx_set_clk()
550 i2c_imx->cur_clk = i2c_clk_rate; in i2c_imx_set_clk()
552 div = DIV_ROUND_UP(i2c_clk_rate, i2c_imx->bitrate); in i2c_imx_set_clk()
555 else if (div > i2c_clk_div[i2c_imx->hwdata->ndivs - 1].div) in i2c_imx_set_clk()
556 i = i2c_imx->hwdata->ndivs - 1; in i2c_imx_set_clk()
562 i2c_imx->ifdr = i2c_clk_div[i].val; in i2c_imx_set_clk()
566 * It should be about one I2C clock period long. in i2c_imx_set_clk()
567 * This delay is used in I2C bus disable function in i2c_imx_set_clk()
570 i2c_imx->disable_delay = DIV_ROUND_UP(500000U * i2c_clk_div[i].div, in i2c_imx_set_clk()
574 dev_dbg(&i2c_imx->adapter.dev, "I2C_CLK=%d, REQ DIV=%d\n", in i2c_imx_set_clk()
576 dev_dbg(&i2c_imx->adapter.dev, "IFDR[IC]=0x%x, REAL DIV=%d\n", in i2c_imx_set_clk()
590 i2c_imx_set_clk(i2c_imx, ndata->new_rate); in i2c_imx_clk_notifier_call()
600 imx_i2c_write_reg(i2c_imx->ifdr, i2c_imx, IMX_I2C_IFDR); in i2c_imx_start()
601 /* Enable I2C controller */ in i2c_imx_start()
602 imx_i2c_write_reg(i2c_imx->hwdata->i2sr_clr_opcode, i2c_imx, IMX_I2C_I2SR); in i2c_imx_start()
603 imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode, i2c_imx, IMX_I2C_I2CR); in i2c_imx_start()
611 /* Start I2C transaction */ in i2c_imx_start()
632 if (!i2c_imx->stopped) { in i2c_imx_stop()
633 /* Stop I2C transaction */ in i2c_imx_stop()
636 i2c_imx->stopped = 1; in i2c_imx_stop()
638 if (i2c_imx->dma) in i2c_imx_stop()
647 udelay(i2c_imx->disable_delay); in i2c_imx_stop()
650 if (!i2c_imx->stopped) in i2c_imx_stop()
653 /* Disable I2C controller */ in i2c_imx_stop()
654 temp = i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN, in i2c_imx_stop()
660 * Note: IBIC register will be cleared after disabled i2c module.
677 i2c_slave_event(i2c_imx->slave, event, val); in i2c_imx_slave_event()
678 i2c_imx->last_slave_event = event; in i2c_imx_slave_event()
685 while (i2c_imx->last_slave_event != I2C_SLAVE_STOP) { in i2c_imx_slave_finish_op()
686 switch (i2c_imx->last_slave_event) { in i2c_imx_slave_finish_op()
718 dev_dbg(&i2c_imx->adapter.dev, "read requested"); in i2c_imx_slave_isr()
729 dev_dbg(&i2c_imx->adapter.dev, "write requested"); in i2c_imx_slave_isr()
745 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_slave_isr()
772 imx_i2c_write_reg((i2c_imx->slave->addr << 1), i2c_imx, IMX_I2C_IADR); in i2c_imx_slave_init()
777 temp = i2c_imx->hwdata->i2cr_ien_opcode; in i2c_imx_slave_init()
780 /* Enable interrupt from i2c module */ in i2c_imx_slave_init()
789 struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter); in i2c_imx_reg_slave()
792 if (i2c_imx->slave) in i2c_imx_reg_slave()
793 return -EBUSY; in i2c_imx_reg_slave()
795 i2c_imx->slave = client; in i2c_imx_reg_slave()
796 i2c_imx->last_slave_event = I2C_SLAVE_STOP; in i2c_imx_reg_slave()
799 ret = pm_runtime_resume_and_get(i2c_imx->adapter.dev.parent); in i2c_imx_reg_slave()
801 dev_err(&i2c_imx->adapter.dev, "failed to resume i2c controller"); in i2c_imx_reg_slave()
812 struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter); in i2c_imx_unreg_slave()
815 if (!i2c_imx->slave) in i2c_imx_unreg_slave()
816 return -EINVAL; in i2c_imx_unreg_slave()
823 i2c_imx->slave = NULL; in i2c_imx_unreg_slave()
826 ret = pm_runtime_put_sync(i2c_imx->adapter.dev.parent); in i2c_imx_unreg_slave()
828 dev_err(&i2c_imx->adapter.dev, "failed to suspend i2c controller"); in i2c_imx_unreg_slave()
836 i2c_imx->i2csr = status; in i2c_imx_master_isr()
837 wake_up(&i2c_imx->queue); in i2c_imx_master_isr()
852 if (i2c_imx->slave) { in i2c_imx_isr()
855 } else if (i2c_imx->last_slave_event != in i2c_imx_isr()
873 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_write()
874 struct device *dev = &i2c_imx->adapter.dev; in i2c_imx_dma_write()
876 dma->chan_using = dma->chan_tx; in i2c_imx_dma_write()
877 dma->dma_transfer_dir = DMA_MEM_TO_DEV; in i2c_imx_dma_write()
878 dma->dma_data_dir = DMA_TO_DEVICE; in i2c_imx_dma_write()
879 dma->dma_len = msgs->len - 1; in i2c_imx_dma_write()
894 &i2c_imx->dma->cmd_complete, in i2c_imx_dma_write()
897 dmaengine_terminate_sync(dma->chan_using); in i2c_imx_dma_write()
898 return -ETIMEDOUT; in i2c_imx_dma_write()
909 return -ETIMEDOUT; in i2c_imx_dma_write()
919 imx_i2c_write_reg(msgs->buf[msgs->len-1], in i2c_imx_dma_write()
935 struct imx_i2c_dma *dma = i2c_imx->dma; in i2c_imx_dma_read()
936 struct device *dev = &i2c_imx->adapter.dev; in i2c_imx_dma_read()
939 dma->chan_using = dma->chan_rx; in i2c_imx_dma_read()
940 dma->dma_transfer_dir = DMA_DEV_TO_MEM; in i2c_imx_dma_read()
941 dma->dma_data_dir = DMA_FROM_DEVICE; in i2c_imx_dma_read()
943 dma->dma_len = msgs->len - 2; in i2c_imx_dma_read()
949 &i2c_imx->dma->cmd_complete, in i2c_imx_dma_read()
952 dmaengine_terminate_sync(dma->chan_using); in i2c_imx_dma_read()
953 return -ETIMEDOUT; in i2c_imx_dma_read()
964 return -ETIMEDOUT; in i2c_imx_dma_read()
973 /* read n-1 byte data */ in i2c_imx_dma_read()
978 msgs->buf[msgs->len-2] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); in i2c_imx_dma_read()
992 i2c_imx->stopped = 1; in i2c_imx_dma_read()
995 if (!i2c_imx->stopped) in i2c_imx_dma_read()
999 * For i2c master receiver repeat restart operation like: in i2c_imx_dma_read()
1000 * read -> repeat MSTA -> read/write in i2c_imx_dma_read()
1009 msgs->buf[msgs->len-1] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); in i2c_imx_dma_read()
1019 dev_dbg(&i2c_imx->adapter.dev, "<%s> write slave address: addr=0x%x\n", in i2c_imx_write()
1030 dev_dbg(&i2c_imx->adapter.dev, "<%s> write data\n", __func__); in i2c_imx_write()
1033 for (i = 0; i < msgs->len; i++) { in i2c_imx_write()
1034 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_write()
1036 __func__, i, msgs->buf[i]); in i2c_imx_write()
1037 imx_i2c_write_reg(msgs->buf[i], i2c_imx, IMX_I2C_I2DR); in i2c_imx_write()
1053 int block_data = msgs->flags & I2C_M_RECV_LEN; in i2c_imx_read()
1054 int use_dma = i2c_imx->dma && msgs->len >= DMA_THRESHOLD && !block_data; in i2c_imx_read()
1056 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_read()
1069 dev_dbg(&i2c_imx->adapter.dev, "<%s> setup bus\n", __func__); in i2c_imx_read()
1079 if ((msgs->len - 1) || block_data) in i2c_imx_read()
1086 dev_dbg(&i2c_imx->adapter.dev, "<%s> read data\n", __func__); in i2c_imx_read()
1092 for (i = 0; i < msgs->len; i++) { in i2c_imx_read()
1101 * msgs->len. in i2c_imx_read()
1106 return -EPROTO; in i2c_imx_read()
1107 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_read()
1110 msgs->len += len; in i2c_imx_read()
1112 if (i == (msgs->len - 1)) { in i2c_imx_read()
1118 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_read()
1122 i2c_imx->stopped = 1; in i2c_imx_read()
1125 if (!i2c_imx->stopped) in i2c_imx_read()
1129 * For i2c master receiver repeat restart operation like: in i2c_imx_read()
1130 * read -> repeat MSTA -> read/write in i2c_imx_read()
1139 } else if (i == (msgs->len - 2)) { in i2c_imx_read()
1140 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_read()
1147 msgs->buf[0] = len; in i2c_imx_read()
1149 msgs->buf[i] = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR); in i2c_imx_read()
1150 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_read()
1152 __func__, i, msgs->buf[i]); in i2c_imx_read()
1165 /* Start I2C transfer */ in i2c_imx_xfer_common()
1172 if (!atomic && i2c_imx->adapter.bus_recovery_info) { in i2c_imx_xfer_common()
1173 i2c_recover_bus(&i2c_imx->adapter); in i2c_imx_xfer_common()
1183 if (i == num - 1) in i2c_imx_xfer_common()
1187 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1196 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1201 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1208 dev_dbg(&i2c_imx->adapter.dev, in i2c_imx_xfer_common()
1220 i2c_imx->dma && msgs[i].len >= DMA_THRESHOLD) in i2c_imx_xfer_common()
1230 /* Stop I2C transfer */ in i2c_imx_xfer_common()
1233 dev_dbg(&i2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__, in i2c_imx_xfer_common()
1237 if (i2c_imx->slave) in i2c_imx_xfer_common()
1249 result = pm_runtime_resume_and_get(i2c_imx->adapter.dev.parent); in i2c_imx_xfer()
1255 pm_runtime_mark_last_busy(i2c_imx->adapter.dev.parent); in i2c_imx_xfer()
1256 pm_runtime_put_autosuspend(i2c_imx->adapter.dev.parent); in i2c_imx_xfer()
1267 result = clk_enable(i2c_imx->clk); in i2c_imx_xfer_atomic()
1273 clk_disable(i2c_imx->clk); in i2c_imx_xfer_atomic()
1284 pinctrl_select_state(i2c_imx->pinctrl, i2c_imx->pinctrl_pins_gpio); in i2c_imx_prepare_recovery()
1293 pinctrl_select_state(i2c_imx->pinctrl, i2c_imx->pinctrl_pins_default); in i2c_imx_unprepare_recovery()
1306 struct i2c_bus_recovery_info *rinfo = &i2c_imx->rinfo; in i2c_imx_init_recovery_info()
1308 i2c_imx->pinctrl = devm_pinctrl_get(&pdev->dev); in i2c_imx_init_recovery_info()
1309 if (!i2c_imx->pinctrl || IS_ERR(i2c_imx->pinctrl)) { in i2c_imx_init_recovery_info()
1310 dev_info(&pdev->dev, "can't get pinctrl, bus recovery not supported\n"); in i2c_imx_init_recovery_info()
1311 return PTR_ERR(i2c_imx->pinctrl); in i2c_imx_init_recovery_info()
1314 i2c_imx->pinctrl_pins_default = pinctrl_lookup_state(i2c_imx->pinctrl, in i2c_imx_init_recovery_info()
1316 i2c_imx->pinctrl_pins_gpio = pinctrl_lookup_state(i2c_imx->pinctrl, in i2c_imx_init_recovery_info()
1318 rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN); in i2c_imx_init_recovery_info()
1319 rinfo->scl_gpiod = devm_gpiod_get(&pdev->dev, "scl", GPIOD_OUT_HIGH_OPEN_DRAIN); in i2c_imx_init_recovery_info()
1321 if (PTR_ERR(rinfo->sda_gpiod) == -EPROBE_DEFER || in i2c_imx_init_recovery_info()
1322 PTR_ERR(rinfo->scl_gpiod) == -EPROBE_DEFER) { in i2c_imx_init_recovery_info()
1323 return -EPROBE_DEFER; in i2c_imx_init_recovery_info()
1324 } else if (IS_ERR(rinfo->sda_gpiod) || in i2c_imx_init_recovery_info()
1325 IS_ERR(rinfo->scl_gpiod) || in i2c_imx_init_recovery_info()
1326 IS_ERR(i2c_imx->pinctrl_pins_default) || in i2c_imx_init_recovery_info()
1327 IS_ERR(i2c_imx->pinctrl_pins_gpio)) { in i2c_imx_init_recovery_info()
1328 dev_dbg(&pdev->dev, "recovery information incomplete\n"); in i2c_imx_init_recovery_info()
1332 dev_dbg(&pdev->dev, "using scl%s for recovery\n", in i2c_imx_init_recovery_info()
1333 rinfo->sda_gpiod ? ",sda" : ""); in i2c_imx_init_recovery_info()
1335 rinfo->prepare_recovery = i2c_imx_prepare_recovery; in i2c_imx_init_recovery_info()
1336 rinfo->unprepare_recovery = i2c_imx_unprepare_recovery; in i2c_imx_init_recovery_info()
1337 rinfo->recover_bus = i2c_generic_scl_recovery; in i2c_imx_init_recovery_info()
1338 i2c_imx->adapter.bus_recovery_info = rinfo; in i2c_imx_init_recovery_info()
1361 struct imxi2c_platform_data *pdata = dev_get_platdata(&pdev->dev); in i2c_imx_probe()
1372 base = devm_ioremap_resource(&pdev->dev, res); in i2c_imx_probe()
1376 phy_addr = (dma_addr_t)res->start; in i2c_imx_probe()
1377 i2c_imx = devm_kzalloc(&pdev->dev, sizeof(*i2c_imx), GFP_KERNEL); in i2c_imx_probe()
1379 return -ENOMEM; in i2c_imx_probe()
1381 match = device_get_match_data(&pdev->dev); in i2c_imx_probe()
1383 i2c_imx->hwdata = match; in i2c_imx_probe()
1385 i2c_imx->hwdata = (struct imx_i2c_hwdata *) in i2c_imx_probe()
1386 platform_get_device_id(pdev)->driver_data; in i2c_imx_probe()
1389 strscpy(i2c_imx->adapter.name, pdev->name, sizeof(i2c_imx->adapter.name)); in i2c_imx_probe()
1390 i2c_imx->adapter.owner = THIS_MODULE; in i2c_imx_probe()
1391 i2c_imx->adapter.algo = &i2c_imx_algo; in i2c_imx_probe()
1392 i2c_imx->adapter.dev.parent = &pdev->dev; in i2c_imx_probe()
1393 i2c_imx->adapter.nr = pdev->id; in i2c_imx_probe()
1394 i2c_imx->adapter.dev.of_node = pdev->dev.of_node; in i2c_imx_probe()
1395 i2c_imx->base = base; in i2c_imx_probe()
1396 ACPI_COMPANION_SET(&i2c_imx->adapter.dev, ACPI_COMPANION(&pdev->dev)); in i2c_imx_probe()
1398 /* Get I2C clock */ in i2c_imx_probe()
1399 i2c_imx->clk = devm_clk_get(&pdev->dev, NULL); in i2c_imx_probe()
1400 if (IS_ERR(i2c_imx->clk)) in i2c_imx_probe()
1401 return dev_err_probe(&pdev->dev, PTR_ERR(i2c_imx->clk), in i2c_imx_probe()
1402 "can't get I2C clock\n"); in i2c_imx_probe()
1404 ret = clk_prepare_enable(i2c_imx->clk); in i2c_imx_probe()
1406 dev_err(&pdev->dev, "can't enable I2C clock, ret=%d\n", ret); in i2c_imx_probe()
1411 init_waitqueue_head(&i2c_imx->queue); in i2c_imx_probe()
1414 i2c_set_adapdata(&i2c_imx->adapter, i2c_imx); in i2c_imx_probe()
1419 pm_runtime_set_autosuspend_delay(&pdev->dev, I2C_PM_TIMEOUT); in i2c_imx_probe()
1420 pm_runtime_use_autosuspend(&pdev->dev); in i2c_imx_probe()
1421 pm_runtime_set_active(&pdev->dev); in i2c_imx_probe()
1422 pm_runtime_enable(&pdev->dev); in i2c_imx_probe()
1424 ret = pm_runtime_get_sync(&pdev->dev); in i2c_imx_probe()
1430 pdev->name, i2c_imx); in i2c_imx_probe()
1432 dev_err(&pdev->dev, "can't claim irq %d\n", irq); in i2c_imx_probe()
1437 i2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ; in i2c_imx_probe()
1438 ret = of_property_read_u32(pdev->dev.of_node, in i2c_imx_probe()
1439 "clock-frequency", &i2c_imx->bitrate); in i2c_imx_probe()
1440 if (ret < 0 && pdata && pdata->bitrate) in i2c_imx_probe()
1441 i2c_imx->bitrate = pdata->bitrate; in i2c_imx_probe()
1442 i2c_imx->clk_change_nb.notifier_call = i2c_imx_clk_notifier_call; in i2c_imx_probe()
1443 clk_notifier_register(i2c_imx->clk, &i2c_imx->clk_change_nb); in i2c_imx_probe()
1444 i2c_imx_set_clk(i2c_imx, clk_get_rate(i2c_imx->clk)); in i2c_imx_probe()
1451 if (ret == -EPROBE_DEFER) in i2c_imx_probe()
1454 /* Add I2C adapter */ in i2c_imx_probe()
1455 ret = i2c_add_numbered_adapter(&i2c_imx->adapter); in i2c_imx_probe()
1459 pm_runtime_mark_last_busy(&pdev->dev); in i2c_imx_probe()
1460 pm_runtime_put_autosuspend(&pdev->dev); in i2c_imx_probe()
1462 dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq); in i2c_imx_probe()
1463 dev_dbg(&i2c_imx->adapter.dev, "device resources: %pR\n", res); in i2c_imx_probe()
1464 dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n", in i2c_imx_probe()
1465 i2c_imx->adapter.name); in i2c_imx_probe()
1466 dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n"); in i2c_imx_probe()
1474 clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb); in i2c_imx_probe()
1477 pm_runtime_put_noidle(&pdev->dev); in i2c_imx_probe()
1478 pm_runtime_disable(&pdev->dev); in i2c_imx_probe()
1479 pm_runtime_set_suspended(&pdev->dev); in i2c_imx_probe()
1480 pm_runtime_dont_use_autosuspend(&pdev->dev); in i2c_imx_probe()
1481 clk_disable_unprepare(i2c_imx->clk); in i2c_imx_probe()
1490 ret = pm_runtime_resume_and_get(&pdev->dev); in i2c_imx_remove()
1495 dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n"); in i2c_imx_remove()
1496 i2c_del_adapter(&i2c_imx->adapter); in i2c_imx_remove()
1498 if (i2c_imx->dma) in i2c_imx_remove()
1507 clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb); in i2c_imx_remove()
1511 clk_disable_unprepare(i2c_imx->clk); in i2c_imx_remove()
1513 pm_runtime_put_noidle(&pdev->dev); in i2c_imx_remove()
1514 pm_runtime_disable(&pdev->dev); in i2c_imx_remove()
1523 clk_disable(i2c_imx->clk); in i2c_imx_runtime_suspend()
1533 ret = clk_enable(i2c_imx->clk); in i2c_imx_runtime_resume()
1535 dev_err(dev, "can't enable I2C clock, ret=%d\n", ret); in i2c_imx_runtime_resume()
1571 MODULE_DESCRIPTION("I2C adapter driver for IMX I2C bus");