Lines Matching refs:dev
130 struct device *dev; member
178 static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev) in i2c_davinci_calc_clk_dividers() argument
180 struct davinci_i2c_platform_data *pdata = dev->pdata; in i2c_davinci_calc_clk_dividers()
186 u32 input_clock = clk_get_rate(dev->clk); in i2c_davinci_calc_clk_dividers()
187 struct device_node *of_node = dev->dev->of_node; in i2c_davinci_calc_clk_dividers()
253 davinci_i2c_write_reg(dev, DAVINCI_I2C_PSC_REG, psc); in i2c_davinci_calc_clk_dividers()
254 davinci_i2c_write_reg(dev, DAVINCI_I2C_CLKH_REG, clkh); in i2c_davinci_calc_clk_dividers()
255 davinci_i2c_write_reg(dev, DAVINCI_I2C_CLKL_REG, clkl); in i2c_davinci_calc_clk_dividers()
257 dev_dbg(dev->dev, "input_clock = %d, CLK = %d\n", input_clock, clk); in i2c_davinci_calc_clk_dividers()
265 static int i2c_davinci_init(struct davinci_i2c_dev *dev) in i2c_davinci_init() argument
267 struct davinci_i2c_platform_data *pdata = dev->pdata; in i2c_davinci_init()
270 davinci_i2c_reset_ctrl(dev, 0); in i2c_davinci_init()
273 i2c_davinci_calc_clk_dividers(dev); in i2c_davinci_init()
278 davinci_i2c_write_reg(dev, DAVINCI_I2C_OAR_REG, DAVINCI_I2C_OWN_ADDRESS); in i2c_davinci_init()
280 dev_dbg(dev->dev, "PSC = %d\n", in i2c_davinci_init()
281 davinci_i2c_read_reg(dev, DAVINCI_I2C_PSC_REG)); in i2c_davinci_init()
282 dev_dbg(dev->dev, "CLKL = %d\n", in i2c_davinci_init()
283 davinci_i2c_read_reg(dev, DAVINCI_I2C_CLKL_REG)); in i2c_davinci_init()
284 dev_dbg(dev->dev, "CLKH = %d\n", in i2c_davinci_init()
285 davinci_i2c_read_reg(dev, DAVINCI_I2C_CLKH_REG)); in i2c_davinci_init()
286 dev_dbg(dev->dev, "bus_freq = %dkHz, bus_delay = %d\n", in i2c_davinci_init()
291 davinci_i2c_reset_ctrl(dev, 1); in i2c_davinci_init()
294 davinci_i2c_write_reg(dev, DAVINCI_I2C_IMR_REG, I2C_DAVINCI_INTR_ALL); in i2c_davinci_init()
305 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in davinci_i2c_prepare_recovery() local
308 davinci_i2c_write_reg(dev, DAVINCI_I2C_IMR_REG, 0); in davinci_i2c_prepare_recovery()
311 davinci_i2c_reset_ctrl(dev, 0); in davinci_i2c_prepare_recovery()
316 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in davinci_i2c_unprepare_recovery() local
318 i2c_davinci_init(dev); in davinci_i2c_unprepare_recovery()
329 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in davinci_i2c_set_scl() local
332 davinci_i2c_write_reg(dev, DAVINCI_I2C_DSET_REG, in davinci_i2c_set_scl()
335 davinci_i2c_write_reg(dev, DAVINCI_I2C_DCLR_REG, in davinci_i2c_set_scl()
341 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in davinci_i2c_get_scl() local
345 val = davinci_i2c_read_reg(dev, DAVINCI_I2C_DIN_REG); in davinci_i2c_get_scl()
351 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in davinci_i2c_get_sda() local
355 val = davinci_i2c_read_reg(dev, DAVINCI_I2C_DIN_REG); in davinci_i2c_get_sda()
361 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in davinci_i2c_scl_prepare_recovery() local
366 davinci_i2c_write_reg(dev, DAVINCI_I2C_DIR_REG, DAVINCI_I2C_DIR_PDIR0); in davinci_i2c_scl_prepare_recovery()
369 davinci_i2c_write_reg(dev, DAVINCI_I2C_FUNC_REG, in davinci_i2c_scl_prepare_recovery()
375 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in davinci_i2c_scl_unprepare_recovery() local
378 davinci_i2c_write_reg(dev, DAVINCI_I2C_FUNC_REG, 0); in davinci_i2c_scl_unprepare_recovery()
395 static int i2c_davinci_wait_bus_not_busy(struct davinci_i2c_dev *dev) in i2c_davinci_wait_bus_not_busy() argument
397 unsigned long timeout = jiffies + dev->adapter.timeout; in i2c_davinci_wait_bus_not_busy()
400 if (!(davinci_i2c_read_reg(dev, DAVINCI_I2C_STR_REG) & DAVINCI_I2C_STR_BB)) in i2c_davinci_wait_bus_not_busy()
405 dev_warn(dev->dev, "timeout waiting for bus ready\n"); in i2c_davinci_wait_bus_not_busy()
406 i2c_recover_bus(&dev->adapter); in i2c_davinci_wait_bus_not_busy()
412 if (davinci_i2c_read_reg(dev, DAVINCI_I2C_STR_REG) & DAVINCI_I2C_STR_BB) in i2c_davinci_wait_bus_not_busy()
425 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in i2c_davinci_xfer_msg() local
426 struct davinci_i2c_platform_data *pdata = dev->pdata; in i2c_davinci_xfer_msg()
432 dev_warn(dev->dev, "transfer to own address aborted\n"); in i2c_davinci_xfer_msg()
441 davinci_i2c_write_reg(dev, DAVINCI_I2C_SAR_REG, msg->addr); in i2c_davinci_xfer_msg()
443 dev->buf = msg->buf; in i2c_davinci_xfer_msg()
444 dev->buf_len = msg->len; in i2c_davinci_xfer_msg()
445 dev->stop = stop; in i2c_davinci_xfer_msg()
447 davinci_i2c_write_reg(dev, DAVINCI_I2C_CNT_REG, dev->buf_len); in i2c_davinci_xfer_msg()
449 reinit_completion(&dev->cmd_complete); in i2c_davinci_xfer_msg()
450 dev->cmd_err = 0; in i2c_davinci_xfer_msg()
464 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_IMR_REG); in i2c_davinci_xfer_msg()
469 davinci_i2c_write_reg(dev, DAVINCI_I2C_IMR_REG, w); in i2c_davinci_xfer_msg()
471 dev->terminate = 0; in i2c_davinci_xfer_msg()
478 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, flag); in i2c_davinci_xfer_msg()
487 if ((!(msg->flags & I2C_M_RD)) && dev->buf_len) { in i2c_davinci_xfer_msg()
488 davinci_i2c_write_reg(dev, DAVINCI_I2C_DXR_REG, *dev->buf++); in i2c_davinci_xfer_msg()
489 dev->buf_len--; in i2c_davinci_xfer_msg()
496 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, flag); in i2c_davinci_xfer_msg()
498 time_left = wait_for_completion_timeout(&dev->cmd_complete, in i2c_davinci_xfer_msg()
499 dev->adapter.timeout); in i2c_davinci_xfer_msg()
501 dev_err(dev->dev, "controller timed out\n"); in i2c_davinci_xfer_msg()
503 dev->buf_len = 0; in i2c_davinci_xfer_msg()
506 if (dev->buf_len) { in i2c_davinci_xfer_msg()
510 dev_err(dev->dev, "abnormal termination buf_len=%zu\n", in i2c_davinci_xfer_msg()
511 dev->buf_len); in i2c_davinci_xfer_msg()
512 dev->terminate = 1; in i2c_davinci_xfer_msg()
514 dev->buf_len = 0; in i2c_davinci_xfer_msg()
519 if (likely(!dev->cmd_err)) in i2c_davinci_xfer_msg()
523 if (dev->cmd_err & DAVINCI_I2C_STR_AL) { in i2c_davinci_xfer_msg()
524 i2c_davinci_init(dev); in i2c_davinci_xfer_msg()
528 if (dev->cmd_err & DAVINCI_I2C_STR_NACK) { in i2c_davinci_xfer_msg()
531 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG); in i2c_davinci_xfer_msg()
533 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w); in i2c_davinci_xfer_msg()
545 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap); in i2c_davinci_xfer() local
549 dev_dbg(dev->dev, "%s: msgs: %d\n", __func__, num); in i2c_davinci_xfer()
551 ret = pm_runtime_get_sync(dev->dev); in i2c_davinci_xfer()
553 dev_err(dev->dev, "Failed to runtime_get device: %d\n", ret); in i2c_davinci_xfer()
554 pm_runtime_put_noidle(dev->dev); in i2c_davinci_xfer()
558 ret = i2c_davinci_wait_bus_not_busy(dev); in i2c_davinci_xfer()
560 dev_warn(dev->dev, "timeout waiting for bus ready\n"); in i2c_davinci_xfer()
566 dev_dbg(dev->dev, "%s [%d/%d] ret: %d\n", __func__, i + 1, num, in i2c_davinci_xfer()
575 pm_runtime_mark_last_busy(dev->dev); in i2c_davinci_xfer()
576 pm_runtime_put_autosuspend(dev->dev); in i2c_davinci_xfer()
586 static void terminate_read(struct davinci_i2c_dev *dev) in terminate_read() argument
588 u16 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG); in terminate_read()
590 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w); in terminate_read()
593 davinci_i2c_read_reg(dev, DAVINCI_I2C_DRR_REG); in terminate_read()
594 if (!dev->terminate) in terminate_read()
595 dev_err(dev->dev, "RDR IRQ while no data requested\n"); in terminate_read()
597 static void terminate_write(struct davinci_i2c_dev *dev) in terminate_write() argument
599 u16 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG); in terminate_write()
601 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w); in terminate_write()
603 if (!dev->terminate) in terminate_write()
604 dev_dbg(dev->dev, "TDR IRQ while no data to send\n"); in terminate_write()
613 struct davinci_i2c_dev *dev = dev_id; in i2c_davinci_isr() local
618 if (pm_runtime_suspended(dev->dev)) in i2c_davinci_isr()
621 while ((stat = davinci_i2c_read_reg(dev, DAVINCI_I2C_IVR_REG))) { in i2c_davinci_isr()
622 dev_dbg(dev->dev, "%s: stat=0x%x\n", __func__, stat); in i2c_davinci_isr()
624 dev_warn(dev->dev, "Too much work in one IRQ\n"); in i2c_davinci_isr()
631 dev->cmd_err |= DAVINCI_I2C_STR_AL; in i2c_davinci_isr()
632 dev->buf_len = 0; in i2c_davinci_isr()
633 complete(&dev->cmd_complete); in i2c_davinci_isr()
637 dev->cmd_err |= DAVINCI_I2C_STR_NACK; in i2c_davinci_isr()
638 dev->buf_len = 0; in i2c_davinci_isr()
639 complete(&dev->cmd_complete); in i2c_davinci_isr()
643 davinci_i2c_write_reg(dev, in i2c_davinci_isr()
645 if (((dev->buf_len == 0) && (dev->stop != 0)) || in i2c_davinci_isr()
646 (dev->cmd_err & DAVINCI_I2C_STR_NACK)) { in i2c_davinci_isr()
647 w = davinci_i2c_read_reg(dev, in i2c_davinci_isr()
650 davinci_i2c_write_reg(dev, in i2c_davinci_isr()
653 complete(&dev->cmd_complete); in i2c_davinci_isr()
657 if (dev->buf_len) { in i2c_davinci_isr()
658 *dev->buf++ = in i2c_davinci_isr()
659 davinci_i2c_read_reg(dev, in i2c_davinci_isr()
661 dev->buf_len--; in i2c_davinci_isr()
662 if (dev->buf_len) in i2c_davinci_isr()
665 davinci_i2c_write_reg(dev, in i2c_davinci_isr()
670 terminate_read(dev); in i2c_davinci_isr()
675 if (dev->buf_len) { in i2c_davinci_isr()
676 davinci_i2c_write_reg(dev, DAVINCI_I2C_DXR_REG, in i2c_davinci_isr()
677 *dev->buf++); in i2c_davinci_isr()
678 dev->buf_len--; in i2c_davinci_isr()
679 if (dev->buf_len) in i2c_davinci_isr()
682 w = davinci_i2c_read_reg(dev, in i2c_davinci_isr()
685 davinci_i2c_write_reg(dev, in i2c_davinci_isr()
690 terminate_write(dev); in i2c_davinci_isr()
695 davinci_i2c_write_reg(dev, in i2c_davinci_isr()
697 complete(&dev->cmd_complete); in i2c_davinci_isr()
701 dev_dbg(dev->dev, "Address as slave interrupt\n"); in i2c_davinci_isr()
705 dev_warn(dev->dev, "Unrecognized irq stat %d\n", stat); in i2c_davinci_isr()
717 struct davinci_i2c_dev *dev; in i2c_davinci_cpufreq_transition() local
719 dev = container_of(nb, struct davinci_i2c_dev, freq_transition); in i2c_davinci_cpufreq_transition()
721 i2c_lock_bus(&dev->adapter, I2C_LOCK_ROOT_ADAPTER); in i2c_davinci_cpufreq_transition()
723 davinci_i2c_reset_ctrl(dev, 0); in i2c_davinci_cpufreq_transition()
725 i2c_davinci_calc_clk_dividers(dev); in i2c_davinci_cpufreq_transition()
726 davinci_i2c_reset_ctrl(dev, 1); in i2c_davinci_cpufreq_transition()
728 i2c_unlock_bus(&dev->adapter, I2C_LOCK_ROOT_ADAPTER); in i2c_davinci_cpufreq_transition()
733 static inline int i2c_davinci_cpufreq_register(struct davinci_i2c_dev *dev) in i2c_davinci_cpufreq_register() argument
735 dev->freq_transition.notifier_call = i2c_davinci_cpufreq_transition; in i2c_davinci_cpufreq_register()
737 return cpufreq_register_notifier(&dev->freq_transition, in i2c_davinci_cpufreq_register()
741 static inline void i2c_davinci_cpufreq_deregister(struct davinci_i2c_dev *dev) in i2c_davinci_cpufreq_deregister() argument
743 cpufreq_unregister_notifier(&dev->freq_transition, in i2c_davinci_cpufreq_deregister()
747 static inline int i2c_davinci_cpufreq_register(struct davinci_i2c_dev *dev) in i2c_davinci_cpufreq_register() argument
752 static inline void i2c_davinci_cpufreq_deregister(struct davinci_i2c_dev *dev) in i2c_davinci_cpufreq_deregister() argument
771 struct davinci_i2c_dev *dev; in davinci_i2c_probe() local
782 dev_err(&pdev->dev, in davinci_i2c_probe()
787 dev = devm_kzalloc(&pdev->dev, sizeof(struct davinci_i2c_dev), in davinci_i2c_probe()
789 if (!dev) { in davinci_i2c_probe()
790 dev_err(&pdev->dev, "Memory allocation failed\n"); in davinci_i2c_probe()
794 init_completion(&dev->cmd_complete); in davinci_i2c_probe()
796 dev->dev = &pdev->dev; in davinci_i2c_probe()
797 dev->irq = irq; in davinci_i2c_probe()
798 dev->pdata = dev_get_platdata(&pdev->dev); in davinci_i2c_probe()
799 platform_set_drvdata(pdev, dev); in davinci_i2c_probe()
801 if (!dev->pdata && pdev->dev.of_node) { in davinci_i2c_probe()
804 dev->pdata = devm_kzalloc(&pdev->dev, in davinci_i2c_probe()
806 if (!dev->pdata) in davinci_i2c_probe()
809 memcpy(dev->pdata, &davinci_i2c_platform_data_default, in davinci_i2c_probe()
811 if (!of_property_read_u32(pdev->dev.of_node, "clock-frequency", in davinci_i2c_probe()
813 dev->pdata->bus_freq = prop / 1000; in davinci_i2c_probe()
815 dev->pdata->has_pfunc = in davinci_i2c_probe()
816 of_property_read_bool(pdev->dev.of_node, in davinci_i2c_probe()
818 } else if (!dev->pdata) { in davinci_i2c_probe()
819 dev->pdata = &davinci_i2c_platform_data_default; in davinci_i2c_probe()
822 dev->clk = devm_clk_get(&pdev->dev, NULL); in davinci_i2c_probe()
823 if (IS_ERR(dev->clk)) in davinci_i2c_probe()
824 return PTR_ERR(dev->clk); in davinci_i2c_probe()
827 dev->base = devm_ioremap_resource(&pdev->dev, mem); in davinci_i2c_probe()
828 if (IS_ERR(dev->base)) { in davinci_i2c_probe()
829 return PTR_ERR(dev->base); in davinci_i2c_probe()
832 pm_runtime_set_autosuspend_delay(dev->dev, in davinci_i2c_probe()
834 pm_runtime_use_autosuspend(dev->dev); in davinci_i2c_probe()
836 pm_runtime_enable(dev->dev); in davinci_i2c_probe()
838 r = pm_runtime_get_sync(dev->dev); in davinci_i2c_probe()
840 dev_err(dev->dev, "failed to runtime_get device: %d\n", r); in davinci_i2c_probe()
841 pm_runtime_put_noidle(dev->dev); in davinci_i2c_probe()
845 i2c_davinci_init(dev); in davinci_i2c_probe()
847 r = devm_request_irq(&pdev->dev, dev->irq, i2c_davinci_isr, 0, in davinci_i2c_probe()
848 pdev->name, dev); in davinci_i2c_probe()
850 dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq); in davinci_i2c_probe()
854 r = i2c_davinci_cpufreq_register(dev); in davinci_i2c_probe()
856 dev_err(&pdev->dev, "failed to register cpufreq\n"); in davinci_i2c_probe()
860 adap = &dev->adapter; in davinci_i2c_probe()
861 i2c_set_adapdata(adap, dev); in davinci_i2c_probe()
866 adap->dev.parent = &pdev->dev; in davinci_i2c_probe()
868 adap->dev.of_node = pdev->dev.of_node; in davinci_i2c_probe()
870 if (dev->pdata->has_pfunc) in davinci_i2c_probe()
872 else if (dev->pdata->gpio_recovery) { in davinci_i2c_probe()
875 rinfo->scl_gpiod = devm_gpiod_get(&pdev->dev, "scl", in davinci_i2c_probe()
881 rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN); in davinci_i2c_probe()
893 pm_runtime_mark_last_busy(dev->dev); in davinci_i2c_probe()
894 pm_runtime_put_autosuspend(dev->dev); in davinci_i2c_probe()
899 pm_runtime_dont_use_autosuspend(dev->dev); in davinci_i2c_probe()
900 pm_runtime_put_sync(dev->dev); in davinci_i2c_probe()
901 pm_runtime_disable(dev->dev); in davinci_i2c_probe()
908 struct davinci_i2c_dev *dev = platform_get_drvdata(pdev); in davinci_i2c_remove() local
911 i2c_davinci_cpufreq_deregister(dev); in davinci_i2c_remove()
913 i2c_del_adapter(&dev->adapter); in davinci_i2c_remove()
915 ret = pm_runtime_get_sync(&pdev->dev); in davinci_i2c_remove()
917 pm_runtime_put_noidle(&pdev->dev); in davinci_i2c_remove()
921 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, 0); in davinci_i2c_remove()
923 pm_runtime_dont_use_autosuspend(dev->dev); in davinci_i2c_remove()
924 pm_runtime_put_sync(dev->dev); in davinci_i2c_remove()
925 pm_runtime_disable(dev->dev); in davinci_i2c_remove()
931 static int davinci_i2c_suspend(struct device *dev) in davinci_i2c_suspend() argument
933 struct davinci_i2c_dev *i2c_dev = dev_get_drvdata(dev); in davinci_i2c_suspend()
941 static int davinci_i2c_resume(struct device *dev) in davinci_i2c_resume() argument
943 struct davinci_i2c_dev *i2c_dev = dev_get_drvdata(dev); in davinci_i2c_resume()