Lines Matching +full:autosuspend +full:- +full:period
4 * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
72 /* timeout (ms) for pm runtime autosuspend */
95 writel(count, i2c_dev->base + I2C_COUNT); in sprd_i2c_set_count()
100 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_send_stop()
103 writel(tmp & ~STP_EN, i2c_dev->base + I2C_CTL); in sprd_i2c_send_stop()
105 writel(tmp | STP_EN, i2c_dev->base + I2C_CTL); in sprd_i2c_send_stop()
110 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_clear_start()
112 writel(tmp & ~I2C_START, i2c_dev->base + I2C_CTL); in sprd_i2c_clear_start()
117 u32 tmp = readl(i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_ack()
119 writel(tmp & ~I2C_RX_ACK, i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_ack()
124 u32 tmp = readl(i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_irq()
126 writel(tmp & ~I2C_INT, i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_irq()
131 writel(I2C_RST, i2c_dev->base + ADDR_RST); in sprd_i2c_reset_fifo()
136 writel(m->addr << 1, i2c_dev->base + I2C_ADDR_CFG); in sprd_i2c_set_devaddr()
144 writeb(buf[i], i2c_dev->base + I2C_TX); in sprd_i2c_write_bytes()
152 buf[i] = readb(i2c_dev->base + I2C_RX); in sprd_i2c_read_bytes()
157 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_full_thld()
161 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_full_thld()
166 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_empty_thld()
170 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_empty_thld()
175 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_full_int()
182 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_full_int()
187 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_empty_int()
194 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_empty_int()
199 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_opt_start()
201 writel(tmp | I2C_START, i2c_dev->base + I2C_CTL); in sprd_i2c_opt_start()
206 u32 cmd = readl(i2c_dev->base + I2C_CTL) & ~I2C_MODE; in sprd_i2c_opt_mode()
208 writel(cmd | rw << 3, i2c_dev->base + I2C_CTL); in sprd_i2c_opt_mode()
213 u32 i2c_count = i2c_dev->count; in sprd_i2c_data_transfer()
215 struct i2c_msg *msg = i2c_dev->msg; in sprd_i2c_data_transfer()
217 if (msg->flags & I2C_M_RD) { in sprd_i2c_data_transfer()
218 sprd_i2c_read_bytes(i2c_dev, i2c_dev->buf, I2C_FIFO_FULL_THLD); in sprd_i2c_data_transfer()
219 i2c_dev->count -= I2C_FIFO_FULL_THLD; in sprd_i2c_data_transfer()
220 i2c_dev->buf += I2C_FIFO_FULL_THLD; in sprd_i2c_data_transfer()
227 if (i2c_dev->count >= I2C_FIFO_FULL_THLD) in sprd_i2c_data_transfer()
230 sprd_i2c_write_bytes(i2c_dev, i2c_dev->buf, need_tran); in sprd_i2c_data_transfer()
231 i2c_dev->buf += need_tran; in sprd_i2c_data_transfer()
232 i2c_dev->count -= need_tran; in sprd_i2c_data_transfer()
247 struct sprd_i2c *i2c_dev = i2c_adap->algo_data; in sprd_i2c_handle_msg()
250 i2c_dev->msg = msg; in sprd_i2c_handle_msg()
251 i2c_dev->buf = msg->buf; in sprd_i2c_handle_msg()
252 i2c_dev->count = msg->len; in sprd_i2c_handle_msg()
254 reinit_completion(&i2c_dev->complete); in sprd_i2c_handle_msg()
257 sprd_i2c_set_count(i2c_dev, msg->len); in sprd_i2c_handle_msg()
259 if (msg->flags & I2C_M_RD) { in sprd_i2c_handle_msg()
271 if (msg->flags & I2C_M_RD) in sprd_i2c_handle_msg()
278 time_left = wait_for_completion_timeout(&i2c_dev->complete, in sprd_i2c_handle_msg()
281 return -ETIMEDOUT; in sprd_i2c_handle_msg()
283 return i2c_dev->err; in sprd_i2c_handle_msg()
289 struct sprd_i2c *i2c_dev = i2c_adap->algo_data; in sprd_i2c_master_xfer()
292 ret = pm_runtime_resume_and_get(i2c_dev->dev); in sprd_i2c_master_xfer()
296 for (im = 0; im < num - 1; im++) { in sprd_i2c_master_xfer()
305 pm_runtime_mark_last_busy(i2c_dev->dev); in sprd_i2c_master_xfer()
306 pm_runtime_put_autosuspend(i2c_dev->dev); in sprd_i2c_master_xfer()
323 u32 apb_clk = i2c_dev->src_clk; in sprd_i2c_set_clk()
326 * prescale = freq_i2c / (4 * freq_scl) - 1; in sprd_i2c_set_clk()
328 u32 i2c_dvd = apb_clk / (4 * freq) - 1; in sprd_i2c_set_clk()
330 * From I2C databook, the high period of SCL clock is recommended as in sprd_i2c_set_clk()
331 * 40% (2/5), and the low period of SCL clock is recommended as 60% in sprd_i2c_set_clk()
341 writel(div0, i2c_dev->base + ADDR_DVD0); in sprd_i2c_set_clk()
342 writel(div1, i2c_dev->base + ADDR_DVD1); in sprd_i2c_set_clk()
346 writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); in sprd_i2c_set_clk()
348 writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD); in sprd_i2c_set_clk()
355 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_enable()
360 sprd_i2c_set_clk(i2c_dev, i2c_dev->bus_freq); in sprd_i2c_enable()
364 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_enable()
365 writel(tmp | I2C_EN | I2C_INT_EN, i2c_dev->base + I2C_CTL); in sprd_i2c_enable()
371 struct i2c_msg *msg = i2c_dev->msg; in sprd_i2c_isr_thread()
372 bool ack = !(readl(i2c_dev->base + I2C_STATUS) & I2C_RX_ACK); in sprd_i2c_isr_thread()
375 if (msg->flags & I2C_M_RD) in sprd_i2c_isr_thread()
376 i2c_tran = i2c_dev->count >= I2C_FIFO_FULL_THLD; in sprd_i2c_isr_thread()
378 i2c_tran = i2c_dev->count; in sprd_i2c_isr_thread()
393 i2c_dev->err = 0; in sprd_i2c_isr_thread()
397 * return -EIO to notify users. in sprd_i2c_isr_thread()
400 i2c_dev->err = -EIO; in sprd_i2c_isr_thread()
401 else if (msg->flags & I2C_M_RD && i2c_dev->count) in sprd_i2c_isr_thread()
402 sprd_i2c_read_bytes(i2c_dev, i2c_dev->buf, i2c_dev->count); in sprd_i2c_isr_thread()
407 complete(&i2c_dev->complete); in sprd_i2c_isr_thread()
415 struct i2c_msg *msg = i2c_dev->msg; in sprd_i2c_isr()
416 bool ack = !(readl(i2c_dev->base + I2C_STATUS) & I2C_RX_ACK); in sprd_i2c_isr()
419 if (msg->flags & I2C_M_RD) in sprd_i2c_isr()
420 i2c_tran = i2c_dev->count >= I2C_FIFO_FULL_THLD; in sprd_i2c_isr()
422 i2c_tran = i2c_dev->count; in sprd_i2c_isr()
450 clk_i2c = devm_clk_get(i2c_dev->dev, "i2c"); in sprd_i2c_clk_init()
452 dev_warn(i2c_dev->dev, "i2c%d can't get the i2c clock\n", in sprd_i2c_clk_init()
453 i2c_dev->adap.nr); in sprd_i2c_clk_init()
457 clk_parent = devm_clk_get(i2c_dev->dev, "source"); in sprd_i2c_clk_init()
459 dev_warn(i2c_dev->dev, "i2c%d can't get the source clock\n", in sprd_i2c_clk_init()
460 i2c_dev->adap.nr); in sprd_i2c_clk_init()
465 i2c_dev->src_clk = clk_get_rate(clk_i2c); in sprd_i2c_clk_init()
467 i2c_dev->src_clk = 26000000; in sprd_i2c_clk_init()
469 dev_dbg(i2c_dev->dev, "i2c%d set source clock is %d\n", in sprd_i2c_clk_init()
470 i2c_dev->adap.nr, i2c_dev->src_clk); in sprd_i2c_clk_init()
472 i2c_dev->clk = devm_clk_get(i2c_dev->dev, "enable"); in sprd_i2c_clk_init()
473 if (IS_ERR(i2c_dev->clk)) { in sprd_i2c_clk_init()
474 dev_err(i2c_dev->dev, "i2c%d can't get the enable clock\n", in sprd_i2c_clk_init()
475 i2c_dev->adap.nr); in sprd_i2c_clk_init()
476 return PTR_ERR(i2c_dev->clk); in sprd_i2c_clk_init()
484 struct device *dev = &pdev->dev; in sprd_i2c_probe()
489 pdev->id = of_alias_get_id(dev->of_node, "i2c"); in sprd_i2c_probe()
493 return -ENOMEM; in sprd_i2c_probe()
495 i2c_dev->base = devm_platform_ioremap_resource(pdev, 0); in sprd_i2c_probe()
496 if (IS_ERR(i2c_dev->base)) in sprd_i2c_probe()
497 return PTR_ERR(i2c_dev->base); in sprd_i2c_probe()
499 i2c_dev->irq = platform_get_irq(pdev, 0); in sprd_i2c_probe()
500 if (i2c_dev->irq < 0) in sprd_i2c_probe()
501 return i2c_dev->irq; in sprd_i2c_probe()
503 i2c_set_adapdata(&i2c_dev->adap, i2c_dev); in sprd_i2c_probe()
504 init_completion(&i2c_dev->complete); in sprd_i2c_probe()
505 snprintf(i2c_dev->adap.name, sizeof(i2c_dev->adap.name), in sprd_i2c_probe()
506 "%s", "sprd-i2c"); in sprd_i2c_probe()
508 i2c_dev->bus_freq = I2C_MAX_STANDARD_MODE_FREQ; in sprd_i2c_probe()
509 i2c_dev->adap.owner = THIS_MODULE; in sprd_i2c_probe()
510 i2c_dev->dev = dev; in sprd_i2c_probe()
511 i2c_dev->adap.retries = 3; in sprd_i2c_probe()
512 i2c_dev->adap.algo = &sprd_i2c_algo; in sprd_i2c_probe()
513 i2c_dev->adap.algo_data = i2c_dev; in sprd_i2c_probe()
514 i2c_dev->adap.dev.parent = dev; in sprd_i2c_probe()
515 i2c_dev->adap.nr = pdev->id; in sprd_i2c_probe()
516 i2c_dev->adap.dev.of_node = dev->of_node; in sprd_i2c_probe()
518 if (!of_property_read_u32(dev->of_node, "clock-frequency", &prop)) in sprd_i2c_probe()
519 i2c_dev->bus_freq = prop; in sprd_i2c_probe()
522 if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ && in sprd_i2c_probe()
523 i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ) in sprd_i2c_probe()
524 return -EINVAL; in sprd_i2c_probe()
532 ret = clk_prepare_enable(i2c_dev->clk); in sprd_i2c_probe()
538 pm_runtime_set_autosuspend_delay(i2c_dev->dev, SPRD_I2C_PM_TIMEOUT); in sprd_i2c_probe()
539 pm_runtime_use_autosuspend(i2c_dev->dev); in sprd_i2c_probe()
540 pm_runtime_set_active(i2c_dev->dev); in sprd_i2c_probe()
541 pm_runtime_enable(i2c_dev->dev); in sprd_i2c_probe()
543 ret = pm_runtime_get_sync(i2c_dev->dev); in sprd_i2c_probe()
547 ret = devm_request_threaded_irq(dev, i2c_dev->irq, in sprd_i2c_probe()
550 pdev->name, i2c_dev); in sprd_i2c_probe()
552 dev_err(&pdev->dev, "failed to request irq %d\n", i2c_dev->irq); in sprd_i2c_probe()
556 ret = i2c_add_numbered_adapter(&i2c_dev->adap); in sprd_i2c_probe()
558 dev_err(&pdev->dev, "add adapter failed\n"); in sprd_i2c_probe()
562 pm_runtime_mark_last_busy(i2c_dev->dev); in sprd_i2c_probe()
563 pm_runtime_put_autosuspend(i2c_dev->dev); in sprd_i2c_probe()
567 pm_runtime_put_noidle(i2c_dev->dev); in sprd_i2c_probe()
568 pm_runtime_disable(i2c_dev->dev); in sprd_i2c_probe()
569 clk_disable_unprepare(i2c_dev->clk); in sprd_i2c_probe()
578 ret = pm_runtime_get_sync(i2c_dev->dev); in sprd_i2c_remove()
580 dev_err(&pdev->dev, "Failed to resume device (%pe)\n", ERR_PTR(ret)); in sprd_i2c_remove()
582 i2c_del_adapter(&i2c_dev->adap); in sprd_i2c_remove()
585 clk_disable_unprepare(i2c_dev->clk); in sprd_i2c_remove()
587 pm_runtime_put_noidle(i2c_dev->dev); in sprd_i2c_remove()
588 pm_runtime_disable(i2c_dev->dev); in sprd_i2c_remove()
597 i2c_mark_adapter_suspended(&i2c_dev->adap); in sprd_i2c_suspend_noirq()
605 i2c_mark_adapter_resumed(&i2c_dev->adap); in sprd_i2c_resume_noirq()
613 clk_disable_unprepare(i2c_dev->clk); in sprd_i2c_runtime_suspend()
623 ret = clk_prepare_enable(i2c_dev->clk); in sprd_i2c_runtime_resume()
641 { .compatible = "sprd,sc9860-i2c", },
650 .name = "sprd-i2c",