28 unsigned at91_twi_read(struct at91_twi_dev *dev, unsigned reg)  in at91_twi_read()  argument
30 	return readl_relaxed(dev->base + reg);  in at91_twi_read()
33 void at91_twi_write(struct at91_twi_dev *dev, unsigned reg, unsigned val)  in at91_twi_write()  argument
35 	writel_relaxed(val, dev->base + reg);  in at91_twi_write()
38 void at91_disable_twi_interrupts(struct at91_twi_dev *dev)  in at91_disable_twi_interrupts()  argument
40 	at91_twi_write(dev, AT91_TWI_IDR, AT91_TWI_INT_MASK);  in at91_disable_twi_interrupts()
43 void at91_twi_irq_save(struct at91_twi_dev *dev)  in at91_twi_irq_save()  argument
45 	dev->imr = at91_twi_read(dev, AT91_TWI_IMR) & AT91_TWI_INT_MASK;  in at91_twi_irq_save()
46 	at91_disable_twi_interrupts(dev);  in at91_twi_irq_save()
49 void at91_twi_irq_restore(struct at91_twi_dev *dev)  in at91_twi_irq_restore()  argument
51 	at91_twi_write(dev, AT91_TWI_IER, dev->imr);  in at91_twi_irq_restore()
54 void at91_init_twi_bus(struct at91_twi_dev *dev)  in at91_init_twi_bus()  argument
56 	at91_disable_twi_interrupts(dev);  in at91_init_twi_bus()
57 	at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_SWRST);  in at91_init_twi_bus()
58 	if (dev->slave_detected)  in at91_init_twi_bus()
59 		at91_init_twi_bus_slave(dev);  in at91_init_twi_bus()
61 		at91_init_twi_bus_master(dev);  in at91_init_twi_bus()
186 	if (pdev->dev.of_node) {  in at91_twi_get_driver_data()
188 		match = of_match_node(atmel_twi_dt_ids, pdev->dev.of_node);  in at91_twi_get_driver_data()
198 	struct at91_twi_dev *dev;  in at91_twi_probe()  local
203 	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);  in at91_twi_probe()
204 	if (!dev)  in at91_twi_probe()
207 	dev->dev = &pdev->dev;  in at91_twi_probe()
209 	dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);  in at91_twi_probe()
210 	if (IS_ERR(dev->base))  in at91_twi_probe()
211 		return PTR_ERR(dev->base);  in at91_twi_probe()
214 	dev->pdata = at91_twi_get_driver_data(pdev);  in at91_twi_probe()
215 	if (!dev->pdata)  in at91_twi_probe()
218 	dev->irq = platform_get_irq(pdev, 0);  in at91_twi_probe()
219 	if (dev->irq < 0)  in at91_twi_probe()
220 		return dev->irq;  in at91_twi_probe()
222 	platform_set_drvdata(pdev, dev);  in at91_twi_probe()
224 	dev->clk = devm_clk_get(dev->dev, NULL);  in at91_twi_probe()
225 	if (IS_ERR(dev->clk))  in at91_twi_probe()
226 		return dev_err_probe(dev->dev, PTR_ERR(dev->clk), "no clock defined\n");  in at91_twi_probe()
228 	clk_prepare_enable(dev->clk);  in at91_twi_probe()
230 	snprintf(dev->adapter.name, sizeof(dev->adapter.name), "AT91");  in at91_twi_probe()
231 	i2c_set_adapdata(&dev->adapter, dev);  in at91_twi_probe()
232 	dev->adapter.owner = THIS_MODULE;  in at91_twi_probe()
233 	dev->adapter.class = I2C_CLASS_DEPRECATED;  in at91_twi_probe()
234 	dev->adapter.dev.parent = dev->dev;  in at91_twi_probe()
235 	dev->adapter.nr = pdev->id;  in at91_twi_probe()
236 	dev->adapter.timeout = AT91_I2C_TIMEOUT;  in at91_twi_probe()
237 	dev->adapter.dev.of_node = pdev->dev.of_node;  in at91_twi_probe()
239 	dev->slave_detected = i2c_detect_slave_mode(&pdev->dev);  in at91_twi_probe()
241 	if (dev->slave_detected)  in at91_twi_probe()
242 		rc = at91_twi_probe_slave(pdev, phy_addr, dev);  in at91_twi_probe()
244 		rc = at91_twi_probe_master(pdev, phy_addr, dev);  in at91_twi_probe()
248 	at91_init_twi_bus(dev);  in at91_twi_probe()
250 	pm_runtime_set_autosuspend_delay(dev->dev, AUTOSUSPEND_TIMEOUT);  in at91_twi_probe()
251 	pm_runtime_use_autosuspend(dev->dev);  in at91_twi_probe()
252 	pm_runtime_set_active(dev->dev);  in at91_twi_probe()
253 	pm_runtime_enable(dev->dev);  in at91_twi_probe()
255 	rc = i2c_add_numbered_adapter(&dev->adapter);  in at91_twi_probe()
257 		clk_disable_unprepare(dev->clk);  in at91_twi_probe()
259 		pm_runtime_disable(dev->dev);  in at91_twi_probe()
260 		pm_runtime_set_suspended(dev->dev);  in at91_twi_probe()
265 	dev_info(dev->dev, "AT91 i2c bus driver (hw version: %#x).\n",  in at91_twi_probe()
266 		 at91_twi_read(dev, AT91_TWI_VER));  in at91_twi_probe()
272 	struct at91_twi_dev *dev = platform_get_drvdata(pdev);  in at91_twi_remove()  local
274 	i2c_del_adapter(&dev->adapter);  in at91_twi_remove()
275 	clk_disable_unprepare(dev->clk);  in at91_twi_remove()
277 	pm_runtime_disable(dev->dev);  in at91_twi_remove()
278 	pm_runtime_set_suspended(dev->dev);  in at91_twi_remove()
281 static int __maybe_unused at91_twi_runtime_suspend(struct device *dev)  in at91_twi_runtime_suspend()  argument
283 	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);  in at91_twi_runtime_suspend()
287 	pinctrl_pm_select_sleep_state(dev);  in at91_twi_runtime_suspend()
292 static int __maybe_unused at91_twi_runtime_resume(struct device *dev)  in at91_twi_runtime_resume()  argument
294 	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);  in at91_twi_runtime_resume()
296 	pinctrl_pm_select_default_state(dev);  in at91_twi_runtime_resume()
301 static int __maybe_unused at91_twi_suspend_noirq(struct device *dev)  in at91_twi_suspend_noirq()  argument
303 	if (!pm_runtime_status_suspended(dev))  in at91_twi_suspend_noirq()
304 		at91_twi_runtime_suspend(dev);  in at91_twi_suspend_noirq()
309 static int __maybe_unused at91_twi_resume_noirq(struct device *dev)  in at91_twi_resume_noirq()  argument
311 	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);  in at91_twi_resume_noirq()
314 	if (!pm_runtime_status_suspended(dev)) {  in at91_twi_resume_noirq()
315 		ret = at91_twi_runtime_resume(dev);  in at91_twi_resume_noirq()
320 	pm_runtime_mark_last_busy(dev);  in at91_twi_resume_noirq()
321 	pm_request_autosuspend(dev);  in at91_twi_resume_noirq()