i2c/busses/i2c-cht-wc.c

59 	struct cht_wc_i2c_adap *adap = data;
62 	mutex_lock(&adap->adap_lock);
65 	ret = regmap_read(adap->regmap, CHT_WC_EXTCHGRIRQ, &reg);
67 		dev_err(&adap->adapter.dev, "Error reading extchgrirq reg\n");
68 		mutex_unlock(&adap->adap_lock);
72 	reg &= ~adap->irq_mask;
75 	ret = regmap_read(adap->regmap, CHT_WC_I2C_RDDATA, &adap->read_data);
77 		adap->io_error = true;
83 	ret = regmap_write(adap->regmap, CHT_WC_EXTCHGRIRQ, reg);
85 		dev_err(&adap->adapter.dev, "Error writing extchgrirq reg\n");
88 		adap->io_error |= !!(reg & CHT_WC_EXTCHGRIRQ_NACK_IRQ);
89 		adap->done = true;
92 	mutex_unlock(&adap->adap_lock);
95 		wake_up(&adap->wait);
104 		generic_handle_irq_safe(adap->client_irq);
109 static u32 cht_wc_i2c_adap_master_func(struct i2c_adapter *adap)
120 	struct cht_wc_i2c_adap *adap = i2c_get_adapdata(_adap);
123 	mutex_lock(&adap->adap_lock);
124 	adap->io_error = false;
125 	adap->done = false;
126 	mutex_unlock(&adap->adap_lock);
128 	ret = regmap_write(adap->regmap, CHT_WC_I2C_CLIENT_ADDR, addr);
133 		ret = regmap_write(adap->regmap, CHT_WC_I2C_WRDATA, data->byte);
138 	ret = regmap_write(adap->regmap, CHT_WC_I2C_REG_OFFSET, command);
142 	ret = regmap_write(adap->regmap, CHT_WC_I2C_CTRL,
148 	ret = wait_event_timeout(adap->wait, adap->done, msecs_to_jiffies(30));
154 		cht_wc_i2c_adap_thread_handler(0, adap);
155 		if (!adap->done)
160 	mutex_lock(&adap->adap_lock);
161 	if (adap->io_error)
164 		data->byte = adap->read_data;
165 	mutex_unlock(&adap->adap_lock);
223 	struct cht_wc_i2c_adap *adap = irq_data_get_irq_chip_data(data);
225 	mutex_lock(&adap->irqchip_lock);
230 	struct cht_wc_i2c_adap *adap = irq_data_get_irq_chip_data(data);
233 	if (adap->irq_mask != adap->old_irq_mask) {
234 		ret = regmap_write(adap->regmap, CHT_WC_EXTCHGRIRQ_MSK,
235 				   adap->irq_mask);
237 			adap->old_irq_mask = adap->irq_mask;
239 			dev_err(&adap->adapter.dev, "Error writing EXTCHGRIRQ_MSK\n");
242 	mutex_unlock(&adap->irqchip_lock);
247 	struct cht_wc_i2c_adap *adap = irq_data_get_irq_chip_data(data);
249 	adap->irq_mask &= ~CHT_WC_EXTCHGRIRQ_CLIENT_IRQ;
254 	struct cht_wc_i2c_adap *adap = irq_data_get_irq_chip_data(data);
256 	adap->irq_mask |= CHT_WC_EXTCHGRIRQ_CLIENT_IRQ;
430 	struct cht_wc_i2c_adap *adap;
437 	adap = devm_kzalloc(&pdev->dev, sizeof(*adap), GFP_KERNEL);
438 	if (!adap)
441 	init_waitqueue_head(&adap->wait);
442 	mutex_init(&adap->adap_lock);
443 	mutex_init(&adap->irqchip_lock);
444 	adap->irqchip = cht_wc_i2c_irq_chip;
445 	adap->regmap = pmic->regmap;
446 	adap->adapter.owner = THIS_MODULE;
447 	adap->adapter.class = I2C_CLASS_HWMON;
448 	adap->adapter.algo = &cht_wc_i2c_adap_algo;
449 	adap->adapter.lock_ops = &cht_wc_i2c_adap_lock_ops;
450 	strscpy(adap->adapter.name, "PMIC I2C Adapter",
451 		sizeof(adap->adapter.name));
452 	adap->adapter.dev.parent = &pdev->dev;
455 	adap->old_irq_mask = adap->irq_mask = ~CHT_WC_EXTCHGRIRQ_ADAP_IRQMASK;
457 	ret = regmap_read(adap->regmap, CHT_WC_I2C_RDDATA, &reg);
461 	ret = regmap_write(adap->regmap, CHT_WC_EXTCHGRIRQ, ~adap->irq_mask);
465 	ret = regmap_write(adap->regmap, CHT_WC_EXTCHGRIRQ_MSK, adap->irq_mask);
470 	adap->irq_domain = irq_domain_add_linear(NULL, 1, &irq_domain_simple_ops, NULL);
471 	if (!adap->irq_domain)
474 	adap->client_irq = irq_create_mapping(adap->irq_domain, 0);
475 	if (!adap->client_irq) {
480 	irq_set_chip_data(adap->client_irq, adap);
481 	irq_set_chip_and_handler(adap->client_irq, &adap->irqchip,
486 					IRQF_ONESHOT, "PMIC I2C Adapter", adap);
490 	i2c_set_adapdata(&adap->adapter, adap);
491 	ret = i2c_add_adapter(&adap->adapter);
514 		board_info->irq = adap->client_irq;
515 		adap->client = i2c_new_client_device(&adap->adapter, board_info);
516 		if (IS_ERR(adap->client)) {
517 			ret = PTR_ERR(adap->client);
522 	platform_set_drvdata(pdev, adap);
526 	i2c_del_adapter(&adap->adapter);
528 	irq_domain_remove(adap->irq_domain);
534 	struct cht_wc_i2c_adap *adap = platform_get_drvdata(pdev);
536 	i2c_unregister_device(adap->client);
537 	i2c_del_adapter(&adap->adapter);
538 	irq_domain_remove(adap->irq_domain);