1 // SPDX-License-Identifier: GPL-2.0-only
5  * SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES.
96 	ret = i2c_smbus_read_byte_data(info->client, reg);  in nvvrs_update_bits()
104 	return i2c_smbus_write_byte_data(info->client, reg, val);  in nvvrs_update_bits()
147 	struct i2c_client *client = info->client;  in nvvrs_rtc_disable_alarm()
184 	 * Multi-byte transfers are not supported with PEC enabled  in nvvrs_rtc_read_time()
187 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_T3);  in nvvrs_rtc_read_time()
194 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_T2);  in nvvrs_rtc_read_time()
201 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_T1);  in nvvrs_rtc_read_time()
208 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_T0);  in nvvrs_rtc_read_time()
233 	ret = i2c_smbus_write_byte_data(info->client, NVVRS_REG_RTC_T3, time[3]);  in nvvrs_rtc_set_time()
237 	ret = i2c_smbus_write_byte_data(info->client, NVVRS_REG_RTC_T2, time[2]);  in nvvrs_rtc_set_time()
241 	ret = i2c_smbus_write_byte_data(info->client, NVVRS_REG_RTC_T1, time[1]);  in nvvrs_rtc_set_time()
245 	ret = i2c_smbus_write_byte_data(info->client, NVVRS_REG_RTC_T0, time[0]);  in nvvrs_rtc_set_time()
257 	/* Multi-byte transfers are not supported with PEC enabled */  in nvvrs_rtc_read_alarm()
258 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_A3);  in nvvrs_rtc_read_alarm()
265 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_A2);  in nvvrs_rtc_read_alarm()
272 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_A1);  in nvvrs_rtc_read_alarm()
279 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_RTC_A0);  in nvvrs_rtc_read_alarm()
287 		alrm->enabled = 0;  in nvvrs_rtc_read_alarm()
289 		alrm->enabled = 1;  in nvvrs_rtc_read_alarm()
291 	rtc_time64_to_tm(alarm_val, &alrm->time);  in nvvrs_rtc_read_alarm()
303 	if (!alrm->enabled) {  in nvvrs_rtc_set_alarm()
313 	secs = rtc_tm_to_time64(&alrm->time);  in nvvrs_rtc_set_alarm()
319 	ret = nvvrs_rtc_write_alarm(info->client, time);  in nvvrs_rtc_set_alarm()
330 		ret = i2c_smbus_read_byte_data(info->client,  in nvvrs_pseq_irq_clear()
333 			dev_err(info->dev, "Failed to read INT_SRC%d : %d\n",  in nvvrs_pseq_irq_clear()
338 		ret = i2c_smbus_write_byte_data(info->client,  in nvvrs_pseq_irq_clear()
342 			dev_err(info->dev, "Failed to clear INT_SRC%d : %d\n",  in nvvrs_pseq_irq_clear()
357 	ret = i2c_smbus_read_byte_data(info->client, NVVRS_REG_INT_SRC1);  in nvvrs_rtc_irq_handler()
362 		rtc_lock(info->rtc);  in nvvrs_rtc_irq_handler()
363 		rtc_update_irq(info->rtc, 1, RTC_IRQF | RTC_AF);  in nvvrs_rtc_irq_handler()
364 		rtc_unlock(info->rtc);  in nvvrs_rtc_irq_handler()
394 	struct i2c_client *client = info->client;  in nvvrs_pseq_vendor_info()
400 		return dev_err_probe(&client->dev, ret,  in nvvrs_pseq_vendor_info()
407 		return dev_err_probe(&client->dev, ret,  in nvvrs_pseq_vendor_info()
413 		return dev_err_probe(&client->dev, -ENODEV,  in nvvrs_pseq_vendor_info()
418 	dev_dbg(&client->dev, "NVVRS Vendor ID: 0x%02x, Model Rev: 0x%02x\n",  in nvvrs_pseq_vendor_info()
429 	info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);  in nvvrs_rtc_probe()
431 		return -ENOMEM;  in nvvrs_rtc_probe()
433 	if (client->irq <= 0)  in nvvrs_rtc_probe()
434 		return dev_err_probe(&client->dev, -EINVAL, "No IRQ specified\n");  in nvvrs_rtc_probe()
436 	info->irq = client->irq;  in nvvrs_rtc_probe()
437 	info->dev = &client->dev;  in nvvrs_rtc_probe()
438 	client->flags |= I2C_CLIENT_PEC;  in nvvrs_rtc_probe()
440 	info->client = client;  in nvvrs_rtc_probe()
444 		return dev_err_probe(&client->dev, -EINVAL,  in nvvrs_rtc_probe()
449 		return dev_err_probe(&client->dev, -EINVAL,  in nvvrs_rtc_probe()
453 	info->rtc = devm_rtc_allocate_device(info->dev);  in nvvrs_rtc_probe()
454 	if (IS_ERR(info->rtc))  in nvvrs_rtc_probe()
455 		return PTR_ERR(info->rtc);  in nvvrs_rtc_probe()
457 	info->rtc->ops = &nvvrs_rtc_ops;  in nvvrs_rtc_probe()
458 	info->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;  in nvvrs_rtc_probe()
459 	info->rtc->range_max = RTC_TIMESTAMP_END_2099;  in nvvrs_rtc_probe()
462 	ret = devm_request_threaded_irq(info->dev, info->irq, NULL,  in nvvrs_rtc_probe()
464 					"nvvrs-rtc", info);  in nvvrs_rtc_probe()
466 		dev_err_probe(info->dev, ret, "Failed to request RTC IRQ\n");  in nvvrs_rtc_probe()
471 	devm_device_init_wakeup(info->dev);  in nvvrs_rtc_probe()
473 	return devm_rtc_register_device(info->rtc);  in nvvrs_rtc_probe()
488 			dev_err(info->dev, "Failed to set RTC_WAKE bit (%d)\n",  in nvvrs_rtc_suspend()
493 		return enable_irq_wake(info->irq);  in nvvrs_rtc_suspend()
509 			dev_err(info->dev, "Failed to clear FORCE_ACT bit (%d)\n",  in nvvrs_rtc_resume()
514 		return disable_irq_wake(info->irq);  in nvvrs_rtc_resume()
524 	{ .compatible = "nvidia,vrs-10" },
531 		.name   = "rtc-nvidia-vrs10",