1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Derived from https://github.com/Steve-Tech/SPD5118-DKMS
24 #include <linux/nvmem-provider.h>
54 #define SPD5118_CAP_TS_SUPPORT		BIT(1)	/* temperature sensor support */
56 #define SPD5118_TS_DISABLE		BIT(0)	/* temperature sensor disable */
72 #define SPD5118_TEMP_RANGE_MIN		-256000
118 		return -EOPNOTSUPP;  in spd5118_read_temp()
150 		return -EOPNOTSUPP;  in spd5118_read_alarm()
180 		return -EOPNOTSUPP;  in spd5118_read()
197 		return -EOPNOTSUPP;  in spd5118_read()
221 		return -EOPNOTSUPP;  in spd5118_write_temp()
234 		return -EINVAL;  in spd5118_write_enable()
252 		return -EOPNOTSUPP;  in spd5118_temp_write()
265 		return -EOPNOTSUPP;  in spd5118_write()
295  * Bank and vendor id are 8-bit fields with seven data bits and odd parity.
308 /* Return 0 if detection is successful, -ENODEV otherwise */
311 	struct i2c_adapter *adapter = client->adapter;  in spd5118_detect()
316 		return -ENODEV;  in spd5118_detect()
320 		return -ENODEV;  in spd5118_detect()
324 		return -ENODEV;  in spd5118_detect()
328 		return -ENODEV;  in spd5118_detect()
330 		return -ENODEV;  in spd5118_detect()
334 		return -ENODEV;  in spd5118_detect()
337 		return -ENODEV;  in spd5118_detect()
341 		return -ENODEV;  in spd5118_detect()
345 		return -ENODEV;  in spd5118_detect()
347 		return -ENODEV;  in spd5118_detect()
349 	strscpy(info->type, "spd5118", I2C_NAME_SIZE);  in spd5118_detect()
389 		count = SPD5118_PAGE_SIZE - offset;  in spd5118_nvmem_read_page()
408 		return -EINVAL;  in spd5118_nvmem_read()
410 	mutex_lock(&data->nvmem_lock);  in spd5118_nvmem_read()
413 		ret = spd5118_nvmem_read_page(data->regmap, buf, off, count);  in spd5118_nvmem_read()
415 			mutex_unlock(&data->nvmem_lock);  in spd5118_nvmem_read()
420 		count -= ret;  in spd5118_nvmem_read()
422 	mutex_unlock(&data->nvmem_lock);  in spd5118_nvmem_read()
512 	struct i2c_adapter *adapter = client->adapter;  in spd5118_init()
517 		return -ENODEV;  in spd5118_init()
521 		return -ENODEV;  in spd5118_init()
525 	 * has a non-zero page selected and takes the specification literally,  in spd5118_init()
533 			return -ENODEV;  in spd5118_init()
539 			return -ENODEV;  in spd5118_init()
544 			return -ENODEV;  in spd5118_init()
554 			return -ENODEV;  in spd5118_init()
558 	/* We are reasonably sure that this is really a SPD5118 hub controller */  in spd5118_init()
564 	struct device *dev = &client->dev;  in spd5118_probe()
577 		return -ENOMEM;  in spd5118_probe()
587 		return -ENODEV;  in spd5118_probe()
600 		return -ENODEV;  in spd5118_probe()
602 	data->regmap = regmap;  in spd5118_probe()
603 	mutex_init(&data->nvmem_lock);  in spd5118_probe()
608 	if (err && err != -EOPNOTSUPP) {  in spd5118_probe()
620 	 * From JESD300-5B  in spd5118_probe()
624 	dev_info(dev, "DDR5 temperature sensor: vendor 0x%02x:0x%02x revision %d.%d\n",  in spd5118_probe()
633 	struct regmap *regmap = data->regmap;  in spd5118_suspend()
659 	struct regmap *regmap = data->regmap;  in spd5118_resume()
695 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");