1 // SPDX-License-Identifier: GPL-2.0-or-later
4  * Copyright (c) 2009-2010 Analog Devices, Inc.
8  * AD5258		1		64		1, 10, 50, 100
9  * AD5259		1		256		5, 10, 50, 100
10  * AD5251		2		64		1, 10, 50, 100
11  * AD5252		2		256		1, 10, 50, 100
13  * AD5253		4		64		1, 10, 50, 100
14  * AD5254		4		256		1, 10, 50, 100
15  * AD5160		1		256		5, 10, 50, 100
16  * AD5161		1		256		5, 10, 50, 100
17  * AD5162		2		256		2.5, 10, 50, 100
18  * AD5165		1		256		100
21  * AD5203		4		64		10, 100
22  * AD5204		4		256		10, 50, 100
23  * AD5206		6		256		10, 50, 100
24  * AD5207		2		256		10, 50, 100
25  * AD5231		1		1024		10, 50, 100
26  * AD5232		2		256		10, 50, 100
27  * AD5233		4		64		10, 50, 100
32  * AD5290		1		256		10, 50, 100
33  * AD5291		1		256		20, 50, 100  (20-TP)
34  * AD5292		1		1024		20, 50, 100  (20-TP)
35  * AD5293		1		1024		20, 50, 100
36  * AD7376		1		128		10, 50, 100, 1M
37  * AD8400		1		256		1, 10, 50, 100
38  * AD8402		2		256		1, 10, 50, 100
39  * AD8403		4		256		1, 10, 50, 100
41  * AD5241		1		256		10, 100, 1M
42  * AD5246		1		128		5, 10, 50, 100
43  * AD5247		1		128		5, 10, 50, 100
44  * AD5245		1		256		5, 10, 50, 100
45  * AD5243		2		256		2.5, 10, 50, 100
46  * AD5248		2		256		2.5, 10, 50, 100
51  * AD5273		1		64		1, 10, 50, 100 (OTP)
52  * AD5171		1		64		5, 10, 50, 100 (OTP)
53  * AD5170		1		256		2.5, 10, 50, 100 (OTP)
54  * AD5172		2		256		2.5, 10, 50, 100 (OTP)
55  * AD5173		2		256		2.5, 10, 50, 100 (OTP)
56  * AD5270		1		1024		20, 50, 100 (50-TP)
57  * AD5271		1		256		20, 50, 100 (50-TP)
58  * AD5272		1		1024		20, 50, 100 (50-TP)
59  * AD5274		1		256		20, 50, 100 (50-TP)
61  * See Documentation/misc-devices/ad525x_dpot.rst for more info.
68  * Copyright (c) 2006-2011 Michael Hennerich <michael.hennerich@analog.com>
98 	return dpot->bdata.bops->read_d8(dpot->bdata.client);  in dpot_read_d8()
103 	return dpot->bdata.bops->read_r8d8(dpot->bdata.client, reg);  in dpot_read_r8d8()
108 	return dpot->bdata.bops->read_r8d16(dpot->bdata.client, reg);  in dpot_read_r8d16()
113 	return dpot->bdata.bops->write_d8(dpot->bdata.client, val);  in dpot_write_d8()
118 	return dpot->bdata.bops->write_r8d8(dpot->bdata.client, reg, val);  in dpot_write_r8d8()
123 	return dpot->bdata.bops->write_r8d16(dpot->bdata.client, reg, val);  in dpot_write_r8d16()
133 		if (dpot->feat & F_RDACS_WONLY)  in dpot_read_spi()
134 			return dpot->rdac_cache[reg & DPOT_RDAC_MASK];  in dpot_read_spi()
135 		if (dpot->uid == DPOT_UID(AD5291_ID) ||  in dpot_read_spi()
136 			dpot->uid == DPOT_UID(AD5292_ID) ||  in dpot_read_spi()
137 			dpot->uid == DPOT_UID(AD5293_ID)) {  in dpot_read_spi()
145 			if (dpot->uid == DPOT_UID(AD5291_ID))  in dpot_read_spi()
149 		} else if (dpot->uid == DPOT_UID(AD5270_ID) ||  in dpot_read_spi()
150 			dpot->uid == DPOT_UID(AD5271_ID)) {  in dpot_read_spi()
158 			if (dpot->uid == DPOT_UID(AD5271_ID))  in dpot_read_spi()
169 	if (dpot->feat & F_SPI_16BIT)  in dpot_read_spi()
171 	else if (dpot->feat & F_SPI_24BIT)  in dpot_read_spi()
174 	return -EFAULT;  in dpot_read_spi()
182 	switch (dpot->uid) {  in dpot_read_i2c()
219 		if (dpot->uid == DPOT_UID(AD5274_ID))  in dpot_read_i2c()
223 		if ((reg & DPOT_REG_TOL) || (dpot->max_pos > 256))  in dpot_read_i2c()
233 	if (dpot->feat & F_SPI)  in dpot_read()
244 		if (dpot->feat & F_RDACS_WONLY)  in dpot_write_spi()
245 			dpot->rdac_cache[reg & DPOT_RDAC_MASK] = value;  in dpot_write_spi()
247 		if (dpot->feat & F_AD_APPDATA) {  in dpot_write_spi()
248 			if (dpot->feat & F_SPI_8BIT) {  in dpot_write_spi()
250 					DPOT_MAX_POS(dpot->devid)) |  in dpot_write_spi()
253 			} else if (dpot->feat & F_SPI_16BIT) {  in dpot_write_spi()
255 					DPOT_MAX_POS(dpot->devid)) |  in dpot_write_spi()
262 			if (dpot->uid == DPOT_UID(AD5291_ID) ||  in dpot_write_spi()
263 				dpot->uid == DPOT_UID(AD5292_ID) ||  in dpot_write_spi()
264 				dpot->uid == DPOT_UID(AD5293_ID)) {  in dpot_write_spi()
269 				if (dpot->uid == DPOT_UID(AD5291_ID))  in dpot_write_spi()
275 			} else if (dpot->uid == DPOT_UID(AD5270_ID) ||  in dpot_write_spi()
276 				dpot->uid == DPOT_UID(AD5271_ID)) {  in dpot_write_spi()
281 				if (dpot->uid == DPOT_UID(AD5271_ID))  in dpot_write_spi()
308 		if (dpot->uid == DPOT_UID(AD5291_ID) ||  in dpot_write_spi()
309 			dpot->uid == DPOT_UID(AD5292_ID)) {  in dpot_write_spi()
312 		} else if (dpot->uid == DPOT_UID(AD5270_ID) ||  in dpot_write_spi()
313 			dpot->uid == DPOT_UID(AD5271_ID)) {  in dpot_write_spi()
320 	if (dpot->feat & F_SPI_16BIT)  in dpot_write_spi()
322 	else if (dpot->feat & F_SPI_24BIT)  in dpot_write_spi()
325 	return -EFAULT;  in dpot_write_spi()
333 	switch (dpot->uid) {  in dpot_write_i2c()
353 				return -EFAULT;  in dpot_write_i2c()
364 				return -EFAULT;  in dpot_write_i2c()
372 				return -EFAULT;  in dpot_write_i2c()
385 		if (dpot->uid == DPOT_UID(AD5274_ID))  in dpot_write_i2c()
394 		if (dpot->max_pos > 256)  in dpot_write_i2c()
405 	if (dpot->feat & F_SPI)  in dpot_write()
422 			test_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask) ?  in sysfs_show_reg()
426 	mutex_lock(&data->update_lock);  in sysfs_show_reg()
428 	mutex_unlock(&data->update_lock);  in sysfs_show_reg()
431 		return -EINVAL;  in sysfs_show_reg()
434 	 * the tolerance is a two-byte value where the MSB  in sysfs_show_reg()
443 		return sprintf(buf, "%u\n", value & data->rdac_mask);  in sysfs_show_reg()
456 			set_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask);  in sysfs_set_reg()
458 			clear_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask);  in sysfs_set_reg()
464 		!test_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask))  in sysfs_set_reg()
465 		return -EPERM;  in sysfs_set_reg()
471 	if (value > data->rdac_mask)  in sysfs_set_reg()
472 		value = data->rdac_mask;  in sysfs_set_reg()
474 	mutex_lock(&data->update_lock);  in sysfs_set_reg()
480 	mutex_unlock(&data->update_lock);  in sysfs_set_reg()
491 	mutex_lock(&data->update_lock);  in sysfs_do_cmd()
493 	mutex_unlock(&data->update_lock);  in sysfs_do_cmd()
498 /* ------------------------------------------------------------------------- */
610 /* ------------------------------------------------------------------------- */
641 	int err = sysfs_create_file(&dev->kobj,  in ad_dpot_add_files()
644 		err |= sysfs_create_file(&dev->kobj,  in ad_dpot_add_files()
647 		err |= sysfs_create_file(&dev->kobj,  in ad_dpot_add_files()
650 		err |= sysfs_create_file(&dev->kobj,  in ad_dpot_add_files()
652 		err |= sysfs_create_file(&dev->kobj,  in ad_dpot_add_files()
666 	sysfs_remove_file(&dev->kobj,  in ad_dpot_remove_files()
669 		sysfs_remove_file(&dev->kobj,  in ad_dpot_remove_files()
672 		sysfs_remove_file(&dev->kobj,  in ad_dpot_remove_files()
675 		sysfs_remove_file(&dev->kobj,  in ad_dpot_remove_files()
677 		sysfs_remove_file(&dev->kobj,  in ad_dpot_remove_files()
692 		err = -ENOMEM;  in ad_dpot_probe()
697 	mutex_init(&data->update_lock);  in ad_dpot_probe()
699 	data->bdata = *bdata;  in ad_dpot_probe()
700 	data->devid = devid;  in ad_dpot_probe()
702 	data->max_pos = 1 << DPOT_MAX_POS(devid);  in ad_dpot_probe()
703 	data->rdac_mask = data->max_pos - 1;  in ad_dpot_probe()
704 	data->feat = DPOT_FEAT(devid);  in ad_dpot_probe()
705 	data->uid = DPOT_UID(devid);  in ad_dpot_probe()
706 	data->wipers = DPOT_WIPERS(devid);  in ad_dpot_probe()
709 		if (data->wipers & (1 << i)) {  in ad_dpot_probe()
710 			err = ad_dpot_add_files(dev, data->feat, i);  in ad_dpot_probe()
713 			/* power-up midscale */  in ad_dpot_probe()
714 			if (data->feat & F_RDACS_WONLY)  in ad_dpot_probe()
715 				data->rdac_cache[i] = data->max_pos / 2;  in ad_dpot_probe()
718 	if (data->feat & F_CMD_INC)  in ad_dpot_probe()
719 		err = sysfs_create_group(&dev->kobj, &ad525x_group_commands);  in ad_dpot_probe()
726 	dev_info(dev, "%s %d-Position Digital Potentiometer registered\n",  in ad_dpot_probe()
727 		 name, data->max_pos);  in ad_dpot_probe()
733 		if (data->wipers & (1 << i))  in ad_dpot_probe()
734 			ad_dpot_remove_files(dev, data->feat, i);  in ad_dpot_probe()
752 		if (data->wipers & (1 << i))  in ad_dpot_remove()
753 			ad_dpot_remove_files(dev, data->feat, i);  in ad_dpot_remove()