1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2007-2009 ST-Ericsson AB
6  * Driver to read out OTP from the AB3100 Mixed-signal circuit
19 /* The OTP registers */
33  * @locked: whether the OTP is locked, after locking, no more bits
35  *       to change bits from 1->0.
36  * @freq: clocking frequency for the OTP, this frequency is either
62 static int __init ab3100_otp_read(struct ab3100_otp *otp)  in ab3100_otp_read()  argument
68 	err = abx500_get_register_interruptible(otp->dev, 0,  in ab3100_otp_read()
71 		dev_err(otp->dev, "unable to read OTPP register\n");  in ab3100_otp_read()
75 	err = abx500_get_register_page_interruptible(otp->dev, 0,  in ab3100_otp_read()
78 		dev_err(otp->dev, "unable to read OTP register page\n");  in ab3100_otp_read()
82 	/* Cache OTP properties, they never change by nature */  in ab3100_otp_read()
83 	otp->locked = (otpp & 0x80);  in ab3100_otp_read()
84 	otp->freq = (otpp & 0x40) ? 32768 : 34100;  in ab3100_otp_read()
85 	otp->paf = (otpval[1] & 0x80);  in ab3100_otp_read()
86 	otp->imeich = (otpval[1] & 0x40);  in ab3100_otp_read()
87 	otp->cid = ((otpval[1] << 8) | otpval[0]) & 0x3fff;  in ab3100_otp_read()
88 	otp->tac = ((otpval[4] & 0x0f) << 16) | (otpval[3] << 8) | otpval[2];  in ab3100_otp_read()
89 	otp->fac = ((otpval[5] & 0x0f) << 4) | (otpval[4] >> 4);  in ab3100_otp_read()
90 	otp->svn = (otpval[7] << 12) | (otpval[6] << 4) | (otpval[5] >> 4);  in ab3100_otp_read()
95  * This is a simple debugfs human-readable file that dumps out
96  * the contents of the OTP.
101 	struct ab3100_otp *otp = s->private;  in ab3100_show_otp()  local
103 	seq_printf(s, "OTP is %s\n", otp->locked ? "LOCKED" : "UNLOCKED");  in ab3100_show_otp()
104 	seq_printf(s, "OTP clock switch startup is %uHz\n", otp->freq);  in ab3100_show_otp()
105 	seq_printf(s, "PAF is %s\n", otp->paf ? "SET" : "NOT SET");  in ab3100_show_otp()
106 	seq_printf(s, "IMEI is %s\n", otp->imeich ?  in ab3100_show_otp()
108 	seq_printf(s, "CID: 0x%04x (decimal: %d)\n", otp->cid, otp->cid);  in ab3100_show_otp()
109 	seq_printf(s, "IMEI: %u-%u-%u\n", otp->tac, otp->fac, otp->svn);  in ab3100_show_otp()
115 	return single_open(file, ab3100_show_otp, inode->i_private);  in ab3100_otp_open()
126 					   struct ab3100_otp *otp)  in ab3100_otp_init_debugfs()  argument
128 	otp->debugfs = debugfs_create_file("ab3100_otp", S_IFREG | S_IRUGO,  in ab3100_otp_init_debugfs()
129 					   NULL, otp, &ab3100_otp_operations);  in ab3100_otp_init_debugfs()
132 static void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)  in ab3100_otp_exit_debugfs()  argument
134 	debugfs_remove(otp->debugfs);  in ab3100_otp_exit_debugfs()
139 						  struct ab3100_otp *otp)  in ab3100_otp_init_debugfs()  argument
143 static inline void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)  in ab3100_otp_exit_debugfs()  argument
153 	struct ab3100_otp *otp = dev_get_drvdata(dev); \
154 	return sprintf(buf, "%u\n", otp->name); \
179 	struct ab3100_otp *otp;  in ab3100_otp_probe()  local
183 	otp = devm_kzalloc(&pdev->dev, sizeof(struct ab3100_otp), GFP_KERNEL);  in ab3100_otp_probe()
184 	if (!otp)  in ab3100_otp_probe()
185 		return -ENOMEM;  in ab3100_otp_probe()
187 	otp->dev = &pdev->dev;  in ab3100_otp_probe()
190 	platform_set_drvdata(pdev, otp);  in ab3100_otp_probe()
192 	err = ab3100_otp_read(otp);  in ab3100_otp_probe()
196 	dev_info(&pdev->dev, "AB3100 OTP readout registered\n");  in ab3100_otp_probe()
200 		err = device_create_file(&pdev->dev,  in ab3100_otp_probe()
207 	ab3100_otp_init_debugfs(&pdev->dev, otp);  in ab3100_otp_probe()
212 	while (--i >= 0)  in ab3100_otp_probe()
213 		device_remove_file(&pdev->dev, &ab3100_otp_attrs[i]);  in ab3100_otp_probe()
219 	struct ab3100_otp *otp = platform_get_drvdata(pdev);  in ab3100_otp_remove()  local
223 		device_remove_file(&pdev->dev,  in ab3100_otp_remove()
225 	ab3100_otp_exit_debugfs(otp);  in ab3100_otp_remove()
231 		.name = "ab3100-otp",
239 MODULE_DESCRIPTION("AB3100 OTP Readout Driver");