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-rw-r--r--drivers/mfd/wm831x-core.c4
-rw-r--r--drivers/mfd/wm831x-otp.c83
-rw-r--r--include/linux/mfd/wm831x/otp.h162
3 files changed, 249 insertions, 0 deletions
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index bc40ea315cc0..33eaea2f988e 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -23,6 +23,7 @@
23#include <linux/mfd/wm831x/pdata.h> 23#include <linux/mfd/wm831x/pdata.h>
24#include <linux/mfd/wm831x/irq.h> 24#include <linux/mfd/wm831x/irq.h>
25#include <linux/mfd/wm831x/auxadc.h> 25#include <linux/mfd/wm831x/auxadc.h>
26#include <linux/mfd/wm831x/otp.h>
26 27
27enum wm831x_parent { 28enum wm831x_parent {
28 WM8310 = 0, 29 WM8310 = 0,
@@ -1340,6 +1341,8 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
1340 ret); 1341 ret);
1341 } 1342 }
1342 1343
1344 wm831x_otp_init(wm831x);
1345
1343 if (pdata && pdata->post_init) { 1346 if (pdata && pdata->post_init) {
1344 ret = pdata->post_init(wm831x); 1347 ret = pdata->post_init(wm831x);
1345 if (ret != 0) { 1348 if (ret != 0) {
@@ -1360,6 +1363,7 @@ err:
1360 1363
1361static void wm831x_device_exit(struct wm831x *wm831x) 1364static void wm831x_device_exit(struct wm831x *wm831x)
1362{ 1365{
1366 wm831x_otp_exit(wm831x);
1363 mfd_remove_devices(wm831x->dev); 1367 mfd_remove_devices(wm831x->dev);
1364 wm831x_irq_exit(wm831x); 1368 wm831x_irq_exit(wm831x);
1365 kfree(wm831x); 1369 kfree(wm831x);
diff --git a/drivers/mfd/wm831x-otp.c b/drivers/mfd/wm831x-otp.c
new file mode 100644
index 000000000000..f742745ff354
--- /dev/null
+++ b/drivers/mfd/wm831x-otp.c
@@ -0,0 +1,83 @@
1/*
2 * wm831x-otp.c -- OTP for Wolfson WM831x PMICs
3 *
4 * Copyright 2009 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/i2c.h>
18#include <linux/bcd.h>
19#include <linux/delay.h>
20#include <linux/mfd/core.h>
21
22#include <linux/mfd/wm831x/core.h>
23#include <linux/mfd/wm831x/otp.h>
24
25/* In bytes */
26#define WM831X_UNIQUE_ID_LEN 16
27
28/* Read the unique ID from the chip into id */
29static int wm831x_unique_id_read(struct wm831x *wm831x, char *id)
30{
31 int i, val;
32
33 for (i = 0; i < WM831X_UNIQUE_ID_LEN / 2; i++) {
34 val = wm831x_reg_read(wm831x, WM831X_UNIQUE_ID_1 + i);
35 if (val < 0)
36 return val;
37
38 id[i * 2] = (val >> 8) & 0xff;
39 id[(i * 2) + 1] = val & 0xff;
40 }
41
42 return 0;
43}
44
45static ssize_t wm831x_unique_id_show(struct device *dev,
46 struct device_attribute *attr, char *buf)
47{
48 struct wm831x *wm831x = dev_get_drvdata(dev);
49 int i, rval;
50 char id[WM831X_UNIQUE_ID_LEN];
51 ssize_t ret = 0;
52
53 rval = wm831x_unique_id_read(wm831x, id);
54 if (rval < 0)
55 return 0;
56
57 for (i = 0; i < WM831X_UNIQUE_ID_LEN; i++)
58 ret += sprintf(&buf[ret], "%02x", buf[i]);
59
60 ret += sprintf(&buf[ret], "\n");
61
62 return ret;
63}
64
65static DEVICE_ATTR(unique_id, 0444, wm831x_unique_id_show, NULL);
66
67int wm831x_otp_init(struct wm831x *wm831x)
68{
69 int ret;
70
71 ret = device_create_file(wm831x->dev, &dev_attr_unique_id);
72 if (ret != 0)
73 dev_err(wm831x->dev, "Unique ID attribute not created: %d\n",
74 ret);
75
76 return ret;
77}
78
79void wm831x_otp_exit(struct wm831x *wm831x)
80{
81 device_remove_file(wm831x->dev, &dev_attr_unique_id);
82}
83
diff --git a/include/linux/mfd/wm831x/otp.h b/include/linux/mfd/wm831x/otp.h
new file mode 100644
index 000000000000..ce1f81a39bfc
--- /dev/null
+++ b/include/linux/mfd/wm831x/otp.h
@@ -0,0 +1,162 @@
1/*
2 * include/linux/mfd/wm831x/otp.h -- OTP interface for WM831x
3 *
4 * Copyright 2009 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#ifndef __MFD_WM831X_OTP_H__
16#define __MFD_WM831X_OTP_H__
17
18int wm831x_otp_init(struct wm831x *wm831x);
19void wm831x_otp_exit(struct wm831x *wm831x);
20
21/*
22 * R30720 (0x7800) - Unique ID 1
23 */
24#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
25#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
26#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
27
28/*
29 * R30721 (0x7801) - Unique ID 2
30 */
31#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
32#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
33#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
34
35/*
36 * R30722 (0x7802) - Unique ID 3
37 */
38#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
39#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
40#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
41
42/*
43 * R30723 (0x7803) - Unique ID 4
44 */
45#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
46#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
47#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
48
49/*
50 * R30724 (0x7804) - Unique ID 5
51 */
52#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
53#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
54#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
55
56/*
57 * R30725 (0x7805) - Unique ID 6
58 */
59#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
60#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
61#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
62
63/*
64 * R30726 (0x7806) - Unique ID 7
65 */
66#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
67#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
68#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
69
70/*
71 * R30727 (0x7807) - Unique ID 8
72 */
73#define WM831X_UNIQUE_ID_MASK 0xFFFF /* UNIQUE_ID - [15:0] */
74#define WM831X_UNIQUE_ID_SHIFT 0 /* UNIQUE_ID - [15:0] */
75#define WM831X_UNIQUE_ID_WIDTH 16 /* UNIQUE_ID - [15:0] */
76
77/*
78 * R30728 (0x7808) - Factory OTP ID
79 */
80#define WM831X_OTP_FACT_ID_MASK 0xFFFE /* OTP_FACT_ID - [15:1] */
81#define WM831X_OTP_FACT_ID_SHIFT 1 /* OTP_FACT_ID - [15:1] */
82#define WM831X_OTP_FACT_ID_WIDTH 15 /* OTP_FACT_ID - [15:1] */
83#define WM831X_OTP_FACT_FINAL 0x0001 /* OTP_FACT_FINAL */
84#define WM831X_OTP_FACT_FINAL_MASK 0x0001 /* OTP_FACT_FINAL */
85#define WM831X_OTP_FACT_FINAL_SHIFT 0 /* OTP_FACT_FINAL */
86#define WM831X_OTP_FACT_FINAL_WIDTH 1 /* OTP_FACT_FINAL */
87
88/*
89 * R30729 (0x7809) - Factory OTP 1
90 */
91#define WM831X_DC3_TRIM_MASK 0xF000 /* DC3_TRIM - [15:12] */
92#define WM831X_DC3_TRIM_SHIFT 12 /* DC3_TRIM - [15:12] */
93#define WM831X_DC3_TRIM_WIDTH 4 /* DC3_TRIM - [15:12] */
94#define WM831X_DC2_TRIM_MASK 0x0FC0 /* DC2_TRIM - [11:6] */
95#define WM831X_DC2_TRIM_SHIFT 6 /* DC2_TRIM - [11:6] */
96#define WM831X_DC2_TRIM_WIDTH 6 /* DC2_TRIM - [11:6] */
97#define WM831X_DC1_TRIM_MASK 0x003F /* DC1_TRIM - [5:0] */
98#define WM831X_DC1_TRIM_SHIFT 0 /* DC1_TRIM - [5:0] */
99#define WM831X_DC1_TRIM_WIDTH 6 /* DC1_TRIM - [5:0] */
100
101/*
102 * R30730 (0x780A) - Factory OTP 2
103 */
104#define WM831X_CHIP_ID_MASK 0xFFFF /* CHIP_ID - [15:0] */
105#define WM831X_CHIP_ID_SHIFT 0 /* CHIP_ID - [15:0] */
106#define WM831X_CHIP_ID_WIDTH 16 /* CHIP_ID - [15:0] */
107
108/*
109 * R30731 (0x780B) - Factory OTP 3
110 */
111#define WM831X_OSC_TRIM_MASK 0x0780 /* OSC_TRIM - [10:7] */
112#define WM831X_OSC_TRIM_SHIFT 7 /* OSC_TRIM - [10:7] */
113#define WM831X_OSC_TRIM_WIDTH 4 /* OSC_TRIM - [10:7] */
114#define WM831X_BG_TRIM_MASK 0x0078 /* BG_TRIM - [6:3] */
115#define WM831X_BG_TRIM_SHIFT 3 /* BG_TRIM - [6:3] */
116#define WM831X_BG_TRIM_WIDTH 4 /* BG_TRIM - [6:3] */
117#define WM831X_LPBG_TRIM_MASK 0x0007 /* LPBG_TRIM - [2:0] */
118#define WM831X_LPBG_TRIM_SHIFT 0 /* LPBG_TRIM - [2:0] */
119#define WM831X_LPBG_TRIM_WIDTH 3 /* LPBG_TRIM - [2:0] */
120
121/*
122 * R30732 (0x780C) - Factory OTP 4
123 */
124#define WM831X_CHILD_I2C_ADDR_MASK 0x00FE /* CHILD_I2C_ADDR - [7:1] */
125#define WM831X_CHILD_I2C_ADDR_SHIFT 1 /* CHILD_I2C_ADDR - [7:1] */
126#define WM831X_CHILD_I2C_ADDR_WIDTH 7 /* CHILD_I2C_ADDR - [7:1] */
127#define WM831X_CH_AW 0x0001 /* CH_AW */
128#define WM831X_CH_AW_MASK 0x0001 /* CH_AW */
129#define WM831X_CH_AW_SHIFT 0 /* CH_AW */
130#define WM831X_CH_AW_WIDTH 1 /* CH_AW */
131
132/*
133 * R30733 (0x780D) - Factory OTP 5
134 */
135#define WM831X_CHARGE_TRIM_MASK 0x003F /* CHARGE_TRIM - [5:0] */
136#define WM831X_CHARGE_TRIM_SHIFT 0 /* CHARGE_TRIM - [5:0] */
137#define WM831X_CHARGE_TRIM_WIDTH 6 /* CHARGE_TRIM - [5:0] */
138
139/*
140 * R30736 (0x7810) - Customer OTP ID
141 */
142#define WM831X_OTP_AUTO_PROG 0x8000 /* OTP_AUTO_PROG */
143#define WM831X_OTP_AUTO_PROG_MASK 0x8000 /* OTP_AUTO_PROG */
144#define WM831X_OTP_AUTO_PROG_SHIFT 15 /* OTP_AUTO_PROG */
145#define WM831X_OTP_AUTO_PROG_WIDTH 1 /* OTP_AUTO_PROG */
146#define WM831X_OTP_CUST_ID_MASK 0x7FFE /* OTP_CUST_ID - [14:1] */
147#define WM831X_OTP_CUST_ID_SHIFT 1 /* OTP_CUST_ID - [14:1] */
148#define WM831X_OTP_CUST_ID_WIDTH 14 /* OTP_CUST_ID - [14:1] */
149#define WM831X_OTP_CUST_FINAL 0x0001 /* OTP_CUST_FINAL */
150#define WM831X_OTP_CUST_FINAL_MASK 0x0001 /* OTP_CUST_FINAL */
151#define WM831X_OTP_CUST_FINAL_SHIFT 0 /* OTP_CUST_FINAL */
152#define WM831X_OTP_CUST_FINAL_WIDTH 1 /* OTP_CUST_FINAL */
153
154/*
155 * R30759 (0x7827) - DBE CHECK DATA
156 */
157#define WM831X_DBE_VALID_DATA_MASK 0xFFFF /* DBE_VALID_DATA - [15:0] */
158#define WM831X_DBE_VALID_DATA_SHIFT 0 /* DBE_VALID_DATA - [15:0] */
159#define WM831X_DBE_VALID_DATA_WIDTH 16 /* DBE_VALID_DATA - [15:0] */
160
161
162#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-03 07:17:57 -0400