tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
4 */
5
6#include <linux/platform_device.h>
7#include "tsens.h"
8
9/* eeprom layout data for 8916 */
10#define BASE0_MASK 0x0000007f
11#define BASE1_MASK 0xfe000000
12#define BASE0_SHIFT 0
13#define BASE1_SHIFT 25
14
15#define S0_P1_MASK 0x00000f80
16#define S1_P1_MASK 0x003e0000
17#define S2_P1_MASK 0xf8000000
18#define S3_P1_MASK 0x000003e0
19#define S4_P1_MASK 0x000f8000
20
21#define S0_P2_MASK 0x0001f000
22#define S1_P2_MASK 0x07c00000
23#define S2_P2_MASK 0x0000001f
24#define S3_P2_MASK 0x00007c00
25#define S4_P2_MASK 0x01f00000
26
27#define S0_P1_SHIFT 7
28#define S1_P1_SHIFT 17
29#define S2_P1_SHIFT 27
30#define S3_P1_SHIFT 5
31#define S4_P1_SHIFT 15
32
33#define S0_P2_SHIFT 12
34#define S1_P2_SHIFT 22
35#define S2_P2_SHIFT 0
36#define S3_P2_SHIFT 10
37#define S4_P2_SHIFT 20
38
39#define CAL_SEL_MASK 0xe0000000
40#define CAL_SEL_SHIFT 29
41
42static int calibrate_8916(struct tsens_device *tmdev)
43{
44 int base0 = 0, base1 = 0, i;
45 u32 p1[5], p2[5];
46 int mode = 0;
47 u32 *qfprom_cdata, *qfprom_csel;
48
49 qfprom_cdata = (u32 *)qfprom_read(tmdev->dev, "calib");
50 if (IS_ERR(qfprom_cdata))
51 return PTR_ERR(qfprom_cdata);
52
53 qfprom_csel = (u32 *)qfprom_read(tmdev->dev, "calib_sel");
54 if (IS_ERR(qfprom_csel))
55 return PTR_ERR(qfprom_csel);
56
57 mode = (qfprom_csel[0] & CAL_SEL_MASK) >> CAL_SEL_SHIFT;
58 dev_dbg(tmdev->dev, "calibration mode is %d\n", mode);
59
60 switch (mode) {
61 case TWO_PT_CALIB:
62 base1 = (qfprom_cdata[1] & BASE1_MASK) >> BASE1_SHIFT;
63 p2[0] = (qfprom_cdata[0] & S0_P2_MASK) >> S0_P2_SHIFT;
64 p2[1] = (qfprom_cdata[0] & S1_P2_MASK) >> S1_P2_SHIFT;
65 p2[2] = (qfprom_cdata[1] & S2_P2_MASK) >> S2_P2_SHIFT;
66 p2[3] = (qfprom_cdata[1] & S3_P2_MASK) >> S3_P2_SHIFT;
67 p2[4] = (qfprom_cdata[1] & S4_P2_MASK) >> S4_P2_SHIFT;
68 for (i = 0; i < tmdev->num_sensors; i++)
69 p2[i] = ((base1 + p2[i]) << 3);
70 /* Fall through */
71 case ONE_PT_CALIB2:
72 base0 = (qfprom_cdata[0] & BASE0_MASK);
73 p1[0] = (qfprom_cdata[0] & S0_P1_MASK) >> S0_P1_SHIFT;
74 p1[1] = (qfprom_cdata[0] & S1_P1_MASK) >> S1_P1_SHIFT;
75 p1[2] = (qfprom_cdata[0] & S2_P1_MASK) >> S2_P1_SHIFT;
76 p1[3] = (qfprom_cdata[1] & S3_P1_MASK) >> S3_P1_SHIFT;
77 p1[4] = (qfprom_cdata[1] & S4_P1_MASK) >> S4_P1_SHIFT;
78 for (i = 0; i < tmdev->num_sensors; i++)
79 p1[i] = (((base0) + p1[i]) << 3);
80 break;
81 default:
82 for (i = 0; i < tmdev->num_sensors; i++) {
83 p1[i] = 500;
84 p2[i] = 780;
85 }
86 break;
87 }
88
89 compute_intercept_slope(tmdev, p1, p2, mode);
90
91 return 0;
92}
93
94static const struct tsens_ops ops_8916 = {
95 .init = init_common,
96 .calibrate = calibrate_8916,
97 .get_temp = get_temp_common,
98};
99
100const struct tsens_data data_8916 = {
101 .num_sensors = 5,
102 .ops = &ops_8916,
103 .reg_offsets = { [SROT_CTRL_OFFSET] = 0x0 },
104 .hw_ids = (unsigned int []){0, 1, 2, 4, 5 },
105};