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https://github.com/brain-hackers/u-boot-brain
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![Simon Glass](/assets/img/avatar_default.png)
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
199 lines
5.7 KiB
C
199 lines
5.7 KiB
C
/*
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* TI Bandgap temperature sensor driver
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*
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* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Taken from Linux v4.9 (drivers/thermal/ti-soc-thermal/ti-bandgap.c)
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* and ported to uboot.
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*
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*/
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#include <asm/io.h>
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#include <dm.h>
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#include <thermal.h>
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#define CTRL_CORE_TEMP_SENSOR_MPU 0
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#define DRA752_ADC_START_VALUE 540
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struct ti_bandgap {
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ulong base;
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uint adc_val;
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};
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/*
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* DRA752 : Temperature values in milli degree celsius
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* ADC code values from 540 to 945
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*/
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static int dra752_adc_to_temp[] = {
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/* Index 540 - 549 */
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-40000, -40000, -40000, -40000, -39800, -39400, -39000, -38600, -38200,
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-37800,
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/* Index 550 - 559 */
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-37400, -37000, -36600, -36200, -35800, -35300, -34700, -34200, -33800,
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-33400,
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/* Index 560 - 569 */
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-33000, -32600, -32200, -31800, -31400, -31000, -30600, -30200, -29800,
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-29400,
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/* Index 570 - 579 */
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-29000, -28600, -28200, -27700, -27100, -26600, -26200, -25800, -25400,
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-25000,
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/* Index 580 - 589 */
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-24600, -24200, -23800, -23400, -23000, -22600, -22200, -21800, -21400,
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-21000,
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/* Index 590 - 599 */
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-20500, -19900, -19400, -19000, -18600, -18200, -17800, -17400, -17000,
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-16600,
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/* Index 600 - 609 */
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-16200, -15800, -15400, -15000, -14600, -14200, -13800, -13400, -13000,
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-12500,
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/* Index 610 - 619 */
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-11900, -11400, -11000, -10600, -10200, -9800, -9400, -9000, -8600,
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-8200,
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/* Index 620 - 629 */
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-7800, -7400, -7000, -6600, -6200, -5800, -5400, -5000, -4500,
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-3900,
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/* Index 630 - 639 */
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-3400, -3000, -2600, -2200, -1800, -1400, -1000, -600, -200,
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200,
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/* Index 640 - 649 */
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600, 1000, 1400, 1800, 2200, 2600, 3000, 3400, 3900,
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4500,
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/* Index 650 - 659 */
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5000, 5400, 5800, 6200, 6600, 7000, 7400, 7800, 8200,
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8600,
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/* Index 660 - 669 */
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9000, 9400, 9800, 10200, 10600, 11000, 11400, 11800, 12200,
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12700,
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/* Index 670 - 679 */
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13300, 13800, 14200, 14600, 15000, 15400, 15800, 16200, 16600,
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17000,
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/* Index 680 - 689 */
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17400, 17800, 18200, 18600, 19000, 19400, 19800, 20200, 20600,
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21000,
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/* Index 690 - 699 */
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21400, 21900, 22500, 23000, 23400, 23800, 24200, 24600, 25000,
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25400,
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/* Index 700 - 709 */
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25800, 26200, 26600, 27000, 27400, 27800, 28200, 28600, 29000,
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29400,
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/* Index 710 - 719 */
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29800, 30200, 30600, 31000, 31400, 31900, 32500, 33000, 33400,
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33800,
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/* Index 720 - 729 */
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34200, 34600, 35000, 35400, 35800, 36200, 36600, 37000, 37400,
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37800,
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/* Index 730 - 739 */
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38200, 38600, 39000, 39400, 39800, 40200, 40600, 41000, 41400,
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41800,
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/* Index 740 - 749 */
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42200, 42600, 43100, 43700, 44200, 44600, 45000, 45400, 45800,
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46200,
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/* Index 750 - 759 */
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46600, 47000, 47400, 47800, 48200, 48600, 49000, 49400, 49800,
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50200,
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/* Index 760 - 769 */
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50600, 51000, 51400, 51800, 52200, 52600, 53000, 53400, 53800,
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54200,
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/* Index 770 - 779 */
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54600, 55000, 55400, 55900, 56500, 57000, 57400, 57800, 58200,
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58600,
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/* Index 780 - 789 */
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59000, 59400, 59800, 60200, 60600, 61000, 61400, 61800, 62200,
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62600,
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/* Index 790 - 799 */
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63000, 63400, 63800, 64200, 64600, 65000, 65400, 65800, 66200,
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66600,
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/* Index 800 - 809 */
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67000, 67400, 67800, 68200, 68600, 69000, 69400, 69800, 70200,
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70600,
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/* Index 810 - 819 */
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71000, 71500, 72100, 72600, 73000, 73400, 73800, 74200, 74600,
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75000,
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/* Index 820 - 829 */
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75400, 75800, 76200, 76600, 77000, 77400, 77800, 78200, 78600,
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79000,
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/* Index 830 - 839 */
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79400, 79800, 80200, 80600, 81000, 81400, 81800, 82200, 82600,
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83000,
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/* Index 840 - 849 */
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83400, 83800, 84200, 84600, 85000, 85400, 85800, 86200, 86600,
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87000,
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/* Index 850 - 859 */
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87400, 87800, 88200, 88600, 89000, 89400, 89800, 90200, 90600,
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91000,
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/* Index 860 - 869 */
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91400, 91800, 92200, 92600, 93000, 93400, 93800, 94200, 94600,
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95000,
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/* Index 870 - 879 */
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95400, 95800, 96200, 96600, 97000, 97500, 98100, 98600, 99000,
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99400,
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/* Index 880 - 889 */
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99800, 100200, 100600, 101000, 101400, 101800, 102200, 102600, 103000,
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103400,
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/* Index 890 - 899 */
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103800, 104200, 104600, 105000, 105400, 105800, 106200, 106600, 107000,
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107400,
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/* Index 900 - 909 */
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107800, 108200, 108600, 109000, 109400, 109800, 110200, 110600, 111000,
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111400,
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/* Index 910 - 919 */
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111800, 112200, 112600, 113000, 113400, 113800, 114200, 114600, 115000,
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115400,
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/* Index 920 - 929 */
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115800, 116200, 116600, 117000, 117400, 117800, 118200, 118600, 119000,
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119400,
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/* Index 930 - 939 */
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119800, 120200, 120600, 121000, 121400, 121800, 122200, 122600, 123000,
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123400,
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/* Index 940 - 945 */
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123800, 124200, 124600, 124900, 125000, 125000,
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};
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static int ti_bandgap_get_temp(struct udevice *dev, int *temp)
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{
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struct ti_bandgap *bgp = dev_get_priv(dev);
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bgp->adc_val = 0x3ff & readl(bgp->base + CTRL_CORE_TEMP_SENSOR_MPU);
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*temp = dra752_adc_to_temp[bgp->adc_val - DRA752_ADC_START_VALUE];
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return 0;
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}
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static struct dm_thermal_ops ti_thermal_ops = {
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.get_temp = ti_bandgap_get_temp,
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};
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static int ti_bandgap_probe(struct udevice *dev)
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{
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struct ti_bandgap *bgp = dev_get_priv(dev);
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bgp->base = devfdt_get_addr_index(dev, 1);
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return 0;
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}
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static const struct udevice_id of_ti_bandgap_match[] = {
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{
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.compatible = "ti,dra752-bandgap",
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},
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{},
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};
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U_BOOT_DRIVER(ti_bandgap_thermal) = {
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.name = "ti_bandgap_thermal",
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.id = UCLASS_THERMAL,
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.ops = &ti_thermal_ops,
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.probe = ti_bandgap_probe,
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.of_match = of_ti_bandgap_match,
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.priv_auto = sizeof(struct ti_bandgap),
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};
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