acpi/pmic/intel_pmic_chtdc_ti.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Dollar Cove TI PMIC operation region driver
0004  * Copyright (C) 2014 Intel Corporation. All rights reserved.
0005  *
0006  * Rewritten and cleaned up
0007  * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
0008  */
0009
0010 #include <linux/acpi.h>
0011 #include <linux/init.h>
0012 #include <linux/mfd/intel_soc_pmic.h>
0013 #include <linux/platform_device.h>
0014 #include "intel_pmic.h"
0015
0016 /* registers stored in 16bit BE (high:low, total 10bit) */
0017 #define CHTDC_TI_VBAT       0x54
0018 #define CHTDC_TI_DIETEMP    0x56
0019 #define CHTDC_TI_BPTHERM    0x58
0020 #define CHTDC_TI_GPADC      0x5a
0021
0022 static struct pmic_table chtdc_ti_power_table[] = {
0023     { .address = 0x00, .reg = 0x41 },
0024     { .address = 0x04, .reg = 0x42 },
0025     { .address = 0x08, .reg = 0x43 },
0026     { .address = 0x0c, .reg = 0x45 },
0027     { .address = 0x10, .reg = 0x46 },
0028     { .address = 0x14, .reg = 0x47 },
0029     { .address = 0x18, .reg = 0x48 },
0030     { .address = 0x1c, .reg = 0x49 },
0031     { .address = 0x20, .reg = 0x4a },
0032     { .address = 0x24, .reg = 0x4b },
0033     { .address = 0x28, .reg = 0x4c },
0034     { .address = 0x2c, .reg = 0x4d },
0035     { .address = 0x30, .reg = 0x4e },
0036 };
0037
0038 static struct pmic_table chtdc_ti_thermal_table[] = {
0039     {
0040         .address = 0x00,
0041         .reg = CHTDC_TI_GPADC
0042     },
0043     {
0044         .address = 0x0c,
0045         .reg = CHTDC_TI_GPADC
0046     },
0047     /* TMP2 -> SYSTEMP */
0048     {
0049         .address = 0x18,
0050         .reg = CHTDC_TI_GPADC
0051     },
0052     /* TMP3 -> BPTHERM */
0053     {
0054         .address = 0x24,
0055         .reg = CHTDC_TI_BPTHERM
0056     },
0057     {
0058         .address = 0x30,
0059         .reg = CHTDC_TI_GPADC
0060     },
0061     /* TMP5 -> DIETEMP */
0062     {
0063         .address = 0x3c,
0064         .reg = CHTDC_TI_DIETEMP
0065     },
0066 };
0067
0068 static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
0069                    u64 *value)
0070 {
0071     int data;
0072
0073     if (regmap_read(regmap, reg, &data))
0074         return -EIO;
0075
0076     *value = data & 1;
0077     return 0;
0078 }
0079
0080 static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
0081                       bool on)
0082 {
0083     return regmap_update_bits(regmap, reg, 1, on);
0084 }
0085
0086 static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
0087 {
0088     u8 buf[2];
0089
0090     if (regmap_bulk_read(regmap, reg, buf, 2))
0091         return -EIO;
0092
0093     /* stored in big-endian */
0094     return ((buf[0] & 0x03) << 8) | buf[1];
0095 }
0096
0097 static const struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = {
0098     .get_power = chtdc_ti_pmic_get_power,
0099     .update_power = chtdc_ti_pmic_update_power,
0100     .get_raw_temp = chtdc_ti_pmic_get_raw_temp,
0101     .lpat_raw_to_temp = acpi_lpat_raw_to_temp,
0102     .power_table = chtdc_ti_power_table,
0103     .power_table_count = ARRAY_SIZE(chtdc_ti_power_table),
0104     .thermal_table = chtdc_ti_thermal_table,
0105     .thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),
0106     .pmic_i2c_address = 0x5e,
0107 };
0108
0109 static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
0110 {
0111     struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
0112     int err;
0113
0114     err = intel_pmic_install_opregion_handler(&pdev->dev,
0115             ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
0116             &chtdc_ti_pmic_opregion_data);
0117     if (err < 0)
0118         return err;
0119
0120     /* Re-enumerate devices depending on PMIC */
0121     acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent));
0122     return 0;
0123 }
0124
0125 static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
0126     { .name = "chtdc_ti_region" },
0127     {},
0128 };
0129
0130 static struct platform_driver chtdc_ti_pmic_opregion_driver = {
0131     .probe = chtdc_ti_pmic_opregion_probe,
0132     .driver = {
0133         .name = "cht_dollar_cove_ti_pmic",
0134     },
0135     .id_table = chtdc_ti_pmic_opregion_id_table,
0136 };
0137 builtin_platform_driver(chtdc_ti_pmic_opregion_driver);