1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Dollar Cove TI PMIC operation region driver 4 * Copyright (C) 2014 Intel Corporation. All rights reserved. 5 * 6 * Rewritten and cleaned up 7 * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de> 8 */ 9 10 #include <linux/acpi.h> 11 #include <linux/init.h> 12 #include <linux/mfd/intel_soc_pmic.h> 13 #include <linux/platform_device.h> 14 #include "intel_pmic.h" 15 16 /* registers stored in 16bit BE (high:low, total 10bit) */ 17 #define CHTDC_TI_VBAT 0x54 18 #define CHTDC_TI_DIETEMP 0x56 19 #define CHTDC_TI_BPTHERM 0x58 20 #define CHTDC_TI_GPADC 0x5a 21 22 static struct pmic_table chtdc_ti_power_table[] = { 23 { .address = 0x00, .reg = 0x41 }, 24 { .address = 0x04, .reg = 0x42 }, 25 { .address = 0x08, .reg = 0x43 }, 26 { .address = 0x0c, .reg = 0x45 }, 27 { .address = 0x10, .reg = 0x46 }, 28 { .address = 0x14, .reg = 0x47 }, 29 { .address = 0x18, .reg = 0x48 }, 30 { .address = 0x1c, .reg = 0x49 }, 31 { .address = 0x20, .reg = 0x4a }, 32 { .address = 0x24, .reg = 0x4b }, 33 { .address = 0x28, .reg = 0x4c }, 34 { .address = 0x2c, .reg = 0x4d }, 35 { .address = 0x30, .reg = 0x4e }, 36 }; 37 38 static struct pmic_table chtdc_ti_thermal_table[] = { 39 { 40 .address = 0x00, 41 .reg = CHTDC_TI_GPADC 42 }, 43 { 44 .address = 0x0c, 45 .reg = CHTDC_TI_GPADC 46 }, 47 /* TMP2 -> SYSTEMP */ 48 { 49 .address = 0x18, 50 .reg = CHTDC_TI_GPADC 51 }, 52 /* TMP3 -> BPTHERM */ 53 { 54 .address = 0x24, 55 .reg = CHTDC_TI_BPTHERM 56 }, 57 { 58 .address = 0x30, 59 .reg = CHTDC_TI_GPADC 60 }, 61 /* TMP5 -> DIETEMP */ 62 { 63 .address = 0x3c, 64 .reg = CHTDC_TI_DIETEMP 65 }, 66 }; 67 68 static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit, 69 u64 *value) 70 { 71 int data; 72 73 if (regmap_read(regmap, reg, &data)) 74 return -EIO; 75 76 *value = data & 1; 77 return 0; 78 } 79 80 static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit, 81 bool on) 82 { 83 return regmap_update_bits(regmap, reg, 1, on); 84 } 85 86 static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg) 87 { 88 u8 buf[2]; 89 90 if (regmap_bulk_read(regmap, reg, buf, 2)) 91 return -EIO; 92 93 /* stored in big-endian */ 94 return ((buf[0] & 0x03) << 8) | buf[1]; 95 } 96 97 static struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = { 98 .get_power = chtdc_ti_pmic_get_power, 99 .update_power = chtdc_ti_pmic_update_power, 100 .get_raw_temp = chtdc_ti_pmic_get_raw_temp, 101 .power_table = chtdc_ti_power_table, 102 .power_table_count = ARRAY_SIZE(chtdc_ti_power_table), 103 .thermal_table = chtdc_ti_thermal_table, 104 .thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table), 105 .pmic_i2c_address = 0x5e, 106 }; 107 108 static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev) 109 { 110 struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent); 111 int err; 112 113 err = intel_pmic_install_opregion_handler(&pdev->dev, 114 ACPI_HANDLE(pdev->dev.parent), pmic->regmap, 115 &chtdc_ti_pmic_opregion_data); 116 if (err < 0) 117 return err; 118 119 /* Re-enumerate devices depending on PMIC */ 120 acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent)); 121 return 0; 122 } 123 124 static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = { 125 { .name = "chtdc_ti_region" }, 126 {}, 127 }; 128 129 static struct platform_driver chtdc_ti_pmic_opregion_driver = { 130 .probe = chtdc_ti_pmic_opregion_probe, 131 .driver = { 132 .name = "cht_dollar_cove_ti_pmic", 133 }, 134 .id_table = chtdc_ti_pmic_opregion_id_table, 135 }; 136 builtin_platform_driver(chtdc_ti_pmic_opregion_driver); 137