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