^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Hardware monitoring driver for Maxim MAX8688
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2011 Ericsson AB.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "pmbus.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define MAX8688_MFR_VOUT_PEAK 0xd4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define MAX8688_MFR_IOUT_PEAK 0xd5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define MAX8688_MFR_TEMPERATURE_PEAK 0xd6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define MAX8688_MFG_STATUS 0xd8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define MAX8688_STATUS_OC_FAULT BIT(4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define MAX8688_STATUS_OV_FAULT BIT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define MAX8688_STATUS_OV_WARNING BIT(8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define MAX8688_STATUS_UV_FAULT BIT(9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define MAX8688_STATUS_UV_WARNING BIT(10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define MAX8688_STATUS_UC_FAULT BIT(11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define MAX8688_STATUS_OC_WARNING BIT(12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define MAX8688_STATUS_OT_FAULT BIT(13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define MAX8688_STATUS_OT_WARNING BIT(14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int max8688_read_word_data(struct i2c_client *client, int page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int phase, int reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) if (page > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) case PMBUS_VIRT_READ_VOUT_MAX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) ret = pmbus_read_word_data(client, 0, 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) MAX8688_MFR_VOUT_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) case PMBUS_VIRT_READ_IOUT_MAX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) ret = pmbus_read_word_data(client, 0, 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) MAX8688_MFR_IOUT_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) case PMBUS_VIRT_READ_TEMP_MAX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ret = pmbus_read_word_data(client, 0, 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) MAX8688_MFR_TEMPERATURE_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) case PMBUS_VIRT_RESET_VOUT_HISTORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) case PMBUS_VIRT_RESET_IOUT_HISTORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) case PMBUS_VIRT_RESET_TEMP_HISTORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ret = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static int max8688_write_word_data(struct i2c_client *client, int page, int reg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) u16 word)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) case PMBUS_VIRT_RESET_VOUT_HISTORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ret = pmbus_write_word_data(client, 0, MAX8688_MFR_VOUT_PEAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) case PMBUS_VIRT_RESET_IOUT_HISTORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ret = pmbus_write_word_data(client, 0, MAX8688_MFR_IOUT_PEAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) case PMBUS_VIRT_RESET_TEMP_HISTORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = pmbus_write_word_data(client, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) MAX8688_MFR_TEMPERATURE_PEAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 0xffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) ret = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static int max8688_read_byte_data(struct i2c_client *client, int page, int reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int mfg_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (page > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) case PMBUS_STATUS_VOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) mfg_status = pmbus_read_word_data(client, 0, 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) MAX8688_MFG_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (mfg_status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return mfg_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (mfg_status & MAX8688_STATUS_UV_WARNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) ret |= PB_VOLTAGE_UV_WARNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (mfg_status & MAX8688_STATUS_UV_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ret |= PB_VOLTAGE_UV_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (mfg_status & MAX8688_STATUS_OV_WARNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret |= PB_VOLTAGE_OV_WARNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (mfg_status & MAX8688_STATUS_OV_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ret |= PB_VOLTAGE_OV_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) case PMBUS_STATUS_IOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) mfg_status = pmbus_read_word_data(client, 0, 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) MAX8688_MFG_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (mfg_status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return mfg_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (mfg_status & MAX8688_STATUS_UC_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret |= PB_IOUT_UC_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (mfg_status & MAX8688_STATUS_OC_WARNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ret |= PB_IOUT_OC_WARNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (mfg_status & MAX8688_STATUS_OC_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) ret |= PB_IOUT_OC_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case PMBUS_STATUS_TEMPERATURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) mfg_status = pmbus_read_word_data(client, 0, 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) MAX8688_MFG_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (mfg_status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return mfg_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (mfg_status & MAX8688_STATUS_OT_WARNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ret |= PB_TEMP_OT_WARNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (mfg_status & MAX8688_STATUS_OT_FAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret |= PB_TEMP_OT_FAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ret = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static struct pmbus_driver_info max8688_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .pages = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .format[PSC_VOLTAGE_IN] = direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .format[PSC_VOLTAGE_OUT] = direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) .format[PSC_TEMPERATURE] = direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .format[PSC_CURRENT_OUT] = direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .m[PSC_VOLTAGE_IN] = 19995,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .b[PSC_VOLTAGE_IN] = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) .R[PSC_VOLTAGE_IN] = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .m[PSC_VOLTAGE_OUT] = 19995,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .b[PSC_VOLTAGE_OUT] = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .R[PSC_VOLTAGE_OUT] = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .m[PSC_CURRENT_OUT] = 23109,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .b[PSC_CURRENT_OUT] = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .R[PSC_CURRENT_OUT] = -2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .m[PSC_TEMPERATURE] = -7612,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) .b[PSC_TEMPERATURE] = 335,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .R[PSC_TEMPERATURE] = -3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_TEMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) | PMBUS_HAVE_STATUS_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .read_byte_data = max8688_read_byte_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .read_word_data = max8688_read_word_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .write_word_data = max8688_write_word_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static int max8688_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return pmbus_do_probe(client, &max8688_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static const struct i2c_device_id max8688_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {"max8688", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) MODULE_DEVICE_TABLE(i2c, max8688_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* This is the driver that will be inserted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static struct i2c_driver max8688_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .name = "max8688",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .probe_new = max8688_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .remove = pmbus_do_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) .id_table = max8688_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) module_i2c_driver(max8688_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) MODULE_AUTHOR("Guenter Roeck");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) MODULE_DESCRIPTION("PMBus driver for Maxim MAX8688");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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