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470 lines
12 KiB
470 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/*************************************************************************** |
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* Copyright (C) 2010-2012 Hans de Goede <[email protected]> * |
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* * |
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***************************************************************************/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/jiffies.h> |
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#include <linux/platform_device.h> |
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#include <linux/hwmon.h> |
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#include <linux/err.h> |
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#include <linux/mutex.h> |
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#include "sch56xx-common.h" |
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#define DRVNAME "sch5627" |
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#define DEVNAME DRVNAME /* We only support one model */ |
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#define SCH5627_HWMON_ID 0xa5 |
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#define SCH5627_COMPANY_ID 0x5c |
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#define SCH5627_PRIMARY_ID 0xa0 |
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#define SCH5627_REG_BUILD_CODE 0x39 |
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#define SCH5627_REG_BUILD_ID 0x3a |
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#define SCH5627_REG_HWMON_ID 0x3c |
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#define SCH5627_REG_HWMON_REV 0x3d |
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#define SCH5627_REG_COMPANY_ID 0x3e |
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#define SCH5627_REG_PRIMARY_ID 0x3f |
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#define SCH5627_REG_CTRL 0x40 |
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#define SCH5627_NO_TEMPS 8 |
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#define SCH5627_NO_FANS 4 |
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#define SCH5627_NO_IN 5 |
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static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = { |
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0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 }; |
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static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = { |
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0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 }; |
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static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = { |
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0, 0, 1, 1, 0, 0, 0, 1 }; |
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static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = { |
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0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 }; |
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static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = { |
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0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 }; |
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static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = { |
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0x2C, 0x2E, 0x30, 0x32 }; |
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static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = { |
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0x62, 0x64, 0x66, 0x68 }; |
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static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = { |
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0x22, 0x23, 0x24, 0x25, 0x189 }; |
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static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = { |
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0xE4, 0xE4, 0xE3, 0xE3, 0x18A }; |
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static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = { |
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1, 0, 1, 0, 1 }; |
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static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = { |
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10745, 3660, 9765, 10745, 3660 }; |
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static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = { |
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"VCC", "VTT", "VBAT", "VTR", "V_IN" }; |
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struct sch5627_data { |
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unsigned short addr; |
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u8 control; |
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u8 temp_max[SCH5627_NO_TEMPS]; |
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u8 temp_crit[SCH5627_NO_TEMPS]; |
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u16 fan_min[SCH5627_NO_FANS]; |
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struct mutex update_lock; |
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unsigned long last_battery; /* In jiffies */ |
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char temp_valid; /* !=0 if following fields are valid */ |
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char fan_valid; |
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char in_valid; |
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unsigned long temp_last_updated; /* In jiffies */ |
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unsigned long fan_last_updated; |
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unsigned long in_last_updated; |
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u16 temp[SCH5627_NO_TEMPS]; |
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u16 fan[SCH5627_NO_FANS]; |
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u16 in[SCH5627_NO_IN]; |
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}; |
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static int sch5627_update_temp(struct sch5627_data *data) |
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{ |
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int ret = 0; |
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int i, val; |
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mutex_lock(&data->update_lock); |
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/* Cache the values for 1 second */ |
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if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) { |
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for (i = 0; i < SCH5627_NO_TEMPS; i++) { |
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val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i], |
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SCH5627_REG_TEMP_LSN[i], |
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SCH5627_REG_TEMP_HIGH_NIBBLE[i]); |
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if (unlikely(val < 0)) { |
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ret = val; |
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goto abort; |
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} |
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data->temp[i] = val; |
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} |
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data->temp_last_updated = jiffies; |
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data->temp_valid = 1; |
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} |
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abort: |
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mutex_unlock(&data->update_lock); |
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return ret; |
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} |
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static int sch5627_update_fan(struct sch5627_data *data) |
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{ |
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int ret = 0; |
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int i, val; |
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mutex_lock(&data->update_lock); |
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/* Cache the values for 1 second */ |
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if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) { |
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for (i = 0; i < SCH5627_NO_FANS; i++) { |
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val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]); |
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if (unlikely(val < 0)) { |
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ret = val; |
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goto abort; |
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} |
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data->fan[i] = val; |
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} |
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data->fan_last_updated = jiffies; |
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data->fan_valid = 1; |
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} |
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abort: |
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mutex_unlock(&data->update_lock); |
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return ret; |
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} |
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static int sch5627_update_in(struct sch5627_data *data) |
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{ |
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int ret = 0; |
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int i, val; |
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mutex_lock(&data->update_lock); |
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/* Trigger a Vbat voltage measurement every 5 minutes */ |
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if (time_after(jiffies, data->last_battery + 300 * HZ)) { |
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sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10); |
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data->last_battery = jiffies; |
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} |
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/* Cache the values for 1 second */ |
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if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) { |
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for (i = 0; i < SCH5627_NO_IN; i++) { |
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val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i], |
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SCH5627_REG_IN_LSN[i], |
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SCH5627_REG_IN_HIGH_NIBBLE[i]); |
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if (unlikely(val < 0)) { |
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ret = val; |
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goto abort; |
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} |
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data->in[i] = val; |
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} |
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data->in_last_updated = jiffies; |
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data->in_valid = 1; |
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} |
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abort: |
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mutex_unlock(&data->update_lock); |
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return ret; |
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} |
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static int sch5627_read_limits(struct sch5627_data *data) |
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{ |
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int i, val; |
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for (i = 0; i < SCH5627_NO_TEMPS; i++) { |
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/* |
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* Note what SMSC calls ABS, is what lm_sensors calls max |
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* (aka high), and HIGH is what lm_sensors calls crit. |
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*/ |
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val = sch56xx_read_virtual_reg(data->addr, |
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SCH5627_REG_TEMP_ABS[i]); |
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if (val < 0) |
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return val; |
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data->temp_max[i] = val; |
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val = sch56xx_read_virtual_reg(data->addr, |
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SCH5627_REG_TEMP_HIGH[i]); |
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if (val < 0) |
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return val; |
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data->temp_crit[i] = val; |
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} |
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for (i = 0; i < SCH5627_NO_FANS; i++) { |
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val = sch56xx_read_virtual_reg16(data->addr, |
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SCH5627_REG_FAN_MIN[i]); |
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if (val < 0) |
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return val; |
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data->fan_min[i] = val; |
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} |
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return 0; |
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} |
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static int reg_to_temp(u16 reg) |
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{ |
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return (reg * 625) / 10 - 64000; |
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} |
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static int reg_to_temp_limit(u8 reg) |
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{ |
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return (reg - 64) * 1000; |
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} |
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static int reg_to_rpm(u16 reg) |
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{ |
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if (reg == 0) |
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return -EIO; |
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if (reg == 0xffff) |
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return 0; |
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return 5400540 / reg; |
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} |
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static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, |
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int channel) |
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{ |
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return 0444; |
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} |
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static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, |
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long *val) |
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{ |
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struct sch5627_data *data = dev_get_drvdata(dev); |
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int ret; |
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switch (type) { |
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case hwmon_temp: |
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ret = sch5627_update_temp(data); |
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if (ret < 0) |
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return ret; |
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switch (attr) { |
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case hwmon_temp_input: |
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*val = reg_to_temp(data->temp[channel]); |
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return 0; |
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case hwmon_temp_max: |
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*val = reg_to_temp_limit(data->temp_max[channel]); |
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return 0; |
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case hwmon_temp_crit: |
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*val = reg_to_temp_limit(data->temp_crit[channel]); |
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return 0; |
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case hwmon_temp_fault: |
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*val = (data->temp[channel] == 0); |
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return 0; |
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default: |
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break; |
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} |
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break; |
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case hwmon_fan: |
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ret = sch5627_update_fan(data); |
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if (ret < 0) |
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return ret; |
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switch (attr) { |
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case hwmon_fan_input: |
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ret = reg_to_rpm(data->fan[channel]); |
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if (ret < 0) |
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return ret; |
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*val = ret; |
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return 0; |
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case hwmon_fan_min: |
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ret = reg_to_rpm(data->fan_min[channel]); |
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if (ret < 0) |
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return ret; |
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*val = ret; |
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return 0; |
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case hwmon_fan_fault: |
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*val = (data->fan[channel] == 0xffff); |
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return 0; |
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default: |
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break; |
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} |
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break; |
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case hwmon_in: |
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ret = sch5627_update_in(data); |
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if (ret < 0) |
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return ret; |
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switch (attr) { |
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case hwmon_in_input: |
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*val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel], |
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10000); |
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return 0; |
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default: |
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break; |
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} |
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break; |
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default: |
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break; |
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} |
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return -EOPNOTSUPP; |
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} |
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static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, |
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int channel, const char **str) |
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{ |
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switch (type) { |
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case hwmon_in: |
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switch (attr) { |
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case hwmon_in_label: |
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*str = SCH5627_IN_LABELS[channel]; |
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return 0; |
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default: |
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break; |
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} |
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break; |
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default: |
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break; |
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} |
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return -EOPNOTSUPP; |
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} |
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static const struct hwmon_ops sch5627_ops = { |
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.is_visible = sch5627_is_visible, |
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.read = sch5627_read, |
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.read_string = sch5627_read_string, |
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}; |
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static const struct hwmon_channel_info *sch5627_info[] = { |
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HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), |
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HWMON_CHANNEL_INFO(temp, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT |
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), |
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HWMON_CHANNEL_INFO(fan, |
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HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT, |
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HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT, |
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HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT, |
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HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT |
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), |
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HWMON_CHANNEL_INFO(in, |
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HWMON_I_INPUT | HWMON_I_LABEL, |
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HWMON_I_INPUT | HWMON_I_LABEL, |
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HWMON_I_INPUT | HWMON_I_LABEL, |
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HWMON_I_INPUT | HWMON_I_LABEL, |
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HWMON_I_INPUT |
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), |
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NULL |
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}; |
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static const struct hwmon_chip_info sch5627_chip_info = { |
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.ops = &sch5627_ops, |
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.info = sch5627_info, |
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}; |
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static int sch5627_probe(struct platform_device *pdev) |
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{ |
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struct sch5627_data *data; |
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struct device *hwmon_dev; |
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int err, build_code, build_id, hwmon_rev, val; |
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data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data), |
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GFP_KERNEL); |
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if (!data) |
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return -ENOMEM; |
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data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; |
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mutex_init(&data->update_lock); |
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platform_set_drvdata(pdev, data); |
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val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID); |
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if (val < 0) |
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return val; |
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if (val != SCH5627_HWMON_ID) { |
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pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon", |
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val, SCH5627_HWMON_ID); |
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return -ENODEV; |
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} |
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val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID); |
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if (val < 0) |
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return val; |
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if (val != SCH5627_COMPANY_ID) { |
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pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company", |
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val, SCH5627_COMPANY_ID); |
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return -ENODEV; |
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} |
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val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID); |
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if (val < 0) |
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return val; |
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if (val != SCH5627_PRIMARY_ID) { |
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pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary", |
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val, SCH5627_PRIMARY_ID); |
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return -ENODEV; |
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} |
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build_code = sch56xx_read_virtual_reg(data->addr, |
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SCH5627_REG_BUILD_CODE); |
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if (build_code < 0) |
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return build_code; |
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build_id = sch56xx_read_virtual_reg16(data->addr, |
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SCH5627_REG_BUILD_ID); |
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if (build_id < 0) |
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return build_id; |
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hwmon_rev = sch56xx_read_virtual_reg(data->addr, |
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SCH5627_REG_HWMON_REV); |
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if (hwmon_rev < 0) |
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return hwmon_rev; |
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val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL); |
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if (val < 0) |
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return val; |
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data->control = val; |
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if (!(data->control & 0x01)) { |
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pr_err("hardware monitoring not enabled\n"); |
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return -ENODEV; |
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} |
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/* Trigger a Vbat voltage measurement, so that we get a valid reading |
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the first time we read Vbat */ |
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sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, |
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data->control | 0x10); |
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data->last_battery = jiffies; |
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/* |
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* Read limits, we do this only once as reading a register on |
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* the sch5627 is quite expensive (and they don't change). |
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*/ |
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err = sch5627_read_limits(data); |
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if (err) |
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return err; |
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pr_info("found %s chip at %#hx\n", DEVNAME, data->addr); |
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pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n", |
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build_code, build_id, hwmon_rev); |
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hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data, |
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&sch5627_chip_info, NULL); |
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if (IS_ERR(hwmon_dev)) |
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return PTR_ERR(hwmon_dev); |
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/* Note failing to register the watchdog is not a fatal error */ |
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sch56xx_watchdog_register(&pdev->dev, data->addr, |
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(build_code << 24) | (build_id << 8) | hwmon_rev, |
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&data->update_lock, 1); |
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return 0; |
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} |
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static struct platform_driver sch5627_driver = { |
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.driver = { |
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.name = DRVNAME, |
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}, |
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.probe = sch5627_probe, |
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}; |
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module_platform_driver(sch5627_driver); |
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MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver"); |
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MODULE_AUTHOR("Hans de Goede <[email protected]>"); |
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MODULE_LICENSE("GPL");
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