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62e36b2441
Since c909e68f81 ("hwmon: (core) Use device name as a fallback in
devm_hwmon_device_register_with_info") we can simply provide NULL
as name argument.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/6e8d26f4-8d0a-4c83-aec3-378847a377eb@gmail.com
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* HWMON support for Realtek PHY's
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*
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* Author: Heiner Kallweit <hkallweit1@gmail.com>
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*/
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#include <linux/hwmon.h>
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#include <linux/phy.h>
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#include "realtek.h"
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#define RTL822X_VND2_TSALRM 0xa662
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#define RTL822X_VND2_TSRR 0xbd84
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#define RTL822X_VND2_TSSR 0xb54c
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static int rtl822x_hwmon_get_temp(int raw)
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{
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if (raw >= 512)
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raw -= 1024;
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return 1000 * raw / 2;
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}
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static int rtl822x_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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struct phy_device *phydev = dev_get_drvdata(dev);
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int raw;
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switch (attr) {
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case hwmon_temp_input:
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raw = phy_read_mmd(phydev, MDIO_MMD_VEND2, RTL822X_VND2_TSRR) & 0x3ff;
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*val = rtl822x_hwmon_get_temp(raw);
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break;
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case hwmon_temp_max:
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/* Chip reduces speed to 1G if threshold is exceeded */
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raw = phy_read_mmd(phydev, MDIO_MMD_VEND2, RTL822X_VND2_TSSR) >> 6;
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*val = rtl822x_hwmon_get_temp(raw);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static const struct hwmon_ops rtl822x_hwmon_ops = {
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.visible = 0444,
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.read = rtl822x_hwmon_read,
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};
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static const struct hwmon_channel_info * const rtl822x_hwmon_info[] = {
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HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX),
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NULL
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};
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static const struct hwmon_chip_info rtl822x_hwmon_chip_info = {
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.ops = &rtl822x_hwmon_ops,
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.info = rtl822x_hwmon_info,
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};
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int rtl822x_hwmon_init(struct phy_device *phydev)
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{
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struct device *hwdev, *dev = &phydev->mdio.dev;
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/* Ensure over-temp alarm is reset. */
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phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2, RTL822X_VND2_TSALRM, 3);
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hwdev = devm_hwmon_device_register_with_info(dev, NULL, phydev,
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&rtl822x_hwmon_chip_info,
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NULL);
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return PTR_ERR_OR_ZERO(hwdev);
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}
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