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net: phy: marvell-88q2xxx: add support for temperature sensor 

Marvell 88q2xxx devices have an inbuilt temperature sensor. Add hwmon
support for this sensor.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Dimitri Fedrau <dima.fedrau@gmail.com>
Link: https://lore.kernel.org/r/20240218075753.18067-9-dima.fedrau@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Dimitri Fedrau 2024-02-18 08:57:45 +01:00 committed by Jakub Kicinski
parent 5f9f361a3d
commit a557a92e68
2 changed files with 147 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/phy/Kconfig
View File

@ -232,6 +232,7 @@ config MARVELL_10G_PHY
config MARVELL_88Q2XXX_PHY
tristate "Marvell 88Q2XXX PHY"
depends on HWMON || HWMON=n
help
Support for the Marvell 88Q2XXX 100/1000BASE-T1 Automotive Ethernet
PHYs.

146
drivers/net/phy/marvell-88q2xxx.c
View File

@ -9,6 +9,7 @@
#include <linux/ethtool_netlink.h>
#include <linux/marvell_phy.h>
#include <linux/phy.h>
#include <linux/hwmon.h>
#define PHY_ID_88Q2220_REVB0 (MARVELL_PHY_ID_88Q2220 | 0x1)
@ -37,6 +38,18 @@
#define MDIO_MMD_PCS_MV_GPIO_INT_CTRL 32787
#define MDIO_MMD_PCS_MV_GPIO_INT_CTRL_TRI_DIS 0x0800
#define MDIO_MMD_PCS_MV_TEMP_SENSOR1 32833
#define MDIO_MMD_PCS_MV_TEMP_SENSOR1_RAW_INT 0x0001
#define MDIO_MMD_PCS_MV_TEMP_SENSOR1_INT 0x0040
#define MDIO_MMD_PCS_MV_TEMP_SENSOR1_INT_EN 0x0080
#define MDIO_MMD_PCS_MV_TEMP_SENSOR2 32834
#define MDIO_MMD_PCS_MV_TEMP_SENSOR2_DIS_MASK 0xc000
#define MDIO_MMD_PCS_MV_TEMP_SENSOR3 32835
#define MDIO_MMD_PCS_MV_TEMP_SENSOR3_INT_THRESH_MASK 0xff00
#define MDIO_MMD_PCS_MV_TEMP_SENSOR3_MASK 0x00ff
#define MDIO_MMD_PCS_MV_100BT1_STAT1 33032
#define MDIO_MMD_PCS_MV_100BT1_STAT1_IDLE_ERROR 0x00ff
#define MDIO_MMD_PCS_MV_100BT1_STAT1_JABBER 0x0100
@ -493,6 +506,138 @@ static int mv88q2xxx_resume(struct phy_device *phydev)
MDIO_CTRL1_LPOWER);
}
#if IS_ENABLED(CONFIG_HWMON)
static const struct hwmon_channel_info * const mv88q2xxx_hwmon_info[] = {
HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_ALARM),
NULL
};
static umode_t mv88q2xxx_hwmon_is_visible(const void *data,
enum hwmon_sensor_types type,
u32 attr, int channel)
{
switch (attr) {
case hwmon_temp_input:
return 0444;
case hwmon_temp_max:
return 0644;
case hwmon_temp_alarm:
return 0444;
default:
return 0;
}
}
static int mv88q2xxx_hwmon_read(struct device *dev,
enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct phy_device *phydev = dev_get_drvdata(dev);
int ret;
switch (attr) {
case hwmon_temp_input:
ret = phy_read_mmd(phydev, MDIO_MMD_PCS,
MDIO_MMD_PCS_MV_TEMP_SENSOR3);
if (ret < 0)
return ret;
ret = FIELD_GET(MDIO_MMD_PCS_MV_TEMP_SENSOR3_MASK, ret);
*val = (ret - 75) * 1000;
return 0;
case hwmon_temp_max:
ret = phy_read_mmd(phydev, MDIO_MMD_PCS,
MDIO_MMD_PCS_MV_TEMP_SENSOR3);
if (ret < 0)
return ret;
ret = FIELD_GET(MDIO_MMD_PCS_MV_TEMP_SENSOR3_INT_THRESH_MASK,
ret);
*val = (ret - 75) * 1000;
return 0;
case hwmon_temp_alarm:
ret = phy_read_mmd(phydev, MDIO_MMD_PCS,
MDIO_MMD_PCS_MV_TEMP_SENSOR1);
if (ret < 0)
return ret;
*val = !!(ret & MDIO_MMD_PCS_MV_TEMP_SENSOR1_RAW_INT);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int mv88q2xxx_hwmon_write(struct device *dev,
enum hwmon_sensor_types type, u32 attr,
int channel, long val)
{
struct phy_device *phydev = dev_get_drvdata(dev);
switch (attr) {
case hwmon_temp_max:
clamp_val(val, -75000, 180000);
val = (val / 1000) + 75;
val = FIELD_PREP(MDIO_MMD_PCS_MV_TEMP_SENSOR3_INT_THRESH_MASK,
val);
return phy_modify_mmd(phydev, MDIO_MMD_PCS,
MDIO_MMD_PCS_MV_TEMP_SENSOR3,
MDIO_MMD_PCS_MV_TEMP_SENSOR3_INT_THRESH_MASK,
val);
default:
return -EOPNOTSUPP;
}
}
static const struct hwmon_ops mv88q2xxx_hwmon_hwmon_ops = {
.is_visible = mv88q2xxx_hwmon_is_visible,
.read = mv88q2xxx_hwmon_read,
.write = mv88q2xxx_hwmon_write,
};
static const struct hwmon_chip_info mv88q2xxx_hwmon_chip_info = {
.ops = &mv88q2xxx_hwmon_hwmon_ops,
.info = mv88q2xxx_hwmon_info,
};
static int mv88q2xxx_hwmon_probe(struct phy_device *phydev)
{
struct device *dev = &phydev->mdio.dev;
struct device *hwmon;
char *hwmon_name;
int ret;
/* Enable temperature sense */
ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, MDIO_MMD_PCS_MV_TEMP_SENSOR2,
MDIO_MMD_PCS_MV_TEMP_SENSOR2_DIS_MASK, 0);
if (ret < 0)
return ret;
hwmon_name = devm_hwmon_sanitize_name(dev, dev_name(dev));
if (IS_ERR(hwmon_name))
return PTR_ERR(hwmon_name);
hwmon = devm_hwmon_device_register_with_info(dev,
hwmon_name,
phydev,
&mv88q2xxx_hwmon_chip_info,
NULL);
return PTR_ERR_OR_ZERO(hwmon);
}
#else
static int mv88q2xxx_hwmon_probe(struct phy_device *phydev)
{
return 0;
}
#endif
static int mv88q2xxx_probe(struct phy_device *phydev)
{
return mv88q2xxx_hwmon_probe(phydev);
}
static int mv88q222x_soft_reset(struct phy_device *phydev)
{
int ret;
@ -587,6 +732,7 @@ static struct phy_driver mv88q2xxx_driver[] = {
{
PHY_ID_MATCH_EXACT(PHY_ID_88Q2220_REVB0),
.name = "mv88q2220",
.probe = mv88q2xxx_probe,
.get_features = mv88q2xxx_get_features,
.config_aneg = mv88q222x_config_aneg,
.aneg_done = genphy_c45_aneg_done,