Marvell 88q2xxx devices have an inbuilt temperature sensor. Add hwmon
support for this sensor.
Signed-off-by: Dimitri Fedrau <dima.fedrau@xxxxxxxxx>
---
drivers/net/phy/marvell-88q2xxx.c | 152 ++++++++++++++++++++++++++++++
1 file changed, 152 insertions(+)
diff --git a/drivers/net/phy/marvell-88q2xxx.c b/drivers/net/phy/marvell-88q2xxx.c
index 4cb8fe524795..6900bad275d0 100644
--- a/drivers/net/phy/marvell-88q2xxx.c
+++ b/drivers/net/phy/marvell-88q2xxx.c
@@ -5,6 +5,7 @@
#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)
@@ -33,6 +34,19 @@
#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_INT_THRESH_SHIFT 8
+#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
@@ -488,6 +502,143 @@ static int mv88q2xxx_resume(struct phy_device *phydev)
return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1,
MDIO_CTRL1_LPOWER);
}
+#ifdef 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;
+
+ *val = ((ret & MDIO_MMD_PCS_MV_TEMP_SENSOR3_MASK) - 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;
+
+ *val = (((ret & MDIO_MMD_PCS_MV_TEMP_SENSOR3_INT_THRESH_MASK) >>
+ MDIO_MMD_PCS_MV_TEMP_SENSOR3_INT_THRESH_SHIFT) - 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:
+ if (val < -75000 || val > 180000)
+ return -EINVAL;
+
+ val = ((val / 1000) + 75) <<
+ MDIO_MMD_PCS_MV_TEMP_SENSOR3_INT_THRESH_SHIFT;
+ 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 sensor interrupt */
+ ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS,
+ MDIO_MMD_PCS_MV_TEMP_SENSOR1,
+ MDIO_MMD_PCS_MV_TEMP_SENSOR1_INT_EN);
+ if (ret < 0)
+ return 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)
{
@@ -583,6 +734,7 @@ 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,
--
2.39.2
