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Message-ID: <47178fa9-1065-87f8-bcfa-59d8764d21f8@gmail.com>
Date: Mon, 25 Feb 2019 19:56:38 +0100
From: Heiner Kallweit <hkallweit1@...il.com>
To: Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
David Miller <davem@...emloft.net>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next v3 2/2] net: phy: aquantia: add hwmon support
This adds HWMON support for the temperature sensor and the related
alarms on the 107/108/109 chips. This patch is based on work from
Nikita and Andrew. I added:
- support for changing alarm thresholds via sysfs
- move HWMON code to a separate source file to improve maintainability
- smaller changes like using IS_REACHABLE instead of ifdef
(avoids problems if PHY driver is built in and HWMON is a module)
v2:
- remove struct aqr_priv
- rename header file to aquantia.h
v3:
- add conditional compiling of aquantia_hwmon.c
- improve converting sensor register values to/from long
- add helper aqr_hwmon_test_bit
Signed-off-by: Nikita Yushchenko <nikita.yoush@...entembedded.com>
Signed-off-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
drivers/net/phy/Makefile | 3 +
drivers/net/phy/aquantia.h | 16 ++
drivers/net/phy/aquantia_hwmon.c | 250 +++++++++++++++++++++++++++++++
drivers/net/phy/aquantia_main.c | 4 +
4 files changed, 273 insertions(+)
create mode 100644 drivers/net/phy/aquantia.h
create mode 100644 drivers/net/phy/aquantia_hwmon.c
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index b0845adaf..73e9670ef 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -46,6 +46,9 @@ obj-y += $(sfp-obj-y) $(sfp-obj-m)
obj-$(CONFIG_AMD_PHY) += amd.o
aquantia-objs += aquantia_main.o
+ifdef CONFIG_HWMON
+aquantia-objs += aquantia_hwmon.o
+endif
obj-$(CONFIG_AQUANTIA_PHY) += aquantia.o
obj-$(CONFIG_ASIX_PHY) += asix.o
obj-$(CONFIG_AT803X_PHY) += at803x.o
diff --git a/drivers/net/phy/aquantia.h b/drivers/net/phy/aquantia.h
new file mode 100644
index 000000000..5a16caab7
--- /dev/null
+++ b/drivers/net/phy/aquantia.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * HWMON driver for Aquantia PHY
+ *
+ * Author: Nikita Yushchenko <nikita.yoush@...entembedded.com>
+ * Author: Andrew Lunn <andrew@...n.ch>
+ * Author: Heiner Kallweit <hkallweit1@...il.com>
+ */
+
+#include <linux/device.h>
+#include <linux/phy.h>
+
+#if IS_REACHABLE(CONFIG_HWMON)
+int aqr_hwmon_probe(struct phy_device *phydev);
+#else
+static inline int aqr_hwmon_probe(struct phy_device *phydev) { return 0; }
+#endif
diff --git a/drivers/net/phy/aquantia_hwmon.c b/drivers/net/phy/aquantia_hwmon.c
new file mode 100644
index 000000000..19c4c280a
--- /dev/null
+++ b/drivers/net/phy/aquantia_hwmon.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0
+/* HWMON driver for Aquantia PHY
+ *
+ * Author: Nikita Yushchenko <nikita.yoush@...entembedded.com>
+ * Author: Andrew Lunn <andrew@...n.ch>
+ * Author: Heiner Kallweit <hkallweit1@...il.com>
+ */
+
+#include <linux/phy.h>
+#include <linux/device.h>
+#include <linux/ctype.h>
+#include <linux/hwmon.h>
+
+#include "aquantia.h"
+
+/* Vendor specific 1, MDIO_MMD_VEND2 */
+#define VEND1_THERMAL_PROV_HIGH_TEMP_FAIL 0xc421
+#define VEND1_THERMAL_PROV_LOW_TEMP_FAIL 0xc422
+#define VEND1_THERMAL_PROV_HIGH_TEMP_WARN 0xc423
+#define VEND1_THERMAL_PROV_LOW_TEMP_WARN 0xc424
+#define VEND1_THERMAL_STAT1 0xc820
+#define VEND1_THERMAL_STAT2 0xc821
+#define VEND1_THERMAL_STAT2_VALID BIT(0)
+#define VEND1_GENERAL_STAT1 0xc830
+#define VEND1_GENERAL_STAT1_HIGH_TEMP_FAIL BIT(14)
+#define VEND1_GENERAL_STAT1_LOW_TEMP_FAIL BIT(13)
+#define VEND1_GENERAL_STAT1_HIGH_TEMP_WARN BIT(12)
+#define VEND1_GENERAL_STAT1_LOW_TEMP_WARN BIT(11)
+
+#if IS_REACHABLE(CONFIG_HWMON)
+
+static umode_t aqr_hwmon_is_visible(const void *data,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ if (type != hwmon_temp)
+ return 0;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ case hwmon_temp_min_alarm:
+ case hwmon_temp_max_alarm:
+ case hwmon_temp_lcrit_alarm:
+ case hwmon_temp_crit_alarm:
+ return 0444;
+ case hwmon_temp_min:
+ case hwmon_temp_max:
+ case hwmon_temp_lcrit:
+ case hwmon_temp_crit:
+ return 0644;
+ default:
+ return 0;
+ }
+}
+
+static int aqr_hwmon_get(struct phy_device *phydev, int reg, long *value)
+{
+ int temp = phy_read_mmd(phydev, MDIO_MMD_VEND1, reg);
+
+ if (temp < 0)
+ return temp;
+
+ /* 16 bit value is 2's complement with LSB = 1/256th degree Celsius */
+ *value = (s16)temp * 1000 / 256;
+
+ return 0;
+}
+
+static int aqr_hwmon_set(struct phy_device *phydev, int reg, long value)
+{
+ int temp;
+
+ if (value >= 128000 || value < -128000)
+ return -ERANGE;
+
+ temp = value * 256 / 1000;
+
+ /* temp is in s16 range and we're interested in lower 16 bits only */
+ return phy_write_mmd(phydev, MDIO_MMD_VEND1, reg, (u16)temp);
+}
+
+static int aqr_hwmon_test_bit(struct phy_device *phydev, int reg, int bit)
+{
+ int val = phy_read_mmd(phydev, MDIO_MMD_VEND1, reg);
+
+ if (val < 0)
+ return val;
+
+ return !!(val & bit);
+}
+
+static int aqr_hwmon_status1(struct phy_device *phydev, int bit, long *value)
+{
+ int val = aqr_hwmon_test_bit(phydev, VEND1_GENERAL_STAT1, bit);
+
+ if (val < 0)
+ return val;
+
+ *value = val;
+
+ return 0;
+}
+
+static int aqr_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *value)
+{
+ struct phy_device *phydev = dev_get_drvdata(dev);
+ int reg;
+
+ if (type != hwmon_temp)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ reg = aqr_hwmon_test_bit(phydev, VEND1_THERMAL_STAT2,
+ VEND1_THERMAL_STAT2_VALID);
+ if (reg < 0)
+ return reg;
+ if (!reg)
+ return -EBUSY;
+
+ return aqr_hwmon_get(phydev, VEND1_THERMAL_STAT1, value);
+
+ case hwmon_temp_lcrit:
+ return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_LOW_TEMP_FAIL,
+ value);
+ case hwmon_temp_min:
+ return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_LOW_TEMP_WARN,
+ value);
+ case hwmon_temp_max:
+ return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_WARN,
+ value);
+ case hwmon_temp_crit:
+ return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_FAIL,
+ value);
+ case hwmon_temp_lcrit_alarm:
+ return aqr_hwmon_status1(phydev,
+ VEND1_GENERAL_STAT1_LOW_TEMP_FAIL,
+ value);
+ case hwmon_temp_min_alarm:
+ return aqr_hwmon_status1(phydev,
+ VEND1_GENERAL_STAT1_LOW_TEMP_WARN,
+ value);
+ case hwmon_temp_max_alarm:
+ return aqr_hwmon_status1(phydev,
+ VEND1_GENERAL_STAT1_HIGH_TEMP_WARN,
+ value);
+ case hwmon_temp_crit_alarm:
+ return aqr_hwmon_status1(phydev,
+ VEND1_GENERAL_STAT1_HIGH_TEMP_FAIL,
+ value);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int aqr_hwmon_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long value)
+{
+ struct phy_device *phydev = dev_get_drvdata(dev);
+
+ if (type != hwmon_temp)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_temp_lcrit:
+ return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_LOW_TEMP_FAIL,
+ value);
+ case hwmon_temp_min:
+ return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_LOW_TEMP_WARN,
+ value);
+ case hwmon_temp_max:
+ return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_WARN,
+ value);
+ case hwmon_temp_crit:
+ return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_FAIL,
+ value);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static const struct hwmon_ops aqr_hwmon_ops = {
+ .is_visible = aqr_hwmon_is_visible,
+ .read = aqr_hwmon_read,
+ .write = aqr_hwmon_write,
+};
+
+static u32 aqr_hwmon_chip_config[] = {
+ HWMON_C_REGISTER_TZ,
+ 0,
+};
+
+static const struct hwmon_channel_info aqr_hwmon_chip = {
+ .type = hwmon_chip,
+ .config = aqr_hwmon_chip_config,
+};
+
+static u32 aqr_hwmon_temp_config[] = {
+ HWMON_T_INPUT |
+ HWMON_T_MAX | HWMON_T_MIN |
+ HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM |
+ HWMON_T_CRIT | HWMON_T_LCRIT |
+ HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM,
+ 0,
+};
+
+static const struct hwmon_channel_info aqr_hwmon_temp = {
+ .type = hwmon_temp,
+ .config = aqr_hwmon_temp_config,
+};
+
+static const struct hwmon_channel_info *aqr_hwmon_info[] = {
+ &aqr_hwmon_chip,
+ &aqr_hwmon_temp,
+ NULL,
+};
+
+static const struct hwmon_chip_info aqr_hwmon_chip_info = {
+ .ops = &aqr_hwmon_ops,
+ .info = aqr_hwmon_info,
+};
+
+int aqr_hwmon_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct device *hwmon_dev;
+ char *hwmon_name;
+ int i, j;
+
+ hwmon_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);
+ if (!hwmon_name)
+ return -ENOMEM;
+
+ for (i = j = 0; hwmon_name[i]; i++) {
+ if (isalnum(hwmon_name[i])) {
+ if (i != j)
+ hwmon_name[j] = hwmon_name[i];
+ j++;
+ }
+ }
+ hwmon_name[j] = '\0';
+
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, hwmon_name,
+ phydev, &aqr_hwmon_chip_info, NULL);
+
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+#endif
diff --git a/drivers/net/phy/aquantia_main.c b/drivers/net/phy/aquantia_main.c
index 0f0eb5682..37218e5d7 100644
--- a/drivers/net/phy/aquantia_main.c
+++ b/drivers/net/phy/aquantia_main.c
@@ -12,6 +12,8 @@
#include <linux/delay.h>
#include <linux/phy.h>
+#include "aquantia.h"
+
#define PHY_ID_AQ1202 0x03a1b445
#define PHY_ID_AQ2104 0x03a1b460
#define PHY_ID_AQR105 0x03a1b4a2
@@ -231,6 +233,7 @@ static struct phy_driver aqr_driver[] = {
.name = "Aquantia AQR107",
.aneg_done = genphy_c45_aneg_done,
.get_features = genphy_c45_pma_read_abilities,
+ .probe = aqr_hwmon_probe,
.config_aneg = aqr_config_aneg,
.config_intr = aqr_config_intr,
.ack_interrupt = aqr_ack_interrupt,
@@ -241,6 +244,7 @@ static struct phy_driver aqr_driver[] = {
.name = "Aquantia AQCS109",
.aneg_done = genphy_c45_aneg_done,
.get_features = genphy_c45_pma_read_abilities,
+ .probe = aqr_hwmon_probe,
.config_init = aqcs109_config_init,
.config_aneg = aqr_config_aneg,
.config_intr = aqr_config_intr,
--
2.20.1
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