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net: phy: bcm54140: add hwmon support
The PHY supports monitoring its die temperature as well as two analog voltages. Add support for it. Signed-off-by: Michael Walle <michael@walle.cc> Acked-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Walle
David S. Miller
parent
6937602ed3
commit
4406d36dfd
45
Documentation/hwmon/bcm54140.rst
Normal file
45
Documentation/hwmon/bcm54140.rst
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@ -0,0 +1,45 @@
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.. SPDX-License-Identifier: GPL-2.0-only
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Broadcom BCM54140 Quad SGMII/QSGMII PHY
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=======================================
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Supported chips:
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* Broadcom BCM54140
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Datasheet: not public
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Author: Michael Walle <michael@walle.cc>
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Description
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-----------
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The Broadcom BCM54140 is a Quad SGMII/QSGMII PHY which supports monitoring
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its die temperature as well as two analog voltages.
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The AVDDL is a 1.0V analogue voltage, the AVDDH is a 3.3V analogue voltage.
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Both voltages and the temperature are measured in a round-robin fashion.
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Sysfs entries
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-------------
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The following attributes are supported.
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======================= ========================================================
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in0_label "AVDDL"
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in0_input Measured AVDDL voltage.
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in0_min Minimum AVDDL voltage.
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in0_max Maximum AVDDL voltage.
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in0_alarm AVDDL voltage alarm.
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in1_label "AVDDH"
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in1_input Measured AVDDH voltage.
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in1_min Minimum AVDDH voltage.
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in1_max Maximum AVDDH voltage.
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in1_alarm AVDDH voltage alarm.
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temp1_input Die temperature.
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temp1_min Minimum die temperature.
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temp1_max Maximum die temperature.
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temp1_alarm Die temperature alarm.
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======================= ========================================================
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@ -42,6 +42,7 @@ Hardware Monitoring Kernel Drivers
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asb100
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asc7621
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aspeed-pwm-tacho
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bcm54140
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bel-pfe
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coretemp
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da9052
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@ -349,6 +349,7 @@ config BROADCOM_PHY
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config BCM54140_PHY
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tristate "Broadcom BCM54140 PHY"
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depends on PHYLIB
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depends on HWMON || HWMON=n
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select BCM_NET_PHYLIB
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help
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Support the Broadcom BCM54140 Quad SGMII/QSGMII PHY.
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@ -6,6 +6,7 @@
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#include <linux/bitfield.h>
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#include <linux/brcmphy.h>
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#include <linux/hwmon.h>
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#include <linux/module.h>
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#include <linux/phy.h>
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@ -50,6 +51,69 @@
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#define BCM54140_RDB_TOP_IMR_PORT1 BIT(5)
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#define BCM54140_RDB_TOP_IMR_PORT2 BIT(6)
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#define BCM54140_RDB_TOP_IMR_PORT3 BIT(7)
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#define BCM54140_RDB_MON_CTRL 0x831 /* monitor control */
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#define BCM54140_RDB_MON_CTRL_V_MODE BIT(3) /* voltage mode */
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#define BCM54140_RDB_MON_CTRL_SEL_MASK GENMASK(2, 1)
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#define BCM54140_RDB_MON_CTRL_SEL_TEMP 0 /* meassure temperature */
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#define BCM54140_RDB_MON_CTRL_SEL_1V0 1 /* meassure AVDDL 1.0V */
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#define BCM54140_RDB_MON_CTRL_SEL_3V3 2 /* meassure AVDDH 3.3V */
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#define BCM54140_RDB_MON_CTRL_SEL_RR 3 /* meassure all round-robin */
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#define BCM54140_RDB_MON_CTRL_PWR_DOWN BIT(0) /* power-down monitor */
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#define BCM54140_RDB_MON_TEMP_VAL 0x832 /* temperature value */
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#define BCM54140_RDB_MON_TEMP_MAX 0x833 /* temperature high thresh */
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#define BCM54140_RDB_MON_TEMP_MIN 0x834 /* temperature low thresh */
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#define BCM54140_RDB_MON_TEMP_DATA_MASK GENMASK(9, 0)
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#define BCM54140_RDB_MON_1V0_VAL 0x835 /* AVDDL 1.0V value */
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#define BCM54140_RDB_MON_1V0_MAX 0x836 /* AVDDL 1.0V high thresh */
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#define BCM54140_RDB_MON_1V0_MIN 0x837 /* AVDDL 1.0V low thresh */
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#define BCM54140_RDB_MON_1V0_DATA_MASK GENMASK(10, 0)
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#define BCM54140_RDB_MON_3V3_VAL 0x838 /* AVDDH 3.3V value */
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#define BCM54140_RDB_MON_3V3_MAX 0x839 /* AVDDH 3.3V high thresh */
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#define BCM54140_RDB_MON_3V3_MIN 0x83a /* AVDDH 3.3V low thresh */
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#define BCM54140_RDB_MON_3V3_DATA_MASK GENMASK(11, 0)
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#define BCM54140_RDB_MON_ISR 0x83b /* interrupt status */
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#define BCM54140_RDB_MON_ISR_3V3 BIT(2) /* AVDDH 3.3V alarm */
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#define BCM54140_RDB_MON_ISR_1V0 BIT(1) /* AVDDL 1.0V alarm */
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#define BCM54140_RDB_MON_ISR_TEMP BIT(0) /* temperature alarm */
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/* According to the datasheet the formula is:
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* T = 413.35 - (0.49055 * bits[9:0])
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*/
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#define BCM54140_HWMON_TO_TEMP(v) (413350L - (v) * 491)
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#define BCM54140_HWMON_FROM_TEMP(v) DIV_ROUND_CLOSEST_ULL(413350L - (v), 491)
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/* According to the datasheet the formula is:
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* U = bits[11:0] / 1024 * 220 / 0.2
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*
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* Normalized:
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* U = bits[11:0] / 4096 * 2514
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*/
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#define BCM54140_HWMON_TO_IN_1V0(v) ((v) * 2514 >> 11)
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#define BCM54140_HWMON_FROM_IN_1V0(v) DIV_ROUND_CLOSEST_ULL(((v) << 11), 2514)
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/* According to the datasheet the formula is:
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* U = bits[10:0] / 1024 * 880 / 0.7
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*
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* Normalized:
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* U = bits[10:0] / 2048 * 4400
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*/
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#define BCM54140_HWMON_TO_IN_3V3(v) ((v) * 4400 >> 12)
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#define BCM54140_HWMON_FROM_IN_3V3(v) DIV_ROUND_CLOSEST_ULL(((v) << 12), 4400)
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#define BCM54140_HWMON_TO_IN(ch, v) ((ch) ? BCM54140_HWMON_TO_IN_3V3(v) \
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: BCM54140_HWMON_TO_IN_1V0(v))
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#define BCM54140_HWMON_FROM_IN(ch, v) ((ch) ? BCM54140_HWMON_FROM_IN_3V3(v) \
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: BCM54140_HWMON_FROM_IN_1V0(v))
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#define BCM54140_HWMON_IN_MASK(ch) ((ch) ? BCM54140_RDB_MON_3V3_DATA_MASK \
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: BCM54140_RDB_MON_1V0_DATA_MASK)
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#define BCM54140_HWMON_IN_VAL_REG(ch) ((ch) ? BCM54140_RDB_MON_3V3_VAL \
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: BCM54140_RDB_MON_1V0_VAL)
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#define BCM54140_HWMON_IN_MIN_REG(ch) ((ch) ? BCM54140_RDB_MON_3V3_MIN \
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: BCM54140_RDB_MON_1V0_MIN)
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#define BCM54140_HWMON_IN_MAX_REG(ch) ((ch) ? BCM54140_RDB_MON_3V3_MAX \
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: BCM54140_RDB_MON_1V0_MAX)
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#define BCM54140_HWMON_IN_ALARM_BIT(ch) ((ch) ? BCM54140_RDB_MON_ISR_3V3 \
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: BCM54140_RDB_MON_ISR_1V0)
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#define BCM54140_DEFAULT_DOWNSHIFT 5
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#define BCM54140_MAX_DOWNSHIFT 9
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@ -57,8 +121,328 @@
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struct bcm54140_priv {
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int port;
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int base_addr;
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#if IS_ENABLED(CONFIG_HWMON)
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bool pkg_init;
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/* protect the alarm bits */
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struct mutex alarm_lock;
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u16 alarm;
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#endif
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};
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#if IS_ENABLED(CONFIG_HWMON)
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static umode_t bcm54140_hwmon_is_visible(const void *data,
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enum hwmon_sensor_types type,
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u32 attr, int channel)
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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_min:
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case hwmon_in_max:
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return 0644;
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case hwmon_in_label:
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case hwmon_in_input:
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case hwmon_in_alarm:
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return 0444;
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default:
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return 0;
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}
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case hwmon_temp:
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switch (attr) {
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case hwmon_temp_min:
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case hwmon_temp_max:
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return 0644;
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case hwmon_temp_input:
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case hwmon_temp_alarm:
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return 0444;
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default:
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return 0;
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}
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default:
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return 0;
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}
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}
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static int bcm54140_hwmon_read_alarm(struct device *dev, unsigned int bit,
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long *val)
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{
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struct phy_device *phydev = dev_get_drvdata(dev);
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struct bcm54140_priv *priv = phydev->priv;
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int tmp, ret = 0;
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mutex_lock(&priv->alarm_lock);
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/* latch any alarm bits */
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tmp = bcm_phy_read_rdb(phydev, BCM54140_RDB_MON_ISR);
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if (tmp < 0) {
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ret = tmp;
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goto out;
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}
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priv->alarm |= tmp;
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*val = !!(priv->alarm & bit);
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priv->alarm &= ~bit;
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out:
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mutex_unlock(&priv->alarm_lock);
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return ret;
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}
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static int bcm54140_hwmon_read_temp(struct device *dev, u32 attr, long *val)
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{
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struct phy_device *phydev = dev_get_drvdata(dev);
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u16 reg, tmp;
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switch (attr) {
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case hwmon_temp_input:
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reg = BCM54140_RDB_MON_TEMP_VAL;
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break;
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case hwmon_temp_min:
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reg = BCM54140_RDB_MON_TEMP_MIN;
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break;
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case hwmon_temp_max:
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reg = BCM54140_RDB_MON_TEMP_MAX;
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break;
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case hwmon_temp_alarm:
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return bcm54140_hwmon_read_alarm(dev,
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BCM54140_RDB_MON_ISR_TEMP,
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val);
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default:
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return -EOPNOTSUPP;
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}
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tmp = bcm_phy_read_rdb(phydev, reg);
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if (tmp < 0)
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return tmp;
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*val = BCM54140_HWMON_TO_TEMP(tmp & BCM54140_RDB_MON_TEMP_DATA_MASK);
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return 0;
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}
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static int bcm54140_hwmon_read_in(struct device *dev, u32 attr,
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int channel, long *val)
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{
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struct phy_device *phydev = dev_get_drvdata(dev);
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u16 bit, reg, tmp;
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switch (attr) {
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case hwmon_in_input:
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reg = BCM54140_HWMON_IN_VAL_REG(channel);
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break;
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case hwmon_in_min:
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reg = BCM54140_HWMON_IN_MIN_REG(channel);
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break;
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case hwmon_in_max:
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reg = BCM54140_HWMON_IN_MAX_REG(channel);
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break;
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case hwmon_in_alarm:
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bit = BCM54140_HWMON_IN_ALARM_BIT(channel);
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return bcm54140_hwmon_read_alarm(dev, bit, val);
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default:
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return -EOPNOTSUPP;
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}
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tmp = bcm_phy_read_rdb(phydev, reg);
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if (tmp < 0)
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return tmp;
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tmp &= BCM54140_HWMON_IN_MASK(channel);
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*val = BCM54140_HWMON_TO_IN(channel, tmp);
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return 0;
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}
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static int bcm54140_hwmon_read(struct device *dev,
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enum hwmon_sensor_types type, u32 attr,
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int channel, long *val)
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{
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switch (type) {
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case hwmon_temp:
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return bcm54140_hwmon_read_temp(dev, attr, val);
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case hwmon_in:
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return bcm54140_hwmon_read_in(dev, attr, channel, val);
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default:
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return -EOPNOTSUPP;
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}
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}
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static const char *const bcm54140_hwmon_in_labels[] = {
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"AVDDL",
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"AVDDH",
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};
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static int bcm54140_hwmon_read_string(struct device *dev,
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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 = bcm54140_hwmon_in_labels[channel];
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return 0;
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default:
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return -EOPNOTSUPP;
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}
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default:
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return -EOPNOTSUPP;
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}
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}
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static int bcm54140_hwmon_write_temp(struct device *dev, u32 attr,
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int channel, long val)
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{
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struct phy_device *phydev = dev_get_drvdata(dev);
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u16 mask = BCM54140_RDB_MON_TEMP_DATA_MASK;
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u16 reg;
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val = clamp_val(val, BCM54140_HWMON_TO_TEMP(mask),
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BCM54140_HWMON_TO_TEMP(0));
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switch (attr) {
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case hwmon_temp_min:
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reg = BCM54140_RDB_MON_TEMP_MIN;
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break;
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case hwmon_temp_max:
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reg = BCM54140_RDB_MON_TEMP_MAX;
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break;
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default:
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return -EOPNOTSUPP;
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}
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return bcm_phy_modify_rdb(phydev, reg, mask,
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BCM54140_HWMON_FROM_TEMP(val));
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}
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static int bcm54140_hwmon_write_in(struct device *dev, u32 attr,
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int channel, long val)
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{
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struct phy_device *phydev = dev_get_drvdata(dev);
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u16 mask = BCM54140_HWMON_IN_MASK(channel);
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u16 reg;
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val = clamp_val(val, 0, BCM54140_HWMON_TO_IN(channel, mask));
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switch (attr) {
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case hwmon_in_min:
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reg = BCM54140_HWMON_IN_MIN_REG(channel);
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break;
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case hwmon_in_max:
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reg = BCM54140_HWMON_IN_MAX_REG(channel);
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break;
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default:
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return -EOPNOTSUPP;
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}
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return bcm_phy_modify_rdb(phydev, reg, mask,
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BCM54140_HWMON_FROM_IN(channel, val));
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}
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static int bcm54140_hwmon_write(struct device *dev,
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enum hwmon_sensor_types type, u32 attr,
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int channel, long val)
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{
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switch (type) {
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case hwmon_temp:
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return bcm54140_hwmon_write_temp(dev, attr, channel, val);
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case hwmon_in:
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return bcm54140_hwmon_write_in(dev, attr, channel, val);
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default:
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return -EOPNOTSUPP;
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}
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}
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static const struct hwmon_channel_info *bcm54140_hwmon_info[] = {
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HWMON_CHANNEL_INFO(temp,
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HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
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HWMON_T_ALARM),
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HWMON_CHANNEL_INFO(in,
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HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
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HWMON_I_ALARM | HWMON_I_LABEL,
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HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
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HWMON_I_ALARM | HWMON_I_LABEL),
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NULL
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};
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static const struct hwmon_ops bcm54140_hwmon_ops = {
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.is_visible = bcm54140_hwmon_is_visible,
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.read = bcm54140_hwmon_read,
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.read_string = bcm54140_hwmon_read_string,
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.write = bcm54140_hwmon_write,
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};
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static const struct hwmon_chip_info bcm54140_chip_info = {
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.ops = &bcm54140_hwmon_ops,
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.info = bcm54140_hwmon_info,
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};
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static int bcm54140_enable_monitoring(struct phy_device *phydev)
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{
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u16 mask, set;
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/* 3.3V voltage mode */
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set = BCM54140_RDB_MON_CTRL_V_MODE;
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/* select round-robin */
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mask = BCM54140_RDB_MON_CTRL_SEL_MASK;
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set |= FIELD_PREP(BCM54140_RDB_MON_CTRL_SEL_MASK,
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BCM54140_RDB_MON_CTRL_SEL_RR);
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/* remove power-down bit */
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mask |= BCM54140_RDB_MON_CTRL_PWR_DOWN;
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return bcm_phy_modify_rdb(phydev, BCM54140_RDB_MON_CTRL, mask, set);
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}
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/* Check if one PHY has already done the init of the parts common to all PHYs
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* in the Quad PHY package.
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*/
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static bool bcm54140_is_pkg_init(struct phy_device *phydev)
|
||||
{
|
||||
struct bcm54140_priv *priv = phydev->priv;
|
||||
struct mii_bus *bus = phydev->mdio.bus;
|
||||
int base_addr = priv->base_addr;
|
||||
struct phy_device *phy;
|
||||
int i;
|
||||
|
||||
/* Quad PHY */
|
||||
for (i = 0; i < 4; i++) {
|
||||
phy = mdiobus_get_phy(bus, base_addr + i);
|
||||
if (!phy)
|
||||
continue;
|
||||
|
||||
if ((phy->phy_id & phydev->drv->phy_id_mask) !=
|
||||
(phydev->drv->phy_id & phydev->drv->phy_id_mask))
|
||||
continue;
|
||||
|
||||
priv = phy->priv;
|
||||
|
||||
if (priv && priv->pkg_init)
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static int bcm54140_probe_once(struct phy_device *phydev)
|
||||
{
|
||||
struct device *hwmon;
|
||||
int ret;
|
||||
|
||||
/* enable hardware monitoring */
|
||||
ret = bcm54140_enable_monitoring(phydev);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
hwmon = devm_hwmon_device_register_with_info(&phydev->mdio.dev,
|
||||
"BCM54140", phydev,
|
||||
&bcm54140_chip_info,
|
||||
NULL);
|
||||
return PTR_ERR_OR_ZERO(hwmon);
|
||||
}
|
||||
#endif
|
||||
|
||||
static int bcm54140_base_read_rdb(struct phy_device *phydev, u16 rdb)
|
||||
{
|
||||
struct bcm54140_priv *priv = phydev->priv;
|
||||
@ -222,6 +606,18 @@ static int bcm54140_probe(struct phy_device *phydev)
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
#if IS_ENABLED(CONFIG_HWMON)
|
||||
mutex_init(&priv->alarm_lock);
|
||||
|
||||
if (!bcm54140_is_pkg_init(phydev)) {
|
||||
ret = bcm54140_probe_once(phydev);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
priv->pkg_init = true;
|
||||
#endif
|
||||
|
||||
phydev_dbg(phydev, "probed (port %d, base PHY address %d)\n",
|
||||
priv->port, priv->base_addr);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user