From: Andrew Lunn Date: Fri, 20 Jan 2017 00:37:49 +0000 (+0100) Subject: phy: marvell: Add support for temperature sensor X-Git-Tag: v4.14-rc1~1463^2~358^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0b04680fdae464ee51409b8cb36005f6ef8bd689;p=platform%2Fkernel%2Flinux-rpi3.git phy: marvell: Add support for temperature sensor Some Marvell PHYs have an inbuilt temperature sensor. Add hwmon support for this sensor. There are two different variants. The simpler, older chips have a 5 degree accuracy. The newer devices have 1 degree accuracy. Signed-off-by: Andrew Lunn Signed-off-by: David S. Miller --- diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index 0b78210..6422997 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -17,8 +17,10 @@ */ #include #include +#include #include #include +#include #include #include #include @@ -90,6 +92,17 @@ #define MII_88E1121_PHY_MSCR_TX_DELAY BIT(4) #define MII_88E1121_PHY_MSCR_DELAY_MASK (~(0x3 << 4)) +#define MII_88E1121_MISC_TEST 0x1a +#define MII_88E1510_MISC_TEST_TEMP_THRESHOLD_MASK 0x1f00 +#define MII_88E1510_MISC_TEST_TEMP_THRESHOLD_SHIFT 8 +#define MII_88E1510_MISC_TEST_TEMP_IRQ_EN BIT(7) +#define MII_88E1510_MISC_TEST_TEMP_IRQ BIT(6) +#define MII_88E1121_MISC_TEST_TEMP_SENSOR_EN BIT(5) +#define MII_88E1121_MISC_TEST_TEMP_MASK 0x1f + +#define MII_88E1510_TEMP_SENSOR 0x1b +#define MII_88E1510_TEMP_SENSOR_MASK 0xff + #define MII_88E1318S_PHY_MSCR1_REG 16 #define MII_88E1318S_PHY_MSCR1_PAD_ODD BIT(6) @@ -172,6 +185,8 @@ static struct marvell_hw_stat marvell_hw_stats[] = { struct marvell_priv { u64 stats[ARRAY_SIZE(marvell_hw_stats)]; + char *hwmon_name; + struct device *hwmon_dev; }; static int marvell_ack_interrupt(struct phy_device *phydev) @@ -1468,6 +1483,371 @@ static void marvell_get_stats(struct phy_device *phydev, data[i] = marvell_get_stat(phydev, i); } +#ifdef CONFIG_HWMON +static int m88e1121_get_temp(struct phy_device *phydev, long *temp) +{ + int ret; + int val; + + *temp = 0; + + mutex_lock(&phydev->lock); + + ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6); + if (ret < 0) + goto error; + + /* Enable temperature sensor */ + ret = phy_read(phydev, MII_88E1121_MISC_TEST); + if (ret < 0) + goto error; + + ret = phy_write(phydev, MII_88E1121_MISC_TEST, + ret | MII_88E1121_MISC_TEST_TEMP_SENSOR_EN); + if (ret < 0) + goto error; + + /* Wait for temperature to stabilize */ + usleep_range(10000, 12000); + + val = phy_read(phydev, MII_88E1121_MISC_TEST); + if (val < 0) { + ret = val; + goto error; + } + + /* Disable temperature sensor */ + ret = phy_write(phydev, MII_88E1121_MISC_TEST, + ret & ~MII_88E1121_MISC_TEST_TEMP_SENSOR_EN); + if (ret < 0) + goto error; + + *temp = ((val & MII_88E1121_MISC_TEST_TEMP_MASK) - 5) * 5000; + +error: + phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0); + mutex_unlock(&phydev->lock); + + return ret; +} + +static int m88e1121_hwmon_read(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, long *temp) +{ + struct phy_device *phydev = dev_get_drvdata(dev); + int err; + + switch (attr) { + case hwmon_temp_input: + err = m88e1121_get_temp(phydev, temp); + break; + default: + return -EOPNOTSUPP; + } + + return err; +} + +static umode_t m88e1121_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: + return 0444; + default: + return 0; + } +} + +static u32 m88e1121_hwmon_chip_config[] = { + HWMON_C_REGISTER_TZ, + 0 +}; + +static const struct hwmon_channel_info m88e1121_hwmon_chip = { + .type = hwmon_chip, + .config = m88e1121_hwmon_chip_config, +}; + +static u32 m88e1121_hwmon_temp_config[] = { + HWMON_T_INPUT, + 0 +}; + +static const struct hwmon_channel_info m88e1121_hwmon_temp = { + .type = hwmon_temp, + .config = m88e1121_hwmon_temp_config, +}; + +static const struct hwmon_channel_info *m88e1121_hwmon_info[] = { + &m88e1121_hwmon_chip, + &m88e1121_hwmon_temp, + NULL +}; + +static const struct hwmon_ops m88e1121_hwmon_hwmon_ops = { + .is_visible = m88e1121_hwmon_is_visible, + .read = m88e1121_hwmon_read, +}; + +static const struct hwmon_chip_info m88e1121_hwmon_chip_info = { + .ops = &m88e1121_hwmon_hwmon_ops, + .info = m88e1121_hwmon_info, +}; + +static int m88e1510_get_temp(struct phy_device *phydev, long *temp) +{ + int ret; + + *temp = 0; + + mutex_lock(&phydev->lock); + + ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6); + if (ret < 0) + goto error; + + ret = phy_read(phydev, MII_88E1510_TEMP_SENSOR); + if (ret < 0) + goto error; + + *temp = ((ret & MII_88E1510_TEMP_SENSOR_MASK) - 25) * 1000; + +error: + phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0); + mutex_unlock(&phydev->lock); + + return ret; +} + +int m88e1510_get_temp_critical(struct phy_device *phydev, long *temp) +{ + int ret; + + *temp = 0; + + mutex_lock(&phydev->lock); + + ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6); + if (ret < 0) + goto error; + + ret = phy_read(phydev, MII_88E1121_MISC_TEST); + if (ret < 0) + goto error; + + *temp = (((ret & MII_88E1510_MISC_TEST_TEMP_THRESHOLD_MASK) >> + MII_88E1510_MISC_TEST_TEMP_THRESHOLD_SHIFT) * 5) - 25; + /* convert to mC */ + *temp *= 1000; + +error: + phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0); + mutex_unlock(&phydev->lock); + + return ret; +} + +int m88e1510_set_temp_critical(struct phy_device *phydev, long temp) +{ + int ret; + + mutex_lock(&phydev->lock); + + ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6); + if (ret < 0) + goto error; + + ret = phy_read(phydev, MII_88E1121_MISC_TEST); + if (ret < 0) + goto error; + + temp = temp / 1000; + temp = clamp_val(DIV_ROUND_CLOSEST(temp, 5) + 5, 0, 0x1f); + ret = phy_write(phydev, MII_88E1121_MISC_TEST, + (ret & ~MII_88E1510_MISC_TEST_TEMP_THRESHOLD_MASK) | + (temp << MII_88E1510_MISC_TEST_TEMP_THRESHOLD_SHIFT)); + +error: + phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0); + mutex_unlock(&phydev->lock); + + return ret; +} + +int m88e1510_get_temp_alarm(struct phy_device *phydev, long *alarm) +{ + int ret; + + *alarm = false; + + mutex_lock(&phydev->lock); + + ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6); + if (ret < 0) + goto error; + + ret = phy_read(phydev, MII_88E1121_MISC_TEST); + if (ret < 0) + goto error; + *alarm = !!(ret & MII_88E1510_MISC_TEST_TEMP_IRQ); + +error: + phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0); + mutex_unlock(&phydev->lock); + + return ret; +} + +static int m88e1510_hwmon_read(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, long *temp) +{ + struct phy_device *phydev = dev_get_drvdata(dev); + int err; + + switch (attr) { + case hwmon_temp_input: + err = m88e1510_get_temp(phydev, temp); + break; + case hwmon_temp_crit: + err = m88e1510_get_temp_critical(phydev, temp); + break; + case hwmon_temp_max_alarm: + err = m88e1510_get_temp_alarm(phydev, temp); + break; + default: + return -EOPNOTSUPP; + } + + return err; +} + +static int m88e1510_hwmon_write(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, long temp) +{ + struct phy_device *phydev = dev_get_drvdata(dev); + int err; + + switch (attr) { + case hwmon_temp_crit: + err = m88e1510_set_temp_critical(phydev, temp); + break; + default: + return -EOPNOTSUPP; + } + return err; +} + +static umode_t m88e1510_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_max_alarm: + return 0444; + case hwmon_temp_crit: + return 0644; + default: + return 0; + } +} + +static u32 m88e1510_hwmon_temp_config[] = { + HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_MAX_ALARM, + 0 +}; + +static const struct hwmon_channel_info m88e1510_hwmon_temp = { + .type = hwmon_temp, + .config = m88e1510_hwmon_temp_config, +}; + +static const struct hwmon_channel_info *m88e1510_hwmon_info[] = { + &m88e1121_hwmon_chip, + &m88e1510_hwmon_temp, + NULL +}; + +static const struct hwmon_ops m88e1510_hwmon_hwmon_ops = { + .is_visible = m88e1510_hwmon_is_visible, + .read = m88e1510_hwmon_read, + .write = m88e1510_hwmon_write, +}; + +static const struct hwmon_chip_info m88e1510_hwmon_chip_info = { + .ops = &m88e1510_hwmon_hwmon_ops, + .info = m88e1510_hwmon_info, +}; + +static int marvell_hwmon_name(struct phy_device *phydev) +{ + struct marvell_priv *priv = phydev->priv; + struct device *dev = &phydev->mdio.dev; + const char *devname = dev_name(dev); + size_t len = strlen(devname); + int i, j; + + priv->hwmon_name = devm_kzalloc(dev, len, GFP_KERNEL); + if (!priv->hwmon_name) + return -ENOMEM; + + for (i = j = 0; i < len && devname[i]; i++) { + if (isalnum(devname[i])) + priv->hwmon_name[j++] = devname[i]; + } + + return 0; +} + +static int marvell_hwmon_probe(struct phy_device *phydev, + const struct hwmon_chip_info *chip) +{ + struct marvell_priv *priv = phydev->priv; + struct device *dev = &phydev->mdio.dev; + int err; + + err = marvell_hwmon_name(phydev); + if (err) + return err; + + priv->hwmon_dev = devm_hwmon_device_register_with_info( + dev, priv->hwmon_name, phydev, chip, NULL); + + return PTR_ERR_OR_ZERO(priv->hwmon_dev); +} + +static int m88e1121_hwmon_probe(struct phy_device *phydev) +{ + return marvell_hwmon_probe(phydev, &m88e1121_hwmon_chip_info); +} + +static int m88e1510_hwmon_probe(struct phy_device *phydev) +{ + return marvell_hwmon_probe(phydev, &m88e1510_hwmon_chip_info); +} +#else +static int m88e1121_hwmon_probe(struct phy_device *phydev) +{ + return 0; +} + +static int m88e1510_hwmon_probe(struct phy_device *phydev) +{ + return 0; +} +#endif + static int marvell_probe(struct phy_device *phydev) { struct marvell_priv *priv; @@ -1481,6 +1861,39 @@ static int marvell_probe(struct phy_device *phydev) return 0; } +static int m88e1121_probe(struct phy_device *phydev) +{ + int err; + + err = marvell_probe(phydev); + if (err) + return err; + + return m88e1121_hwmon_probe(phydev); +} + +static int m88e1510_probe(struct phy_device *phydev) +{ + int err; + + err = marvell_probe(phydev); + if (err) + return err; + + return m88e1510_hwmon_probe(phydev); +} + +static void marvell_remove(struct phy_device *phydev) +{ +#ifdef CONFIG_HWMON + + struct marvell_priv *priv = phydev->priv; + + if (priv && priv->hwmon_dev) + hwmon_device_unregister(priv->hwmon_dev); +#endif +} + static struct phy_driver marvell_drivers[] = { { .phy_id = MARVELL_PHY_ID_88E1101, @@ -1558,9 +1971,10 @@ static struct phy_driver marvell_drivers[] = { .phy_id = MARVELL_PHY_ID_88E1121R, .phy_id_mask = MARVELL_PHY_ID_MASK, .name = "Marvell 88E1121R", + .probe = &m88e1121_probe, + .remove = &marvell_remove, .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_INTERRUPT, - .probe = marvell_probe, .config_init = &m88e1121_config_init, .config_aneg = &m88e1121_config_aneg, .read_status = &marvell_read_status, @@ -1671,8 +2085,10 @@ static struct phy_driver marvell_drivers[] = { .phy_id_mask = MARVELL_PHY_ID_MASK, .name = "Marvell 88E1510", .features = PHY_GBIT_FEATURES | SUPPORTED_FIBRE, + .probe = &m88e1510_probe, + .remove = &marvell_remove, + .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_INTERRUPT, - .probe = marvell_probe, .config_init = &m88e1510_config_init, .config_aneg = &m88e1510_config_aneg, .read_status = &marvell_read_status, @@ -1689,9 +2105,10 @@ static struct phy_driver marvell_drivers[] = { .phy_id = MARVELL_PHY_ID_88E1540, .phy_id_mask = MARVELL_PHY_ID_MASK, .name = "Marvell 88E1540", + .probe = m88e1510_probe, + .remove = &marvell_remove, .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_INTERRUPT, - .probe = marvell_probe, .config_init = &marvell_config_init, .config_aneg = &m88e1510_config_aneg, .read_status = &marvell_read_status,