| Message ID | 20240104110114.2020-4-ansuelsmth@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net: phy: generic polarity + LED support for qca808x | expand |
> + if (phydev->drv->led_polarity_set) { > + if (of_property_read_bool(led, "active-low")) > + set_bit(PHY_LED_ACTIVE_LOW, &modes); > + if (of_property_read_bool(led, "inactive-high-impedance")) > + set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes); > + > + err = phydev->drv->led_polarity_set(phydev, index, modes); > + if (err) > + return err; > + } I think we should return an error if asked to set the mode, but its not implemented by the driver. Something like: if (of_property_read_bool(led, "active-low")) set_bit(PHY_LED_ACTIVE_LOW, &modes); if (of_property_read_bool(led, "inactive-high-impedance")) set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes); if (mode) if (phydev->drv->led_polarity_set) { return -EINVAL; } else { err = phydev->drv->led_polarity_set(phydev, index, modes); if (err) return err; } } > + /** > + * @led_polarity_set: Set the LED polarity if active low The 'if active low' is not ouw of date, since it is used for more than that. > + * @dev: PHY device which has the LED > + * @index: Which LED of the PHY device or -1 > + * @modes: bitmap of LED polarity modes > + * > + * Configure LED with all the required polarity modes in @modes > + * to make it correctly turn ON or OFF. index == -1 should be explained. > + * > + * Returns 0, or an error code. > + */ > + int (*led_polarity_set)(struct phy_device *dev, int index, > + unsigned long modes); Andrew --- pw-bot: cr
On Thu, Jan 04, 2024 at 02:20:45PM +0100, Andrew Lunn wrote: > > + if (phydev->drv->led_polarity_set) { > > + if (of_property_read_bool(led, "active-low")) > > + set_bit(PHY_LED_ACTIVE_LOW, &modes); > > + if (of_property_read_bool(led, "inactive-high-impedance")) > > + set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes); > > + > > + err = phydev->drv->led_polarity_set(phydev, index, modes); > > + if (err) > > + return err; > > + } > > I think we should return an error if asked to set the mode, but its > not implemented by the driver. Something like: > > if (of_property_read_bool(led, "active-low")) > set_bit(PHY_LED_ACTIVE_LOW, &modes); > if (of_property_read_bool(led, "inactive-high-impedance")) > set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes); > > > if (mode) > if (phydev->drv->led_polarity_set) { > return -EINVAL; > } else { > err = phydev->drv->led_polarity_set(phydev, index, modes); > if (err) > return err; > } > } > > > + /** > > + * @led_polarity_set: Set the LED polarity if active low > > The 'if active low' is not ouw of date, since it is used for more than > that. > > > + * @dev: PHY device which has the LED > > + * @index: Which LED of the PHY device or -1 > > + * @modes: bitmap of LED polarity modes > > + * > > + * Configure LED with all the required polarity modes in @modes > > + * to make it correctly turn ON or OFF. > > index == -1 should be explained. > If you are referring to the special way of setting the LED globally, that is not a thing anymore. Rob pointed out that having the double reference in DT is problematic and PHY driver should handle that internally. > > + * > > + * Returns 0, or an error code. > > + */ > > + int (*led_polarity_set)(struct phy_device *dev, int index, > > + unsigned long modes); > > > Andrew > > --- > pw-bot: cr
> > > + * @dev: PHY device which has the LED > > > + * @index: Which LED of the PHY device or -1 > > > + * @modes: bitmap of LED polarity modes > > > + * > > > + * Configure LED with all the required polarity modes in @modes > > > + * to make it correctly turn ON or OFF. > > > > index == -1 should be explained. > > > > If you are referring to the special way of setting the LED globally, > that is not a thing anymore. Rob pointed out that having the double > reference in DT is problematic and PHY driver should handle that > internally. So it sounds like you need to change > > > + * @index: Which LED of the PHY device or -1 to remove the 'or -1' Andrew
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 1e595762afea..437a1c6046ab 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -3152,6 +3152,7 @@ static int of_phy_led(struct phy_device *phydev, struct device *dev = &phydev->mdio.dev; struct led_init_data init_data = {}; struct led_classdev *cdev; + unsigned long modes = 0; struct phy_led *phyled; u32 index; int err; @@ -3169,6 +3170,17 @@ static int of_phy_led(struct phy_device *phydev, if (index > U8_MAX) return -EINVAL; + if (phydev->drv->led_polarity_set) { + if (of_property_read_bool(led, "active-low")) + set_bit(PHY_LED_ACTIVE_LOW, &modes); + if (of_property_read_bool(led, "inactive-high-impedance")) + set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes); + + err = phydev->drv->led_polarity_set(phydev, index, modes); + if (err) + return err; + } + phyled->index = index; if (phydev->drv->led_brightness_set) cdev->brightness_set_blocking = phy_led_set_brightness; diff --git a/include/linux/phy.h b/include/linux/phy.h index ac22b8e28a85..da0a15a6d638 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -860,6 +860,15 @@ struct phy_plca_status { bool pst; }; +/* Modes for PHY LED configuration */ +enum phy_led_modes { + PHY_LED_ACTIVE_LOW = 0, + PHY_LED_INACTIVE_HIGH_IMPEDANCE = 1, + + /* keep it last */ + __PHY_LED_MODES_NUM, +}; + /** * struct phy_led: An LED driven by the PHY * @@ -1153,6 +1162,19 @@ struct phy_driver { int (*led_hw_control_get)(struct phy_device *dev, u8 index, unsigned long *rules); + /** + * @led_polarity_set: Set the LED polarity if active low + * @dev: PHY device which has the LED + * @index: Which LED of the PHY device or -1 + * @modes: bitmap of LED polarity modes + * + * Configure LED with all the required polarity modes in @modes + * to make it correctly turn ON or OFF. + * + * Returns 0, or an error code. + */ + int (*led_polarity_set)(struct phy_device *dev, int index, + unsigned long modes); }; #define to_phy_driver(d) container_of(to_mdio_common_driver(d), \ struct phy_driver, mdiodrv)
Add support for PHY LEDs polarity modes. Some PHY require LED to be set to active low to be turned ON. Adds support for this by declaring active-low property in DT. PHY driver needs to declare .led_polarity_set() to configure LED polarity modes. Function will pass the index with the LED index and a bitmap with all the required modes to set. Current supported modes are: - active-low with the flag PHY_LED_ACTIVE_LOW. LED is set to active-low to turn it ON. - inactive-high-impedance with the flag PHY_LED_INACTIVE_HIGH_IMPEDANCE. LED is set to high impedance to turn it OFF. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> --- Changes v5: - Rework to LED modes bitmap Changes v4: - Drop for global active-low - Rework to polarity option (for marvell10g series support) Changes v3: - Out of RFC Changes v2: - Add this patch drivers/net/phy/phy_device.c | 12 ++++++++++++ include/linux/phy.h | 22 ++++++++++++++++++++++ 2 files changed, 34 insertions(+)