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Message-ID: <Z6eJ6qPs7ORuOrbt@eichest-laptop>
Date: Sat, 8 Feb 2025 17:44:26 +0100
From: Stefan Eichenberger <eichest@...il.com>
To: Dimitri Fedrau <dima.fedrau@...il.com>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Niklas Söderlund <niklas.soderlund+renesas@...natech.se>,
Gregor Herburger <gregor.herburger@...tq-group.com>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] net: phy: marvell-88q2xxx: Add support for
PHY LEDs on 88q2xxx
On Fri, Feb 07, 2025 at 05:24:20PM +0100, Dimitri Fedrau wrote:
> Marvell 88Q2XXX devices support up to two configurable Light Emitting
> Diode (LED). Add minimal LED controller driver supporting the most common
> uses with the 'netdev' trigger.
>
> Signed-off-by: Dimitri Fedrau <dima.fedrau@...il.com>
Reviewed-by: Stefan Eichenberger <eichest@...il.com>
> ---
> Changes in v2:
> - Renamed MDIO_MMD_PCS_MV_LED_FUNC_CTRL_GPIO_MASK to
> MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_1_MASK (Stefan)
> - Renamed MDIO_MMD_PCS_MV_LED_FUNC_CTRL_TX_EN_MASK to
> MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_0_MASK (Stefan)
> - Added comment for disabling tx disable feature (Stefan)
> - Added defines for all led functions (Andrew)
> - Move enabling of led0 function from mv88q2xxx_probe to
> mv88q222x_config_init. When the hardware reset pin is connected to a GPIO
> for example and we bring the interface down and up again, the content
> of the register MDIO_MMD_PCS_MV_RESET_CTRL is resetted to default.
> This means LED function is disabled and can't be enabled again.
> - Link to v1: https://lore.kernel.org/r/20250110-marvell-88q2xxx-leds-v1-1-22e7734941c2@gmail.com
> ---
> drivers/net/phy/marvell-88q2xxx.c | 175 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 175 insertions(+)
>
> diff --git a/drivers/net/phy/marvell-88q2xxx.c b/drivers/net/phy/marvell-88q2xxx.c
> index a3996471a1c9a5d4060d5d19ce44aa70e902a83f..2d5ea3e1b26219bb1e050222347c2688903e2430 100644
> --- a/drivers/net/phy/marvell-88q2xxx.c
> +++ b/drivers/net/phy/marvell-88q2xxx.c
> @@ -8,6 +8,7 @@
> */
> #include <linux/ethtool_netlink.h>
> #include <linux/marvell_phy.h>
> +#include <linux/of.h>
> #include <linux/phy.h>
> #include <linux/hwmon.h>
>
> @@ -27,6 +28,9 @@
> #define MDIO_MMD_AN_MV_STAT2_100BT1 0x2000
> #define MDIO_MMD_AN_MV_STAT2_1000BT1 0x4000
>
> +#define MDIO_MMD_PCS_MV_RESET_CTRL 32768
> +#define MDIO_MMD_PCS_MV_RESET_CTRL_TX_DISABLE 0x8
> +
> #define MDIO_MMD_PCS_MV_INT_EN 32784
> #define MDIO_MMD_PCS_MV_INT_EN_LINK_UP 0x0040
> #define MDIO_MMD_PCS_MV_INT_EN_LINK_DOWN 0x0080
> @@ -40,6 +44,22 @@
> #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_LED_FUNC_CTRL 32790
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_1_MASK GENMASK(7, 4)
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_0_MASK GENMASK(3, 0)
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK 0x0 /* Link established */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_RX_TX 0x1 /* Link established, blink for rx or tx activity */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_1000BT1 0x2 /* Blink 3x for 1000BT1 link established */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_RX_TX_ON 0x3 /* Receive or transmit activity */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_RX_TX 0x4 /* Blink on receive or transmit activity */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_TX 0x5 /* Transmit activity */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_COPPER 0x6 /* Copper Link established */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_1000BT1_ON 0x7 /* 1000BT1 link established */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_FORCE_OFF 0x8 /* Force off */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_FORCE_ON 0x9 /* Force on */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_FORCE_HIGHZ 0xa /* Force Hi-Z */
> +#define MDIO_MMD_PCS_MV_LED_FUNC_CTRL_FORCE_BLINK 0xb /* Force blink */
> +
> #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
> @@ -95,8 +115,12 @@
>
> #define MDIO_MMD_PCS_MV_TDR_OFF_CUTOFF 65246
>
> +#define MV88Q2XXX_LED_INDEX_TX_ENABLE 0
> +#define MV88Q2XXX_LED_INDEX_GPIO 1
> +
> struct mv88q2xxx_priv {
> bool enable_temp;
> + bool enable_led0;
> };
>
> struct mmd_val {
> @@ -740,15 +764,62 @@ static int mv88q2xxx_hwmon_probe(struct phy_device *phydev)
> }
> #endif
>
> +#if IS_ENABLED(CONFIG_OF_MDIO)
> +static int mv88q2xxx_leds_probe(struct phy_device *phydev)
> +{
> + struct device_node *node = phydev->mdio.dev.of_node;
> + struct mv88q2xxx_priv *priv = phydev->priv;
> + struct device_node *leds;
> + int ret = 0;
> + u32 index;
> +
> + if (!node)
> + return 0;
> +
> + leds = of_get_child_by_name(node, "leds");
> + if (!leds)
> + return 0;
> +
> + for_each_available_child_of_node_scoped(leds, led) {
> + ret = of_property_read_u32(led, "reg", &index);
> + if (ret)
> + goto exit;
> +
> + if (index > MV88Q2XXX_LED_INDEX_GPIO) {
> + ret = -EINVAL;
> + goto exit;
> + }
> +
> + if (index == MV88Q2XXX_LED_INDEX_TX_ENABLE)
> + priv->enable_led0 = true;
> + }
> +
> +exit:
> + of_node_put(leds);
> +
> + return ret;
> +}
> +
> +#else
> +static int mv88q2xxx_leds_probe(struct phy_device *phydev)
> +{
> + return 0;
> +}
> +#endif
> +
> static int mv88q2xxx_probe(struct phy_device *phydev)
> {
> struct mv88q2xxx_priv *priv;
> + int ret;
>
> priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
> if (!priv)
> return -ENOMEM;
>
> phydev->priv = priv;
> + ret = mv88q2xxx_leds_probe(phydev);
> + if (ret)
> + return ret;
>
> return mv88q2xxx_hwmon_probe(phydev);
> }
> @@ -829,6 +900,15 @@ static int mv88q222x_config_init(struct phy_device *phydev)
> return ret;
> }
>
> + /* Enable LED function and disable TX disable feature on LED/TX_ENABLE */
> + if (priv->enable_led0) {
> + ret = phy_clear_bits_mmd(phydev, MDIO_MMD_PCS,
> + MDIO_MMD_PCS_MV_RESET_CTRL,
> + MDIO_MMD_PCS_MV_RESET_CTRL_TX_DISABLE);
> + if (ret < 0)
> + return ret;
> + }
> +
> if (phydev->c45_ids.device_ids[MDIO_MMD_PMAPMD] == PHY_ID_88Q2220_REVB0)
> return mv88q222x_revb0_config_init(phydev);
> else
> @@ -918,6 +998,98 @@ static int mv88q222x_cable_test_get_status(struct phy_device *phydev,
> return 0;
> }
>
> +static int mv88q2xxx_led_mode(u8 index, unsigned long rules)
> +{
> + switch (rules) {
> + case BIT(TRIGGER_NETDEV_LINK):
> + return MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK;
> + case BIT(TRIGGER_NETDEV_LINK_1000):
> + return MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_1000BT1_ON;
> + case BIT(TRIGGER_NETDEV_TX):
> + return MDIO_MMD_PCS_MV_LED_FUNC_CTRL_TX;
> + case BIT(TRIGGER_NETDEV_TX) | BIT(TRIGGER_NETDEV_RX):
> + return MDIO_MMD_PCS_MV_LED_FUNC_CTRL_RX_TX;
> + case BIT(TRIGGER_NETDEV_LINK) | BIT(TRIGGER_NETDEV_TX) | BIT(TRIGGER_NETDEV_RX):
> + return MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_RX_TX;
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static int mv88q2xxx_led_hw_is_supported(struct phy_device *phydev, u8 index,
> + unsigned long rules)
> +{
> + int mode;
> +
> + mode = mv88q2xxx_led_mode(index, rules);
> + if (mode < 0)
> + return mode;
> +
> + return 0;
> +}
> +
> +static int mv88q2xxx_led_hw_control_set(struct phy_device *phydev, u8 index,
> + unsigned long rules)
> +{
> + int mode;
> +
> + mode = mv88q2xxx_led_mode(index, rules);
> + if (mode < 0)
> + return mode;
> +
> + if (index == MV88Q2XXX_LED_INDEX_TX_ENABLE)
> + return phy_modify_mmd(phydev, MDIO_MMD_PCS,
> + MDIO_MMD_PCS_MV_LED_FUNC_CTRL,
> + MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_0_MASK,
> + FIELD_PREP(MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_0_MASK,
> + mode));
> + else
> + return phy_modify_mmd(phydev, MDIO_MMD_PCS,
> + MDIO_MMD_PCS_MV_LED_FUNC_CTRL,
> + MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_1_MASK,
> + FIELD_PREP(MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_1_MASK,
> + mode));
> +}
> +
> +static int mv88q2xxx_led_hw_control_get(struct phy_device *phydev, u8 index,
> + unsigned long *rules)
> +{
> + int val;
> +
> + val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_MMD_PCS_MV_LED_FUNC_CTRL);
> + if (val < 0)
> + return val;
> +
> + if (index == MV88Q2XXX_LED_INDEX_TX_ENABLE)
> + val = FIELD_GET(MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_0_MASK, val);
> + else
> + val = FIELD_GET(MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LED_1_MASK, val);
> +
> + switch (val) {
> + case MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK:
> + *rules = BIT(TRIGGER_NETDEV_LINK);
> + break;
> + case MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_1000BT1_ON:
> + *rules = BIT(TRIGGER_NETDEV_LINK_1000);
> + break;
> + case MDIO_MMD_PCS_MV_LED_FUNC_CTRL_TX:
> + *rules = BIT(TRIGGER_NETDEV_TX);
> + break;
> + case MDIO_MMD_PCS_MV_LED_FUNC_CTRL_RX_TX:
> + *rules = BIT(TRIGGER_NETDEV_TX) | BIT(TRIGGER_NETDEV_RX);
> + break;
> + case MDIO_MMD_PCS_MV_LED_FUNC_CTRL_LINK_RX_TX:
> + *rules = BIT(TRIGGER_NETDEV_LINK) | BIT(TRIGGER_NETDEV_TX) |
> + BIT(TRIGGER_NETDEV_RX);
> + break;
> + default:
> + *rules = 0;
> + break;
> + }
> +
> + return 0;
> +}
> +
> static struct phy_driver mv88q2xxx_driver[] = {
> {
> .phy_id = MARVELL_PHY_ID_88Q2110,
> @@ -953,6 +1125,9 @@ static struct phy_driver mv88q2xxx_driver[] = {
> .get_sqi_max = mv88q2xxx_get_sqi_max,
> .suspend = mv88q2xxx_suspend,
> .resume = mv88q2xxx_resume,
> + .led_hw_is_supported = mv88q2xxx_led_hw_is_supported,
> + .led_hw_control_set = mv88q2xxx_led_hw_control_set,
> + .led_hw_control_get = mv88q2xxx_led_hw_control_get,
> },
> };
>
>
> ---
> base-commit: f84db3bc8abc2141839cdb9454061633a4ce1db7
> change-id: 20241221-marvell-88q2xxx-leds-69a4037b5157
>
> Best regards,
> --
> Dimitri Fedrau <dima.fedrau@...il.com>
>
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