From: Marco Felsch <m.felsch@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 6/7] net: phy: at803x: add disable hibernation mode support
Date: Mon, 10 Jul 2023 08:36:52 +0200 [thread overview]
Message-ID: <20230710063653.660040-6-m.felsch@pengutronix.de> (raw)
In-Reply-To: <20230710063653.660040-1-m.felsch@pengutronix.de>
This commit ports Linux commit:
| commit 9ecf04016c87bcb33b44e24489d33618e2592f41
| Author: Wei Fang <wei.fang@nxp.com>
| Date: Thu Aug 18 11:00:54 2022 +0800
|
| net: phy: at803x: add disable hibernation mode support
|
| When the cable is unplugged, the Atheros AR803x PHYs will enter
| hibernation mode after about 10 seconds if the hibernation mode
| is enabled and will not provide any clock to the MAC. But for
| some MACs, this feature might cause unexpected issues due to the
| logic of MACs.
| Taking SYNP MAC (stmmac) as an example, if the cable is unplugged
| and the "eth0" interface is down, the AR803x PHY will enter
| hibernation mode. Then perform the "ifconfig eth0 up" operation,
| the stmmac can't be able to complete the software reset operation
| and fail to init it's own DMA. Therefore, the "eth0" interface is
| failed to ifconfig up. Why does it cause this issue? The truth is
| that the software reset operation of the stmmac is designed to
| depend on the RX_CLK of PHY.
| So, this patch offers an option for the user to determine whether
| to disable the hibernation mode of AR803x PHYs.
|
| Signed-off-by: Wei Fang <wei.fang@nxp.com>
| Reviewed-by: Andrew Lunn <andrew@lunn.ch>
| Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
drivers/net/phy/at803x.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index cc425c318f..d8a9c3588f 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -32,6 +32,9 @@
#define AT803X_DEBUG_REG_5 0x05
#define AT803X_DEBUG_TX_CLK_DLY_EN BIT(8)
+#define AT803X_DEBUG_REG_HIB_CTRL 0x0b
+#define AT803X_DEBUG_HIB_CTRL_PS_HIB_EN BIT(15)
+
/* AT803x supports either the XTAL input pad, an internal PLL or the
* DSP as clock reference for the clock output pad. The XTAL reference
* is only used for 25 MHz output, all other frequencies need the PLL.
@@ -140,6 +143,20 @@ static int at803x_disable_tx_delay(struct phy_device *phydev)
AT803X_DEBUG_TX_CLK_DLY_EN, 0);
}
+static int at803x_hibernation_mode_config(struct phy_device *phydev)
+{
+ struct at803x_priv *priv = phydev->priv;
+
+ /* The default after hardware reset is hibernation mode enabled. After
+ * software reset, the value is retained.
+ */
+ if (!(priv->flags & AT803X_DISABLE_HIBERNATION_MODE))
+ return 0;
+
+ return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_HIB_CTRL,
+ AT803X_DEBUG_HIB_CTRL_PS_HIB_EN, 0);
+}
+
static bool at803x_match_phy_id(struct phy_device *phydev, u32 phy_id)
{
struct phy_driver *drv = to_phy_driver(phydev->dev.driver);
@@ -160,6 +177,9 @@ static int at803x_parse_dt(struct phy_device *phydev)
if (of_property_read_bool(node, "qca,disable-smarteee"))
priv->flags |= AT803X_DISABLE_SMARTEEE;
+ if (of_property_read_bool(node, "qca,disable-hibernation-mode"))
+ priv->flags |= AT803X_DISABLE_HIBERNATION_MODE;
+
if (!of_property_read_u32(node, "qca,smarteee-tw-us-1g", &tw)) {
if (!tw || tw > 255) {
phydev_err(phydev, "invalid qca,smarteee-tw-us-1g\n");
@@ -341,6 +361,10 @@ static int at803x_config_init(struct phy_device *phydev)
if (ret < 0)
return ret;
+ ret = at803x_hibernation_mode_config(phydev);
+ if (ret < 0)
+ return ret;
+
return 0;
}
--
2.39.2
next prev parent reply other threads:[~2023-07-10 6:38 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-10 6:36 [PATCH 1/7] ARM: boards: make use of MDIO_MMD register defines Marco Felsch
2023-07-10 6:36 ` [PATCH 2/7] net: phy: micrel: " Marco Felsch
2023-07-10 9:56 ` Ahmad Fatoum
2023-07-10 10:37 ` Marco Felsch
2023-07-10 6:36 ` [PATCH 3/7] net: phy: sync phy_{write,read,modify}_mmd_indirect with linux Marco Felsch
2023-07-10 9:59 ` Ahmad Fatoum
2023-07-10 10:49 ` Marco Felsch
2023-07-10 10:53 ` Ahmad Fatoum
2023-07-10 11:01 ` Marco Felsch
2023-07-10 11:03 ` Ahmad Fatoum
2023-07-10 12:43 ` Marco Felsch
2023-07-10 12:52 ` Ahmad Fatoum
2023-07-10 6:36 ` [PATCH 4/7] net: phy: add phydev_{err,err_probe,info,warn,dbg} macros Marco Felsch
2023-07-10 10:01 ` Ahmad Fatoum
2023-07-10 6:36 ` [PATCH 5/7] net: phy: at803x: add support for configuring SmartEEE Marco Felsch
2023-07-10 10:10 ` Ahmad Fatoum
2023-07-10 12:10 ` Oleksij Rempel
2023-07-10 6:36 ` Marco Felsch [this message]
2023-07-10 10:07 ` [PATCH 6/7] net: phy: at803x: add disable hibernation mode support Ahmad Fatoum
2023-07-10 10:53 ` Marco Felsch
2023-07-10 11:07 ` Ahmad Fatoum
2023-07-10 6:36 ` [PATCH 7/7] net: phy: at803x: disable extended next page bit Marco Felsch
2023-07-10 10:03 ` Ahmad Fatoum
2023-07-10 9:55 ` [PATCH 1/7] ARM: boards: make use of MDIO_MMD register defines Ahmad Fatoum
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