Hello,
This series contains various improvements to the MSCC PHY driver, fixing
sparse and smatch warnings, using functions provided by the PHY core,
and improving the driver consistency and maintenance.
I don't think any of those improvements and fixes is worth backporting
to stable trees.
Thanks!
Antoine
Antoine Tenart (8):
net: phy: mscc: macsec: fix sparse warnings
net: phy: mscc: fix a possible double unlock
net: phy: mscc: ptp: fix a smatch error
net: phy: mscc: ptp: fix a typo in a comment
net: phy: mscc: do not access the MDIO bus lock directly
net: phy: mscc: restore the base page in vsc8514/8584_config_init
net: phy: mscc: remove useless page configuration in the config init
net: phy: mscc: improve vsc8514/8584_config_init consistency
drivers/net/phy/mscc/mscc_macsec.c | 12 ++++---
drivers/net/phy/mscc/mscc_main.c | 54 +++++++++++++++++-------------
drivers/net/phy/mscc/mscc_ptp.c | 15 +++++----
3 files changed, 45 insertions(+), 36 deletions(-)
--
2.26.2
In the vsc8584_config_init and vsc8514_config_init, the base page is set
to 'GPIO', configuration is done, and the page is never explicitly
restored to the standard page. No bug was triggered as it turns out
helpers called in those config_init functions do modify the base page,
and set it back to standard. But that is dangerous and any modification
to those functions would introduce bugs. This patch fixes this, to
improve maintenance, by restoring the base page to 'standard' once
'GPIO' accesses are completed.
Signed-off-by: Antoine Tenart <[email protected]>
---
drivers/net/phy/mscc/mscc_main.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c
index 03680933f530..f625109df00a 100644
--- a/drivers/net/phy/mscc/mscc_main.c
+++ b/drivers/net/phy/mscc/mscc_main.c
@@ -1395,6 +1395,11 @@ static int vsc8584_config_init(struct phy_device *phydev)
if (ret)
goto err;
+ ret = phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
+ MSCC_PHY_PAGE_STANDARD);
+ if (ret)
+ goto err;
+
if (!phy_interface_is_rgmii(phydev)) {
val = PROC_CMD_MCB_ACCESS_MAC_CONF | PROC_CMD_RST_CONF_PORT |
PROC_CMD_READ_MOD_WRITE_PORT;
@@ -1779,7 +1784,11 @@ static int vsc8514_config_init(struct phy_device *phydev)
val &= ~MAC_CFG_MASK;
val |= MAC_CFG_QSGMII;
ret = phy_base_write(phydev, MSCC_PHY_MAC_CFG_FASTLINK, val);
+ if (ret)
+ goto err;
+ ret = phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
+ MSCC_PHY_PAGE_STANDARD);
if (ret)
goto err;
--
2.26.2
This patch improves the MSCC driver by using the provided
phy_lock_mdio_bus and phy_unlock_mdio_bus helpers instead of locking and
unlocking the MDIO bus lock directly. The patch is only cosmetic but
should improve maintenance and consistency.
Signed-off-by: Antoine Tenart <[email protected]>
---
drivers/net/phy/mscc/mscc_main.c | 24 ++++++++++++------------
drivers/net/phy/mscc/mscc_ptp.c | 12 ++++++------
2 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c
index cb4e15d6e2db..03680933f530 100644
--- a/drivers/net/phy/mscc/mscc_main.c
+++ b/drivers/net/phy/mscc/mscc_main.c
@@ -1288,7 +1288,7 @@ static void vsc8584_get_base_addr(struct phy_device *phydev)
struct vsc8531_private *vsc8531 = phydev->priv;
u16 val, addr;
- mutex_lock(&phydev->mdio.bus->mdio_lock);
+ phy_lock_mdio_bus(phydev);
__phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_EXTENDED);
addr = __phy_read(phydev, MSCC_PHY_EXT_PHY_CNTL_4);
@@ -1297,7 +1297,7 @@ static void vsc8584_get_base_addr(struct phy_device *phydev)
val = __phy_read(phydev, MSCC_PHY_ACTIPHY_CNTL);
__phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
/* In the package, there are two pairs of PHYs (PHY0 + PHY2 and
* PHY1 + PHY3). The first PHY of each pair (PHY0 and PHY1) is
@@ -1331,7 +1331,7 @@ static int vsc8584_config_init(struct phy_device *phydev)
phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
- mutex_lock(&phydev->mdio.bus->mdio_lock);
+ phy_lock_mdio_bus(phydev);
/* Some parts of the init sequence are identical for every PHY in the
* package. Some parts are modifying the GPIO register bank which is a
@@ -1428,7 +1428,7 @@ static int vsc8584_config_init(struct phy_device *phydev)
if (ret)
goto err;
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
ret = vsc8584_macsec_init(phydev);
if (ret)
@@ -1469,7 +1469,7 @@ static int vsc8584_config_init(struct phy_device *phydev)
return 0;
err:
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
return ret;
}
@@ -1755,7 +1755,7 @@ static int vsc8514_config_init(struct phy_device *phydev)
phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
- mutex_lock(&phydev->mdio.bus->mdio_lock);
+ phy_lock_mdio_bus(phydev);
/* Some parts of the init sequence are identical for every PHY in the
* package. Some parts are modifying the GPIO register bank which is a
@@ -1843,14 +1843,14 @@ static int vsc8514_config_init(struct phy_device *phydev)
reg = vsc85xx_csr_ctrl_phy_read(phydev, PHY_MCB_TARGET,
PHY_S6G_PLL_STATUS);
if (reg == 0xffffffff) {
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
return -EIO;
}
} while (time_before(jiffies, deadline) && (reg & BIT(12)));
if (reg & BIT(12)) {
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
return -ETIMEDOUT;
}
@@ -1870,18 +1870,18 @@ static int vsc8514_config_init(struct phy_device *phydev)
reg = vsc85xx_csr_ctrl_phy_read(phydev, PHY_MCB_TARGET,
PHY_S6G_IB_STATUS0);
if (reg == 0xffffffff) {
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
return -EIO;
}
} while (time_before(jiffies, deadline) && !(reg & BIT(8)));
if (!(reg & BIT(8))) {
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
return -ETIMEDOUT;
}
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
ret = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
@@ -1908,7 +1908,7 @@ static int vsc8514_config_init(struct phy_device *phydev)
return ret;
err:
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
return ret;
}
diff --git a/drivers/net/phy/mscc/mscc_ptp.c b/drivers/net/phy/mscc/mscc_ptp.c
index d4266911efc5..ef3441747348 100644
--- a/drivers/net/phy/mscc/mscc_ptp.c
+++ b/drivers/net/phy/mscc/mscc_ptp.c
@@ -80,7 +80,7 @@ static u32 vsc85xx_ts_read_csr(struct phy_device *phydev, enum ts_blk blk,
break;
}
- mutex_lock(&phydev->mdio.bus->mdio_lock);
+ phy_lock_mdio_bus(phydev);
phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_1588);
@@ -98,7 +98,7 @@ static u32 vsc85xx_ts_read_csr(struct phy_device *phydev, enum ts_blk blk,
phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
return val;
}
@@ -130,7 +130,7 @@ static void vsc85xx_ts_write_csr(struct phy_device *phydev, enum ts_blk blk,
break;
}
- mutex_lock(&phydev->mdio.bus->mdio_lock);
+ phy_lock_mdio_bus(phydev);
bypass = phy_ts_base_read(phydev, MSCC_PHY_BYPASS_CONTROL);
@@ -154,7 +154,7 @@ static void vsc85xx_ts_write_csr(struct phy_device *phydev, enum ts_blk blk,
if (cond && upper)
phy_ts_base_write(phydev, MSCC_PHY_BYPASS_CONTROL, bypass);
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
}
/* Pick bytes from PTP header */
@@ -1273,7 +1273,7 @@ static int __vsc8584_init_ptp(struct phy_device *phydev)
u32 val;
if (!vsc8584_is_1588_input_clk_configured(phydev)) {
- mutex_lock(&phydev->mdio.bus->mdio_lock);
+ phy_lock_mdio_bus(phydev);
/* 1588_DIFF_INPUT_CLK configuration: Use an external clock for
* the LTC, as per 3.13.29 in the VSC8584 datasheet.
@@ -1285,7 +1285,7 @@ static int __vsc8584_init_ptp(struct phy_device *phydev)
phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
MSCC_PHY_PAGE_STANDARD);
- mutex_unlock(&phydev->mdio.bus->mdio_lock);
+ phy_unlock_mdio_bus(phydev);
vsc8584_set_input_clk_configured(phydev);
}
--
2.26.2
In the middle of vsc8584_config_init and vsc8514_config_init, the page
is set to 'standard'. This is the default value, and the page isn't set
to another value before. Those pages configuration can be safely
removed.
Signed-off-by: Antoine Tenart <[email protected]>
---
drivers/net/phy/mscc/mscc_main.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c
index f625109df00a..04e1ef791cec 100644
--- a/drivers/net/phy/mscc/mscc_main.c
+++ b/drivers/net/phy/mscc/mscc_main.c
@@ -1443,8 +1443,6 @@ static int vsc8584_config_init(struct phy_device *phydev)
if (ret)
return ret;
- phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
-
val = phy_read(phydev, MSCC_PHY_EXT_PHY_CNTL_1);
val &= ~(MEDIA_OP_MODE_MASK | VSC8584_MAC_IF_SELECTION_MASK);
val |= (MEDIA_OP_MODE_COPPER << MEDIA_OP_MODE_POS) |
@@ -1892,11 +1890,6 @@ static int vsc8514_config_init(struct phy_device *phydev)
phy_unlock_mdio_bus(phydev);
- ret = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
-
- if (ret)
- return ret;
-
ret = phy_modify(phydev, MSCC_PHY_EXT_PHY_CNTL_1, MEDIA_OP_MODE_MASK,
MEDIA_OP_MODE_COPPER << MEDIA_OP_MODE_POS);
--
2.26.2
All PHY read and write return values are checked for errors in
vsc8514_config_init and vsc8584_config_init, except for one. Fix this.
Signed-off-by: Antoine Tenart <[email protected]>
---
drivers/net/phy/mscc/mscc_main.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c
index 04e1ef791cec..a4fbf3a4fa97 100644
--- a/drivers/net/phy/mscc/mscc_main.c
+++ b/drivers/net/phy/mscc/mscc_main.c
@@ -1375,8 +1375,10 @@ static int vsc8584_config_init(struct phy_device *phydev)
goto err;
}
- phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
- MSCC_PHY_PAGE_EXTENDED_GPIO);
+ ret = phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
+ MSCC_PHY_PAGE_EXTENDED_GPIO);
+ if (ret)
+ goto err;
val = phy_base_read(phydev, MSCC_PHY_MAC_CFG_FASTLINK);
val &= ~MAC_CFG_MASK;
@@ -1774,8 +1776,10 @@ static int vsc8514_config_init(struct phy_device *phydev)
if (phy_package_init_once(phydev))
vsc8514_config_pre_init(phydev);
- phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
- MSCC_PHY_PAGE_EXTENDED_GPIO);
+ ret = phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
+ MSCC_PHY_PAGE_EXTENDED_GPIO);
+ if (ret)
+ goto err;
val = phy_base_read(phydev, MSCC_PHY_MAC_CFG_FASTLINK);
--
2.26.2
This patch fixes a typo in a comment, s/Ths/This/. The patch is cosmetic
only.
Signed-off-by: Antoine Tenart <[email protected]>
---
drivers/net/phy/mscc/mscc_ptp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/phy/mscc/mscc_ptp.c b/drivers/net/phy/mscc/mscc_ptp.c
index 030a56c9a06d..d4266911efc5 100644
--- a/drivers/net/phy/mscc/mscc_ptp.c
+++ b/drivers/net/phy/mscc/mscc_ptp.c
@@ -1564,7 +1564,7 @@ int vsc8584_ptp_probe(struct phy_device *phydev)
/* Retrieve the shared load/save GPIO. Request it as non exclusive as
* the same GPIO can be requested by all the PHYs of the same package.
- * Ths GPIO must be used with the gpio_lock taken (the lock is shared
+ * This GPIO must be used with the gpio_lock taken (the lock is shared
* between all PHYs).
*/
vsc8531->load_save = devm_gpiod_get_optional(&phydev->mdio.dev, "load-save",
--
2.26.2
On Thu, Jun 25, 2020 at 05:42:08PM +0200, Antoine Tenart wrote:
> This patch improves the MSCC driver by using the provided
> phy_lock_mdio_bus and phy_unlock_mdio_bus helpers instead of locking and
> unlocking the MDIO bus lock directly. The patch is only cosmetic but
> should improve maintenance and consistency.
>
> Signed-off-by: Antoine Tenart <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Andrew
From: Antoine Tenart <[email protected]>
Date: Thu, 25 Jun 2020 17:42:03 +0200
> This series contains various improvements to the MSCC PHY driver, fixing
> sparse and smatch warnings, using functions provided by the PHY core,
> and improving the driver consistency and maintenance.
>
> I don't think any of those improvements and fixes is worth backporting
> to stable trees.
Series applied, thanks.