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net: phy: mscc: restore the base page in vsc8514/8584_config_init

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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 <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Antoine Tenart 2020-06-25 17:42:09 +02:00 committed by David S. Miller
parent d9608aacd3
commit 6119dda34e
1 changed files with 9 additions and 0 deletions
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9
drivers/net/phy/mscc/mscc_main.c
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@ -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;