The IMP port is not a valid RGMII interface, but hard wired to internal,
so we shouldn't touch the undefined register B53_RGMII_CTRL_IMP.
While this does not seem to have any side effects, let's not touch it at
all, so limit RGMII configuration on bcm63xx to the actual RGMII ports.
Fixes: ce3bf94871f7 ("net: dsa: b53: add support for BCM63xx RGMIIs")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
v1 -> v2:
* new patch
drivers/net/dsa/b53/b53_common.c | 22 ++++++++--------------
1 file changed, 8 insertions(+), 14 deletions(-)
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index c186ee3fb28d..3f4934f974c8 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -22,6 +22,7 @@
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/math.h>
+#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/platform_data/b53.h>
#include <linux/phy.h>
@@ -1322,24 +1323,17 @@ static void b53_adjust_63xx_rgmii(struct dsa_switch *ds, int port,
phy_interface_t interface)
{
struct b53_device *dev = ds->priv;
- u8 rgmii_ctrl = 0, off;
+ u8 rgmii_ctrl = 0;
- if (port == dev->imp_port)
- off = B53_RGMII_CTRL_IMP;
- else
- off = B53_RGMII_CTRL_P(port);
-
- b53_read8(dev, B53_CTRL_PAGE, off, &rgmii_ctrl);
+ b53_read8(dev, B53_CTRL_PAGE, B53_RGMII_CTRL_P(port), &rgmii_ctrl);
rgmii_ctrl &= ~(RGMII_CTRL_DLL_RXC | RGMII_CTRL_DLL_TXC);
- if (port != dev->imp_port) {
- if (is63268(dev))
- rgmii_ctrl |= RGMII_CTRL_MII_OVERRIDE;
+ if (is63268(dev))
+ rgmii_ctrl |= RGMII_CTRL_MII_OVERRIDE;
- rgmii_ctrl |= RGMII_CTRL_ENABLE_GMII;
- }
+ rgmii_ctrl |= RGMII_CTRL_ENABLE_GMII;
- b53_write8(dev, B53_CTRL_PAGE, off, rgmii_ctrl);
+ b53_write8(dev, B53_CTRL_PAGE, B53_RGMII_CTRL_P(port), rgmii_ctrl);
dev_dbg(ds->dev, "Configured port %d for %s\n", port,
phy_modes(interface));
@@ -1484,7 +1478,7 @@ static void b53_phylink_mac_config(struct phylink_config *config,
struct b53_device *dev = ds->priv;
int port = dp->index;
- if (is63xx(dev) && port >= B53_63XX_RGMII0)
+ if (is63xx(dev) && in_range(port, B53_63XX_RGMII0, 4))
b53_adjust_63xx_rgmii(ds, port, interface);
if (mode == MLO_AN_FIXED) {
--
2.43.0