[PATCH net-next v2 4/7] net: dsa: mv88e6xxx: add field to specify internal phys layout

From: alexis . lothore
Date: Fri May 19 2023 - 10:13:20 EST


From: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>

mv88e6xxx currently assumes that switch equipped with internal phys have
those phys mapped contiguously starting from port 0 (see
mv88e6xxx_phy_is_internal). However, some switches have internal PHYs but
NOT starting from port 0. For example 88e6393X, 88E6193X and 88E6191X have
integrated PHYs available on ports 1 to 8
To properly support this offset, add a new field to allow specifying an
internal PHYs layout. If field is not set, default layout is assumed (start
at port 0)

Signed-off-by: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>
---
drivers/net/dsa/mv88e6xxx/chip.c | 4 +++-
drivers/net/dsa/mv88e6xxx/chip.h | 5 +++++
drivers/net/dsa/mv88e6xxx/global2.c | 6 +++++-
3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index c812e52bb5b7..2716d17c5c49 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -465,7 +465,9 @@ static int mv88e6xxx_port_setup_mac(struct mv88e6xxx_chip *chip, int port,

static int mv88e6xxx_phy_is_internal(struct mv88e6xxx_chip *chip, int port)
{
- return port < chip->info->num_internal_phys;
+ return port >= chip->info->internal_phys_offset &&
+ port < chip->info->num_internal_phys +
+ chip->info->internal_phys_offset;
}

static int mv88e6xxx_port_ppu_updates(struct mv88e6xxx_chip *chip, int port)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index da6e1339f809..eca51946c100 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -167,6 +167,11 @@ struct mv88e6xxx_info {

/* Supports PTP */
bool ptp_support;
+
+ /* Internal PHY start index. 0 means that internal PHYs range starts at
+ * port 0, 1 means internal PHYs range starts at port 1, etc
+ */
+ unsigned int internal_phys_offset;
};

struct mv88e6xxx_atu_entry {
diff --git a/drivers/net/dsa/mv88e6xxx/global2.c b/drivers/net/dsa/mv88e6xxx/global2.c
index 615896893076..d460f7290012 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.c
+++ b/drivers/net/dsa/mv88e6xxx/global2.c
@@ -1198,13 +1198,17 @@ int mv88e6xxx_g2_irq_mdio_setup(struct mv88e6xxx_chip *chip,
{
int phy, irq;

- for (phy = 0; phy < chip->info->num_internal_phys; phy++) {
+ for (phy = chip->info->internal_phys_offset;
+ phy <
+ chip->info->num_internal_phys + chip->info->internal_phys_offset;
+ phy++) {
irq = irq_find_mapping(chip->g2_irq.domain, phy);
if (irq < 0)
return irq;

bus->irq[chip->info->phy_base_addr + phy] = irq;
}
+
return 0;
}

--
2.40.1