diff options
| author | Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> | 2025-09-01 12:20:19 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-09 18:58:19 +0200 |
| commit | bb8fd694ba6b4896e01d0bbb8853202c8d367aae (patch) | |
| tree | 8a6cf55b6e56e0216b20b8072d82d8d4e3208f2f | |
| parent | b370f7b1f470a8d5485cc1e40e8ff663bb55d712 (diff) | |
net: pcs: rzn1-miic: Correct MODCTRL register offset
commit a7195a3d67dace056af7ca65144a11874df79562 upstream.
Correct the Mode Control Register (MODCTRL) offset for RZ/N MIIC.
According to the R-IN Engine and Ethernet Peripherals Manual (Rev.1.30)
[0], Table 10.1 "Ethernet Accessory Register List", MODCTRL is at offset
0x8, not 0x20 as previously defined.
Offset 0x20 actually maps to the Port Trigger Control Register (PTCTRL),
which controls PTP_MODE[3:0] and RGMII_CLKSEL[4]. Using this incorrect
definition prevented the driver from configuring the SW_MODE[4:0] bits
in MODCTRL, which control the internal connection of Ethernet ports. As
a result, the MIIC could not be switched into the correct mode, leading
to link setup failures and non-functional Ethernet ports on affected
systems.
[0] https://www.renesas.com/en/document/mah/rzn1d-group-rzn1s-group-rzn1l-group-users-manual-r-engine-and-ethernet-peripherals?r=1054571
Fixes: 7dc54d3b8d91 ("net: pcs: add Renesas MII converter driver")
Cc: stable@kernel.org
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://patch.msgid.link/20250901112019.16278-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/pcs/pcs-rzn1-miic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/pcs/pcs-rzn1-miic.c b/drivers/net/pcs/pcs-rzn1-miic.c index d0a722d43368..a7acbed14b0a 100644 --- a/drivers/net/pcs/pcs-rzn1-miic.c +++ b/drivers/net/pcs/pcs-rzn1-miic.c @@ -19,7 +19,7 @@ #define MIIC_PRCMD 0x0 #define MIIC_ESID_CODE 0x4 -#define MIIC_MODCTRL 0x20 +#define MIIC_MODCTRL 0x8 #define MIIC_MODCTRL_SW_MODE GENMASK(4, 0) #define MIIC_CONVCTRL(port) (0x100 + (port) * 4) |