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| author |  Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
| 2023-09-26 21:30:54 +0900 |
|---|---|---|
| committer |  Jakub Kicinski <kuba@kernel.org>
| 2023-10-03 16:00:30 -0700 |
| commit | a0c55bba0d0d0b5591083f65f830940d8ae63f31 (patch) | |
| tree | b44b7a18d407b06e8b4e2728fed0cf1ee646686f /drivers/vhost/vringh.c | |
| parent | net: nfc: llcp: Add lock when modifying device list (diff) | |
| download | linux-a0c55bba0d0d0b5591083f65f830940d8ae63f31.tar.gz linux-a0c55bba0d0d0b5591083f65f830940d8ae63f31.tar.bz2 linux-a0c55bba0d0d0b5591083f65f830940d8ae63f31.zip | |
rswitch: Fix PHY station management clock setting
Fix the MPIC.PSMCS value following the programming example in the
section 6.4.2 Management Data Clock (MDC) Setting, Ethernet MAC IP,
S4 Hardware User Manual Rev.1.00.
The value is calculated by
MPIC.PSMCS = clk[MHz] / (MDC frequency[MHz] * 2) - 1
with the input clock frequency from clk_get_rate() and MDC frequency
of 2.5MHz. Otherwise, this driver cannot communicate PHYs on the R-Car
S4 Starter Kit board.
Fixes: 3590918b5d07 ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Reported-by: Tam Nguyen <tam.nguyen.xa@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230926123054.3976752-1-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/vhost/vringh.c')
0 files changed, 0 insertions, 0 deletions