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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2026-04-01 21:36:08 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-04-04 02:04:28 +0300 |
| commit | 353d8e7989b6babe8fe4ae06272230c7941c3f73 (patch) | |
| tree | e141442d4f78fd8e6864db6c3af69c206f9b59eb | |
| parent | 48a5e77b49ff304f5ad76d07c864e4b2257493c3 (diff) | |
| download | linux-353d8e7989b6babe8fe4ae06272230c7941c3f73.tar.xz | |
net: ethernet: ravb: Suspend and resume the transmission flow
The current driver does not follow the latest datasheet and does not
suspend the flow when stopping DMA and resume it when starting. Update
the driver to do so.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
[Niklas: Rebase from BSP and reword commit message]
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://patch.msgid.link/20260401183608.1852225-1-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb_main.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 2c725824b348..1dbfadb2a881 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -694,6 +694,9 @@ static int ravb_dmac_init(struct net_device *ndev) const struct ravb_hw_info *info = priv->info; int error; + /* Clear transmission suspension */ + ravb_modify(ndev, CCC, CCC_DTSR, 0); + /* Set CONFIG mode */ error = ravb_set_opmode(ndev, CCC_OPC_CONFIG); if (error) @@ -1103,6 +1106,12 @@ static int ravb_stop_dma(struct net_device *ndev) if (error) return error; + /* Request for transmission suspension */ + ravb_modify(ndev, CCC, CCC_DTSR, CCC_DTSR); + error = ravb_wait(ndev, CSR, CSR_DTS, CSR_DTS); + if (error) + netdev_err(ndev, "failed to stop AXI BUS\n"); + /* Stop AVB-DMAC process */ return ravb_set_opmode(ndev, CCC_OPC_CONFIG); } |