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Message-Id: <20221123124835.18937-6-rogerq@kernel.org>
Date: Wed, 23 Nov 2022 14:48:34 +0200
From: Roger Quadros <rogerq@...nel.org>
To: davem@...emloft.net, maciej.fijalkowski@...el.com, kuba@...nel.org
Cc: edumazet@...gle.com, pabeni@...hat.com, vigneshr@...com,
linux-omap@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, Roger Quadros <rogerq@...nel.org>
Subject: [PATCH v3 net-next 5/6] net: ethernet: ti: am65-cpsw: retain PORT_VLAN_REG after suspend/resume
During suspend resume the context of PORT_VLAN_REG is lost so
save it during suspend and restore it during resume for
host port and slave ports.
Signed-off-by: Roger Quadros <rogerq@...nel.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
---
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 7 +++++++
drivers/net/ethernet/ti/am65-cpsw-nuss.h | 4 ++++
2 files changed, 11 insertions(+)
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 0b59088e3728..f5357afde527 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2875,7 +2875,9 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
struct am65_cpsw_port *port;
struct net_device *ndev;
int i, ret;
+ struct am65_cpsw_host *host_p = am65_common_get_host(common);
+ host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
for (i = 0; i < common->port_num; i++) {
port = &common->ports[i];
ndev = port->ndev;
@@ -2883,6 +2885,7 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
if (!ndev)
continue;
+ port->vid_context = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
netif_device_detach(ndev);
if (netif_running(ndev)) {
rtnl_lock();
@@ -2909,6 +2912,7 @@ static int am65_cpsw_nuss_resume(struct device *dev)
struct am65_cpsw_port *port;
struct net_device *ndev;
int i, ret;
+ struct am65_cpsw_host *host_p = am65_common_get_host(common);
ret = am65_cpsw_nuss_init_tx_chns(common);
if (ret)
@@ -2941,8 +2945,11 @@ static int am65_cpsw_nuss_resume(struct device *dev)
}
netif_device_attach(ndev);
+ writel(port->vid_context, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
}
+ writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
+
return 0;
}
#endif /* CONFIG_PM_SLEEP */
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
index 2c9850fdfcb6..e95cc37a7286 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
@@ -55,12 +55,16 @@ struct am65_cpsw_port {
bool rx_ts_enabled;
struct am65_cpsw_qos qos;
struct devlink_port devlink_port;
+ /* Only for suspend resume context */
+ u32 vid_context;
};
struct am65_cpsw_host {
struct am65_cpsw_common *common;
void __iomem *port_base;
void __iomem *stat_base;
+ /* Only for suspend resume context */
+ u32 vid_context;
};
struct am65_cpsw_tx_chn {
--
2.17.1
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