Commit 1581cd8b authored by Roger Quadros's avatar Roger Quadros Committed by Jakub Kicinski
Browse files

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: default avatarRoger Quadros <rogerq@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 24bc19b0

drivers/net/ethernet/ti/am65-cpsw-nuss.c

+7 −0
Original line number Diff line number Diff line
@@ -2872,10 +2872,12 @@ static int am65_cpsw_nuss_remove(struct platform_device *pdev) 
static int am65_cpsw_nuss_suspend(struct device *dev)

{

	struct am65_cpsw_common *common = dev_get_drvdata(dev);

	struct am65_cpsw_host *host_p = am65_common_get_host(common);

	struct am65_cpsw_port *port;

	struct net_device *ndev;

	int i, ret;



	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 */

drivers/net/ethernet/ti/am65-cpsw-nuss.h

+4 −0
Original line number Diff line number Diff line
@@ -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 {