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authorFlorian Fainelli <f.fainelli@gmail.com>2014-09-18 17:31:22 -0700
committerDavid S. Miller <davem@davemloft.net>2014-09-22 14:41:23 -0400
commit2446254915a7d6f08bba9a755a34cc0402880472 (patch)
tree2b27382c1139a4a9e2b012fa7a9b9604e51bb031 /net/dsa
parent34f6b8745d421683ca0a268540869eb30721e970 (diff)
net: dsa: allow switch drivers to implement suspend/resume hooks
Add an abstraction layer to suspend/resume switch devices, doing the following split: - suspend/resume the slave network devices and their corresponding PHY devices - suspend/resume the switch hardware using switch driver callbacks Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/dsa.c80
-rw-r--r--net/dsa/dsa_priv.h2
-rw-r--r--net/dsa/slave.c31
3 files changed, 113 insertions, 0 deletions
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 6e40928ec0e7..6905f2d84c44 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -238,6 +238,49 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
{
}
+static int dsa_switch_suspend(struct dsa_switch *ds)
+{
+ int i, ret = 0;
+
+ /* Suspend slave network devices */
+ for (i = 0; i < DSA_MAX_PORTS; i++) {
+ if (!(ds->phys_port_mask & (1 << i)))
+ continue;
+
+ ret = dsa_slave_suspend(ds->ports[i]);
+ if (ret)
+ return ret;
+ }
+
+ if (ds->drv->suspend)
+ ret = ds->drv->suspend(ds);
+
+ return ret;
+}
+
+static int dsa_switch_resume(struct dsa_switch *ds)
+{
+ int i, ret = 0;
+
+ if (ds->drv->resume)
+ ret = ds->drv->resume(ds);
+
+ if (ret)
+ return ret;
+
+ /* Resume slave network devices */
+ for (i = 0; i < DSA_MAX_PORTS; i++) {
+ if (!(ds->phys_port_mask & (1 << i)))
+ continue;
+
+ ret = dsa_slave_resume(ds->ports[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
/* link polling *************************************************************/
static void dsa_link_poll_work(struct work_struct *ugly)
@@ -650,6 +693,42 @@ static struct packet_type dsa_pack_type __read_mostly = {
.func = dsa_switch_rcv,
};
+#ifdef CONFIG_PM_SLEEP
+static int dsa_suspend(struct device *d)
+{
+ struct platform_device *pdev = to_platform_device(d);
+ struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
+ int i, ret = 0;
+
+ for (i = 0; i < dst->pd->nr_chips; i++) {
+ struct dsa_switch *ds = dst->ds[i];
+
+ if (ds != NULL)
+ ret = dsa_switch_suspend(ds);
+ }
+
+ return ret;
+}
+
+static int dsa_resume(struct device *d)
+{
+ struct platform_device *pdev = to_platform_device(d);
+ struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
+ int i, ret = 0;
+
+ for (i = 0; i < dst->pd->nr_chips; i++) {
+ struct dsa_switch *ds = dst->ds[i];
+
+ if (ds != NULL)
+ ret = dsa_switch_resume(ds);
+ }
+
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
+
static const struct of_device_id dsa_of_match_table[] = {
{ .compatible = "brcm,bcm7445-switch-v4.0" },
{ .compatible = "marvell,dsa", },
@@ -665,6 +744,7 @@ static struct platform_driver dsa_driver = {
.name = "dsa",
.owner = THIS_MODULE,
.of_match_table = dsa_of_match_table,
+ .pm = &dsa_pm_ops,
},
};
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index f90899e8ab5a..dc9756d3154c 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -56,6 +56,8 @@ void dsa_slave_mii_bus_init(struct dsa_switch *ds);
struct net_device *dsa_slave_create(struct dsa_switch *ds,
struct device *parent,
int port, char *name);
+int dsa_slave_suspend(struct net_device *slave_dev);
+int dsa_slave_resume(struct net_device *slave_dev);
/* tag_dsa.c */
extern const struct dsa_device_ops dsa_netdev_ops;
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index a7997265019a..143811ef57ae 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -412,6 +412,37 @@ static void dsa_slave_phy_setup(struct dsa_slave_priv *p,
p->phy->addr, p->phy->drv->name);
}
+int dsa_slave_suspend(struct net_device *slave_dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(slave_dev);
+
+ netif_device_detach(slave_dev);
+
+ if (p->phy) {
+ phy_stop(p->phy);
+ p->old_pause = -1;
+ p->old_link = -1;
+ p->old_duplex = -1;
+ phy_suspend(p->phy);
+ }
+
+ return 0;
+}
+
+int dsa_slave_resume(struct net_device *slave_dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(slave_dev);
+
+ netif_device_attach(slave_dev);
+
+ if (p->phy) {
+ phy_resume(p->phy);
+ phy_start(p->phy);
+ }
+
+ return 0;
+}
+
struct net_device *
dsa_slave_create(struct dsa_switch *ds, struct device *parent,
int port, char *name)

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