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Date: Thu, 16 Mar 2017 11:19:10 +0800
From: Jane Li <jiel@...vell.com>
To: <thomas.petazzoni@...e-electrons.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<jszhang@...vell.com>, Jane Li <jiel@...vell.com>
Subject: [PATCH v2] net: mvneta: support suspend and resume
Add basic support for handling suspend and resume.
Signed-off-by: Jane Li <jiel@...vell.com>
---
Since v1:
- add mvneta_conf_mbus_windows() and mvneta_bm_port_init() in mvneta_resume()
drivers/net/ethernet/marvell/mvneta.c | 62 ++++++++++++++++++++++++++++++++---
1 file changed, 58 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 61dd446..250017b 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -431,6 +431,7 @@ struct mvneta_port {
/* Flags for special SoC configurations */
bool neta_armada3700;
u16 rx_offset_correction;
+ const struct mbus_dram_target_info *dram_target_info;
};
/* The mvneta_tx_desc and mvneta_rx_desc structures describe the
@@ -4118,7 +4119,6 @@ static int mvneta_port_power_up(struct mvneta_port *pp, int phy_mode)
/* Device initialization routine */
static int mvneta_probe(struct platform_device *pdev)
{
- const struct mbus_dram_target_info *dram_target_info;
struct resource *res;
struct device_node *dn = pdev->dev.of_node;
struct device_node *phy_node;
@@ -4267,13 +4267,13 @@ static int mvneta_probe(struct platform_device *pdev)
pp->tx_csum_limit = tx_csum_limit;
- dram_target_info = mv_mbus_dram_info();
+ pp->dram_target_info = mv_mbus_dram_info();
/* Armada3700 requires setting default configuration of Mbus
* windows, however without using filled mbus_dram_target_info
* structure.
*/
- if (dram_target_info || pp->neta_armada3700)
- mvneta_conf_mbus_windows(pp, dram_target_info);
+ if (pp->dram_target_info || pp->neta_armada3700)
+ mvneta_conf_mbus_windows(pp, pp->dram_target_info);
pp->tx_ring_size = MVNETA_MAX_TXD;
pp->rx_ring_size = MVNETA_MAX_RXD;
@@ -4405,6 +4405,59 @@ static int mvneta_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int mvneta_suspend(struct device *device)
+{
+ struct net_device *dev = dev_get_drvdata(device);
+ struct mvneta_port *pp = netdev_priv(dev);
+
+ if (netif_running(dev))
+ mvneta_stop(dev);
+ netif_device_detach(dev);
+ clk_disable_unprepare(pp->clk_bus);
+ clk_disable_unprepare(pp->clk);
+ return 0;
+}
+
+static int mvneta_resume(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct net_device *dev = dev_get_drvdata(device);
+ struct mvneta_port *pp = netdev_priv(dev);
+ int err;
+
+ clk_prepare_enable(pp->clk);
+ clk_prepare_enable(pp->clk_bus);
+ if (pp->dram_target_info || pp->neta_armada3700)
+ mvneta_conf_mbus_windows(pp, pp->dram_target_info);
+ if (pp->bm_priv) {
+ err = mvneta_bm_port_init(pdev, pp);
+ if (err < 0) {
+ dev_info(&pdev->dev, "use SW buffer management\n");
+ pp->bm_priv = NULL;
+ }
+ }
+ mvneta_defaults_set(pp);
+ err = mvneta_port_power_up(pp, pp->phy_interface);
+ if (err < 0) {
+ dev_err(device, "can't power up port\n");
+ return err;
+ }
+
+ if (pp->use_inband_status)
+ mvneta_fixed_link_update(pp, dev->phydev);
+
+ netif_device_attach(dev);
+ if (netif_running(dev))
+ mvneta_open(dev);
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops mvneta_pm_ops = {
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(mvneta_suspend, mvneta_resume)
+};
+
static const struct of_device_id mvneta_match[] = {
{ .compatible = "marvell,armada-370-neta" },
{ .compatible = "marvell,armada-xp-neta" },
@@ -4419,6 +4472,7 @@ static int mvneta_remove(struct platform_device *pdev)
.driver = {
.name = MVNETA_DRIVER_NAME,
.of_match_table = mvneta_match,
+ .pm = &mvneta_pm_ops,
},
};
--
1.9.1
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