* [PATCH] net: mvneta: support suspend and resume
@ 2017-03-15 7:08 Jane Li
2017-03-15 7:18 ` Jisheng Zhang
0 siblings, 1 reply; 3+ messages in thread
From: Jane Li @ 2017-03-15 7:08 UTC (permalink / raw)
To: thomas.petazzoni; +Cc: netdev, linux-kernel, jszhang, Jane Li
Add basic support for handling suspend and resume.
Signed-off-by: Jane Li <jiel@marvell.com>
---
drivers/net/ethernet/marvell/mvneta.c | 44 +++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 61dd446..4f16342 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -4405,6 +4405,49 @@ 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 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);
+ 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 +4462,7 @@ 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
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] net: mvneta: support suspend and resume
2017-03-15 7:08 [PATCH] net: mvneta: support suspend and resume Jane Li
@ 2017-03-15 7:18 ` Jisheng Zhang
2017-03-16 3:23 ` Jane Li
0 siblings, 1 reply; 3+ messages in thread
From: Jisheng Zhang @ 2017-03-15 7:18 UTC (permalink / raw)
To: Jane Li; +Cc: thomas.petazzoni, netdev, linux-kernel
Hi Jane,
On Wed, 15 Mar 2017 15:08:34 +0800 Jane Li wrote:
> Add basic support for handling suspend and resume.
>
> Signed-off-by: Jane Li <jiel@marvell.com>
> ---
> drivers/net/ethernet/marvell/mvneta.c | 44 +++++++++++++++++++++++++++++++++++
> 1 file changed, 44 insertions(+)
>
> diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
> index 61dd446..4f16342 100644
> --- a/drivers/net/ethernet/marvell/mvneta.c
> +++ b/drivers/net/ethernet/marvell/mvneta.c
> @@ -4405,6 +4405,49 @@ 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 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);
we may miss the necessary registers setting in mvneta_bm_port_init() and
mvneta_conf_mbus_windows(). those registers also need to be restored.
> + mvneta_defaults_set(pp);
before restore the default setting, is it safer to mvneta_port_disable()?
Thanks,
Jisheng
> + 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 +4462,7 @@ static int mvneta_remove(struct platform_device *pdev)
> .driver = {
> .name = MVNETA_DRIVER_NAME,
> .of_match_table = mvneta_match,
> + .pm = &mvneta_pm_ops,
> },
> };
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] net: mvneta: support suspend and resume
2017-03-15 7:18 ` Jisheng Zhang
@ 2017-03-16 3:23 ` Jane Li
0 siblings, 0 replies; 3+ messages in thread
From: Jane Li @ 2017-03-16 3:23 UTC (permalink / raw)
To: Jisheng Zhang; +Cc: thomas.petazzoni, netdev, linux-kernel
Hi Jisheng,
On 2017年03月15日 15:18, Jisheng Zhang wrote:
> Hi Jane,
>
> On Wed, 15 Mar 2017 15:08:34 +0800 Jane Li wrote:
>
>> Add basic support for handling suspend and resume.
>>
>> Signed-off-by: Jane Li <jiel@marvell.com>
>> ---
>> drivers/net/ethernet/marvell/mvneta.c | 44 +++++++++++++++++++++++++++++++++++
>> 1 file changed, 44 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
>> index 61dd446..4f16342 100644
>> --- a/drivers/net/ethernet/marvell/mvneta.c
>> +++ b/drivers/net/ethernet/marvell/mvneta.c
>> @@ -4405,6 +4405,49 @@ 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 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);
> we may miss the necessary registers setting in mvneta_bm_port_init() and
> mvneta_conf_mbus_windows(). those registers also need to be restored.
>
Done. Add them in patch v2.
>> + mvneta_defaults_set(pp);
> before restore the default setting, is it safer to mvneta_port_disable()?
>
> Thanks,
> Jisheng
During suspend, mvneta_port_disable() has been executed as bellow path.
It seems it is not need to do mvneta_port_disable() during resume.
mvneta_suspend() -> mvneta_stop() -> mvneta_stop_dev() ->
mvneta_port_disable()
Thanks,
Jane
>> + 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 +4462,7 @@ static int mvneta_remove(struct platform_device *pdev)
>> .driver = {
>> .name = MVNETA_DRIVER_NAME,
>> .of_match_table = mvneta_match,
>> + .pm = &mvneta_pm_ops,
>> },
>> };
>>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-03-15 7:18 ` Jisheng Zhang
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