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147 lines
4.9 KiB
Diff
147 lines
4.9 KiB
Diff
From 33a23e223749c45ff8099ff9baa235301a3ad07f Mon Sep 17 00:00:00 2001
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From: Srinivas Kandagatla <srinivas.kandagatla@st.com>
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Date: Thu, 16 Jan 2014 10:52:44 +0000
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Subject: [PATCH] net: stmmac: use suspend functions for hibernation
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In hibernation freeze case the driver just releases the resources like
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dma buffers, irqs, unregisters the drivers and during restore it does
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register, request the resources. This is not really necessary, as part
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of power management all the data structures are intact, all the
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previously allocated resources can be used after coming out of low
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power.
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This patch uses the suspend and resume callbacks for freeze and
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restore which initializes the hardware correctly without unregistering
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or releasing the resources, this should also help in reducing the time
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to restore.
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Also this patch fixes a bug in stmmac_pltfr_restore and
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stmmac_pltfr_freeze where it tries to get hold of platform data via
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dev_get_platdata call, which would return NULL in device tree cases and
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the next if statement would crash as there is no NULL check.
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
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Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 -
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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 16 --------
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.../net/ethernet/stmicro/stmmac/stmmac_platform.c | 44 ++++++----------------
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3 files changed, 12 insertions(+), 50 deletions(-)
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diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
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index 5a568015..027f1dd 100644
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--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
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+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
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@@ -117,8 +117,6 @@ struct stmmac_priv {
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extern const struct stmmac_hwtimestamp stmmac_ptp;
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int stmmac_ptp_register(struct stmmac_priv *priv);
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void stmmac_ptp_unregister(struct stmmac_priv *priv);
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-int stmmac_freeze(struct net_device *ndev);
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-int stmmac_restore(struct net_device *ndev);
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int stmmac_resume(struct net_device *ndev);
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int stmmac_suspend(struct net_device *ndev);
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int stmmac_dvr_remove(struct net_device *ndev);
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diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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index 742a83f..c1298a0 100644
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--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@@ -2912,22 +2912,6 @@ int stmmac_resume(struct net_device *ndev)
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return 0;
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}
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-
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-int stmmac_freeze(struct net_device *ndev)
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-{
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- if (!ndev || !netif_running(ndev))
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- return 0;
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-
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- return stmmac_release(ndev);
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-}
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-
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-int stmmac_restore(struct net_device *ndev)
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-{
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- if (!ndev || !netif_running(ndev))
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- return 0;
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-
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- return stmmac_open(ndev);
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-}
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#endif /* CONFIG_PM */
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/* Driver can be configured w/ and w/ both PCI and Platf drivers
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diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
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index 9377ee6..6d0bf22 100644
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--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
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+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
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@@ -211,55 +211,35 @@ static int stmmac_pltfr_remove(struct platform_device *pdev)
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#ifdef CONFIG_PM
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static int stmmac_pltfr_suspend(struct device *dev)
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{
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- struct net_device *ndev = dev_get_drvdata(dev);
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-
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- return stmmac_suspend(ndev);
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-}
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-
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-static int stmmac_pltfr_resume(struct device *dev)
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-{
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- struct net_device *ndev = dev_get_drvdata(dev);
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-
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- return stmmac_resume(ndev);
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-}
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-
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-static int stmmac_pltfr_freeze(struct device *dev)
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-{
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int ret;
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- struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
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struct net_device *ndev = dev_get_drvdata(dev);
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+ struct stmmac_priv *priv = netdev_priv(ndev);
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struct platform_device *pdev = to_platform_device(dev);
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- ret = stmmac_freeze(ndev);
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- if (plat_dat->exit)
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- plat_dat->exit(pdev);
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+ ret = stmmac_suspend(ndev);
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+ if (priv->plat->exit)
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+ priv->plat->exit(pdev);
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return ret;
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}
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-static int stmmac_pltfr_restore(struct device *dev)
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+static int stmmac_pltfr_resume(struct device *dev)
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{
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- struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
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struct net_device *ndev = dev_get_drvdata(dev);
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+ struct stmmac_priv *priv = netdev_priv(ndev);
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struct platform_device *pdev = to_platform_device(dev);
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- if (plat_dat->init)
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- plat_dat->init(pdev);
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+ if (priv->plat->init)
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+ priv->plat->init(pdev);
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- return stmmac_restore(ndev);
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+ return stmmac_resume(ndev);
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}
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-static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
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- .suspend = stmmac_pltfr_suspend,
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- .resume = stmmac_pltfr_resume,
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- .freeze = stmmac_pltfr_freeze,
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- .thaw = stmmac_pltfr_restore,
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- .restore = stmmac_pltfr_restore,
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-};
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-#else
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-static const struct dev_pm_ops stmmac_pltfr_pm_ops;
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#endif /* CONFIG_PM */
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+static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops,
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+ stmmac_pltfr_suspend, stmmac_pltfr_resume);
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+
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static const struct of_device_id stmmac_dt_ids[] = {
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{ .compatible = "st,spear600-gmac"},
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{ .compatible = "snps,dwmac-3.610"},
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--
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1.8.5.5
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