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net: qcom/emac: add shutdown function

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The shutdown function halts all DMA and interrupts, so that all
operations are discontinued when the system shuts down, e.g. via
kexec or a forced reboot.

Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Timur Tabi 2017-06-23 14:33:28 -05:00 committed by David S. Miller
parent e3c42b61ff
commit 03eb3eb4d4
1 changed files with 14 additions and 0 deletions
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14
drivers/net/ethernet/qualcomm/emac/emac.c
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@ -762,6 +762,19 @@ static int emac_remove(struct platform_device *pdev)
return 0; return 0;
} }
static void emac_shutdown(struct platform_device *pdev)
{
struct net_device *netdev = dev_get_drvdata(&pdev->dev);
struct emac_adapter *adpt = netdev_priv(netdev);
struct emac_sgmii *sgmii = &adpt->phy;
/* Closing the SGMII turns off its interrupts */
sgmii->close(adpt);
/* Resetting the MAC turns off all DMA and its interrupts */
emac_mac_reset(adpt);
}
static struct platform_driver emac_platform_driver = { static struct platform_driver emac_platform_driver = {
.probe = emac_probe, .probe = emac_probe,
.remove = emac_remove, .remove = emac_remove,
@ -770,6 +783,7 @@ static struct platform_driver emac_platform_driver = {
.of_match_table = emac_dt_match, .of_match_table = emac_dt_match,
.acpi_match_table = ACPI_PTR(emac_acpi_match), .acpi_match_table = ACPI_PTR(emac_acpi_match),
}, },
.shutdown = emac_shutdown,
}; };
module_platform_driver(emac_platform_driver); module_platform_driver(emac_platform_driver);