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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2015-06-17 15:11:01 +0300
committerTejun Heo <tj@kernel.org>2015-06-17 21:25:53 +0300
commitd6ecf158148883be1588859c46d6d424513e2e0d (patch)
tree83428d4d11b732c65c3c98dc82705c9180b8edca /drivers/ata/ahci_mvebu.c
parent34c56932ce5278b8bbae13936f9df05cd59e3193 (diff)
downloadlinux-d6ecf158148883be1588859c46d6d424513e2e0d.tar.xz
ata: ahci_mvebu: add suspend/resume support
This commit adds suspend/resume support to the ahci_mvebu driver. The suspend hook doesn't do anything special despite calling the generic ahci_platform_suspend_host() function. However, the resume hook has to restore the MBus windows configuration, as well as the regret option. Tested on Marvell Armada 388 GP. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci_mvebu.c')
-rw-r--r--drivers/ata/ahci_mvebu.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/ata/ahci_mvebu.c b/drivers/ata/ahci_mvebu.c
index 23716dd8a7ec..8cbbedebadbb 100644
--- a/drivers/ata/ahci_mvebu.c
+++ b/drivers/ata/ahci_mvebu.c
@@ -62,6 +62,26 @@ static void ahci_mvebu_regret_option(struct ahci_host_priv *hpriv)
writel(0x80, hpriv->mmio + AHCI_VENDOR_SPECIFIC_0_DATA);
}
+static int ahci_mvebu_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ return ahci_platform_suspend_host(&pdev->dev);
+}
+
+static int ahci_mvebu_resume(struct platform_device *pdev)
+{
+ struct ata_host *host = platform_get_drvdata(pdev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ const struct mbus_dram_target_info *dram;
+
+ dram = mv_mbus_dram_info();
+ if (dram)
+ ahci_mvebu_mbus_config(hpriv, dram);
+
+ ahci_mvebu_regret_option(hpriv);
+
+ return ahci_platform_resume_host(&pdev->dev);
+}
+
static const struct ata_port_info ahci_mvebu_port_info = {
.flags = AHCI_FLAG_COMMON,
.pio_mask = ATA_PIO4,
@@ -120,6 +140,8 @@ MODULE_DEVICE_TABLE(of, ahci_mvebu_of_match);
static struct platform_driver ahci_mvebu_driver = {
.probe = ahci_mvebu_probe,
.remove = ata_platform_remove_one,
+ .suspend = ahci_mvebu_suspend,
+ .resume = ahci_mvebu_resume,
.driver = {
.name = DRV_NAME,
.of_match_table = ahci_mvebu_of_match,