[PATCH 5/8] ata: ahci_brcm: Manage reset line during suspend/resume

[Florian Fainelli]

We were not managing the reset line during suspend/resume, but this
needs to be done to ensure that the controller can exit low power modes
correctly, especially with deep sleep suspend mode that may reset parts
of the logic.

Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
 drivers/ata/ahci_brcm.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
index 66a570d0da83..76612577a59a 100644
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -343,10 +343,16 @@ static int brcm_ahci_suspend(struct device *dev)
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
 	struct brcm_ahci_priv *priv = hpriv->plat_data;
+	int ret;
 
 	brcm_sata_phys_disable(priv);
 
-	return ahci_platform_suspend(dev);
+	ret = ahci_platform_suspend(dev);
+
+	if (!IS_ERR_OR_NULL(priv->rcdev))
+		reset_control_assert(priv->rcdev);
+
+	return ret;
 }
 
 static int brcm_ahci_resume(struct device *dev)
@@ -354,7 +360,12 @@ static int brcm_ahci_resume(struct device *dev)
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
 	struct brcm_ahci_priv *priv = hpriv->plat_data;
-	int ret;
+	int ret = 0;
+
+	if (!IS_ERR_OR_NULL(priv->rcdev))
+		ret = reset_control_deassert(priv->rcdev);
+	if (ret)
+		return ret;
 
 	/* Make sure clocks are turned on before re-configuration */
 	ret = ahci_platform_enable_clks(hpriv);
-- 
2.17.1