[v2 03/10] ata: ahci_brcmstb: add quick for broken phy

[Jaedon Shin <jaedon.shin@gmail.com>]

Add quick for broken phy. The ARM-based 28nm chipsets have four phy
interface control registers and each port has two registers. But, The
MIPS-based 40nm chipsets have three. and there are no information and
documentation. The legacy version of broadcom's strict-ahci based
initial code did not control these registers.

Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
---
 Documentation/devicetree/bindings/ata/brcm,sata-brcmstb.txt |  1 +
 drivers/ata/ahci_brcmstb.c                                  | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/ata/brcm,sata-brcmstb.txt b/Documentation/devicetree/bindings/ata/brcm,sata-brcmstb.txt
index 488a383ce202..0f0925d58188 100644
--- a/Documentation/devicetree/bindings/ata/brcm,sata-brcmstb.txt
+++ b/Documentation/devicetree/bindings/ata/brcm,sata-brcmstb.txt
@@ -12,6 +12,7 @@ Required properties:
 
 Optional properties:
 - brcm,broken-ncq    : if present, NCQ is unusable
+- brcm,broken-phy    : if present, to control phy interface is unusable
 
 Also see ahci-platform.txt.
 
diff --git a/drivers/ata/ahci_brcmstb.c b/drivers/ata/ahci_brcmstb.c
index e53962cb48ee..c61303f7c7dc 100644
--- a/drivers/ata/ahci_brcmstb.c
+++ b/drivers/ata/ahci_brcmstb.c
@@ -71,6 +71,7 @@
 
 enum brcm_ahci_quicks {
 	BRCM_AHCI_QUICK_NONCQ		= BIT(0),
+	BRCM_AHCI_QUICK_NOPHY		= BIT(1),
 };
 
 struct brcm_ahci_priv {
@@ -119,6 +120,9 @@ static void brcm_sata_phy_enable(struct brcm_ahci_priv *priv, int port)
 	void __iomem *p;
 	u32 reg;
 
+	if (priv->quicks & BRCM_AHCI_QUICK_NOPHY)
+		return;
+
 	/* clear PHY_DEFAULT_POWER_STATE */
 	p = phyctrl + SATA_TOP_CTRL_PHY_CTRL_1;
 	reg = brcm_sata_readreg(p);
@@ -148,6 +152,9 @@ static void brcm_sata_phy_disable(struct brcm_ahci_priv *priv, int port)
 	void __iomem *p;
 	u32 reg;
 
+	if (priv->quicks & BRCM_AHCI_QUICK_NOPHY)
+		return;
+
 	/* power-off the PHY digital logic */
 	p = phyctrl + SATA_TOP_CTRL_PHY_CTRL_2;
 	reg = brcm_sata_readreg(p);
@@ -297,6 +304,9 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 	if (of_property_read_bool(dev->of_node, "brcm,broken-ncq"))
 		priv->quicks |= BRCM_AHCI_QUICK_NONCQ;
 
+	if (of_property_read_bool(dev->of_node, "brcm,broken-phy"))
+		priv->quicks |= BRCM_AHCI_QUICK_NOPHY;
+
 	brcm_sata_init(priv);
 	brcm_sata_quick(pdev, priv);
 
-- 
2.6.2