[PATCH v2 08/13] phy: ti-pipe3: Fix suspend/resume and module reload

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Due to Errata i783, SATA breaks if its DPLL is idled. The recommeded
workaround to issue a softreset to the SATA controller doesn't seem to
work. Here we just prevent SATA DPLL from Idling and hence avoid
the issue altogether.

Signed-off-by: Roger Quadros <rogerq@xxxxxx>
---
 drivers/phy/phy-ti-pipe3.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index 12cc900..5913676 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -238,6 +238,10 @@ static int ti_pipe3_exit(struct phy *x)
 	u32 val;
 	unsigned long timeout;
 
+	/* SATA DPLL can't be powered down due to Errata i783 */
+	if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata"))
+		return 0;
+
 	/* Put DPLL in IDLE mode */
 	val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
 	val |= PLL_IDLE;
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux