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[3/4] PCI: imx6: remove broken Gen2 workaround

Message ID 1452884210-11359-4-git-send-email-l.stach@pengutronix.de (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Lucas Stach Jan. 15, 2016, 6:56 p.m. UTC 
This removes the remnants of the workaround for erratum ERR005184
which was never completely implemented. The checks alone don't
carry any value as we don't act properly on the result.

A proper implementation of the workaround should be added to
the lane speed change in establish_link later.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 drivers/pci/host/pci-imx6.c | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)
diff mbox

Patch

diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 3bb8ccc68792..f38aa7678868 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -467,7 +467,7 @@  static void imx6_pcie_host_init(struct pcie_port *pp)
 
 static int imx6_pcie_link_up(struct pcie_port *pp)
 {
-	u32 rc, debug_r0, rx_valid;
+	u32 rc;
 	int count = 5;
 
 	/*
@@ -501,21 +501,6 @@  static int imx6_pcie_link_up(struct pcie_port *pp)
 		 */
 		usleep_range(1000, 2000);
 	}
-	/*
-	 * From L0, initiate MAC entry to gen2 if EP/RC supports gen2.
-	 * Wait 2ms (LTSSM timeout is 24ms, PHY lock is ~5us in gen2).
-	 * If (MAC/LTSSM.state == Recovery.RcvrLock)
-	 * && (PHY/rx_valid==0) then pulse PHY/rx_reset. Transition
-	 * to gen2 is stuck
-	 */
-	pcie_phy_read(pp->dbi_base, PCIE_PHY_RX_ASIC_OUT, &rx_valid);
-	debug_r0 = readl(pp->dbi_base + PCIE_PHY_DEBUG_R0);
-
-	if (rx_valid & PCIE_PHY_RX_ASIC_OUT_VALID)
-		return 0;
-
-	if ((debug_r0 & 0x3f) != 0x0d)
-		return 0;
 
 	return 0;
 }