---

yaml --- r: 294715 b: refs/heads/master c: 7f82299 h: refs/heads/master i: 294713: 438dc35 294711: b2e0a52 v: v3
git-mirror · Feb 14, 2012 · 2d4ce49 · 2d4ce49
1 parent ae938fa
commit 2d4ce49
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Showing 2 changed files with 37 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bffe4f72fcdd92bfb24909d586d1636e5cec500d
+refs/heads/master: 7f822999e12a144e68c915194267108f8051cf9b
diff --git a/trunk/drivers/pci/hotplug/pciehp_hpc.c b/trunk/drivers/pci/hotplug/pciehp_hpc.c
@@ -352,6 +352,42 @@ int pciehp_check_link_status(struct controller *ctrl)
 	return retval;
 }
 
+static int __pciehp_link_set(struct controller *ctrl, bool enable)
+{
+	u16 lnk_ctrl;
+	int retval = 0;
+
+	retval = pciehp_readw(ctrl, PCI_EXP_LNKCTL, &lnk_ctrl);
+	if (retval) {
+		ctrl_err(ctrl, "Cannot read LNKCTRL register\n");
+		return retval;
+	}
+
+	if (enable)
+		lnk_ctrl &= ~PCI_EXP_LNKCTL_LD;
+	else
+		lnk_ctrl |= PCI_EXP_LNKCTL_LD;
+
+	retval = pciehp_writew(ctrl, PCI_EXP_LNKCTL, lnk_ctrl);
+	if (retval) {
+		ctrl_err(ctrl, "Cannot write LNKCTRL register\n");
+		return retval;
+	}
+	ctrl_dbg(ctrl, "%s: lnk_ctrl = %x\n", __func__, lnk_ctrl);
+
+	return retval;
+}
+
+static int pciehp_link_enable(struct controller *ctrl)
+{
+	return __pciehp_link_set(ctrl, true);
+}
+
+static int pciehp_link_disable(struct controller *ctrl)
+{
+	return __pciehp_link_set(ctrl, false);
+}
+
 int pciehp_get_attention_status(struct slot *slot, u8 *status)
 {
 	struct controller *ctrl = slot->ctrl;