[PATCH 6/6] pci/hotplug/pnv_php: Enable third attention indicator

[PATCH 6/6] pci/hotplug/pnv_php: Enable third attention indicator

[Timothy Pearson]

 state

The PCIe specification allows three attention indicator states,
on, off, and blink.  Enable all three states instead of basic
on / off control.

Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
---
 drivers/pci/hotplug/pnv_php.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 32f26f0d1ca6..c9003dec91c3 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -3,6 +3,7 @@
  * PCI Hotplug Driver for PowerPC PowerNV platform.
  *
  * Copyright Gavin Shan, IBM Corporation 2016.
+ * Copyright (C) 2025 Raptor Engineering, LLC
  */
 
 #include <linux/bitfield.h>
@@ -439,10 +440,23 @@ static int pnv_php_get_adapter_state(struct hotplug_slot *slot, u8 *state)
 	return ret;
 }
 
+static int pnv_php_get_raw_indicator_status(struct hotplug_slot *slot, u8 *state)
+{
+	struct pnv_php_slot *php_slot = to_pnv_php_slot(slot);
+	struct pci_dev *bridge = php_slot->pdev;
+	u16 status;
+
+	pcie_capability_read_word(bridge, PCI_EXP_SLTCTL, &status);
+	*state = (status & (PCI_EXP_SLTCTL_AIC | PCI_EXP_SLTCTL_PIC)) >> 6;
+	return 0;
+}
+
+
 static int pnv_php_get_attention_state(struct hotplug_slot *slot, u8 *state)
 {
 	struct pnv_php_slot *php_slot = to_pnv_php_slot(slot);
 
+	pnv_php_get_raw_indicator_status(slot, &php_slot->attention_state);
 	*state = php_slot->attention_state;
 	return 0;
 }
@@ -460,7 +474,7 @@ static int pnv_php_set_attention_state(struct hotplug_slot *slot, u8 state)
 	mask = PCI_EXP_SLTCTL_AIC;
 
 	if (state)
-		new = PCI_EXP_SLTCTL_ATTN_IND_ON;
+		new = FIELD_PREP(PCI_EXP_SLTCTL_AIC, state);
 	else
 		new = PCI_EXP_SLTCTL_ATTN_IND_OFF;
 
-- 
2.39.5