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authorOliver O'Halloran <oohall@gmail.com>2019-09-03 20:16:01 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2019-09-05 14:22:39 +1000
commit018c49e999ac4680e59de236a4a8cde209e8cc98 (patch)
treea84ec67a601918e7486fb449078a2cec91cc3b2c /drivers/pci/hotplug
parenta839bd87a250068521393ca3804f4a5274e103ff (diff)
pci-hotplug/pnv_php: Add attention indicator support
pnv_php is generally used with PCIe bridges which provide a native interface for setting the attention and power indicator LEDs. Wire up those interfaces even if firmware does not have support for them (yet...) Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190903101605.2890-11-oohall@gmail.com
Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/pnv_php.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 6fdf8b74cb0a..d7b2b47bc33e 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -419,9 +419,21 @@ static int pnv_php_get_attention_state(struct hotplug_slot *slot, u8 *state)
static int pnv_php_set_attention_state(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 new, mask;
- /* FIXME: Make it real once firmware supports it */
php_slot->attention_state = state;
+ if (!bridge)
+ return 0;
+
+ mask = PCI_EXP_SLTCTL_AIC;
+
+ if (state)
+ new = PCI_EXP_SLTCTL_ATTN_IND_ON;
+ else
+ new = PCI_EXP_SLTCTL_ATTN_IND_OFF;
+
+ pcie_capability_clear_and_set_word(bridge, PCI_EXP_SLTCTL, mask, new);
return 0;
}