diff options
| author | Oliver O'Halloran <oohall@gmail.com> | 2019-09-03 12:16:01 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-09-05 06:22:39 +0200 |
| commit | 018c49e999ac4680e59de236a4a8cde209e8cc98 (patch) | |
| tree | a84ec67a601918e7486fb449078a2cec91cc3b2c /drivers/pci/hotplug | |
| parent | pci-hotplug/pnv_php: Add support for IODA3 Power9 PHBs (diff) | |
| download | linux-018c49e999ac4680e59de236a4a8cde209e8cc98.tar.xz linux-018c49e999ac4680e59de236a4a8cde209e8cc98.zip | |
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.c | 14 |
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; } |