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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
This commit is contained in:
Oliver O'Halloran 2019-09-03 20:16:01 +10:00 committed by Michael Ellerman
parent a839bd87a2
commit 018c49e999
1 changed files with 13 additions and 1 deletions
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14
drivers/pci/hotplug/pnv_php.c
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@ -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;
}