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authorMaciej W. Rozycki <macro@orcam.me.uk>2023-01-08 22:56:54 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-01-20 13:12:00 +0100
commit5f88cf276e880df7b6e9abc301eef214aa74bf53 (patch)
tree080d141b939c35a12122529151e7a135d235114b /drivers/parport
parentparport_pc: Add a mode mask field for PCI devices (diff)
downloadlinux-5f88cf276e880df7b6e9abc301eef214aa74bf53.tar.xz
linux-5f88cf276e880df7b6e9abc301eef214aa74bf53.zip
parport_pc: Add an ECR mask field for PCI devices
Add a bitmask field specifying writable ECR bits for PCI devices and apply it via `__parport_pc_probe_port'. Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Link: https://lore.kernel.org/r/20230108215656.6433-5-sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/parport')
-rw-r--r--drivers/parport/parport_pc.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 2928f36e05ff..d7e64f6dfe90 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -2662,6 +2662,10 @@ static struct parport_pc_pci {
/* Bit field of parport modes to exclude. */
unsigned int mode_mask;
+ /* If non-zero, sets the bitmask of writable ECR bits. In that
+ * case additionally bit 0 will be forcibly set on writes. */
+ unsigned char ecr_writable;
+
/* If set, this is called immediately after pci_enable_device.
* If it returns non-zero, no probing will take place and the
* ports will not be used. */
@@ -2868,7 +2872,8 @@ static int parport_pc_pci_probe(struct pci_dev *dev,
__parport_pc_probe_port(io_lo, io_hi, irq,
PARPORT_DMA_NONE, &dev->dev,
IRQF_SHARED,
- cards[i].mode_mask, 0);
+ cards[i].mode_mask,
+ cards[i].ecr_writable);
if (data->ports[count])
count++;
}