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parport_pc: Add an ECR mask field for PCI devices

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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>
This commit is contained in:
Maciej W. Rozycki 2023-01-08 21:56:54 +00:00 committed by Greg Kroah-Hartman
parent 69e8246310
commit 5f88cf276e
1 changed files with 6 additions and 1 deletions
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7
drivers/parport/parport_pc.c
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@ -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++;
}