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gpib: Don't use extended registers

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When the chip type is 72310 then avoid accessing extended registers
Apart from the BSR the 72310 supports only the standard NEC u7210
registers.

Signed-off-by: Dave Penkler <dpenkler@gmail.com>
Link: https://patch.msgid.link/20260411172511.26546-4-dpenkler@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Penkler 2026-04-11 19:25:08 +02:00 committed by Greg Kroah-Hartman
parent 3be376ac8f
commit 1b2bfb7ac2
1 changed files with 6 additions and 0 deletions
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6
drivers/gpib/ines/ines_gpib.c
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@ -103,6 +103,9 @@ static int ines_t1_delay(struct gpib_board *board, unsigned int nano_sec)
retval = nec7210_t1_delay(board, nec_priv, nano_sec);
if (ines_priv->pci_chip_type == PCI_CHIP_INES_72130)
return retval;
if (nano_sec <= 250) {
write_byte(nec_priv, INES_AUXD | INES_FOLLOWING_T1_250ns |
INES_INITIAL_T1_2000ns, AUXMR);
@ -322,6 +325,8 @@ static irqreturn_t ines_interrupt(struct gpib_board *board)
spin_lock_irqsave(&board->spinlock, flags);
nec7210_interrupt(board, nec_priv);
if (priv->pci_chip_type == PCI_CHIP_INES_72130)
goto out;
isr3_bits = ines_inb(priv, ISR3);
isr4_bits = ines_inb(priv, ISR4);
if (isr3_bits & IFC_ACTIVE_BIT) {
@ -339,6 +344,7 @@ static irqreturn_t ines_interrupt(struct gpib_board *board)
if (wake)
wake_up_interruptible(&board->wait);
out:
spin_unlock_irqrestore(&board->spinlock, flags);
return IRQ_HANDLED;
}