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sh: intc: Add IRQ trigger bit field check

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R-Mobile SoCs such as sh73a0 include PINT blocks in INTC
that come with 2-bit IRQ trigger support. Add code to make
sure the bit width is checked so 4-bit only modes like for
instance EDGE_BOTH will fail for PINT.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2011-10-17 17:59:54 +09:00 committed by Paul Mundt
parent a136d3d85f
commit 52e3124f24
1 changed files with 7 additions and 2 deletions
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9
drivers/sh/intc/chip.c
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@ -202,11 +202,16 @@ static int intc_set_type(struct irq_data *data, unsigned int type)
if (!value)
return -EINVAL;
value &= ~SENSE_VALID_FLAG;
ihp = intc_find_irq(d->sense, d->nr_sense, irq);
if (ihp) {
/* PINT has 2-bit sense registers, should fail on EDGE_BOTH */
if (value >= (1 << _INTC_WIDTH(ihp->handle)))
return -EINVAL;
addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0);
intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle,
value & ~SENSE_VALID_FLAG);
intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value);
}
return 0;