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irqchip/mmp: Do not use of_address_to_resource() to get mux regs 

The "regs" property of the "mrvl,mmp2-mux-intc" devices are silly. They
are offsets from intc's base, not addresses on the parent bus. At this
point it probably can't be fixed.

On an OLPC XO-1.75 machine, the muxes are children of the intc, not the
axi bus, and thus of_address_to_resource() won't work. We should treat
the values as mere integers as opposed to bus addresses.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Link: https://lore.kernel.org/r/20190822092643.593488-7-lkundrak@v3.sk
This commit is contained in:
Lubomir Rintel 2019-08-22 11:26:29 +02:00 committed by Marc Zyngier
parent b2fb4b7799
commit d6a95280ba
1 changed files with 13 additions and 9 deletions
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22
drivers/irqchip/irq-mmp.c
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@ -422,9 +422,9 @@ IRQCHIP_DECLARE(mmp2_intc, "mrvl,mmp2-intc", mmp2_of_init);
static int __init mmp2_mux_of_init(struct device_node *node,
struct device_node *parent)
{
struct resource res;
int i, ret, irq, j = 0;
u32 nr_irqs, mfp_irq;
u32 reg[4];
if (!parent)
return -ENODEV;
@ -436,18 +436,22 @@ static int __init mmp2_mux_of_init(struct device_node *node,
pr_err("Not found mrvl,intc-nr-irqs property\n");
return -EINVAL;
}
ret = of_address_to_resource(node, 0, &res);
/*
* For historical reasons, the "regs" property of the
* mrvl,mmp2-mux-intc is not a regular "regs" property containing
* addresses on the parent bus, but offsets from the intc's base.
* That is why we can't use of_address_to_resource() here.
*/
ret = of_property_read_variable_u32_array(node, "reg", reg,
ARRAY_SIZE(reg),
ARRAY_SIZE(reg));
if (ret < 0) {
pr_err("Not found reg property\n");
return -EINVAL;
}
icu_data[i].reg_status = mmp_icu_base + res.start;
ret = of_address_to_resource(node, 1, &res);
if (ret < 0) {
pr_err("Not found reg property\n");
return -EINVAL;
}
icu_data[i].reg_mask = mmp_icu_base + res.start;
icu_data[i].reg_status = mmp_icu_base + reg[0];
icu_data[i].reg_mask = mmp_icu_base + reg[2];
icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0);
if (!icu_data[i].cascade_irq)
return -EINVAL;