diff options
| author | Lubomir Rintel <lkundrak@v3.sk> | 2019-08-22 12:26:29 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2019-08-30 17:23:30 +0300 |
| commit | d6a95280ba169c3a3d632d983cc6977c544a06e8 (patch) | |
| tree | abc6d34a7177d902b48e1a375846a6e09a49f063 | |
| parent | b2fb4b77994abc1107c35547f3e123dce8e9f67d (diff) | |
| download | linux-d6a95280ba169c3a3d632d983cc6977c544a06e8.tar.xz | |
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
| -rw-r--r-- | drivers/irqchip/irq-mmp.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/irqchip/irq-mmp.c b/drivers/irqchip/irq-mmp.c index 0671c3bbfc34..f60e52bd14c6 100644 --- a/drivers/irqchip/irq-mmp.c +++ b/drivers/irqchip/irq-mmp.c @@ -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); - 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); + + /* + * 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_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; |