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7d7aa2fd92
This change makes the names of Broadcom targets consistent by using the common notation based on SoC/CPU ID (which is used internally anyway), bcmXXXX instead of brcmXXXX. This is even used for target TITLE in make menuconfig already, only the short target name used brcm so far. Despite, since subtargets range from bcm2708 to bcm2711, it seems appropriate to use bcm27xx instead of bcm2708 (again, as already done for BOARDNAME). This also renames the packages brcm2708-userland and brcm2708-gpu-fw. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
67 lines
2.1 KiB
Diff
67 lines
2.1 KiB
Diff
From 3166f055a568c4fe127b70b81a878ab59070a6f5 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Thu, 14 Jun 2018 11:21:04 +0100
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Subject: [PATCH] irqchip: irq-bcm2835: Calc. FIQ_START at boot-time
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ad83c7cb2f37 ("irqchip/irq-bcm2836: Add support for DT interrupt polarity")
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changed the way that the BCM2836/7 local interrupts are mapped; instead
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of being pre-mapped they are now mapped on-demand. A side effect of this
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change is that the call to irq_of_parse_and_map from armctrl_of_init
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creates a new mapping, forming a gap between the IRQs and the FIQs. This
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gap breaks the FIQ<->IRQ mapping which up to now has been done by assuming:
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1) that the value of FIQ_START is the same as the number of normal IRQs
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that will be mapped (still true), and
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2) that this value is also the offset between an IRQ and its equivalent
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FIQ (which is no longer the case).
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Remove both assumptions by measuring the interval between the last IRQ
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and the last FIQ, passing it as the parameter to init_FIQ().
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Fixes: https://github.com/raspberrypi/linux/issues/2432
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/irqchip/irq-bcm2835.c | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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--- a/drivers/irqchip/irq-bcm2835.c
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+++ b/drivers/irqchip/irq-bcm2835.c
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@@ -82,8 +82,6 @@
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#define NR_BANKS 3
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#define IRQS_PER_BANK 32
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#define NUMBER_IRQS MAKE_HWIRQ(NR_BANKS, 0)
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-#undef FIQ_START
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-#define FIQ_START (NR_IRQS_BANK0 + MAKE_HWIRQ(NR_BANKS - 1, 0))
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static const int reg_pending[] __initconst = { 0x00, 0x04, 0x08 };
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static const int reg_enable[] __initconst = { 0x18, 0x10, 0x14 };
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@@ -211,7 +209,7 @@ static int __init armctrl_of_init(struct
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bool is_2836)
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{
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void __iomem *base;
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- int irq, b, i;
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+ int irq = 0, last_irq, b, i;
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base = of_iomap(node, 0);
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if (!base)
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@@ -237,6 +235,8 @@ static int __init armctrl_of_init(struct
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}
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}
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+ last_irq = irq;
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+
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if (is_2836) {
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int parent_irq = irq_of_parse_and_map(node, 0);
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@@ -267,7 +267,7 @@ static int __init armctrl_of_init(struct
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}
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}
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#ifndef CONFIG_ARM64
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- init_FIQ(FIQ_START);
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+ init_FIQ(irq - last_irq);
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#endif
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return 0;
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