From 42954857190b9df16d9d873ecc7f6cc38e013e44 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Tue, 9 Jul 2019 20:32:28 +0200 Subject: brcm2708: add linux 4.19 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709) Signed-off-by: Álvaro Fernández Rojas --- ...-Prevent-spurious-interrupts-and-trap-the.patch | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 target/linux/brcm2708/patches-4.19/950-0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch (limited to 'target/linux/brcm2708/patches-4.19/950-0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch') diff --git a/target/linux/brcm2708/patches-4.19/950-0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch b/target/linux/brcm2708/patches-4.19/950-0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch new file mode 100644 index 0000000000..3237b2a811 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch @@ -0,0 +1,27 @@ +From da00086d33452442af1009580f8e40164fc4e97f Mon Sep 17 00:00:00 2001 +From: Phil Elwell +Date: Fri, 4 Dec 2015 17:41:50 +0000 +Subject: [PATCH 006/703] irq-bcm2836: Prevent spurious interrupts, and trap + them early + +The old arch-specific IRQ macros included a dsb to ensure the +write to clear the mailbox interrupt completed before returning +from the interrupt. The BCM2836 irqchip driver needs the same +precaution to avoid spurious interrupts. + +Spurious interrupts are still possible for other reasons, +though, so trap them early. +--- + drivers/irqchip/irq-bcm2836.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/irqchip/irq-bcm2836.c ++++ b/drivers/irqchip/irq-bcm2836.c +@@ -144,6 +144,7 @@ __exception_irq_entry bcm2836_arm_irqchi + u32 ipi = ffs(mbox_val) - 1; + + writel(1 << ipi, mailbox0); ++ dsb(sy); + handle_IPI(ipi, regs); + #endif + } else if (stat) { -- cgit v1.2.3