From: Petukhov Nikolay <palmtt2@mail.ru>
Date: Fri, 20 Jan 2006 18:41:18 +0000 (-0800)
Subject: [PATCH] ARM: OMAP: omap1510 MPU interrupt BUG
X-Git-Tag: v2.6.16-omap1~122
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=6a4032de91af0a2ce941da539e41b861359ee02d;p=linux-2.6-omap-h63xx.git

[PATCH] ARM: OMAP: omap1510 MPU interrupt BUG

__raw_readl return 32bit, but MPU have 16 bit registers

example:
MPU isr=0x0001, but __raw_readl() return isr=0x00010001 -> virtual interrupt 16
desc_handle_irq(0, d, regs) - handled ok
desc_handle_irq(16, d, regs) - interrupt handler = NULL
---

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index cf5ad2965c2..cb740c32ad3 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -764,6 +764,10 @@ static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
 		u32 isr_saved, level_mask = 0;
 
 		isr_saved = isr = __raw_readl(isr_reg);
+
+		if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO))
+			isr &= 0x0000ffff;
+
 		if (cpu_is_omap24xx())
 			level_mask =
 				__raw_readl(bank->base +