From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Cernekee Subject: [PATCH V2 05/15] genirq: Generic chip: Add big endian I/O accessors Date: Wed, 29 Oct 2014 19:17:58 -0700 Message-ID: <1414635488-14137-6-git-send-email-cernekee@gmail.com> References: <1414635488-14137-1-git-send-email-cernekee@gmail.com> Return-path: In-Reply-To: <1414635488-14137-1-git-send-email-cernekee@gmail.com> Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-subscribe: List-owner: List-post: List-archive: To: arnd@arndb.de, f.fainelli@gmail.com, tglx@linutronix.de, jason@lakedaemon.net, ralf@linux-mips.org, lethal@linux-sh.org Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, mbizon@freebox.fr, jogo@openwrt.org, linux-mips@linux-mips.org List-Id: devicetree@vger.kernel.org Use io{read,write}32be if the caller specified IRQ_GC_BE_IO when creating the irqchip. Signed-off-by: Kevin Cernekee --- include/linux/irq.h | 1 + kernel/irq/generic-chip.c | 15 +++++++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index 8049e93..e69b7b2 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -739,6 +739,7 @@ enum irq_gc_flags { IRQ_GC_INIT_NESTED_LOCK = 1 << 1, IRQ_GC_MASK_CACHE_PER_TYPE = 1 << 2, IRQ_GC_NO_MASK = 1 << 3, + IRQ_GC_BE_IO = 1 << 4, }; /* diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index b2ee65d..c1890bb 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c @@ -17,16 +17,27 @@ static LIST_HEAD(gc_list); static DEFINE_RAW_SPINLOCK(gc_lock); +static int is_big_endian(struct irq_chip_generic *gc) +{ + return !!(gc->domain->gc->gc_flags & IRQ_GC_BE_IO); +} + static void irq_reg_writel(struct irq_chip_generic *gc, u32 val, int reg_offset) { - writel(val, gc->reg_base + reg_offset); + if (is_big_endian(gc)) + iowrite32be(val, gc->reg_base + reg_offset); + else + writel(val, gc->reg_base + reg_offset); } static u32 irq_reg_readl(struct irq_chip_generic *gc, int reg_offset) { - return readl(gc->reg_base + reg_offset); + if (is_big_endian(gc)) + return ioread32be(gc->reg_base + reg_offset); + else + return readl(gc->reg_base + reg_offset); } /** -- 2.1.1