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authorGerlando Falauto <gerlando.falauto@keymile.com>2013-05-06 18:30:19 +0400
committerThomas Gleixner <tglx@linutronix.de>2013-05-29 12:57:10 +0400
commit899f0e66fff36ebb6dd6a83af9aa631f6cb7e0dc (patch)
treeae6f3d0ee7f7c55c103aae9e987427709fe70b33 /include
parentcfeaa93f8a13ae9117ae20933a38a406de80849e (diff)
downloadlinux-899f0e66fff36ebb6dd6a83af9aa631f6cb7e0dc.tar.xz
genirq: Generic chip: Add support for per chip type mask cache
Today the same interrupt mask cache (stored within struct irq_chip_generic) is shared between all the irq_chip_type instances. As there are instances where each irq_chip_type uses a distinct mask register (as it is the case for Orion SoCs), sharing a single mask cache may be incorrect. So add a distinct pointer for each irq_chip_type, which for now points to the original mask register within irq_chip_generic. So no functional changes here. [ tglx: Minor cosmetic tweaks ] Reported-by: Joey Oravec <joravec@drewtech.com> Signed-off-by: Simon Guinot <sguinot@lacie.com> Signed-off-by: Holger Brunck <holger.brunck@keymile.com> Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Cc: Holger Brunck <Holger.Brunck@keymile.com> Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Acked-by: Grant Likely <grant.likely@linaro.org> Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: devicetree-discuss@lists.ozlabs.org Cc: Rob Herring <rob.herring@calxeda.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Gregory Clement <gregory.clement@free-electrons.com> Cc: Simon Guinot <simon@sequanux.org> Cc: linux-arm-kernel@lists.infradead.org Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Jean-Francois Moine <moinejf@free.fr> Cc: Nicolas Pitre <nico@fluxnic.net> Cc: Rob Landley <rob@landley.net> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Link: http://lkml.kernel.org/r/20130506142539.082226607@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/irq.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index bc4e06611958..38709a3ab1c0 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -644,6 +644,8 @@ struct irq_chip_regs {
* @regs: Register offsets for this chip
* @handler: Flow handler associated with this chip
* @type: Chip can handle these flow types
+ * @mask_cache_priv: Cached mask register private to the chip type
+ * @mask_cache: Pointer to cached mask register
*
* A irq_generic_chip can have several instances of irq_chip_type when
* it requires different functions and register offsets for different
@@ -654,6 +656,8 @@ struct irq_chip_type {
struct irq_chip_regs regs;
irq_flow_handler_t handler;
u32 type;
+ u32 mask_cache_priv;
+ u32 *mask_cache;
};
/**
@@ -662,7 +666,7 @@ struct irq_chip_type {
* @reg_base: Register base address (virtual)
* @irq_base: Interrupt base nr for this chip
* @irq_cnt: Number of interrupts handled by this chip
- * @mask_cache: Cached mask register
+ * @mask_cache: Cached mask register shared between all chip types
* @type_cache: Cached type register
* @polarity_cache: Cached polarity register
* @wake_enabled: Interrupt can wakeup from suspend