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authorMark Brown <broonie@kernel.org>2021-08-26 15:40:35 +0300
committerMark Brown <broonie@kernel.org>2021-08-26 15:40:35 +0300
commitd287801c497151a44e5577fb3bbab673fe52e7b0 (patch)
tree95aa0c6ea6eb1b3b0894987d140fa0f425430946 /include/linux/regmap.h
parent29c34975c9391d3ad1fd5dd3c92ba0d41afe9549 (diff)
parent67021f25d95292d285dd213c58401642b98eaf24 (diff)
downloadlinux-d287801c497151a44e5577fb3bbab673fe52e7b0.tar.xz
Merge series "Use raw spinlocks in the ls-extirq driver" from Vladimir Oltean <vladimir.oltean@nxp.com>:
The ls-extirq irqchip driver accesses regmap inside its implementation of the struct irq_chip :: irq_set_type method, and currently regmap only knows to lock using normal spinlocks. But the method above wants raw spinlock context, so this isn't going to work and triggers a "[ BUG: Invalid wait context ]" splat. The best we can do given the arrangement of the code is to patch regmap and the syscon driver: regmap to support raw spinlocks, and syscon to request them on behalf of its ls-extirq consumer. Link: https://lore.kernel.org/lkml/20210825135438.ubcuxm5vctt6ne2q@skbuf/T/#u Vladimir Oltean (2): regmap: teach regmap to use raw spinlocks if requested in the config mfd: syscon: request a regmap with raw spinlocks for some devices drivers/base/regmap/internal.h | 4 ++++ drivers/base/regmap/regmap.c | 35 +++++++++++++++++++++++++++++----- drivers/mfd/syscon.c | 16 ++++++++++++++++ include/linux/regmap.h | 2 ++ 4 files changed, 52 insertions(+), 5 deletions(-) -- 2.25.1 base-commit: 6efb943b8616ec53a5e444193dccf1af9ad627b5
Diffstat (limited to 'include/linux/regmap.h')
-rw-r--r--include/linux/regmap.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 77755196277c..e3c9a25a853a 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -344,6 +344,7 @@ typedef void (*regmap_unlock)(void *);
* @ranges: Array of configuration entries for virtual address ranges.
* @num_ranges: Number of range configuration entries.
* @use_hwlock: Indicate if a hardware spinlock should be used.
+ * @use_raw_spinlock: Indicate if a raw spinlock should be used.
* @hwlock_id: Specify the hardware spinlock id.
* @hwlock_mode: The hardware spinlock mode, should be HWLOCK_IRQSTATE,
* HWLOCK_IRQ or 0.
@@ -403,6 +404,7 @@ struct regmap_config {
unsigned int num_ranges;
bool use_hwlock;
+ bool use_raw_spinlock;
unsigned int hwlock_id;
unsigned int hwlock_mode;