This is a note to let you know that I've just added the patch titled
mfd: tps65218: Make INT[12] and STATUS registers volatile
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mfd-tps65218-make-int-and-status-registers-volatile.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 773328da243978bebac82bf4c45604281edb6975 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@xxxxxx>
Date: Fri, 26 Dec 2014 13:28:20 -0600
Subject: mfd: tps65218: Make INT[12] and STATUS registers volatile
From: Felipe Balbi <balbi@xxxxxx>
commit 773328da243978bebac82bf4c45604281edb6975 upstream.
STATUS register can be modified by the HW, so we
should bypass cache because of that.
In the case of INT[12] registers, they are the ones
that actually clear the IRQ source at the time they
are read. If we rely on the cache for them, we will
never be able to clear the interrupt, which will cause
our IRQ line to be disabled due to IRQ throttling.
Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mfd/tps65218.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/mfd/tps65218.c
+++ b/drivers/mfd/tps65218.c
@@ -125,10 +125,21 @@ int tps65218_clear_bits(struct tps65218
}
EXPORT_SYMBOL_GPL(tps65218_clear_bits);
+static const struct regmap_range tps65218_yes_ranges[] = {
+ regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
+ regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
+};
+
+static const struct regmap_access_table tps65218_volatile_table = {
+ .yes_ranges = tps65218_yes_ranges,
+ .n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
+};
+
static struct regmap_config tps65218_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,
+ .volatile_table = &tps65218_volatile_table,
};
static const struct regmap_irq tps65218_irqs[] = {
Patches currently in stable-queue which might be from balbi@xxxxxx are
queue-3.18/mfd-tps65218-make-int1-our-status_base-register.patch
queue-3.18/mfd-tps65218-make-int-and-status-registers-volatile.patch
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