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authorMark Brown <broonie@kernel.org>2023-10-30 16:05:15 +0300
committerMark Brown <broonie@kernel.org>2023-10-30 16:05:15 +0300
commit6bbebcc11a69aef269eb2a33212f76992a4cfb1a (patch)
tree7d6a7feb3f72ffd71377f75b8403eedf4a2d3003 /drivers/base
parent6a2e332c2cbddd17d7dcb8f334953593f1324c8e (diff)
parent0ec7731655de196bc1e4af99e495b38778109d22 (diff)
downloadlinux-6bbebcc11a69aef269eb2a33212f76992a4cfb1a.tar.xz
regmap: Merge up fix for window/paging issue
This was too late and could potentially impact too many drivers for me to be comfortable sending it before the merge window.
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/regcache-rbtree.c3
-rw-r--r--drivers/base/regmap/regcache.c30
-rw-r--r--drivers/base/regmap/regmap.c2
3 files changed, 33 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index db716ffd083e..3db88bbcae0f 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -453,7 +453,8 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
if (!rbnode)
return -ENOMEM;
regcache_rbtree_set_register(map, rbnode,
- reg - rbnode->base_reg, value);
+ (reg - rbnode->base_reg) / map->reg_stride,
+ value);
regcache_rbtree_insert(map, &rbtree_ctx->root, rbnode);
rbtree_ctx->cached_rbnode = rbnode;
}
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index c5d151e9c481..92592f944a3d 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -334,6 +334,11 @@ static int regcache_default_sync(struct regmap *map, unsigned int min,
return 0;
}
+static int rbtree_all(const void *key, const struct rb_node *node)
+{
+ return 0;
+}
+
/**
* regcache_sync - Sync the register cache with the hardware.
*
@@ -351,6 +356,7 @@ int regcache_sync(struct regmap *map)
unsigned int i;
const char *name;
bool bypass;
+ struct rb_node *node;
if (WARN_ON(map->cache_type == REGCACHE_NONE))
return -EINVAL;
@@ -392,6 +398,30 @@ out:
/* Restore the bypass state */
map->cache_bypass = bypass;
map->no_sync_defaults = false;
+
+ /*
+ * If we did any paging with cache bypassed and a cached
+ * paging register then the register and cache state might
+ * have gone out of sync, force writes of all the paging
+ * registers.
+ */
+ rb_for_each(node, 0, &map->range_tree, rbtree_all) {
+ struct regmap_range_node *this =
+ rb_entry(node, struct regmap_range_node, node);
+
+ /* If there's nothing in the cache there's nothing to sync */
+ ret = regcache_read(map, this->selector_reg, &i);
+ if (ret != 0)
+ continue;
+
+ ret = _regmap_write(map, this->selector_reg, i);
+ if (ret != 0) {
+ dev_err(map->dev, "Failed to write %x = %x: %d\n",
+ this->selector_reg, i, ret);
+ break;
+ }
+ }
+
map->unlock(map->lock_arg);
regmap_async_complete(map);
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 884cb51c8f67..234a84ecde8b 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1478,7 +1478,7 @@ static int dev_get_regmap_match(struct device *dev, void *res, void *data)
/* If the user didn't specify a name match any */
if (data)
- return !strcmp((*r)->name, data);
+ return (*r)->name && !strcmp((*r)->name, data);
else
return 1;
}