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regmap: Allow multiple patches to be registered

PATCH New Mark Brown 1 participant 1 message Jul 11, 2013

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Driver core Register map abstraction
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Mark Brown

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PATCH 1/1 regmap: Allow multiple patches to be registered

From: Mark Brown <[email protected]>

It may be useful to register multiple patches with regmap, for example one that depends on the device revision and one that depends on the system configuration. Add support for doing this, appending any new patches to the existing patches.

Signed-off-by Mark Brown <[email protected]>
---
 drivers/base/regmap/regmap.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)
drivers/base/regmap/regmap.c +8 -9
index e0d0c7d..b2aeaba 100644
@@ -1888,13 +1888,10 @@ EXPORT_SYMBOL_GPL(regmap_async_complete);
 int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
 			  int num_regs)
 {
+	struct reg_default *p;
 	int i, ret;
 	bool bypass;
 
-	/* If needed the implementation can be extended to support this */
-	if (map->patch)
-		return -EBUSY;
-
 	map->lock(map->lock_arg);
 
 	bypass = map->cache_bypass;

@@ -1911,11 +1908,13 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
 		}
 	}
 
-	map->patch = kcalloc(num_regs, sizeof(struct reg_default), GFP_KERNEL);
-	if (map->patch != NULL) {
-		memcpy(map->patch, regs,
-		       num_regs * sizeof(struct reg_default));
-		map->patch_regs = num_regs;
+	p = krealloc(map->patch,
+		     sizeof(struct reg_default) * (map->patch_regs + num_regs),
+		     GFP_KERNEL);
+	if (p) {
+		memcpy(p + map->patch_regs, regs, num_regs);
+		map->patch = p;
+		map->patch_regs += num_regs;
 	} else {
 		ret = -ENOMEM;
 	}
Signature · 1 line
1.8.3.2