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Message-Id: <1335822957-5492-1-git-send-email-broonie@opensource.wolfsonmicro.com> Date: Mon, 30 Apr 2012 22:55:57 +0100 From: Mark Brown <broonie@...nsource.wolfsonmicro.com> To: linux-kernel@...r.kernel.org Cc: Mark Brown <broonie@...nsource.wolfsonmicro.com> Subject: [PATCH] regmap: Cache single values read from the chip If we don't have a cached value for a register and we can cache it then when we do a read a value we should add it to the cache to save rereading it later on. Do this for single register reads, for block reads the code would be a little more complex and this covers most practical usage. Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com> --- drivers/base/regmap/regmap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 178989a..b57bb86 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -698,6 +698,9 @@ static int _regmap_read(struct regmap *map, unsigned int reg, trace_regmap_reg_read(map->dev, reg, *val); } + if (!map->cache_bypass) + regcache_write(map, reg, *val); + return ret; } -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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