linux-kernel - Applied "regmap: No multi_write support if bus->write does not exist" to the regmap tree

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Date:	Fri, 21 Aug 2015 09:34:27 -0700
From:	Mark Brown <broonie@...nel.org>
To:	Markus Pargmann <mpa@...gutronix.de>,
	Mark Brown <broonie@...nel.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Applied "regmap: No multi_write support if bus->write does not exist" to the regmap tree

The patch

   regmap: No multi_write support if bus->write does not exist

has been applied to the regmap tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 9c9f7f675970ba1b888272f016157de21f69e7e2 Mon Sep 17 00:00:00 2001
From: Markus Pargmann <mpa@...gutronix.de>
Date: Fri, 21 Aug 2015 10:26:43 +0200
Subject: [PATCH] regmap: No multi_write support if bus->write does not exist

There is no multi_write support available if we cannot use raw_write.
This is the case if bus->write is not implemented.

This patch adds a condition that we need bus and bus->write so that
can_multi_write is true.

Signed-off-by: Markus Pargmann <mpa@...gutronix.de>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/base/regmap/regmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index bc82fd3..27456c7 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -578,7 +578,7 @@ struct regmap *regmap_init(struct device *dev,
 		map->reg_stride = 1;
 	map->use_single_read = config->use_single_rw || !bus || !bus->read;
 	map->use_single_write = config->use_single_rw || !bus || !bus->write;
-	map->can_multi_write = config->can_multi_write;
+	map->can_multi_write = config->can_multi_write && bus && bus->write;
 	map->dev = dev;
 	map->bus = bus;
 	map->bus_context = bus_context;
-- 
2.5.0

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