linux-kernel - [PATCH 2/3] regmap: split up regmap_config.use_single

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Date:   Fri, 31 Aug 2018 16:33:32 -0700
From:   David Frey <dpfrey@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     broonie@...nel.org, David Frey <dpfrey@...il.com>
Subject: [PATCH 2/3] regmap: split up regmap_config.use_single_rw

Split regmap_config.use_single_rw into use_single_read and
use_single_write. This change enables drivers of devices which only
support bulk operations in one direction to use the regmap_bulk_*()
functions for both directions and have their bulk operation split into
single operations only when necessary.

Signed-off-by: David Frey <dpfrey@...il.com>
---
 drivers/base/regmap/regmap.c |  4 ++--
 include/linux/regmap.h       | 12 ++++++++----
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 0360a90ad6b6..78a778c08f92 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -762,8 +762,8 @@ struct regmap *__regmap_init(struct device *dev,
 		map->reg_stride_order = ilog2(map->reg_stride);
 	else
 		map->reg_stride_order = -1;
-	map->use_single_read = config->use_single_rw || !bus || !bus->read;
-	map->use_single_write = config->use_single_rw || !bus || !bus->write;
+	map->use_single_read = config->use_single_read || !bus || !bus->read;
+	map->use_single_write = config->use_single_write || !bus || !bus->write;
 	map->can_multi_write = config->can_multi_write && bus && bus->write;
 	if (bus) {
 		map->max_raw_read = bus->max_raw_read;
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 379505a53722..6ea9bf9377cb 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -315,9 +315,12 @@ typedef void (*regmap_unlock)(void *);
  *                   masks are used.
  * @zero_flag_mask: If set, read_flag_mask and write_flag_mask are used even
  *                   if they are both empty.
- * @use_single_rw: If set, converts the bulk read and write operations into
- *		    a series of single read and write operations. This is useful
- *		    for device that does not support bulk read and write.
+ * @use_single_read: If set, converts the bulk read operation into a series of
+ *                   single read operations. This is useful for a device that
+ *                   does not support  bulk read.
+ * @use_single_write: If set, converts the bulk write operation into a series of
+ *                    single write operations. This is useful for a device that
+ *                    does not support bulk write.
  * @can_multi_write: If set, the device supports the multi write mode of bulk
  *                   write operations, if clear multi write requests will be
  *                   split into individual write operations
@@ -380,7 +383,8 @@ struct regmap_config {
 	unsigned long write_flag_mask;
 	bool zero_flag_mask;
 
-	bool use_single_rw;
+	bool use_single_read;
+	bool use_single_write;
 	bool can_multi_write;
 
 	enum regmap_endian reg_format_endian;
-- 
2.11.0