Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git

5 files changed, 85 insertions, 13 deletions

diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 9a9ea514c2d817..583dd5d7d46bf3 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -318,6 +318,7 @@ struct regmap_ram_data {
 	bool *read;
 	bool *written;
 	enum regmap_endian reg_endian;
+	bool (*noinc_reg)(struct regmap_ram_data *data, unsigned int reg);
 };
 
 /*
diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c
index e14cc03a17f6c7..026bdcb45127f5 100644
--- a/drivers/base/regmap/regmap-kunit.c
+++ b/drivers/base/regmap/regmap-kunit.c
@@ -1186,6 +1186,65 @@ static void raw_write(struct kunit *test)
 	regmap_exit(map);
 }
 
+static bool reg_zero(struct device *dev, unsigned int reg)
+{
+	return reg == 0;
+}
+
+static bool ram_reg_zero(struct regmap_ram_data *data, unsigned int reg)
+{
+	return reg == 0;
+}
+
+static void raw_noinc_write(struct kunit *test)
+{
+	struct raw_test_types *t = (struct raw_test_types *)test->param_value;
+	struct regmap *map;
+	struct regmap_config config;
+	struct regmap_ram_data *data;
+	unsigned int val, val_test, val_last;
+	u16 val_array[BLOCK_TEST_SIZE];
+
+	config = raw_regmap_config;
+	config.volatile_reg = reg_zero;
+	config.writeable_noinc_reg = reg_zero;
+	config.readable_noinc_reg = reg_zero;
+
+	map = gen_raw_regmap(&config, t, &data);
+	KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+	if (IS_ERR(map))
+		return;
+
+	data->noinc_reg = ram_reg_zero;
+
+	get_random_bytes(&val_array, sizeof(val_array));
+
+	if (config.val_format_endian == REGMAP_ENDIAN_BIG) {
+		val_test = be16_to_cpu(val_array[1]) + 100;
+		val_last = be16_to_cpu(val_array[BLOCK_TEST_SIZE - 1]);
+	} else {
+		val_test = le16_to_cpu(val_array[1]) + 100;
+		val_last = le16_to_cpu(val_array[BLOCK_TEST_SIZE - 1]);
+	}
+
+	/* Put some data into the register following the noinc register */
+	KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 1, val_test));
+
+	/* Write some data to the noinc register */
+	KUNIT_EXPECT_EQ(test, 0, regmap_noinc_write(map, 0, val_array,
+						    sizeof(val_array)));
+
+	/* We should read back the last value written */
+	KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 0, &val));
+	KUNIT_ASSERT_EQ(test, val_last, val);
+
+	/* Make sure we didn't touch the register after the noinc register */
+	KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 1, &val));
+	KUNIT_ASSERT_EQ(test, val_test, val);
+
+	regmap_exit(map);
+}
+
 static void raw_sync(struct kunit *test)
 {
 	struct raw_test_types *t = (struct raw_test_types *)test->param_value;
@@ -1284,6 +1343,7 @@ static struct kunit_case regmap_test_cases[] = {
 	KUNIT_CASE_PARAM(raw_read_defaults, raw_test_types_gen_params),
 	KUNIT_CASE_PARAM(raw_write_read_single, raw_test_types_gen_params),
 	KUNIT_CASE_PARAM(raw_write, raw_test_types_gen_params),
+	KUNIT_CASE_PARAM(raw_noinc_write, raw_test_types_gen_params),
 	KUNIT_CASE_PARAM(raw_sync, raw_test_cache_types_gen_params),
 	{}
 };
diff --git a/drivers/base/regmap/regmap-ram.c b/drivers/base/regmap/regmap-ram.c
index 85f34a5dee04e2..192d6b131dff8e 100644
--- a/drivers/base/regmap/regmap-ram.c
+++ b/drivers/base/regmap/regmap-ram.c
@@ -65,12 +65,12 @@ struct regmap *__regmap_init_ram(const struct regmap_config *config,
 		return ERR_PTR(-EINVAL);
 	}
 
-	data->read = kcalloc(sizeof(bool), config->max_register + 1,
+	data->read = kcalloc(config->max_register + 1, sizeof(bool),
 			     GFP_KERNEL);
 	if (!data->read)
 		return ERR_PTR(-ENOMEM);
 
-	data->written = kcalloc(sizeof(bool), config->max_register + 1,
+	data->written = kcalloc(config->max_register + 1, sizeof(bool),
 				GFP_KERNEL);
 	if (!data->written)
 		return ERR_PTR(-ENOMEM);
diff --git a/drivers/base/regmap/regmap-raw-ram.c b/drivers/base/regmap/regmap-raw-ram.c
index c9b800885f3ba4..93ae07b503fda1 100644
--- a/drivers/base/regmap/regmap-raw-ram.c
+++ b/drivers/base/regmap/regmap-raw-ram.c
@@ -41,10 +41,15 @@ static int regmap_raw_ram_gather_write(void *context,
 		return -EINVAL;
 
 	r = decode_reg(data->reg_endian, reg);
-	memcpy(&our_buf[r], val, val_len);
-
-	for (i = 0; i < val_len / 2; i++)
-		data->written[r + i] = true;
+	if (data->noinc_reg && data->noinc_reg(data, r)) {
+		memcpy(&our_buf[r], val + val_len - 2, 2);
+		data->written[r] = true;
+	} else {
+		memcpy(&our_buf[r], val, val_len);
+
+		for (i = 0; i < val_len / 2; i++)
+			data->written[r + i] = true;
+	}
 	
 	return 0;
 }
@@ -70,10 +75,16 @@ static int regmap_raw_ram_read(void *context,
 		return -EINVAL;
 
 	r = decode_reg(data->reg_endian, reg);
-	memcpy(val, &our_buf[r], val_len);
-
-	for (i = 0; i < val_len / 2; i++)
-		data->read[r + i] = true;
+	if (data->noinc_reg && data->noinc_reg(data, r)) {
+		for (i = 0; i < val_len; i += 2)
+			memcpy(val + i, &our_buf[r], 2);
+		data->read[r] = true;
+	} else {
+		memcpy(val, &our_buf[r], val_len);
+
+		for (i = 0; i < val_len / 2; i++)
+			data->read[r + i] = true;
+	}
 
 	return 0;
 }
@@ -111,12 +122,12 @@ struct regmap *__regmap_init_raw_ram(const struct regmap_config *config,
 		return ERR_PTR(-EINVAL);
 	}
 
-	data->read = kcalloc(sizeof(bool), config->max_register + 1,
+	data->read = kcalloc(config->max_register + 1, sizeof(bool),
 			     GFP_KERNEL);
 	if (!data->read)
 		return ERR_PTR(-ENOMEM);
 
-	data->written = kcalloc(sizeof(bool), config->max_register + 1,
+	data->written = kcalloc(config->max_register + 1, sizeof(bool),
 				GFP_KERNEL);
 	if (!data->written)
 		return ERR_PTR(-ENOMEM);
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ea615774719941..6db77d8e45f924 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2136,7 +2136,7 @@ static int regmap_noinc_readwrite(struct regmap *map, unsigned int reg,
 }
 
 /**
- * regmap_noinc_write(): Write data from a register without incrementing the
+ * regmap_noinc_write(): Write data to a register without incrementing the
  *			register number
  *
  * @map: Register map to write to