[PATCH v3 02/22] nvmem: core: Allow specifying device name verbatim

[Andrey Smirnov <andrew.smirnov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Add code to allow avoid having nvmem core append a numeric suffix to
the end of the name by passing config->id of -1.

Cc: Srinivas Kandagatla <srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
Cc: Masahiro Yamada <yamada.masahiro-uWyLwvC0a2jby3iVrkZq2A@public.gmane.org>
Cc: Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org>
Cc: Kevin Hilman <khilman-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
Cc: Matthias Brugger <matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: cphealy-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Signed-off-by: Andrey Smirnov <andrew.smirnov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/nvmem/core.c           | 11 ++++++++---
 include/linux/nvmem-provider.h |  3 +++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 5a5cefd12153..57cbeacfbeb2 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -475,9 +475,14 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	nvmem->reg_write = config->reg_write;
 	np = config->dev->of_node;
 	nvmem->dev.of_node = np;
-	dev_set_name(&nvmem->dev, "%s%d",
-		     config->name ? : "nvmem",
-		     config->name ? config->id : nvmem->id);
+
+	if (config->id == -1 && config->name) {
+		dev_set_name(&nvmem->dev, "%s", config->name);
+	} else {
+		dev_set_name(&nvmem->dev, "%s%d",
+			     config->name ? : "nvmem",
+			     config->name ? config->id : nvmem->id);
+	}
 
 	nvmem->read_only = of_property_read_bool(np, "read-only") |
 			   config->read_only;
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index 27e599222ec1..4889a6c62a81 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -43,6 +43,9 @@ typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset,
  * Note: A default "nvmem<id>" name will be assigned to the device if
  * no name is specified in its configuration. In such case "<id>" is
  * generated with ida_simple_get() and provided id field is ignored.
+ *
+ * Note: Specifying name and setting id to -1 implies a unique device
+ * whose name is provided as-is (kept unaltered).
  */
 struct nvmem_config {
 	struct device		*dev;
-- 
2.14.3