linux-kernel - [PATCH v7 1/3] mtd: core: add nvmem-cells compatible to parse mtd as nvmem cells

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Message-Id: <20210312062830.20548-1-ansuelsmth@gmail.com>
Date:   Fri, 12 Mar 2021 07:28:19 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Rafał Miłecki <zajec5@...il.com>
Cc:     Ansuel Smith <ansuelsmth@...il.com>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v7 1/3] mtd: core: add nvmem-cells compatible to parse mtd as nvmem cells

Partitions that contains the nvmem-cells compatible will register
their direct subonodes as nvmem cells and the node will be treated as a
nvmem provider.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
Tested-by: Rafał Miłecki <rafal@...ecki.pl>
---
 drivers/mtd/mtdcore.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 2d6423d89a17..ac1b4f176a17 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -531,6 +531,7 @@ static int mtd_nvmem_reg_read(void *priv, unsigned int offset,
 
 static int mtd_nvmem_add(struct mtd_info *mtd)
 {
+	struct device_node *node = mtd_get_of_node(mtd);
 	struct nvmem_config config = {};
 
 	config.id = -1;
@@ -543,7 +544,7 @@ static int mtd_nvmem_add(struct mtd_info *mtd)
 	config.stride = 1;
 	config.read_only = true;
 	config.root_only = true;
-	config.no_of_node = true;
+	config.no_of_node = !of_device_is_compatible(node, "nvmem-cells");
 	config.priv = mtd;
 
 	mtd->nvmem = nvmem_register(&config);
-- 
2.30.0