linux-kernel - [PATCH] nvmem: u-boot-env: find Device Tree nodes for NVMEM cells

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Message-Id: <20220915200629.10270-1-zajec5@gmail.com>
Date:   Thu, 15 Sep 2022 22:06:29 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Tom Rini <trini@...sulko.com>, Michael Walle <michael@...le.cc>,
        linux-arm-kernel@...ts.infradead.org, u-boot@...ts.denx.de,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH] nvmem: u-boot-env: find Device Tree nodes for NVMEM cells

From: Rafał Miłecki <rafal@...ecki.pl>

DT binding allows specifying NVMEM cells as NVMEM device (provider)
subnodes. Looks for such subnodes when building NVMEM cells.

This allows NVMEM consumers to use U-Boot environment variables.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 drivers/nvmem/u-boot-env.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvmem/u-boot-env.c b/drivers/nvmem/u-boot-env.c
index 9b9abfb8f187..d17a164ae705 100644
--- a/drivers/nvmem/u-boot-env.c
+++ b/drivers/nvmem/u-boot-env.c
@@ -92,6 +92,7 @@ static int u_boot_env_add_cells(struct u_boot_env *priv, uint8_t *buf,
 			return -ENOMEM;
 		priv->cells[idx].offset = data_offset + value - data;
 		priv->cells[idx].bytes = strlen(value);
+		priv->cells[idx].np = of_get_child_by_name(dev->of_node, priv->cells[idx].name);
 	}
 
 	if (WARN_ON(idx != priv->ncells))
-- 
2.34.1