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Subject[PATCH 2/2] mtd: spi-nor: enable the debugfs for the partname and partid
Date
From: Zhuohao Lee <zhuohao@chromium.org>

This patch adds spi_nor_debugfs_init() for the debugfs initialization.
With this patch, we can read the partname and partid through the
debugfs.

The output of new debugfs nodes on my device are:
cat /sys/kernel/debug/mtd/mtd0/partid
spi-nor:ef6017
cat /sys/kernel/debug/mtd/mtd0/partname
w25q64dw

Signed-off-by: Zhuohao Lee <zhuohao@chromium.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
drivers/mtd/spi-nor/spi-nor.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 79c8f1dd8c6b..6a2fff0598af 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -4767,6 +4767,16 @@ static int spi_nor_set_addr_width(struct spi_nor *nor)
return 0;
}

+static void spi_nor_debugfs_init(struct spi_nor *nor,
+ const struct flash_info *info)
+{
+ struct mtd_info *mtd = &nor->mtd;
+
+ mtd->dbg.partname = info->name;
+ mtd->dbg.partid = devm_kasprintf(nor->dev, GFP_KERNEL, "spi-nor:%*phN",
+ info->id_len, info->id);
+}
+
static const struct flash_info *spi_nor_get_flash_info(struct spi_nor *nor,
const char *name)
{
@@ -4847,6 +4857,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,

nor->info = info;

+ spi_nor_debugfs_init(nor, info);
+
mutex_init(&nor->lock);

/*
--
2.9.5
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