The information which kind of bbt (if any) is used is hidden somewhere
in the NAND layer. Expose it to a device parameter to make it detectable
and visible during runtime.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/mtd/nand/nand_base.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index ac223ca..7675695 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1688,6 +1688,23 @@ static int mtd_set_erasebad(struct device_d *dev, struct param_d *param,
return 0;
}
+static const char *mtd_get_bbt_type(struct device_d *dev, struct param_d *p)
+{
+ struct mtd_info *mtd = container_of(dev, struct mtd_info, class_dev);
+ struct nand_chip *chip = mtd->priv;
+ char *str;
+
+ if (!chip->bbt)
+ str = "none";
+ else if ((chip->bbt_td && chip->bbt_td->pages[0] != -1) ||
+ (chip->bbt_md && chip->bbt_md->pages[0] != -1))
+ str = "flashbased";
+ else
+ str = "memorybased";
+
+ return str;
+}
+
int add_mtd_nand_device(struct mtd_info *mtd, char *devname)
{
int ret;
@@ -1700,6 +1717,8 @@ int add_mtd_nand_device(struct mtd_info *mtd, char *devname)
dev_add_param(&mtd->class_dev, "erasebad", mtd_set_erasebad,
NULL, 0);
+ dev_add_param(&mtd->class_dev, "bbt", NULL, mtd_get_bbt_type, 0);
+
return ret;
}
--
1.7.10.4
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