diff options
| author | Han Xu <han.xu@nxp.com> | 2026-07-29 14:22:20 -0500 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2026-08-07 15:59:37 +0200 |
| commit | 113f62225e98febabba0fee00afd29d4eaf65abb (patch) | |
| tree | 9bc5871c8fed91b0d5f96bfadc4a4ec51653024b | |
| parent | e5e415262330bd70f983e091d8919d9dcd99e475 (diff) | |
mtd: rawnand: gpmi: add debugfs entry for BCH geometry
Export the BCH geometry parameters via debugfs to aid debugging and
provide the necessary information for legacy kobs-ng tool. The debugfs
directory "gpmi-nand" is created under the root debugfs tree, exposing:
bch_geometry - blob containing the struct bch_geometry fields
raw_mode - flag indicating raw mode status
The implementation is guarded with #ifdef CONFIG_DEBUG_FS to avoid
build failures when debugfs is disabled.
Signed-off-by: Han Xu <han.xu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
| -rw-r--r-- | drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 29 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h | 6 |
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c index c1f766cb225a..527165ccc839 100644 --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c @@ -7,6 +7,7 @@ */ #include <linux/cleanup.h> #include <linux/clk.h> +#include <linux/debugfs.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/sched/task_stack.h> @@ -732,6 +733,31 @@ static int common_nfc_set_geometry(struct gpmi_nand_data *this) return err; } +#ifdef CONFIG_DEBUG_FS +static void bch_remove_debugfs(void *data) +{ + struct gpmi_nand_data *this = data; + + debugfs_remove_recursive(this->dbg_root); + this->dbg_root = NULL; +} + +static void bch_create_debugfs(struct gpmi_nand_data *this) +{ + struct bch_geometry *bch_geo = &this->bch_geometry; + + this->dbg_root = debugfs_create_dir("gpmi-nand", NULL); + this->dbg_bch_geo.data = (void *)bch_geo; + this->dbg_bch_geo.size = sizeof(struct bch_geometry); + this->raw_mode = true; + debugfs_create_blob("bch_geometry", 0444, this->dbg_root, &this->dbg_bch_geo); + debugfs_create_bool("raw_mode", 0444, this->dbg_root, &this->raw_mode); + devm_add_action_or_reset(this->dev, bch_remove_debugfs, this); +} +#else +static void bch_create_debugfs(struct gpmi_nand_data *this) {} +#endif /* CONFIG_DEBUG_FS */ + /* Configures the geometry for BCH. */ static int bch_set_geometry(struct gpmi_nand_data *this) { @@ -2282,6 +2308,9 @@ static int gpmi_init_last(struct gpmi_nand_data *this) if (ret) return ret; + /* save BCH geometry to debugfs if CONFIG_DEBUG_FS is enabled */ + bch_create_debugfs(this); + /* Init the nand_ecc_ctrl{} */ ecc->read_page = gpmi_ecc_read_page; ecc->write_page = gpmi_ecc_write_page; diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h index 3e9bc985e44a..80c32efbaef8 100644 --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h @@ -161,6 +161,12 @@ struct gpmi_nand_data { #define DMA_CHANS 8 struct dma_chan *dma_chans[DMA_CHANS]; struct completion dma_done; + +#ifdef CONFIG_DEBUG_FS + struct dentry *dbg_root; + struct debugfs_blob_wrapper dbg_bch_geo; + bool raw_mode; +#endif }; /* BCH : Status Block Completion Codes */ |