nand: Embed mtd_info in struct nand_chip
nand_info[] is now an array of pointers, with the actual mtd_info
instance embedded in struct nand_chip.
This is in preparation for syncing the NAND code with Linux 4.6,
which makes the same change to struct nand_chip. It's in a separate
commit due to the large amount of changes required to accommodate the
change to nand_info[].
Signed-off-by: Scott Wood <oss@buserror.net>
diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c
index 46f2654..ddd8249 100644
--- a/drivers/mtd/nand/nand.c
+++ b/drivers/mtd/nand/nand.c
@@ -19,7 +19,7 @@
int nand_curr_device = -1;
-struct mtd_info nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
+struct mtd_info *nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
#ifndef CONFIG_SYS_NAND_SELF_INIT
static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
@@ -30,15 +30,25 @@
static unsigned long total_nand_size; /* in kiB */
-/* Register an initialized NAND mtd device with the U-Boot NAND command. */
-int nand_register(int devnum)
+int nand_mtd_to_devnum(struct mtd_info *mtd)
{
- struct mtd_info *mtd;
+ int i;
+ for (i = 0; i < ARRAY_SIZE(nand_info); i++) {
+ if (mtd && nand_info[i] == mtd)
+ return i;
+ }
+
+ return -ENODEV;
+}
+
+/* Register an initialized NAND mtd device with the U-Boot NAND command. */
+int nand_register(int devnum, struct mtd_info *mtd)
+{
if (devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
return -EINVAL;
- mtd = &nand_info[devnum];
+ nand_info[devnum] = mtd;
sprintf(dev_name[devnum], "nand%d", devnum);
mtd->name = dev_name[devnum];
@@ -62,8 +72,8 @@
#ifndef CONFIG_SYS_NAND_SELF_INIT
static void nand_init_chip(int i)
{
- struct mtd_info *mtd = &nand_info[i];
struct nand_chip *nand = &nand_chip[i];
+ struct mtd_info *mtd = &nand->mtd;
ulong base_addr = base_address[i];
int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
@@ -79,7 +89,7 @@
if (nand_scan(mtd, maxchips))
return;
- nand_register(i);
+ nand_register(i, mtd);
}
#endif
@@ -100,6 +110,7 @@
/*
* Select the chip in the board/cpu specific driver
*/
- board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
+ board_nand_select_device(nand_info[nand_curr_device]->priv,
+ nand_curr_device);
#endif
}