diff options
| author | Aaron Sierra | 2018-04-30 18:34:49 +0200 |
|---|---|---|
| committer | Boris Brezillon | 2018-05-04 09:50:19 +0200 |
| commit | b1c97e2335f24dbdcc26cfdc882b8b5a0bad25c2 (patch) | |
| tree | c8ed6026cc8627b09e5abd8e78823f5fc4a49b4f /drivers/mtd/chips | |
| parent | mtd: maps: pismo: Remove owner assignment from i2c_driver (diff) | |
| download | kernel-qcow2-linux-b1c97e2335f24dbdcc26cfdc882b8b5a0bad25c2.tar.gz kernel-qcow2-linux-b1c97e2335f24dbdcc26cfdc882b8b5a0bad25c2.tar.xz kernel-qcow2-linux-b1c97e2335f24dbdcc26cfdc882b8b5a0bad25c2.zip | |
mtd: cfi: Support early CFI fixups
Some CFI devices need fixups that affect the number of chips detected,
but the current fixup infrastructure (struct cfi_fixup and cfi_fixup())
does not cover this situation.
Introduce struct cfi_early_fixup and cfi_early_fixup() to fill the void.
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Diffstat (limited to 'drivers/mtd/chips')
| -rw-r--r-- | drivers/mtd/chips/cfi_probe.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c index e8d0164498b0..812df70ab6a6 100644 --- a/drivers/mtd/chips/cfi_probe.c +++ b/drivers/mtd/chips/cfi_probe.c @@ -63,6 +63,30 @@ do { \ #endif +/* + * This fixup occurs immediately after reading the CFI structure and can affect + * the number of chips detected, unlike cfi_fixup, which occurs after an + * mtd_info structure has been created for the chip. + */ +struct cfi_early_fixup { + uint16_t mfr; + uint16_t id; + void (*fixup)(struct cfi_private *cfi); +}; + +static void cfi_early_fixup(struct cfi_private *cfi, + const struct cfi_early_fixup *fixups) +{ + const struct cfi_early_fixup *f; + + for (f = fixups; f->fixup; f++) { + if (((f->mfr == CFI_MFR_ANY) || (f->mfr == cfi->mfr)) && + ((f->id == CFI_ID_ANY) || (f->id == cfi->id))) { + f->fixup(cfi); + } + } +} + /* check for QRY. in: interleave,type,mode ret: table index, <0 for error @@ -151,6 +175,10 @@ static int __xipram cfi_probe_chip(struct map_info *map, __u32 base, return 1; } +static const struct cfi_early_fixup cfi_early_fixup_table[] = { + { }, +}; + static int __xipram cfi_chip_setup(struct map_info *map, struct cfi_private *cfi) { @@ -235,6 +263,8 @@ static int __xipram cfi_chip_setup(struct map_info *map, cfi_qry_mode_off(base, map, cfi); xip_allowed(base, map); + cfi_early_fixup(cfi, cfi_early_fixup_table); + printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank. Manufacturer ID %#08x Chip ID %#08x\n", map->name, cfi->interleave, cfi->device_type*8, base, map->bankwidth*8, cfi->mfr, cfi->id); |