xref: /openbmc/linux/drivers/mtd/devices/Kconfig (revision a6c5f12b)
1# SPDX-License-Identifier: GPL-2.0-only
2menu "Self-contained MTD device drivers"
3	depends on MTD!=n
4	depends on HAS_IOMEM
5
6config MTD_PMC551
7	tristate "Ramix PMC551 PCI Mezzanine RAM card support"
8	depends on PCI
9	help
10	  This provides a MTD device driver for the Ramix PMC551 RAM PCI card
11	  from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>.
12	  These devices come in memory configurations from 32M - 1G.  If you
13	  have one, you probably want to enable this.
14
15	  If this driver is compiled as a module you get the ability to select
16	  the size of the aperture window pointing into the devices memory.
17	  What this means is that if you have a 1G card, normally the kernel
18	  will use a 1G memory map as its view of the device.  As a module,
19	  you can select a 1M window into the memory and the driver will
20	  "slide" the window around the PMC551's memory.  This was
21	  particularly useful on the 2.2 kernels on PPC architectures as there
22	  was limited kernel space to deal with.
23
24config MTD_PMC551_BUGFIX
25	bool "PMC551 256M DRAM Bugfix"
26	depends on MTD_PMC551
27	help
28	  Some of Ramix's PMC551 boards with 256M configurations have invalid
29	  column and row mux values.  This option will fix them, but will
30	  break other memory configurations.  If unsure say N.
31
32config MTD_PMC551_DEBUG
33	bool "PMC551 Debugging"
34	depends on MTD_PMC551
35	help
36	  This option makes the PMC551 more verbose during its operation and
37	  is only really useful if you are developing on this driver or
38	  suspect a possible hardware or driver bug.  If unsure say N.
39
40config MTD_MS02NV
41	tristate "DEC MS02-NV NVRAM module support"
42	depends on MACH_DECSTATION
43	help
44	  This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery
45	  backed-up NVRAM module.  The module was originally meant as an NFS
46	  accelerator.  Say Y here if you have a DECstation 5000/2x0 or a
47	  DECsystem 5900 equipped with such a module.
48
49	  If you want to compile this driver as a module ( = code which can be
50	  inserted in and removed from the running kernel whenever you want),
51	  say M here and read <file:Documentation/kbuild/modules.rst>.
52	  The module will be called ms02-nv.
53
54config MTD_DATAFLASH
55	tristate "Support for AT45xxx DataFlash"
56	depends on SPI_MASTER
57	help
58	  This enables access to AT45xxx DataFlash chips, using SPI.
59	  Sometimes DataFlash chips are packaged inside MMC-format
60	  cards; at this writing, the MMC stack won't handle those.
61
62config MTD_DATAFLASH_WRITE_VERIFY
63	bool "Verify DataFlash page writes"
64	depends on MTD_DATAFLASH
65	help
66	  This adds an extra check when data is written to the flash.
67	  It may help if you are verifying chip setup (timings etc) on
68	  your board.  There is a rare possibility that even though the
69	  device thinks the write was successful, a bit could have been
70	  flipped accidentally due to device wear or something else.
71
72config MTD_DATAFLASH_OTP
73	bool "DataFlash OTP support (Security Register)"
74	depends on MTD_DATAFLASH
75	help
76	  Newer DataFlash chips (revisions C and D) support 128 bytes of
77	  one-time-programmable (OTP) data.  The first half may be written
78	  (once) with up to 64 bytes of data, such as a serial number or
79	  other key product data.  The second half is programmed with a
80	  unique-to-each-chip bit pattern at the factory.
81
82config MTD_MCHP23K256
83	tristate "Microchip 23K256 SRAM"
84	depends on SPI_MASTER
85	help
86	  This enables access to Microchip 23K256 SRAM chips, using SPI.
87
88	  Set up your spi devices with the right board-specific
89	  platform data, or a device tree description if you want to
90	  specify device partitioning
91
92config MTD_MCHP48L640
93	tristate "Microchip 48L640 EERAM"
94	depends on SPI_MASTER
95	help
96	  This enables access to Microchip 48L640 EERAM chips, using SPI.
97
98config MTD_SPEAR_SMI
99	tristate "SPEAR MTD NOR Support through SMI controller"
100	depends on PLAT_SPEAR || COMPILE_TEST
101	default y
102	help
103	  This enable SNOR support on SPEAR platforms using SMI controller
104
105config MTD_SST25L
106	tristate "Support SST25L (non JEDEC) SPI Flash chips"
107	depends on SPI_MASTER
108	help
109	  This enables access to the non JEDEC SST25L SPI flash chips, used
110	  for program and data storage.
111
112	  Set up your spi devices with the right board-specific platform data,
113	  if you want to specify device partitioning.
114
115config MTD_BCM47XXSFLASH
116	tristate "Support for serial flash on BCMA bus"
117	depends on BCMA_SFLASH && (MIPS || ARM)
118	help
119	  BCMA bus can have various flash memories attached, they are
120	  registered by bcma as platform devices. This enables driver for
121	  serial flash memories.
122
123config MTD_SLRAM
124	tristate "Uncached system RAM"
125	help
126	  If your CPU cannot cache all of the physical memory in your machine,
127	  you can still use it for storage or swap by using this driver to
128	  present it to the system as a Memory Technology Device.
129
130config MTD_PHRAM
131	tristate "Physical system RAM"
132	help
133	  This is a re-implementation of the slram driver above.
134
135	  Use this driver to access physical memory that the kernel proper
136	  doesn't have access to, memory beyond the mem=xxx limit, nvram,
137	  memory on the video card, etc...
138
139config MTD_MTDRAM
140	tristate "Test driver using RAM"
141	help
142	  This enables a test MTD device driver which uses vmalloc() to
143	  provide storage.  You probably want to say 'N' unless you're
144	  testing stuff.
145
146config MTDRAM_TOTAL_SIZE
147	int "MTDRAM device size in KiB"
148	depends on MTD_MTDRAM
149	default "4096"
150	help
151	  This allows you to configure the total size of the MTD device
152	  emulated by the MTDRAM driver.  If the MTDRAM driver is built
153	  as a module, it is also possible to specify this as a parameter when
154	  loading the module.
155
156config MTDRAM_ERASE_SIZE
157	int "MTDRAM erase block size in KiB"
158	depends on MTD_MTDRAM
159	default "128"
160	help
161	  This allows you to configure the size of the erase blocks in the
162	  device emulated by the MTDRAM driver.  If the MTDRAM driver is built
163	  as a module, it is also possible to specify this as a parameter when
164	  loading the module.
165
166config MTD_BLOCK2MTD
167	tristate "MTD using block device"
168	depends on BLOCK
169	help
170	  This driver allows a block device to appear as an MTD. It would
171	  generally be used in the following cases:
172
173	  Using Compact Flash as an MTD, these usually present themselves to
174	  the system as an ATA drive.
175	  Testing MTD users (eg JFFS2) on large media and media that might
176	  be removed during a write (using the floppy drive).
177
178config MTD_POWERNV_FLASH
179	tristate "powernv flash MTD driver"
180	depends on PPC_POWERNV
181	help
182	  This provides an MTD device to access flash on powernv OPAL
183	  platforms from Linux. This device abstracts away the
184	  firmware interface for flash access.
185
186comment "Disk-On-Chip Device Drivers"
187
188config MTD_DOCG3
189	tristate "M-Systems Disk-On-Chip G3"
190	select BCH
191	select BCH_CONST_PARAMS if !MTD_NAND_ECC_SW_BCH
192	select BITREVERSE
193	help
194	  This provides an MTD device driver for the M-Systems DiskOnChip
195	  G3 devices.
196
197	  The driver provides access to G3 DiskOnChip, distributed by
198	  M-Systems and now Sandisk. The support is very experimental,
199	  and doesn't give access to any write operations.
200
201config MTD_ST_SPI_FSM
202	tristate "ST Microelectronics SPI FSM Serial Flash Controller"
203	depends on ARCH_STI
204	help
205	  This provides an MTD device driver for the ST Microelectronics
206	  SPI Fast Sequence Mode (FSM) Serial Flash Controller and support
207	  for a subset of connected Serial Flash devices.
208
209if MTD_DOCG3
210config BCH_CONST_M
211	default 14
212config BCH_CONST_T
213	default 4
214endif
215
216endmenu
217