blob: e65948a9aa0e34fc1ad58b596477a8f28e5d6465 [file] [log] [blame]
Tony Lindgrena0694862013-01-11 11:24:20 -08001config ARCH_OMAP
2 bool
3
Arnd Bergmann59d92872013-05-01 00:02:26 +02004config ARCH_OMAP2
5 bool "TI OMAP2"
6 depends on ARCH_MULTI_V6
7 select ARCH_OMAP2PLUS
8 select CPU_V6
9 select MULTI_IRQ_HANDLER
10 select SOC_HAS_OMAP2_SDRC
Arnd Bergmann59d92872013-05-01 00:02:26 +020011
12config ARCH_OMAP3
13 bool "TI OMAP3"
14 depends on ARCH_MULTI_V7
15 select ARCH_OMAP2PLUS
16 select ARCH_HAS_OPP
17 select ARM_CPU_SUSPEND if PM
18 select CPU_V7
19 select MULTI_IRQ_HANDLER
20 select OMAP_INTERCONNECT
21 select PM_OPP if PM
22 select PM_RUNTIME if CPU_IDLE
23 select SOC_HAS_OMAP2_SDRC
Arnd Bergmann59d92872013-05-01 00:02:26 +020024 select USB_ARCH_HAS_EHCI if USB_SUPPORT
25
26config ARCH_OMAP4
27 bool "TI OMAP4"
28 depends on ARCH_MULTI_V7
29 select ARCH_OMAP2PLUS
30 select ARCH_HAS_OPP
31 select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
32 select ARM_CPU_SUSPEND if PM
33 select ARM_ERRATA_720789
34 select ARM_GIC
35 select CACHE_L2X0
36 select CPU_V7
37 select HAVE_ARM_SCU if SMP
Olof Johansson47dcd352013-07-23 14:51:34 -070038 select HAVE_ARM_TWD if SMP
Arnd Bergmann59d92872013-05-01 00:02:26 +020039 select HAVE_SMP
Arnd Bergmann59d92872013-05-01 00:02:26 +020040 select OMAP_INTERCONNECT
41 select PL310_ERRATA_588369
42 select PL310_ERRATA_727915
43 select PM_OPP if PM
44 select PM_RUNTIME if CPU_IDLE
45 select USB_ARCH_HAS_EHCI if USB_SUPPORT
Arnd Bergmann59d92872013-05-01 00:02:26 +020046 select ARM_ERRATA_754322
47 select ARM_ERRATA_775420
48
49config SOC_OMAP5
50 bool "TI OMAP5"
51 depends on ARCH_MULTI_V7
52 select ARCH_OMAP2PLUS
53 select ARM_CPU_SUSPEND if PM
54 select ARM_GIC
55 select CPU_V7
56 select HAVE_ARM_SCU if SMP
57 select HAVE_ARM_TWD if LOCAL_TIMERS
58 select HAVE_SMP
Arnd Bergmann59d92872013-05-01 00:02:26 +020059 select HAVE_ARM_ARCH_TIMER
Olof Johanssonf82a3132013-07-24 16:55:23 -070060 select ARM_ERRATA_798181 if SMP
Arnd Bergmann59d92872013-05-01 00:02:26 +020061
62config SOC_AM33XX
Ezequiel Garcia10851892013-08-08 18:32:08 -030063 bool "TI AM33XX"
Arnd Bergmann59d92872013-05-01 00:02:26 +020064 depends on ARCH_MULTI_V7
65 select ARCH_OMAP2PLUS
66 select ARM_CPU_SUSPEND if PM
67 select CPU_V7
68 select MULTI_IRQ_HANDLER
Arnd Bergmann59d92872013-05-01 00:02:26 +020069
70config SOC_AM43XX
71 bool "TI AM43x"
72 depends on ARCH_MULTI_V7
73 select CPU_V7
74 select ARCH_OMAP2PLUS
75 select MULTI_IRQ_HANDLER
76 select ARM_GIC
Arnd Bergmann59d92872013-05-01 00:02:26 +020077 select MACH_OMAP_GENERIC
78
Tero Kristo68b9f602014-01-10 11:25:28 +020079config SOC_DRA7XX
80 bool "TI DRA7XX"
81 depends on ARCH_MULTI_V7
82 select ARCH_OMAP2PLUS
83 select ARM_CPU_SUSPEND if PM
84 select ARM_GIC
85 select CPU_V7
86 select HAVE_SMP
87 select HAVE_ARM_ARCH_TIMER
88
Tony Lindgrena0694862013-01-11 11:24:20 -080089config ARCH_OMAP2PLUS
Arnd Bergmann59d92872013-05-01 00:02:26 +020090 bool
91 select ARCH_HAS_BANDGAP
Tony Lindgrena0694862013-01-11 11:24:20 -080092 select ARCH_HAS_CPUFREQ
93 select ARCH_HAS_HOLES_MEMORYMODEL
94 select ARCH_OMAP
95 select ARCH_REQUIRE_GPIOLIB
Tony Lindgrena0694862013-01-11 11:24:20 -080096 select CLKSRC_MMIO
Uwe Kleine-König07d8a492013-10-01 11:08:56 +020097 select COMMON_CLK
Tony Lindgrena0694862013-01-11 11:24:20 -080098 select GENERIC_CLOCKEVENTS
99 select GENERIC_IRQ_CHIP
Tony Lindgrenf2acae62013-09-25 15:44:39 -0700100 select MACH_OMAP_GENERIC
Tony Lindgrena0694862013-01-11 11:24:20 -0800101 select OMAP_DM_TIMER
102 select PINCTRL
103 select PROC_DEVICETREE if PROC_FS
Ruslan Bilovol6770b212013-02-14 13:55:24 +0200104 select SOC_BUS
Tony Lindgrena0694862013-01-11 11:24:20 -0800105 select SPARSE_IRQ
Olof Johansson9d8812d2013-07-09 01:31:23 -0700106 select TI_PRIV_EDMA
Tony Lindgrena0694862013-01-11 11:24:20 -0800107 select USE_OF
108 help
109 Systems based on OMAP2, OMAP3, OMAP4 or OMAP5
110
111
Tony Lindgren4a54db62010-07-05 16:31:47 +0300112if ARCH_OMAP2PLUS
113
114menu "TI OMAP2/3/4 Specific Features"
115
Tony Lindgren8d9166b2010-07-05 16:31:48 +0300116config ARCH_OMAP2PLUS_TYPICAL
117 bool "Typical OMAP configuration"
118 default y
119 select AEABI
Russell Kingb1b3f492012-10-06 17:12:25 +0100120 select HIGHMEM
Tony Lindgren8d9166b2010-07-05 16:31:48 +0300121 select I2C
122 select I2C_OMAP
Tony Lindgren8d9166b2010-07-05 16:31:48 +0300123 select MENELAUS if ARCH_OMAP2
R Sricharan8dd21c92013-02-07 16:21:46 +0530124 select NEON if CPU_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100125 select PM_RUNTIME
126 select REGULATOR
Tony Lindgren8d9166b2010-07-05 16:31:48 +0300127 select TWL4030_CORE if ARCH_OMAP3 || ARCH_OMAP4
128 select TWL4030_POWER if ARCH_OMAP3 || ARCH_OMAP4
Russell Kingb1b3f492012-10-06 17:12:25 +0100129 select VFP
Tony Lindgren8d9166b2010-07-05 16:31:48 +0300130 help
131 Compile a kernel suitable for booting most boards
132
Vaibhav Hiremathecc46cf2012-07-05 08:05:15 -0700133config SOC_HAS_OMAP2_SDRC
134 bool "OMAP2 SDRAM Controller support"
135
Santosh Shilimkarfa6d79d2012-08-13 14:24:24 +0530136config SOC_HAS_REALTIME_COUNTER
137 bool "Real time free running counter"
R Sricharanf18153f2013-02-07 13:25:39 +0530138 depends on SOC_OMAP5 || SOC_DRA7XX
Jon Hunter34cceb72012-11-27 11:22:39 -0600139 default y
Santosh Shilimkarfa6d79d2012-08-13 14:24:24 +0530140
Tony Lindgren1dbae812005-11-10 14:26:51 +0000141comment "OMAP Core Type"
Tony Lindgrenf558b272012-03-05 16:02:18 -0800142 depends on ARCH_OMAP2
Tony Lindgren1dbae812005-11-10 14:26:51 +0000143
Tony Lindgren59b479e2011-01-27 16:39:40 -0800144config SOC_OMAP2420
Tony Lindgren1dbae812005-11-10 14:26:51 +0000145 bool "OMAP2420 support"
Tony Lindgrenf558b272012-03-05 16:02:18 -0800146 depends on ARCH_OMAP2
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300147 default y
Timo Teras77900a22006-06-26 16:16:12 -0700148 select OMAP_DM_TIMER
Vaibhav Hiremathecc46cf2012-07-05 08:05:15 -0700149 select SOC_HAS_OMAP2_SDRC
Tony Lindgren1dbae812005-11-10 14:26:51 +0000150
Tony Lindgren59b479e2011-01-27 16:39:40 -0800151config SOC_OMAP2430
Syed Mohammed Khasim72d0f1c2006-12-06 17:14:05 -0800152 bool "OMAP2430 support"
Tony Lindgrenf558b272012-03-05 16:02:18 -0800153 depends on ARCH_OMAP2
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300154 default y
Vaibhav Hiremathecc46cf2012-07-05 08:05:15 -0700155 select SOC_HAS_OMAP2_SDRC
Syed Mohammed Khasim72d0f1c2006-12-06 17:14:05 -0800156
Tony Lindgren59b479e2011-01-27 16:39:40 -0800157config SOC_OMAP3430
Syed Mohammed, Khasimcc26b3b2008-10-09 17:51:41 +0300158 bool "OMAP3430 support"
Tony Lindgrenf558b272012-03-05 16:02:18 -0800159 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300160 default y
Vaibhav Hiremathecc46cf2012-07-05 08:05:15 -0700161 select SOC_HAS_OMAP2_SDRC
Syed Mohammed, Khasimcc26b3b2008-10-09 17:51:41 +0300162
Kevin Hilman33959552012-05-10 11:10:07 -0700163config SOC_TI81XX
Hemant Pedanekara9203602011-12-13 10:46:44 -0800164 bool "TI81XX support"
Tony Lindgrenf558b272012-03-05 16:02:18 -0800165 depends on ARCH_OMAP3
Hemant Pedanekar4bd7be22011-02-16 08:31:39 -0800166 default y
167
Tony Lindgrenfc440462010-07-05 16:31:36 +0300168config OMAP_PACKAGE_ZAF
169 bool
170
171config OMAP_PACKAGE_ZAC
172 bool
173
Tony Lindgrenddaa9122009-12-11 16:16:32 -0800174config OMAP_PACKAGE_CBC
175 bool
176
177config OMAP_PACKAGE_CBB
178 bool
179
180config OMAP_PACKAGE_CUS
181 bool
182
Tony Lindgren662c8b52009-12-11 16:16:33 -0800183config OMAP_PACKAGE_CBP
184 bool
185
Tony Lindgrenf2acae62013-09-25 15:44:39 -0700186comment "OMAP Legacy Platform Data Board Type"
Tony Lindgrenf558b272012-03-05 16:02:18 -0800187 depends on ARCH_OMAP2PLUS
Tony Lindgren1dbae812005-11-10 14:26:51 +0000188
189config MACH_OMAP_GENERIC
Tony Lindgrenf2acae62013-09-25 15:44:39 -0700190 bool
Tony Lindgren1dbae812005-11-10 14:26:51 +0000191
Kalle Valo1b52d5d2009-08-28 10:51:37 -0700192config MACH_OMAP2_TUSB6010
193 bool
Tony Lindgren59b479e2011-01-27 16:39:40 -0800194 depends on ARCH_OMAP2 && SOC_OMAP2420
Kalle Valo1b52d5d2009-08-28 10:51:37 -0700195 default y if MACH_NOKIA_N8X0
196
Tony Lindgren1dbae812005-11-10 14:26:51 +0000197config MACH_OMAP_H4
198 bool "OMAP 2420 H4 board"
Tony Lindgren59b479e2011-01-27 16:39:40 -0800199 depends on SOC_OMAP2420
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300200 default y
David Brownellf6049312006-12-06 17:14:03 -0800201 select OMAP_DEBUG_DEVICES
Russell Kingb1b3f492012-10-06 17:12:25 +0100202 select OMAP_PACKAGE_ZAF
Tony Lindgren1dbae812005-11-10 14:26:51 +0000203
Syed Mohammed Khasim72d0f1c2006-12-06 17:14:05 -0800204config MACH_OMAP_2430SDP
205 bool "OMAP 2430 SDP board"
Tony Lindgren59b479e2011-01-27 16:39:40 -0800206 depends on SOC_OMAP2430
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300207 default y
Tony Lindgren369ed782010-07-05 16:31:38 +0300208 select OMAP_PACKAGE_ZAC
Syed Mohammed Khasim72d0f1c2006-12-06 17:14:05 -0800209
Syed Mohammed, Khasim2885f002008-10-09 17:51:42 +0300210config MACH_OMAP3_BEAGLE
211 bool "OMAP3 BEAGLE board"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800212 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300213 default y
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800214 select OMAP_PACKAGE_CBB
Syed Mohammed, Khasim2885f002008-10-09 17:51:42 +0300215
Thomas Weber476544c2010-02-17 14:09:28 -0800216config MACH_DEVKIT8000
Thomas Weber51824c52010-03-24 12:52:11 +0000217 bool "DEVKIT8000 board"
218 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300219 default y
Thomas Weber51824c52010-03-24 12:52:11 +0000220 select OMAP_PACKAGE_CUS
Thomas Weber476544c2010-02-17 14:09:28 -0800221
Nishant Kamat49265652008-10-10 11:28:23 +0300222config MACH_OMAP_LDP
223 bool "OMAP3 LDP board"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800224 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300225 default y
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800226 select OMAP_PACKAGE_CBB
Nishant Kamat49265652008-10-10 11:28:23 +0300227
Tim Nordelld40f3f12010-09-27 16:05:47 +0000228config MACH_OMAP3530_LV_SOM
229 bool "OMAP3 Logic 3530 LV SOM board"
230 depends on ARCH_OMAP3
Tim Nordelld40f3f12010-09-27 16:05:47 +0000231 default y
Russell Kingb1b3f492012-10-06 17:12:25 +0100232 select OMAP_PACKAGE_CBB
Tim Nordelld40f3f12010-09-27 16:05:47 +0000233 help
234 Support for the LogicPD OMAP3530 SOM Development kit
235 for full description please see the products webpage at
236 http://www.logicpd.com/products/development-kits/texas-instruments-zoom%E2%84%A2-omap35x-development-kit
237
238config MACH_OMAP3_TORPEDO
239 bool "OMAP3 Logic 35x Torpedo board"
240 depends on ARCH_OMAP3
Tim Nordelld40f3f12010-09-27 16:05:47 +0000241 default y
Russell Kingb1b3f492012-10-06 17:12:25 +0100242 select OMAP_PACKAGE_CBB
Tim Nordelld40f3f12010-09-27 16:05:47 +0000243 help
244 Support for the LogicPD OMAP35x Torpedo Development kit
245 for full description please see the products webpage at
246 http://www.logicpd.com/products/development-kits/zoom-omap35x-torpedo-development-kit
247
Steve Sakomaneba26452008-10-09 17:51:43 +0300248config MACH_OVERO
249 bool "Gumstix Overo board"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800250 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300251 default y
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800252 select OMAP_PACKAGE_CBB
Grazvydas Ignotasda177242008-12-10 17:36:54 -0800253
Ranjith Lohithakshanc6253272009-11-18 18:41:09 -0800254config MACH_OMAP3517EVM
255 bool "OMAP3517/ AM3517 EVM board"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800256 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300257 default y
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800258 select OMAP_PACKAGE_CBB
Ranjith Lohithakshanc6253272009-11-18 18:41:09 -0800259
Srinath1cb125c2010-11-16 14:26:58 -0800260config MACH_CRANEBOARD
261 bool "AM3517/05 CRANE board"
262 depends on ARCH_OMAP3
263 select OMAP_PACKAGE_CBB
264
Grazvydas Ignotasda177242008-12-10 17:36:54 -0800265config MACH_OMAP3_PANDORA
266 bool "OMAP3 Pandora"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800267 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300268 default y
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800269 select OMAP_PACKAGE_CBB
Felipe Contrerasa075ccc2012-01-20 05:38:31 -0800270 select REGULATOR_FIXED_VOLTAGE if REGULATOR
Syed Mohammed Khasim6fdc29e2009-03-23 18:38:16 -0700271
Radek Pilara17fb8f2012-08-17 18:03:43 +0200272config MACH_TOUCHBOOK
Gregoire Gentil7a079ca2009-12-11 16:16:34 -0800273 bool "OMAP3 Touch Book"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800274 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300275 default y
Radek Pilara17fb8f2012-08-17 18:03:43 +0200276 select OMAP_PACKAGE_CBB
Gregoire Gentil7a079ca2009-12-11 16:16:34 -0800277
Syed Mohammed Khasim6fdc29e2009-03-23 18:38:16 -0700278config MACH_OMAP_3430SDP
279 bool "OMAP 3430 SDP board"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800280 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300281 default y
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800282 select OMAP_PACKAGE_CBB
Lauri Leukkunenffe7f952009-03-23 18:38:17 -0700283
Tony Lindgrend2fbf342009-10-22 14:48:13 -0700284config MACH_NOKIA_N800
285 bool
286
287config MACH_NOKIA_N810
288 bool
289
290config MACH_NOKIA_N810_WIMAX
291 bool
292
Kalle Valo63138812009-08-28 10:51:38 -0700293config MACH_NOKIA_N8X0
294 bool "Nokia N800/N810"
Tony Lindgren59b479e2011-01-27 16:39:40 -0800295 depends on SOC_OMAP2420
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300296 default y
Tony Lindgrend2fbf342009-10-22 14:48:13 -0700297 select MACH_NOKIA_N800
298 select MACH_NOKIA_N810
299 select MACH_NOKIA_N810_WIMAX
Russell Kingb1b3f492012-10-06 17:12:25 +0100300 select OMAP_PACKAGE_ZAC
Kalle Valo63138812009-08-28 10:51:38 -0700301
Lauri Leukkunenffe7f952009-03-23 18:38:17 -0700302config MACH_NOKIA_RX51
Pavel Machekcc067792012-10-17 23:03:00 +0200303 bool "Nokia N900 (RX-51) phone"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800304 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300305 default y
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800306 select OMAP_PACKAGE_CBB
Vikram Pandita577145f2009-05-28 14:04:04 -0700307
Mike Rapoport2886d122009-11-18 18:41:07 -0800308config MACH_CM_T35
Igor Grinbergc3146972011-07-05 03:38:23 -0700309 bool "CompuLab CM-T35/CM-T3730 modules"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800310 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300311 default y
Igor Grinbergc3146972011-07-05 03:38:23 -0700312 select MACH_CM_T3730
Tony Lindgrenca5742b2009-12-11 16:16:32 -0800313 select OMAP_PACKAGE_CUS
Mike Rapoport2886d122009-11-18 18:41:07 -0800314
Igor Grinbergd04b6202010-09-21 16:03:09 +0000315config MACH_CM_T3517
316 bool "CompuLab CM-T3517 module"
317 depends on ARCH_OMAP3
318 default y
319 select OMAP_PACKAGE_CBB
Igor Grinbergd04b6202010-09-21 16:03:09 +0000320
Igor Grinbergc3146972011-07-05 03:38:23 -0700321config MACH_CM_T3730
322 bool
323
Jason9cbc3492010-05-17 14:39:09 +0800324config MACH_SBC3530
325 bool "OMAP3 SBC STALKER board"
326 depends on ARCH_OMAP3
Tony Lindgrenffb63e32010-07-05 16:31:47 +0300327 default y
Jason9cbc3492010-05-17 14:39:09 +0800328 select OMAP_PACKAGE_CUS
Jason9cbc3492010-05-17 14:39:09 +0800329
Hemant Pedanekar2c87fb22011-02-15 23:06:08 +0530330config MACH_TI8168EVM
331 bool "TI8168 Evaluation Module"
Kevin Hilman33959552012-05-10 11:10:07 -0700332 depends on SOC_TI81XX
Hemant Pedanekar2c87fb22011-02-15 23:06:08 +0530333 default y
334
Hemant Pedanekara890b672011-12-13 10:48:55 -0800335config MACH_TI8148EVM
336 bool "TI8148 Evaluation Module"
Kevin Hilman33959552012-05-10 11:10:07 -0700337 depends on SOC_TI81XX
Hemant Pedanekara890b672011-12-13 10:48:55 -0800338 default y
339
Alexander Shishkin183bd502009-12-01 14:03:31 +0100340config OMAP3_EMU
341 bool "OMAP3 debugging peripherals"
342 depends on ARCH_OMAP3
Ming Leia8a65652011-11-23 14:44:50 -0800343 select ARM_AMBA
Alexander Shishkin183bd502009-12-01 14:03:31 +0100344 select OC_ETM
345 help
346 Say Y here to enable debugging hardware of omap3
347
Paul Walmsley18862cb2009-12-08 16:33:14 -0700348config OMAP3_SDRC_AC_TIMING
349 bool "Enable SDRC AC timing register changes"
Tony Lindgrena8eb7ca2010-02-12 12:26:48 -0800350 depends on ARCH_OMAP3
Paul Walmsley18862cb2009-12-08 16:33:14 -0700351 default n
352 help
353 If you know that none of your system initiators will attempt to
354 access SDRAM during CORE DVFS, select Y here. This should boost
355 SDRAM performance at lower CORE OPPs. There are relatively few
356 users who will wish to say yes at this point - almost everyone will
357 wish to say no. Selecting yes without understanding what is
358 going on could result in system crashes;
359
Santosh Shilimkar137d1052011-06-25 18:04:31 -0700360config OMAP4_ERRATA_I688
Santosh Shilimkar2ec1fc42012-02-02 19:33:55 +0530361 bool "OMAP4 errata: Async Bridge Corruption"
Santosh Shilimkar1348bbf2013-02-15 18:05:49 +0530362 depends on (ARCH_OMAP4 || SOC_OMAP5) && !ARCH_MULTIPLATFORM
Santosh Shilimkar137d1052011-06-25 18:04:31 -0700363 select ARCH_HAS_BARRIERS
364 help
365 If a data is stalled inside asynchronous bridge because of back
366 pressure, it may be accepted multiple times, creating pointer
367 misalignment that will corrupt next transfers on that data path
368 until next reset of the system (No recovery procedure once the
369 issue is hit, the path remains consistently broken). Async bridge
370 can be found on path between MPU to EMIF and MPU to L3 interconnect.
371 This situation can happen only when the idle is initiated by a
372 Master Request Disconnection (which is trigged by software when
373 executing WFI on CPU).
374 The work-around for this errata needs all the initiators connected
375 through async bridge must ensure that data path is properly drained
376 before issuing WFI. This condition will be met if one Strongly ordered
377 access is performed to the target right before executing the WFI.
378 In MPU case, L3 T2ASYNC FIFO and DDR T2ASYNC FIFO needs to be drained.
379 IO barrier ensure that there is no synchronisation loss on initiators
380 operating on both interconnect port simultaneously.
Tony Lindgren4a54db62010-07-05 16:31:47 +0300381endmenu
382
383endif