CSR ARM SoC Subarchitecture preview

[21cnbao@gmail.com (Barry Song)]

2011/5/25 Barry Song <21cnbao@gmail.com>:
> Hi Arnd,
> thanks! since the discussion has been much different with original
> subject. i move to a new thread.
>
> 2011/5/24 Arnd Bergmann <arnd@arndb.de>:
>> On Tuesday 24 May 2011, Barry Song wrote:
>>> 2011/5/19 Arnd Bergmann <arnd@arndb.de>
>>>
>>> > If you can just post a diffstat of the stuff you currently have,
>>> > we also get an impression of the amount of code that you are
>>> > talking about.
>>> Arnd, thanks very much for thinking. Now the codes are based on 2.6.38
>>> and not quanified for sending patches. we will port them to be
>>> againest linux's tree.
>>
>> Thanks for the diffstat, that is very helpful as an estimate. It appears
>> that there is a large amount of work ahead of you in this, so by the
>> time you get ready for inclusion, we will most certainly require this
>> to be based on device tree for probing of all devices. I'd strongly
>> recommend that you investigate what that means for you before you port
>> a lot of the code to 2.6.39 or 2.6.40.
>>
>> Since the timing is a bit unfortunate for you, you might want to stay
>> on 2.6.38 with the full port and not spend too much time on forward
>> porting all of it, but instead migrate the drivers to be based on
>> device tree properties rather than platform data, so you can submit
>> the drivers individually upstream.
>
> good idea. then i will branch 2.6.38 for merging device tree and other
> new changes.
>
>>
>>> ?mach-prima2/Kconfig ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 32
>>> ?mach-prima2/Makefile ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 11
>>> ?mach-prima2/Makefile.boot ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? ?3
>>> ?mach-prima2/devices.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?191 +
>>> ?mach-prima2/include/mach/cache-sirfsoc-prima2-l2.h ? ? ? ? ? | ? 12
>>> ?mach-prima2/include/mach/clkdev.h ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? ?5
>>> ?mach-prima2/include/mach/debug-macro.S ? ? ? ? ? ? ? ? ? ? ? | ? 38
>>> ?mach-prima2/include/mach/entry-macro.S ? ? ? ? ? ? ? ? ? ? ? | ? 31
>>> ?mach-prima2/include/mach/gpio.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? ?5
>>> ?mach-prima2/include/mach/hardware.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 10
>>> ?mach-prima2/include/mach/io.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 20
>>> ?mach-prima2/include/mach/irqs.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?284 +
>>> ?mach-prima2/include/mach/isa-dma.h ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 13
>>> ?mach-prima2/include/mach/map.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?263 +
>>> ?mach-prima2/include/mach/memory.h ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 56
>>
>> The irqs.h and map.h are the largest by far here, and they should go
>> away for the most part with the move to device tree.
>>
>>> ?mach-prima2/include/mach/prima2.h ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 20
>>> ?mach-prima2/include/mach/prima2_pinmux.h ? ? ? ? ? ? ? ? ? ? | ? 39
>>> ?mach-prima2/include/mach/prima2cb.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ?111
>>
>> There is a new pinmux subsystem in the works, so you probably
>> end up having to write a new driver for that subsystem.
>
> i have noticed the pinmux from Linus Walleij. that is a task we want to do.
>
>>
>>> ?mach-prima2/include/mach/regs-iobrg.h ? ? ? ? ? ? ? ? ? ? ? ?| ? 54
>>> ?mach-prima2/include/mach/regs-irq.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 42
>>> ?mach-prima2/include/mach/regs-reset.h ? ? ? ? ? ? ? ? ? ? ? ?| ? 88
>>> ?mach-prima2/include/mach/regs-rsc.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 76
>>
>> For the registers, they can go together with the respective drivers
>> using them.
>
> ok. looks like they should be limited to use in special drivers for
> low coupling and other drivers call functions not access registers
> directly.
> then i will check whether they are overall shared, which cause them be
> in mach head files.
>
>>
>>> ?mach-prima2/include/mach/system.h ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? ?5
>>> ?mach-prima2/include/mach/timex.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? ?5
>>> ?mach-prima2/include/mach/uncompress.h ? ? ? ? ? ? ? ? ? ? ? ?| ? 45
>>> ?mach-prima2/include/mach/vmalloc.h ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 19
>>> ?mach-prima2/lcdinit.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?136
>>> ?mach-prima2/mach-prima2cb.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?226 +
>>> ?mach-prima2/padmode.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?139
>>> ?mach-prima2/prima2.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 81
>>> ?mach-prima2/prima2cb-keypad.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?136
>>> ?mach-prima2/pwrc.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?286 +
>>> ?mach-prima2/tsc2100_dev.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?137
>>
>> Any drivers in here should get moved to a proper place in drivers/*/
>> eventually, out of the subarchitecture code.
>
> things related with driver framework/callbacks will be moved out.
> platform_device data/hardware-related callbacks will be kept. but if
> device tree supports platform_device data/callbacks good, i will take
> a look whether we can delete as many as possible.
>
>>
>>> ?mm/Kconfig ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 13
>>> ?mm/Makefile ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? ?1
>>> ?mm/cache-sirfsoc-prima2-l2.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?342 +
>>> ?plat-sirfsoc/Kconfig ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?108
>>> ?plat-sirfsoc/Makefile ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 34
>>> ?plat-sirfsoc/adc.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | 1395 ++++++++
>>> ?plat-sirfsoc/adcprocfs.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?348 ++
>>> ?plat-sirfsoc/apm.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?107
>>> ?plat-sirfsoc/clock.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | 1045 ++++++
>>> ?plat-sirfsoc/clock.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 32
>>> ?plat-sirfsoc/core.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?245 +
>>> ?plat-sirfsoc/cpufreq.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?239 +
>>> ?plat-sirfsoc/deepsleep.S ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?425 ++
>>> ?plat-sirfsoc/dma.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?386 ++
>>> ?plat-sirfsoc/hibernate.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?118
>>
>> Same here.
>>
>>> ?plat-sirfsoc/include/plat/audio_controller.h ? ? ? ? ? ? ? ? | ?333 +
>>> ?plat-sirfsoc/include/plat/belmont.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 92
>>> ?plat-sirfsoc/include/plat/bootmem.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 45
>>> ?plat-sirfsoc/include/plat/clkdev.h ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 15
>>> ?plat-sirfsoc/include/plat/cpld.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 27
>>> ?plat-sirfsoc/include/plat/cpld_evb.h ? ? ? ? ? ? ? ? ? ? ? ? | ?200 +
>>> ?plat-sirfsoc/include/plat/cpld_fpga.h ? ? ? ? ? ? ? ? ? ? ? ?| ?201 +
>>> ?plat-sirfsoc/include/plat/cpu.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 51
>>> ?plat-sirfsoc/include/plat/debug-macro.S ? ? ? ? ? ? ? ? ? ? ?| ? 34
>>> ?plat-sirfsoc/include/plat/gpio.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 92
>>> ?plat-sirfsoc/include/plat/hardware.h ? ? ? ? ? ? ? ? ? ? ? ? | ? 28
>>> ?plat-sirfsoc/include/plat/iobrg.h ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 17
>>> ?plat-sirfsoc/include/plat/irqs.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?320 +
>>> ?plat-sirfsoc/include/plat/isa-dma.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ?111
>>> ?plat-sirfsoc/include/plat/lcd_panels.h ? ? ? ? ? ? ? ? ? ? ? | ? 33
>>> ?plat-sirfsoc/include/plat/map.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?233 +
>>> ?plat-sirfsoc/include/plat/memory.h ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 43
>>> ?plat-sirfsoc/include/plat/perfmon.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 62
>>> ?plat-sirfsoc/include/plat/pinmux.h ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 23
>>
>> It's not clear yet what will happen in the long run to the split between
>> mach-* and plat-* directories. Ideally, we would not need them to be
>> separate if we can completely abstract the SoCs within their broader
>> families, but we might not get that far before you merge your platform.
>
> before prima2 SoC, we have mach-atlas4, ?mach-atlas5 and mach-prima.
> after prima2, we will have mach-atlas6. many ip cores are shared
> between these SoCs, then there is a plat.
> but we will not maintain old mach-atlas4, ?mach-atlas5 and mach-prima
> for the current and future kernel. the new mach-atlas6 is the coming
> SoC we will upstream after mach-prima2.
>
>>
>> What other mach-* do you expect to see in the future using plat-sirfsoc,
>> and how similar are they to prima2?
>
> plat-sirfsoc should be things shared by mach-prima2/mach-atlas6 and
> other future SoCs.
>
>>
>>> ?plat-sirfsoc/include/plat/platform_device/android_usb_dev.h ?| ? 27
>>> ?plat-sirfsoc/include/plat/platform_device/audio.h ? ? ? ? ? ?| ? 28
>>> ?plat-sirfsoc/include/plat/platform_device/bt_codec.h ? ? ? ? | ? 26
>>> ?plat-sirfsoc/include/plat/platform_device/eth.h ? ? ? ? ? ? ?| ? 26
>>> ?plat-sirfsoc/include/plat/platform_device/gps.h ? ? ? ? ? ? ?| ? 40
>>> ?plat-sirfsoc/include/plat/platform_device/i2c.h ? ? ? ? ? ? ?| ? 27
>>> ?plat-sirfsoc/include/plat/platform_device/inner_audio.h ? ? ?| ? 26
>>> ?plat-sirfsoc/include/plat/platform_device/lcd.h ? ? ? ? ? ? ?| ? 85
>>> ?plat-sirfsoc/include/plat/platform_device/mbx.h ? ? ? ? ? ? ?| ? 37
>>> ?plat-sirfsoc/include/plat/platform_device/modac.h ? ? ? ? ? ?| ? 26
>>> ?plat-sirfsoc/include/plat/platform_device/mved.h ? ? ? ? ? ? | ? 36
>>> ?plat-sirfsoc/include/plat/platform_device/nand.h ? ? ? ? ? ? | ? 27
>>> ?plat-sirfsoc/include/plat/platform_device/pmem.h ? ? ? ? ? ? | ? 27
>>> ?plat-sirfsoc/include/plat/platform_device/pwm_dev.h ? ? ? ? ?| ? 31
>>> ?plat-sirfsoc/include/plat/platform_device/rtc.h ? ? ? ? ? ? ?| ? 27
>>> ?plat-sirfsoc/include/plat/platform_device/sata.h ? ? ? ? ? ? | ? 33
>>> ?plat-sirfsoc/include/plat/platform_device/sd.h ? ? ? ? ? ? ? | ? 31
>>> ?plat-sirfsoc/include/plat/platform_device/serial.h ? ? ? ? ? | ? 82
>>> ?plat-sirfsoc/include/plat/platform_device/sirfsoc_ts.h ? ? ? | ? 31
>>> ?plat-sirfsoc/include/plat/platform_device/snd.h ? ? ? ? ? ? ?| ? 30
>>> ?plat-sirfsoc/include/plat/platform_device/spi.h ? ? ? ? ? ? ?| ? 53
>>> ?plat-sirfsoc/include/plat/platform_device/spi_sirfsoc_gpio.h | ? 34
>>> ?plat-sirfsoc/include/plat/platform_device/ts_stream_mode.h ? | ? 26
>>> ?plat-sirfsoc/include/plat/platform_device/usb.h ? ? ? ? ? ? ?| ? 40
>>> ?plat-sirfsoc/include/plat/platform_device/usppcm.h ? ? ? ? ? | ? 25
>>> ?plat-sirfsoc/include/plat/platform_device/uspserial.h ? ? ? ?| ? 45
>>> ?plat-sirfsoc/include/plat/platform_device/uspspi.h ? ? ? ? ? | ? 33
>>> ?plat-sirfsoc/include/plat/platform_device/vpp.h ? ? ? ? ? ? ?| ? 27
>>> ?plat-sirfsoc/include/plat/platform_device/vxd.h ? ? ? ? ? ? ?| ? 27
>>> ?plat-sirfsoc/include/plat/platform_device/wdt.h ? ? ? ? ? ? ?| ? 26
>>> ?plat-sirfsoc/platform_device/Makefile ? ? ? ? ? ? ? ? ? ? ? ?| ? 36
>>> ?plat-sirfsoc/platform_device/android_usb_dev.c ? ? ? ? ? ? ? | ? 60
>>> ?plat-sirfsoc/platform_device/audio_dev.c ? ? ? ? ? ? ? ? ? ? | ? 88
>>> ?plat-sirfsoc/platform_device/bt_codec_dev.c ? ? ? ? ? ? ? ? ?| ? 26
>>> ?plat-sirfsoc/platform_device/camera_dev.c ? ? ? ? ? ? ? ? ? ?| ?286 +
>>> ?plat-sirfsoc/platform_device/eth_dev.c ? ? ? ? ? ? ? ? ? ? ? | ? 75
>>> ?plat-sirfsoc/platform_device/gps_dev.c ? ? ? ? ? ? ? ? ? ? ? | ?106
>>> ?plat-sirfsoc/platform_device/i2c_dev.c ? ? ? ? ? ? ? ? ? ? ? | ?124
>>> ?plat-sirfsoc/platform_device/inner_audio_dev.c ? ? ? ? ? ? ? | ? 75
>>> ?plat-sirfsoc/platform_device/lcd_dev.c ? ? ? ? ? ? ? ? ? ? ? | ?156
>>> ?plat-sirfsoc/platform_device/mbx_dev.c ? ? ? ? ? ? ? ? ? ? ? | ? 74
>>> ?plat-sirfsoc/platform_device/modac_dev.c ? ? ? ? ? ? ? ? ? ? | ? 67
>>> ?plat-sirfsoc/platform_device/mved_dev.c ? ? ? ? ? ? ? ? ? ? ?| ? 70
>>> ?plat-sirfsoc/platform_device/nand_dev.c ? ? ? ? ? ? ? ? ? ? ?| ? 75
>>> ?plat-sirfsoc/platform_device/pmem_dev.c ? ? ? ? ? ? ? ? ? ? ?| ? 59
>>> ?plat-sirfsoc/platform_device/pwm_device.c ? ? ? ? ? ? ? ? ? ?| ? 79
>>> ?plat-sirfsoc/platform_device/sata_dev.c ? ? ? ? ? ? ? ? ? ? ?| ? 64
>>> ?plat-sirfsoc/platform_device/sdmmc_dev.c ? ? ? ? ? ? ? ? ? ? | ?108
>>> ?plat-sirfsoc/platform_device/serial_dev.c ? ? ? ? ? ? ? ? ? ?| ?241 +
>>> ?plat-sirfsoc/platform_device/sirfsoc_rtcdev.c ? ? ? ? ? ? ? ?| ? 78
>>> ?plat-sirfsoc/platform_device/sirfsoc_tsdev.c ? ? ? ? ? ? ? ? | ? 65
>>> ?plat-sirfsoc/platform_device/spi_dev.c ? ? ? ? ? ? ? ? ? ? ? | ?163
>>> ?plat-sirfsoc/platform_device/spigpio_dev.c ? ? ? ? ? ? ? ? ? | ? 75
>>> ?plat-sirfsoc/platform_device/ts_stream_mode_dev.c ? ? ? ? ? ?| ? 64
>>> ?plat-sirfsoc/platform_device/usb_dev.c ? ? ? ? ? ? ? ? ? ? ? | ?120
>>> ?plat-sirfsoc/platform_device/usppcm_dev.c ? ? ? ? ? ? ? ? ? ?| ? 69
>>> ?plat-sirfsoc/platform_device/uspserial_dev.c ? ? ? ? ? ? ? ? | ?197 +
>>> ?plat-sirfsoc/platform_device/uspspi_dev.c ? ? ? ? ? ? ? ? ? ?| ? 97
>>> ?plat-sirfsoc/platform_device/vpp_dev.c ? ? ? ? ? ? ? ? ? ? ? | ? 70
>>> ?plat-sirfsoc/platform_device/vxd_dev.c ? ? ? ? ? ? ? ? ? ? ? | ? 68
>>> ?plat-sirfsoc/platform_device/wdt_dev.c ? ? ? ? ? ? ? ? ? ? ? | ? 41
>>
>> These will probably all get replaced with device tree bindings.
>
> good.
>
>>
>>> ?plat-sirfsoc/include/plat/pm.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 41
>>> ?plat-sirfsoc/include/plat/pwm.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 63
>>> ?plat-sirfsoc/include/plat/regs-clkc.h ? ? ? ? ? ? ? ? ? ? ? ?| ? 33
>>> ?plat-sirfsoc/include/plat/regs-gpio.h ? ? ? ? ? ? ? ? ? ? ? ?| ? 43
>>> ?plat-sirfsoc/include/plat/regs-irq.h ? ? ? ? ? ? ? ? ? ? ? ? | ? 39
>>> ?plat-sirfsoc/include/plat/regs-modac.h ? ? ? ? ? ? ? ? ? ? ? | ?114
>>> ?plat-sirfsoc/include/plat/regs-power.h ? ? ? ? ? ? ? ? ? ? ? | ? 77
>>> ?plat-sirfsoc/include/plat/regs-pwm.h ? ? ? ? ? ? ? ? ? ? ? ? | ? 37
>>> ?plat-sirfsoc/include/plat/regs-pwrc.h ? ? ? ? ? ? ? ? ? ? ? ?| ? 62
>>> ?plat-sirfsoc/include/plat/regs-reset.h ? ? ? ? ? ? ? ? ? ? ? | ? 73
>>> ?plat-sirfsoc/include/plat/regs-rsc.h ? ? ? ? ? ? ? ? ? ? ? ? | ? 78
>>> ?plat-sirfsoc/include/plat/regs-rtc.h ? ? ? ? ? ? ? ? ? ? ? ? | ? 41
>>> ?plat-sirfsoc/include/plat/regs-serial.h ? ? ? ? ? ? ? ? ? ? ?| ? 87
>>> ?plat-sirfsoc/include/plat/regs-timer.h ? ? ? ? ? ? ? ? ? ? ? | ? 39
>>> ?plat-sirfsoc/include/plat/regs-vip.h ? ? ? ? ? ? ? ? ? ? ? ? | ? 98
>>> ?plat-sirfsoc/include/plat/sd.h ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?110
>>> ?plat-sirfsoc/include/plat/sirfsoc_adc.h ? ? ? ? ? ? ? ? ? ? ?| ?261 +
>>> ?plat-sirfsoc/include/plat/sirfsoc_usp.h ? ? ? ? ? ? ? ? ? ? ?| ?288 +
>>
>> And these can hopefully all get moved next to the respective drivers.
>
> good.
>
>>
>>> ?plat-sirfsoc/include/plat/system.h ? ? ? ? ? ? ? ? ? ? ? ? ? | ? 39
>>> ?plat-sirfsoc/include/plat/timex.h ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 33
>>> ?plat-sirfsoc/include/plat/uncompress.h ? ? ? ? ? ? ? ? ? ? ? | ? 46
>>> ?plat-sirfsoc/include/plat/vmalloc.h ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 26
>>> ?plat-sirfsoc/irq.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?102
>>> ?plat-sirfsoc/lcd_panels.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?281 +
>>> ?plat-sirfsoc/led.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ?340 +
>>> ?plat-sirfsoc/perfmon.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | 1347 +++++++
>>
>> For the perfmon implementation, I would recommend splitting it out of the
>> submission at the beginning. If it's based on perf, it should be easy to
>> add at a later stage. Otherwise, it's not going anywhere. If it's related
>> to the ARM system trace macrocell, I'd recommend posting the code now
>> (independent of the rest), because other people are interested in getting
>> that to work.
> sorry for not exculding this file in diff.
> perfmon is a IP included by our old atlas5 and doesn't exist in
> prima2, which exports bus bandwidth and latency. it is not related
> with STM. and it is not based on perf too. ?people wrote this driver a
> long time ago and simply exported some registers to userspace by proc.
> it should not be in our final patches.
>
>>
>>> ?plat-sirfsoc/pinmux.c ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ?992 +++++
>>
>> -> pinmux subsystem
>>
>>> for drivers/:
>>> ?Kconfig ? ? ? ? ? ? ? ? ? ? ? ? ? ? | ? ?2
>>> ?Makefile ? ? ? ? ? ? ? ? ? ? ? ? ? ?| ? ?1
>>> ?char/sirfsoc_gps.c ? ? ? ? ? ? ? ? ?| ?878 +++++++++++++
>>> ?char/sirfsoc_gpsdrv.h ? ? ? ? ? ? ? | ?134 +
>>> ?input/misc/gpio_event.c ? ? ? ? ? ? | ?253 +++
>>
>> A new user space interface is always hard to establish. If you want these
>> to get in, you should start way ahead of the other drivers that simply
>> implement an existing interface.
>>
>> If the gps driver is just a tty device like a serial port, it should
>> now be moved into drivers/tty.
>
> most GPS are /dev/ttySn to userspace, they are connected to SoC by
> uart. ?DSP is one of CSR's main product lines. An internal DSP in SoC

sorry for typo. *GPS* is one of CSR's main product lines.

> handles GPS and we use this driver to communicate with the DSP. i will
> take a look whether we can have better framework than a simple char
> device.
>
>>
>>> ?nanddisk/Kconfig ? ? ? ? ? ? ? ? ? ?| ? 17
>>> ?nanddisk/Makefile ? ? ? ? ? ? ? ? ? | ? ?5
>>> ?nanddisk/nand.c ? ? ? ? ? ? ? ? ? ? | ?937 +++++++++++++
>>> ?nanddisk/nanddisk.h ? ? ? ? ? ? ? ? | ?702 ++++++++++
>>
>> How does this relate to drivers/mtd?
>
> that is a big issue to upstream. CSR built a NTFL supporting both
> WINCE/Linux with good performance and proved reliable products. the
> NTFL is a binary. NAND disk is a up level block driver to call API in
> the NTFL binary.
> that makes the NAND related codes very difficult to be accepted since
> it is completely not based on MTD. i hope we can also have a MTD based
> driver and compare the performance of ?UBI on MTD and current
> solution.
>
>>
>>> ?net/dm9000.c ? ? ? ? ? ? ? ? ? ? ? ?| ?290 +---
>>> ?net/dm9000.h ? ? ? ? ? ? ? ? ? ? ? ?| ? ?8
>>
>> Ah, code removal ;-)
>
> sure. some guys hacked dm9000 to make it work on my debug board. but
> it is unneccessary since we can modify related platform data in
> arch/arm.
>
>>
>>> ?video/Kconfig ? ? ? ? ? ? ? ? ? ? ? | ? 24
>>> ?video/Makefile ? ? ? ? ? ? ? ? ? ? ?| ? ?2
>>> ?video/backlight/Makefile ? ? ? ? ? ?| ? ?1
>>> ?video/sirfsoc_clcdc.h ? ? ? ? ? ? ? | ?269 ++++
>>> ?video/sirfsoc_fb.c ? ? ? ? ? ? ? ? ?| 2369 +++++++++++++++++++++++++++++++++++
>>> ?video/sirfsoc_vpp.c ? ? ? ? ? ? ? ? | 1166 +++++++++++++++++
>>
>> Have you considered doing a KMS device driver instead of an old-style
>> frame buffer?
>
> it depends on the whole schedule and resources of the related teams.
> i'd like to see the stronger KMS driver.
>
>>
>>> i want to upstream steps by steps. send arch/arm patches for reviewing
>>> at first, then clean-up drivers and send patches to subsystem for
>>> reviewing. There are really too many issues waiting for refination in
>>> arch/arm for the moment, we have more than 20 tasks for team to work.
>>
>> Ok, no problem.
>>
>> ? ? ? ?Arnd
>>
> -barry
>