[PATCH v9 0/4] Implement OCOTP driver for Vybrid using NVMEM

[srinivas.kandagatla@linaro.org (Srinivas Kandagatla)]

Hi Sanchayan,

On 04/09/15 06:50, maitysanchayan at gmail.com wrote:
> Hello,
>
> Ping? Anything preventing this from being accepted? I can rework it then if
> so.
Thanks for your patience,

We are in the middle of merge window, I will pick the driver for 4.4 
after 4.3-rc1 is released for linux-next testing.

--srini

>
> Thanks.
>
> - Sanchayan.
>
> On 15-08-12 18:49:17, Sanchayan Maity wrote:
>> Hello,
>>
>> This patchset is based on top of v9 of Srinivas's NVMEM framework patches.
>> Tested on Greg's tree char-misc-next branch along with Stefan's NAND driver
>> patchset.
>>
>> Sample output on Colibri VF50
>>
>> root at colibri-vf:/sys/bus/nvmem/devices/ocotp0# uname -a
>> Linux colibri-vf 4.2.0-rc6-00130-g24fcfdc #3 SMP Wed Aug 12 18:31:24 IST 2015 armv7l GNU/Linux
>>
>> root at colibri-vf:/sys/bus/nvmem/devices/ocotp0# hexdump nvmem
>> 0000000 0000 0000 0000 0000 0000 0000 0000 0000
>> *
>> 0000410 72a6 df64 0000 0000 0000 0000 0000 0000
>> 0000420 11d4 2c14 0000 0000 0000 0000 0000 0000
>> 0000430 0000 0000 0000 0000 0000 0000 0000 0000
>> *
>> 0000450 0280 0000 0000 0000 0000 0000 0000 0000
>> 0000460 0000 0000 0000 0000 0000 0000 0000 0000
>> *
>> 0000880 8f01 0000 0000 0000 0000 0000 0000 0000
>> 0000890 0000 0000 0000 0000 0000 0000 0000 0000
>> *
>> 00008c0 0000 1000 0000 0000 0000 0000 0000 0000
>> 00008d0 3202 0800 0000 0000 0000 0000 0000 0000
>> 00008e0 0000 e100 0000 0000 0000 0000 0000 0000
>> 00008f0 0000 0000 0000 0000 0000 0000 0000 0000
>> *
>> 0000c80 bada bada 0000 0000 0000 0000 0000 0000
>> *
>> 0000cc0 0000 0000 0000 0000 0000 0000 0000 0000
>> *
>> 0000cf0
>>
>> The driver has changed quite a bit from the first version
>> relying on of_platform_populate in mach file, to using
>> SoC driver under drivers/soc and finally to NVMEM.
>>
>> Feedback and comments most welcome.
>>
>> Version 8 patches can be found here
>> https://lkml.org/lkml/2015/8/10/566
>>
>> Version 7 patches can be found here
>> https://lkml.org/lkml/2015/8/6/440
>>
>> Version 6 RFC patches can be found here
>> http://lkml.iu.edu/hypermail/linux/kernel/1506.2/05123.html
>>
>> Version 5 of the patchset can be found here
>> http://lkml.iu.edu/hypermail/linux/kernel/1506.0/03787.html
>>
>> Version 4 of the patchset can be found here
>> https://lkml.org/lkml/2015/5/26/199
>>
>> Version 3 of the patchset can be found here
>> http://www.spinics.net/lists/arm-kernel/msg420847.html
>>
>> Version 2 of the patchset can be found here
>> http://www.spinics.net/lists/devicetree/msg80654.html
>>
>> Version 1 of the patchset can be found here
>> http://www.spinics.net/lists/devicetree/msg80257.html
>>
>> The RFC version can be found here
>> https://lkml.org/lkml/2015/5/11/13
>>
>> Changes since v8:
>> 1. Fix three lines over 80 characters
>> 2. Rebase on top of Greg's char-misc-next branch
>>
>> Changes since v7:
>> 1. Add COMPILE_TEST to Kconfig
>> 2. Use GENMASK and BIT macros where applicable
>> 3. Fix a code alignment issue
>> 4. Get the max_register value for regmap config using
>> resource_size()
>> 5. Also add copyright info as the driver logic is based off
>> on ocotp code in barebox
>> 6. Add missing info related to clock in DT binding doc
>>
>> Changes since v6:
>> 1. Use the v9 of NVMEM framework patchset
>> 2. Add a few comments
>> 3. Initialise buffer address not part of the fuse map to 0
>> instead of only handling buffer locations with valid fuse
>> addresses.
>>
>> Changes since v5:
>> Use NVMEM framework by Srinivas and Maxime
>>
>> Changes since v4:
>> 1. Use devm_* family of functions and use a struct to get rid of
>> global variables (suggested by Joachim Eastwood)
>> 2. Make Kconfig govern the compilation with tristate, instead of
>> earlier bool. Paul Bolle raised a valid point that perhaps this
>> should have been built in with the bool, however I had not taken
>> into consideration generic distro kernels and it makes sense to
>> have this tristated. (comments from Paul Bolle and Andreas Farber)
>>
>> Changes since v3:
>> Instead of using the syscon_regmap_lookup_by_compatible function
>> use a phandle in the device tree along with offsets specified in
>> this phandle node and then read the offset along with the device
>> node in the driver for reading from the required region.
>>
>> Changes since v2:
>> Implement the SoC bus code as a driver in drivers/soc
>> by registering with fsl,mscm-cpucfg as per Arnd's feedback
>>
>> Changes since v1:
>> Sort the headers in alphabetical order
>>
>> Changes since RFC:
>> Use a DT entry for the ROM area while specifying it as syscon.
>>
>> Thanks & Regards,
>> Sanchayan Maity.
>>
>> Sanchayan Maity (4):
>>    clk: clk-vf610: Add clock for Vybrid OCOTP controller
>>    ARM: dts: vfxxx: Add OCOTP node
>>    drivers: nvmem: Add Vybrid OCOTP support
>>    nvmem: Add DT binding documentation for Vybrid OCOTP driver
>>
>>   .../devicetree/bindings/nvmem/vf610-ocotp.txt      |  21 ++
>>   arch/arm/boot/dts/vfxxx.dtsi                       |   9 +
>>   drivers/clk/imx/clk-vf610.c                        |   1 +
>>   drivers/nvmem/Kconfig                              |  10 +
>>   drivers/nvmem/Makefile                             |   2 +
>>   drivers/nvmem/vf610-ocotp.c                        | 302 +++++++++++++++++++++
>>   include/dt-bindings/clock/vf610-clock.h            |   3 +-
>>   7 files changed, 347 insertions(+), 1 deletion(-)
>>   create mode 100644 Documentation/devicetree/bindings/nvmem/vf610-ocotp.txt
>>   create mode 100644 drivers/nvmem/vf610-ocotp.c
>>
>> --
>> 2.5.0
>>