topic Re: how to change emmc linux driver in i.MX Processors

how to change emmc linux driver

stevenshi — Wed, 04 Mar 2015 01:27:41 GMT

hi,

my product have change emmc(Sandisk SDIN5C2-8G) to Hynix emmc chip(8GB), but hynix emmc is FPGA153 Ball.(sandisk is 169 ball), i want to konw how to change in linux driver,how to find the freesacle emmc porting guide or document?The OS is Android 4.4.2. i am sw engineer. thank you!

ps: our board based on the reference design for the Sabre board(SDB).

Re: how to change emmc linux driver

jimmychan — Wed, 04 Mar 2015 07:44:44 GMT

if the pins used to connect between EMMC and i.MX6 is not the same as the pins used in SDB, then you need to modify the IOMUX pins setting.

Is there any problem when using the new EMMC? could you describe more?

Re: how to change emmc linux driver

stevenshi — Wed, 04 Mar 2015 09:46:12 GMT

Hi jimmy:

thank you for your supprot!

i am newer on linux driver, i know my first step is use freescale iomux tools to modify pins setting from your comment. i will to study it. but what is next after i modify pins? need i change code on linux kernel? i found /arch/arm/plat-mxc/include//mach/iomux-mx6q.h, i think it need to modify, and any other??

Re: how to change emmc linux driver

jimmychan — Wed, 04 Mar 2015 09:59:02 GMT

Please see the /arch/arm/mach-mx6/board-mx6q_sabresd.h.

If you don't know how to set the IOMUX, please let me know how you connect the EMMC. Then I can show you how to set the IOMUX pins.

Re: how to change emmc linux driver

stevenshi — Thu, 05 Mar 2015 00:53:49 GMT

hi Jimmy:

our eMMC chip is Hynix H26M42003GMR, i only have the schematic, need i upload the eMMC moudle schematic to you?

Re: how to change emmc linux driver

jimmychan — Thu, 05 Mar 2015 04:25:19 GMT

I want to know how you connect the eMMC to the i.MX6.

Please submit a Service Request ticket from here:

Sales and Support|Freescale

--> click "Create Service Request".

Then you can send your schematic to me through the SR ticket.

Re: how to change emmc linux driver

stevenshi — Thu, 05 Mar 2015 07:54:28 GMT

hi jimmy:

i have submit the service request, thanks!

Re: how to change emmc linux driver

jimmychan — Thu, 05 Mar 2015 09:47:12 GMT

After take a quick look, I think you are using the same pins as SDB. So, I think the EMMC should work when the board is up.

Re: how to change emmc linux driver

Rita_Wang — Thu, 12 Mar 2015 09:58:20 GMT

Hi steven,

In our refrence design we use emmc(Sandisk SDIN5C2-8G) with 153ball, when you change the emmc to Hynix emmc chip(8GB) in your design nothing will be modified in linux driver.You can use the driver supplied in freescale's BSP.

Hope this can help you.
Have a great day
Dan

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Re: how to change emmc linux driver

stevenshi — Thu, 12 Mar 2015 10:12:08 GMT

hi Dan:

i have check the SDB/SDP bom list from freescale(SABRESDB_DESIGNFILES/BOM/MCIMX6Q-SDB_C4_BOM.xls)

342-00495

IC INAND MEM FLASH 8GB 2.7-3.6V TFBGA169

U512

SANDISK CORPORATION

SDIN5C2-8G

i understand is wrong?

Re: how to change emmc linux driver

Rita_Wang — Fri, 13 Mar 2015 07:15:47 GMT

Hi steven,

You are right, I make mistake. But in your design, you can use the driver directly in freescale's BSP. No modify.
Have a great day
Dan

Re: how to change emmc linux driver

Rita_Wang — Wed, 18 Mar 2015 02:53:23 GMT

Hi steven,

I wonder if you have solved the problem you meet in this thread. If yes, would you please help close this thread by click the Correct Answer button. If not, you can contact us easily. Many thanks.
Have a great day,
Dan