boards/cxd56xx/spresense: add fs automount driver for SD Card

[pkarashchenko]

Summary

Add FS automount driver for SD Card.

This is the first step to remove BOARDIOC_SDCARD_SETNOTIFYCB

Options to enable functionality:

CONFIG_CXD56_SDCARD_AUTOMOUNT=y
CONFIG_FS_AUTOMOUNTER=y
CONFIG_FS_AUTOMOUNTER_DRIVER=y

Impact

New nsh_automount configuration added

Testing

Tested with spresense board

[pkarashchenko]

@SPRESENSE have you had a chance to try this changes?

[pkarashchenko]

@SPRESENSE maybe you can recommend me the board (send me link to the board), so I can purchase it locally and try changes by myself?

[xiaoxiang781216]

@jerpelea @masayuki2009 could you help verify the change?

[jerpelea]

@xiaoxiang781216 I cant test until next week
@masayuki2009 can you please test the code?

[jerpelea]

@SPRESENSE maybe you can recommend me the board (send me link to the board), so I can purchase it locally and try changes by myself?

@pkarashchenko please contact me by mail

[masayuki2009]

@pkarashchenko

CC:  board/cxd56_sdcard.c
board/cxd56_sdcard.c: In function 'board_sdcard_disable':
board/cxd56_sdcard.c:205:7: warning: unused variable 'ret' [-Wunused-variable]
  205 |   int ret;
      |       ^~~

[masayuki2009]

@pkarashchenko

I added the following configs to spresense:rndis

CONFIG_CXD56_SDCARD_AUTOMOUNT=y
CONFIG_FS_AUTOMOUNTER=y
CONFIG_FS_AUTOMOUNTER_DRIVER=y

However, the sd card was not mounted.

NuttShell (NSH) NuttX-3.6.1
nsh> uname -a
NuttX  3.6.1 f590b13f0a-dirty Dec  7 2022 09:36:05 arm spresense
nsh> ps
  PID GROUP PRI POLICY   TYPE    NPX STATE    EVENT     SIGMASK   STACK   USED  FILLED COMMAND
    0     0   0 FIFO     Kthread N-- Ready              00000000 001000 000384  38.4%  Idle Task
    1     1 224 RR       Kthread --- Waiting  Semaphore 00000000 001992 000300  15.0%  hpwork 0x2d053ad0
    2     2 100 RR       Kthread --- Waiting  Semaphore 00000000 001992 000300  15.0%  lpwork 0x2d053ae8
    3     3 100 RR       Task    --- Running            00000000 003024 001444  47.7%  spresense_main
    4     4 200 RR       Task    --- Waiting  MQ empty  00000000 000976 000456  46.7%  cxd56_pm_task
    6     6 100 RR       Task    --- Waiting  Semaphore 00000000 002008 000620  30.8%  telnetd
nsh> mount
  /mnt/spif type smartfs
  /proc type procfs

[pkarashchenko]

@masayuki2009 thank you very much for spending time on this. So I will need to wait some time until I get the board and will debug it "on the desk".

[pkarashchenko]

@masayuki2009 @jerpelea finally I was able to finalize this PR and test with spresense board. Could you please try spresense:nsh_automount config at your end?

[pkarashchenko]

@masayuki2009 instead of adding a new config I can add SD card automount to all existing configs with CXD56_SDIO=y. What do you think? But now it is either FS automount or a driver callback, but not both. So maybe we need to make changes in few steps.

[masayuki2009]

@pkarashchenko

@masayuki2009 @jerpelea finally I was able to finalize this PR and test with spresense board. Could you please try spresense:nsh_automount config at your end?

I confirmed that spresense:nsh_automount works with my board.

@masayuki2009 instead of adding a new config I can add SD card automount to all existing configs with CXD56_SDIO=y. What do you think? But now it is either FS automount or a driver callback, but not both. So maybe we need to make changes in few steps.

I think that adding a new config for automount is enough so far.