IMX6SX SDB

[hyoungkikim]

Hi experts 

i am designing  a custom board based on imx6sx sdb

i want to a custom board  to boot from QSPI flash on QSPI1 but QSPI2 ( which is a case of imx6sx sdb)

i have some questions in moving QSPI2A flash (from SDB) to QSPIA

1.  on imx6sx sdb   there is a "PMIC_INT_B" which connected between cpu and pmic 

but i can't find any source in u-boot and kernel,  there is no irq related source in pmic driver

what does  the PMIC_INT_B do    ?   if i missed something , let me know 

2. in u-boot  there is a qspi_header ,  do i need to modify that  file ? 

in qspi_header   ," the Serial Flash Port B selection " and "CS1 on Port A"  , i can't understand what they do 

in which situation should i use that configuration ?

3  in QSPI booting,  QSPIA/B , SS0,SS1 are all supported ?  

thank you 

[Sanket_Parekh]

Hi @hyoungkikim 

I hope you are doing well

Please find the answer below.

1) PMIC_INT_B is an interrupt signal, when this pin is low interrupt will be generated.

Please refer to section 6.5.3 Interrupt handling from the datasheet.

2) For the configuration of QSPI one can refer the section 8.6.3 QuadSPI configuration parameters from the reference manual.

3) Yes, For more details kindly refer to Table 8-27. QSPI IOMUX pin configuration in the Reference manual.

for more information, one can refer below thread.

 iMX6SX QSPI boot

Booting U-boot on i.MX6 Solo X from QSPI on SABRE-SD

Thanks & Regards

Sanket Parekh

[hyoungkikim]

Hi  Sanket_Parekh

your reply about QSPI will be of great help

about  PMIC_INT_B    does u-boot and kernel from LF_v5.15.52-2.1.0   use that PIN ? 

i couldn't find any source about it  ,  i want to use  QSPI1 as boot device , so i tried to find  QSPI1 Pin related  source and remove or commnet out , i almost found them except  PMIC_INT_B  

thank you 

sincerely 

[Sanket_Parekh]

Hi @hyoungkikim 

I hope you are doing well

Yes, there is no such reference in the uboot or kernel as the PMIC_INT_B pin is related to the PMIC. We don't think so there is anything to do with this pin for the QSPI boot.

Thanks & Regards

Sanket Parekh