linux-kernel - Re: [PATCH v4 3/5] spi: spi-qpic: Add qpic spi nand driver support

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Date: Sun, 7 Apr 2024 20:54:47 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: "Alex G." <mr.nuke.me@...il.com>, Md Sadre Alam
 <quic_mdalam@...cinc.com>, andersson@...nel.org, konrad.dybcio@...aro.org,
 broonie@...nel.org, robh@...nel.org, krzysztof.kozlowski+dt@...aro.org,
 conor+dt@...nel.org, miquel.raynal@...tlin.com, richard@....at,
 vigneshr@...com, manivannan.sadhasivam@...aro.org,
 neil.armstrong@...aro.org, daniel@...rotopia.org, arnd@...db.de,
 chris.packham@...iedtelesis.co.nz, christophe.kerello@...s.st.com,
 linux-arm-msm@...r.kernel.org, linux-spi@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-mtd@...ts.infradead.org
Cc: quic_srichara@...cinc.com, quic_varada@...cinc.com
Subject: Re: [PATCH v4 3/5] spi: spi-qpic: Add qpic spi nand driver support

On 07/04/2024 19:48, Alex G. wrote:
> On 3/8/24 03:17, Md Sadre Alam wrote:
>> Add qpic spi nand driver support. The spi nand
>> driver currently supported the below commands.
>>
>> -- RESET
>> -- READ ID
>> -- SET FEATURE
>> -- GET FEATURE
>> -- READ PAGE
>> -- WRITE PAGE
>> -- ERASE PAGE
>>
>> Co-developed-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
>> Signed-off-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
>> Co-developed-by: Varadarajan Narayanan <quic_varada@...cinc.com>
>> Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
>> Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
>> ---
> 
> For the entire series:
> 
> Tested-by: Alexandru Gagniuc <mr.nuke.me@...il.com>
> 
>> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
>> index bc7021da2fe9..63764e943d82 100644
>> --- a/drivers/spi/Kconfig
>> +++ b/drivers/spi/Kconfig
>> @@ -882,6 +882,14 @@ config SPI_QCOM_QSPI
>>   	help
>>   	  QSPI(Quad SPI) driver for Qualcomm QSPI controller.
>>   
>> +config SPI_QPIC_SNAND
>> +	tristate "QPIC SNAND controller"
>> +	depends on ARCH_QCOM || COMPILE_TEST
> 
> Here, it needs to 'select QPIC_COMMON`. Otherwise it can run into 
> unresolved symbols:
> 
> : drivers/spi/spi-qpic-snand.o: in function `snandc_set_reg':
>   drivers/spi/spi-qpic-snand.c:56:(.text+0x484): undefined reference to 
> `qcom_offset_to_nandc_reg'

No, do not select user-visible symbols. If you observe such issues then
either stubs are missing or depends on.

Best regards,
Krzysztof