linux-kernel - Re: [PATCH] usb: misc: onboard_usb_dev: introduce new config symbol for usb5744 SMBus support

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Message-ID: <t4ghbba233fsrq5ec42dbwjzirtmxtmknu6xnenqgizrcqjm5u@w35ssjatzxgb>
Date: Tue, 24 Sep 2024 16:26:20 +0000
From: Matthias Kaehlcke <matthias@...hlcke.net>
To: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
Cc: gregkh@...uxfoundation.org, mka@...omium.org, paul.walmsley@...ive.com, 
	palmer@...belt.com, aou@...s.berkeley.edu, wentong.wu@...el.com, oneukum@...e.com, 
	javier.carrasco@...fvision.net, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-riscv@...ts.infradead.org, git@....com
Subject: Re: [PATCH] usb: misc: onboard_usb_dev: introduce new config symbol
 for usb5744 SMBus support

El Tue, Sep 24, 2024 at 07:49:11PM GMT Radhey Shyam Pandey ha dit:

> Introduce new kernel config symbol for Microchip usb5744 SMBus programming
> support. Since usb5744 i2c initialization routine uses i2c SMBus APIs these
> APIs should only be invoked when kernel has I2C support. This new kernel
> config describes the dependency on I2C kernel support and fix the below
> build issues when USB_ONBOARD_DEV=y and CONFIG_I2C=m.
> 
> riscv64-linux-ld: drivers/usb/misc/onboard_usb_dev.o:
> undefined reference to `i2c_find_device_by_fwnode'
> drivers/usb/misc/onboard_usb_dev.c:408:(.text+0xb24): undefined
> reference to `i2c_smbus_write_block_data'
> <snip>
> 
> Parsing of the i2c-bus bus handle is not put under usb5744 kernel config
> check as the intention is to report an error when DT is configured for
> usb5744 SMBus support and kernel has USB_ONBOARD_DEV_USB5744 disabled.
> 
> Fixes: 6782311d04df ("usb: misc: onboard_usb_dev: add Microchip usb5744 SMBus programming support")
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
> Suggested-by: Matthias Kaehlcke <matthias@...hlcke.net>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202409140539.3Axwv38m-lkp@intel.com/

Acked-by: Matthias Kaehlcke <matthias@...hlcke.net>