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usb: misc: onboard_usb_dev: introduce new config symbol for usb5744 SMBus support

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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: 6782311d04 ("usb: misc: onboard_usb_dev: add Microchip usb5744 SMBus programming support")
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Suggested-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202409140539.3Axwv38m-lkp@intel.com/
Acked-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Link: https://lore.kernel.org/r/1727529992-476088-1-git-send-email-radhey.shyam.pandey@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Radhey Shyam Pandey 2024-09-28 18:56:32 +05:30 committed by Greg Kroah-Hartman
parent 0d410e8913
commit 6c4e1ef46c
2 changed files with 16 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/usb/misc/Kconfig
View File

@ -331,3 +331,15 @@ config USB_ONBOARD_DEV
this config will enable the driver and it will automatically
match the state of the USB subsystem. If this driver is a
module it will be called onboard_usb_dev.
config USB_ONBOARD_DEV_USB5744
bool "Onboard USB Microchip usb5744 hub with SMBus support"
depends on (USB_ONBOARD_DEV && I2C=y) || (USB_ONBOARD_DEV=m && I2C=m)
help
Say Y here if you want to support onboard USB Microchip usb5744
hub that requires SMBus initialization.
This options enables usb5744 i2c default initialization sequence
during hub start-up configuration stage. It is must to enable this
option on AMD Kria KR260 Robotics Starter Kit as this hub is
connected to USB-SD converter which mounts the root filesystem.

6
drivers/usb/misc/onboard_usb_dev.c
View File

@ -311,7 +311,7 @@ static void onboard_dev_attach_usb_driver(struct work_struct *work)
static int onboard_dev_5744_i2c_init(struct i2c_client *client)
{
#if IS_ENABLED(CONFIG_I2C)
#if IS_ENABLED(CONFIG_USB_ONBOARD_DEV_USB5744)
struct device *dev = &client->dev;
int ret;
@ -394,9 +394,11 @@ static int onboard_dev_probe(struct platform_device *pdev)
i2c_node = of_parse_phandle(pdev->dev.of_node, "i2c-bus", 0);
if (i2c_node) {
struct i2c_client *client;
struct i2c_client *client = NULL;
#if IS_ENABLED(CONFIG_USB_ONBOARD_DEV_USB5744)
client = of_find_i2c_device_by_node(i2c_node);
#endif
of_node_put(i2c_node);
if (!client) {