From: Ricardo Ribalda ribalda@kernel.org
[ Upstream commit db2a8b6f1df93d5311970cca03052c01178de674 ]
Current AMD's zen-based APUs use this core for some of its i2c-buses.
With this patch we re-enable autodetection of hwmon-alike devices, so lm-sensors will be able to work automatically.
It does not affect the boot-time of embedded devices, as the class is set based on the DMI information.
DMI is probed only on Qtechnology QT5222 Industrial Camera Platform.
DocLink: https://qtec.com/camera-technology-camera-platforms/ Fixes: 3eddad96c439 ("i2c: designware: reverts "i2c: designware: Add support for AMD I2C controller"") Signed-off-by: Ricardo Ribalda ribalda@kernel.org Reviewed-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Acked-by: Jarkko Nikula jarkko.nikula@linux.intel.com Signed-off-by: Wolfram Sang wsa@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i2c/busses/i2c-designware-platdrv.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 5536673060cc6..3a9c2cfbef974 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -234,6 +234,17 @@ static const u32 supported_speeds[] = { I2C_MAX_STANDARD_MODE_FREQ, };
+static const struct dmi_system_id dw_i2c_hwmon_class_dmi[] = { + { + .ident = "Qtechnology QT5222", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Qtechnology"), + DMI_MATCH(DMI_PRODUCT_NAME, "QT5222"), + }, + }, + { } /* terminate list */ +}; + static int dw_i2c_plat_probe(struct platform_device *pdev) { struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev); @@ -349,7 +360,8 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
adap = &dev->adapter; adap->owner = THIS_MODULE; - adap->class = I2C_CLASS_DEPRECATED; + adap->class = dmi_check_system(dw_i2c_hwmon_class_dmi) ? + I2C_CLASS_HWMON : I2C_CLASS_DEPRECATED; ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); adap->dev.of_node = pdev->dev.of_node; adap->nr = -1;