i2c: designware: platdrv: Set class based on DMI (db2a8b6f) · Commits · 戴 / test

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: ("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>

drivers/i2c/busses/i2c-designware-platdrv.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -12,6 +12,7 @@
		#include <linux/clk-provider.h>
		#include <linux/clk.h>
		#include <linux/delay.h>
		#include <linux/dmi.h>
		#include <linux/err.h>
		#include <linux/errno.h>
		#include <linux/i2c.h>
		@@ -191,6 +192,17 @@ static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev)
		return ret;
		}

		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);
		@@ -267,7 +279,8 @@ 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;

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