Commit db2a8b6f authored by Ricardo Ribalda's avatar Ricardo Ribalda Committed by Wolfram Sang

i2c: designware: platdrv: Set class based on DMI

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: 3eddad96 ("i2c: designware: reverts "i2c: designware: Add support for AMD I2C controller"")
Signed-off-by: default avatarRicardo Ribalda <ribalda@kernel.org>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatarJarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
parent cd217f23
...@@ -12,6 +12,7 @@ ...@@ -12,6 +12,7 @@
#include <linux/clk-provider.h> #include <linux/clk-provider.h>
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/errno.h> #include <linux/errno.h>
#include <linux/i2c.h> #include <linux/i2c.h>
...@@ -191,6 +192,17 @@ static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev) ...@@ -191,6 +192,17 @@ static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev)
return ret; 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) static int dw_i2c_plat_probe(struct platform_device *pdev)
{ {
struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev); 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) ...@@ -267,7 +279,8 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
adap = &dev->adapter; adap = &dev->adapter;
adap->owner = THIS_MODULE; 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)); ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));
adap->dev.of_node = pdev->dev.of_node; adap->dev.of_node = pdev->dev.of_node;
adap->nr = -1; adap->nr = -1;
......
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