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Date: Wed, 3 Aug 2022 17:56:55 +0530 From: Nipun Gupta <nipun.gupta@....com> To: <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <gregkh@...uxfoundation.org>, <rafael@...nel.org>, <maz@...nel.org>, <tglx@...utronix.de> CC: <okaya@...nel.org>, <harpreet.anand@....com>, <michal.simek@....com>, <nikhil.agarwal@....com>, Nipun Gupta <nipun.gupta@....com> Subject: [RFC PATCH 2/2] driver core: add compatible string in sysfs for platform devices For devices registered dynamically using platform_device_register API, this patch exposes the sysfs entry for the compatible string. Signed-off-by: Nipun Gupta <nipun.gupta@....com> --- drivers/base/platform.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 51bb2289865c..89949f88a0a1 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1289,10 +1289,25 @@ static ssize_t driver_override_store(struct device *dev, } static DEVICE_ATTR_RW(driver_override); +static ssize_t compatible_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + const char *compat; + int ret; + + ret = device_property_read_string(dev, "compatible", &compat); + if (ret != 0) + return 0; + + return sysfs_emit(buf, "%s", compat); +} +static DEVICE_ATTR_RO(compatible); + static struct attribute *platform_dev_attrs[] = { &dev_attr_modalias.attr, &dev_attr_numa_node.attr, &dev_attr_driver_override.attr, + &dev_attr_compatible.attr, NULL, }; -- 2.25.1
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