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| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2019-07-24 04:05:11 +0530 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2019-08-05 14:56:30 -0700 |
| commit | 9aebf4de220344e2f03ae6386272bf98f80fd295 (patch) | |
| tree | ad37ed085240cbfe96935ba1999c38dd804da85b /drivers/base/soc.c | |
| parent | af311ff9a69189a03548efd5a47d4bb44644fd45 (diff) | |
| download | lwn-9aebf4de220344e2f03ae6386272bf98f80fd295.tar.gz lwn-9aebf4de220344e2f03ae6386272bf98f80fd295.zip | |
base: soc: Add serial_number attribute to soc
Add new attribute named "serial_number" as a standard interface for
user space to acquire the serial number of the device.
For ST-Ericsson SoCs this is exposed by the cryptically named "soc_id"
attribute, but this provides a human readable standardized name for this
property.
Tested-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/base/soc.c')
| -rw-r--r-- | drivers/base/soc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/base/soc.c b/drivers/base/soc.c index 10b280f30217..b0933b9fe67f 100644 --- a/drivers/base/soc.c +++ b/drivers/base/soc.c @@ -33,6 +33,7 @@ static struct bus_type soc_bus_type = { static DEVICE_ATTR(machine, S_IRUGO, soc_info_get, NULL); static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL); +static DEVICE_ATTR(serial_number, S_IRUGO, soc_info_get, NULL); static DEVICE_ATTR(soc_id, S_IRUGO, soc_info_get, NULL); static DEVICE_ATTR(revision, S_IRUGO, soc_info_get, NULL); @@ -57,6 +58,9 @@ static umode_t soc_attribute_mode(struct kobject *kobj, if ((attr == &dev_attr_revision.attr) && (soc_dev->attr->revision != NULL)) return attr->mode; + if ((attr == &dev_attr_serial_number.attr) + && (soc_dev->attr->serial_number != NULL)) + return attr->mode; if ((attr == &dev_attr_soc_id.attr) && (soc_dev->attr->soc_id != NULL)) return attr->mode; @@ -77,6 +81,8 @@ static ssize_t soc_info_get(struct device *dev, return sprintf(buf, "%s\n", soc_dev->attr->family); if (attr == &dev_attr_revision) return sprintf(buf, "%s\n", soc_dev->attr->revision); + if (attr == &dev_attr_serial_number) + return sprintf(buf, "%s\n", soc_dev->attr->serial_number); if (attr == &dev_attr_soc_id) return sprintf(buf, "%s\n", soc_dev->attr->soc_id); @@ -87,6 +93,7 @@ static ssize_t soc_info_get(struct device *dev, static struct attribute *soc_attr[] = { &dev_attr_machine.attr, &dev_attr_family.attr, + &dev_attr_serial_number.attr, &dev_attr_soc_id.attr, &dev_attr_revision.attr, NULL, |