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Commit 6ca72085 authored by Dan Williams's avatar Dan Williams
Browse files

nfit: export subsystem ids as attributes 



Similar to pci-sysfs export the subsystem information available in the
NFIT.  ACPI 6.1 clarifies that this data is copied as an array of bytes
from the DIMM SPD data.

Reported-by: default avatarRyon Jensen <ryon.jensen@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 30ec5fd4

drivers/acpi/nfit.c

+32 −1
Original line number Diff line number Diff line
@@ -847,6 +847,34 @@ static ssize_t format_show(struct device *dev, 
}

static DEVICE_ATTR_RO(format);



static ssize_t subsystem_vendor_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);



	return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_vendor_id));

}

static DEVICE_ATTR_RO(subsystem_vendor);



static ssize_t subsystem_rev_id_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);



	return sprintf(buf, "0x%04x\n",

			be16_to_cpu(dcr->subsystem_revision_id));

}

static DEVICE_ATTR_RO(subsystem_rev_id);



static ssize_t subsystem_device_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);



	return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_device_id));

}

static DEVICE_ATTR_RO(subsystem_device);



static ssize_t serial_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{
@@ -893,9 +921,12 @@ static struct attribute *acpi_nfit_dimm_attributes[] = { 
	&dev_attr_phys_id.attr,

	&dev_attr_vendor.attr,

	&dev_attr_device.attr,

	&dev_attr_rev_id.attr,

	&dev_attr_subsystem_vendor.attr,

	&dev_attr_subsystem_device.attr,

	&dev_attr_subsystem_rev_id.attr,

	&dev_attr_format.attr,

	&dev_attr_serial.attr,

	&dev_attr_rev_id.attr,

	&dev_attr_flags.attr,

	&dev_attr_id.attr,

	NULL,