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path: root/drivers/platform/chrome/cros_ec_vbc.c
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Diffstat (limited to 'drivers/platform/chrome/cros_ec_vbc.c')
-rw-r--r--drivers/platform/chrome/cros_ec_vbc.c59
1 files changed, 42 insertions, 17 deletions
diff --git a/drivers/platform/chrome/cros_ec_vbc.c b/drivers/platform/chrome/cros_ec_vbc.c
index 5356f26bc022..af9bfe6f385c 100644
--- a/drivers/platform/chrome/cros_ec_vbc.c
+++ b/drivers/platform/chrome/cros_ec_vbc.c
@@ -22,8 +22,11 @@
#include <linux/platform_device.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
+#include <linux/module.h>
#include <linux/slab.h>
+#define DRV_NAME "cros-ec-vbc"
+
static ssize_t vboot_context_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *att, char *buf,
loff_t pos, size_t count)
@@ -105,21 +108,6 @@ static ssize_t vboot_context_write(struct file *filp, struct kobject *kobj,
return data_sz;
}
-static umode_t cros_ec_vbc_is_visible(struct kobject *kobj,
- struct bin_attribute *a, int n)
-{
- struct device *dev = container_of(kobj, struct device, kobj);
- struct cros_ec_dev *ec = to_cros_ec_dev(dev);
- struct device_node *np = ec->ec_dev->dev->of_node;
-
- if (IS_ENABLED(CONFIG_OF) && np) {
- if (of_property_read_bool(np, "google,has-vbc-nvram"))
- return a->attr.mode;
- }
-
- return 0;
-}
-
static BIN_ATTR_RW(vboot_context, 16);
static struct bin_attribute *cros_ec_vbc_bin_attrs[] = {
@@ -130,6 +118,43 @@ static struct bin_attribute *cros_ec_vbc_bin_attrs[] = {
struct attribute_group cros_ec_vbc_attr_group = {
.name = "vbc",
.bin_attrs = cros_ec_vbc_bin_attrs,
- .is_bin_visible = cros_ec_vbc_is_visible,
};
-EXPORT_SYMBOL(cros_ec_vbc_attr_group);
+
+static int cros_ec_vbc_probe(struct platform_device *pd)
+{
+ struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
+ struct device *dev = &pd->dev;
+ int ret;
+
+ ret = sysfs_create_group(&ec_dev->class_dev.kobj,
+ &cros_ec_vbc_attr_group);
+ if (ret < 0)
+ dev_err(dev, "failed to create %s attributes. err=%d\n",
+ cros_ec_vbc_attr_group.name, ret);
+
+ return ret;
+}
+
+static int cros_ec_vbc_remove(struct platform_device *pd)
+{
+ struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
+
+ sysfs_remove_group(&ec_dev->class_dev.kobj,
+ &cros_ec_vbc_attr_group);
+
+ return 0;
+}
+
+static struct platform_driver cros_ec_vbc_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ },
+ .probe = cros_ec_vbc_probe,
+ .remove = cros_ec_vbc_remove,
+};
+
+module_platform_driver(cros_ec_vbc_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Expose the vboot context nvram to userspace");
+MODULE_ALIAS("platform:" DRV_NAME);