diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/303-core-0002-drivers-base-add-sysfs-entries-for-suppliers-and-con.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/303-core-0002-drivers-base-add-sysfs-entries-for-suppliers-and-con.patch | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/target/linux/layerscape/patches-5.4/303-core-0002-drivers-base-add-sysfs-entries-for-suppliers-and-con.patch b/target/linux/layerscape/patches-5.4/303-core-0002-drivers-base-add-sysfs-entries-for-suppliers-and-con.patch deleted file mode 100644 index 4cad5e2d13..0000000000 --- a/target/linux/layerscape/patches-5.4/303-core-0002-drivers-base-add-sysfs-entries-for-suppliers-and-con.patch +++ /dev/null @@ -1,99 +0,0 @@ -From 4a84eacedc55e78c8f64a5a4f9ade6e285844b85 Mon Sep 17 00:00:00 2001 -From: Ioana Ciornei <ioana.ciornei@nxp.com> -Date: Mon, 25 Jun 2018 13:19:53 +0300 -Subject: [PATCH] drivers/base: add sysfs entries for suppliers and consumers - -Instead of scraping dmesg for messages such as 'Linked as a consumer to' -or 'Dropping the link to' export two new sysfs entries in the device -folder that list the consumer and supplier devices. - -Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> ---- - Documentation/ABI/testing/sysfs-devices-links | 13 +++++++++ - drivers/base/core.c | 42 +++++++++++++++++++++++++++ - 2 files changed, 55 insertions(+) - create mode 100644 Documentation/ABI/testing/sysfs-devices-links - ---- /dev/null -+++ b/Documentation/ABI/testing/sysfs-devices-links -@@ -0,0 +1,13 @@ -+What: /sys/devices/.../consumers -+Date: October 2018 -+Contact: Ioana Ciornei <ioana.ciornei@nxp.com> -+Description: -+ Read-only attribute that lists the current "consumers" of -+ a specific device. -+ -+What: /sys/devices/.../suppliers -+Date: October 2018 -+Contact: Ioana Ciornei <ioana.ciornei@nxp.com> -+Description: -+ Read-only attribute that lists the current "suppliers" of -+ a specific device. ---- a/drivers/base/core.c -+++ b/drivers/base/core.c -@@ -1333,6 +1333,34 @@ static ssize_t online_store(struct devic - } - static DEVICE_ATTR_RW(online); - -+static ssize_t suppliers_show(struct device *dev, struct device_attribute *attr, -+ char *buf) -+{ -+ struct device_link *link; -+ size_t count = 0; -+ -+ list_for_each_entry(link, &dev->links.suppliers, c_node) -+ count += scnprintf(buf + count, PAGE_SIZE - count, "%s\n", -+ dev_name(link->supplier)); -+ -+ return count; -+} -+static DEVICE_ATTR_RO(suppliers); -+ -+static ssize_t consumers_show(struct device *dev, struct device_attribute *attr, -+ char *buf) -+{ -+ struct device_link *link; -+ size_t count = 0; -+ -+ list_for_each_entry(link, &dev->links.consumers, s_node) -+ count += scnprintf(buf + count, PAGE_SIZE - count, "%s\n", -+ dev_name(link->consumer)); -+ -+ return count; -+} -+static DEVICE_ATTR_RO(consumers); -+ - int device_add_groups(struct device *dev, const struct attribute_group **groups) - { - return sysfs_create_groups(&dev->kobj, groups); -@@ -1504,8 +1532,20 @@ static int device_add_attrs(struct devic - goto err_remove_dev_groups; - } - -+ error = device_create_file(dev, &dev_attr_suppliers); -+ if (error) -+ goto err_remove_online; -+ -+ error = device_create_file(dev, &dev_attr_consumers); -+ if (error) -+ goto err_remove_suppliers; -+ - return 0; - -+ err_remove_suppliers: -+ device_remove_file(dev, &dev_attr_suppliers); -+ err_remove_online: -+ device_remove_file(dev, &dev_attr_online); - err_remove_dev_groups: - device_remove_groups(dev, dev->groups); - err_remove_type_groups: -@@ -1523,6 +1563,8 @@ static void device_remove_attrs(struct d - struct class *class = dev->class; - const struct device_type *type = dev->type; - -+ device_remove_file(dev, &dev_attr_consumers); -+ device_remove_file(dev, &dev_attr_suppliers); - device_remove_file(dev, &dev_attr_online); - device_remove_groups(dev, dev->groups); - |