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| author | William Breathitt Gray <vilhelm.gray@gmail.com> | 2021-09-29 05:16:03 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-10-17 11:54:48 +0200 |
| commit | 4bdec61d927b5db25f75fa377504d4e127c3682b (patch) | |
| tree | b70d819dcd8990dd9ba721e36746ae9e94a03cd0 /drivers/counter | |
| parent | counter: Implement signalZ_action_component_id sysfs attribute (diff) | |
| download | linux-4bdec61d927b5db25f75fa377504d4e127c3682b.tar.xz linux-4bdec61d927b5db25f75fa377504d4e127c3682b.zip | |
counter: Implement *_component_id sysfs attributes
The Generic Counter chrdev interface expects users to supply component
IDs in order to select extensions for requests. In order for users to
know what component ID belongs to which extension this information must
be exposed. The *_component_id attribute provides a way for users to
discover what component ID belongs to which respective extension.
Cc: David Lechner <david@lechnology.com>
Cc: Gwendal Grignou <gwendal@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/8961a11edbb882fc689e468194f5be75f572443e.1632884256.git.vilhelm.gray@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/counter')
| -rw-r--r-- | drivers/counter/counter-sysfs.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/drivers/counter/counter-sysfs.c b/drivers/counter/counter-sysfs.c index ee7ff1cde454..97d8d7c2a2b6 100644 --- a/drivers/counter/counter-sysfs.c +++ b/drivers/counter/counter-sysfs.c @@ -586,6 +586,7 @@ static int counter_signal_attrs_create(struct counter_device *const counter, int err; struct counter_comp comp; size_t i; + struct counter_comp *ext; /* Create main Signal attribute */ comp = counter_signal_comp; @@ -601,8 +602,14 @@ static int counter_signal_attrs_create(struct counter_device *const counter, /* Create an attribute for each extension */ for (i = 0; i < signal->num_ext; i++) { - err = counter_attr_create(dev, cattr_group, signal->ext + i, - scope, signal); + ext = &signal->ext[i]; + + err = counter_attr_create(dev, cattr_group, ext, scope, signal); + if (err < 0) + return err; + + err = counter_comp_id_attr_create(dev, cattr_group, ext->name, + i); if (err < 0) return err; } @@ -693,6 +700,7 @@ static int counter_count_attrs_create(struct counter_device *const counter, int err; struct counter_comp comp; size_t i; + struct counter_comp *ext; /* Create main Count attribute */ comp = counter_count_comp; @@ -717,8 +725,14 @@ static int counter_count_attrs_create(struct counter_device *const counter, /* Create an attribute for each extension */ for (i = 0; i < count->num_ext; i++) { - err = counter_attr_create(dev, cattr_group, count->ext + i, - scope, count); + ext = &count->ext[i]; + + err = counter_attr_create(dev, cattr_group, ext, scope, count); + if (err < 0) + return err; + + err = counter_comp_id_attr_create(dev, cattr_group, ext->name, + i); if (err < 0) return err; } @@ -782,6 +796,7 @@ static int counter_sysfs_attr_add(struct counter_device *const counter, struct device *const dev = &counter->dev; int err; size_t i; + struct counter_comp *ext; /* Add Signals sysfs attributes */ err = counter_sysfs_signals_add(counter, cattr_group); @@ -814,8 +829,14 @@ static int counter_sysfs_attr_add(struct counter_device *const counter, /* Create an attribute for each extension */ for (i = 0; i < counter->num_ext; i++) { - err = counter_attr_create(dev, cattr_group, counter->ext + i, - scope, NULL); + ext = &counter->ext[i]; + + err = counter_attr_create(dev, cattr_group, ext, scope, NULL); + if (err < 0) + return err; + + err = counter_comp_id_attr_create(dev, cattr_group, ext->name, + i); if (err < 0) return err; } |