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From: William Breathitt Gray <vilhelm.gray@gmail.com>
To: jic23@kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com, kernel@pengutronix.de,
	a.fatoum@pengutronix.de, kamel.bouhara@bootlin.com,
	gwendal@chromium.org, alexandre.belloni@bootlin.com,
	david@lechnology.com, linux-iio@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, syednwaris@gmail.com,
	patrick.havelange@essensium.com, fabrice.gasnier@st.com,
	mcoquelin.stm32@gmail.com, alexandre.torgue@st.com,
	o.rempel@pengutronix.de, jarkko.nikula@linux.intel.com,
	William Breathitt Gray <vilhelm.gray@gmail.com>,
	Dan Carpenter <dan.carpenter@oracle.com>
Subject: [PATCH v13 14/17] counter: Implement *_component_id sysfs attributes
Date: Tue, 13 Jul 2021 18:53:18 +0900	[thread overview]
Message-ID: <b018da44e8454bd4abffa6c214f20984e5311c1d.1626165765.git.vilhelm.gray@gmail.com> (raw)
In-Reply-To: <cover.1626165764.git.vilhelm.gray@gmail.com>

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>
---
 Documentation/ABI/testing/sysfs-bus-counter | 16 +++++++++-
 drivers/counter/counter-sysfs.c             | 33 +++++++++++++++++----
 2 files changed, 42 insertions(+), 7 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
index 9809d8a47431..e0e99adb0ecc 100644
--- a/Documentation/ABI/testing/sysfs-bus-counter
+++ b/Documentation/ABI/testing/sysfs-bus-counter
@@ -203,12 +203,26 @@ Description:
 		both edges:
 			Any state transition.
 
+What:		/sys/bus/counter/devices/counterX/countY/ceiling_component_id
+What:		/sys/bus/counter/devices/counterX/countY/floor_component_id
+What:		/sys/bus/counter/devices/counterX/countY/count_mode_component_id
+What:		/sys/bus/counter/devices/counterX/countY/direction_component_id
+What:		/sys/bus/counter/devices/counterX/countY/enable_component_id
+What:		/sys/bus/counter/devices/counterX/countY/error_noise_component_id
+What:		/sys/bus/counter/devices/counterX/countY/prescaler_component_id
+What:		/sys/bus/counter/devices/counterX/countY/preset_component_id
+What:		/sys/bus/counter/devices/counterX/countY/preset_enable_component_id
 What:		/sys/bus/counter/devices/counterX/countY/signalZ_action_component_id
+What:		/sys/bus/counter/devices/counterX/signalY/cable_fault_component_id
+What:		/sys/bus/counter/devices/counterX/signalY/cable_fault_enable_component_id
+What:		/sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler_component_id
+What:		/sys/bus/counter/devices/counterX/signalY/index_polarity_component_id
+What:		/sys/bus/counter/devices/counterX/signalY/synchronous_mode_component_id
 KernelVersion:	5.15
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Read-only attribute that indicates the component ID of the
-		respective Synapse of Count Y for Signal Z.
+		respective extension or Synapse.
 
 What:		/sys/bus/counter/devices/counterX/countY/spike_filter_ns
 KernelVersion:	5.14
diff --git a/drivers/counter/counter-sysfs.c b/drivers/counter/counter-sysfs.c
index 11bef9f8190f..df1d75e0d7b8 100644
--- a/drivers/counter/counter-sysfs.c
+++ b/drivers/counter/counter-sysfs.c
@@ -588,6 +588,7 @@ 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;
@@ -603,8 +604,14 @@ 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;
 	}
@@ -695,6 +702,7 @@ 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;
@@ -719,8 +727,14 @@ 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;
 	}
@@ -784,6 +798,7 @@ 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);
@@ -816,8 +831,14 @@ 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;
 	}
-- 
2.32.0


  parent reply	other threads:[~2021-07-13  9:55 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-13  9:53 [PATCH v13 00/17] Introduce the Counter character device interface William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 01/17] counter: 104-quad-8: Return error when invalid mode during ceiling_write William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 02/17] counter: Return error code on invalid modes William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 03/17] counter: Standardize to ERANGE for limit exceeded errors William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 04/17] counter: Rename counter_signal_value to counter_signal_level William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 05/17] counter: Rename counter_count_function to counter_function William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 06/17] counter: Internalize sysfs interface code William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 07/17] counter: Update counter.h comments to reflect sysfs internalization William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 08/17] docs: counter: Update " William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 09/17] counter: Move counter enums to uapi header William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 10/17] counter: Add character device interface William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 11/17] docs: counter: Document " William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 12/17] tools/counter: Create Counter tools William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 13/17] counter: Implement signalZ_action_component_id sysfs attribute William Breathitt Gray
2021-07-13  9:53 ` William Breathitt Gray [this message]
2021-07-13  9:53 ` [PATCH v13 15/17] counter: Implement events_queue_size " William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 16/17] counter: 104-quad-8: Replace mutex with spinlock William Breathitt Gray
2021-07-13  9:53 ` [PATCH v13 17/17] counter: 104-quad-8: Add IRQ support for the ACCES 104-QUAD-8 William Breathitt Gray
2021-07-28  8:51 ` [PATCH v13 00/17] Introduce the Counter character device interface William Breathitt Gray
2021-07-29  9:48   ` William Breathitt Gray

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