linux-kernel - [PATCH 4/8] docs: counter: add unit timer sysfs attributes

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Message-Id: <20211017013343.3385923-5-david@lechnology.com>
Date:   Sat, 16 Oct 2021 20:33:39 -0500
From:   David Lechner <david@...hnology.com>
To:     linux-iio@...r.kernel.org
Cc:     David Lechner <david@...hnology.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Robert Nelson <robertcnelson@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/8] docs: counter: add unit timer sysfs attributes

This documents new unit timer sysfs attributes for the counter
subsystem.

Signed-off-by: David Lechner <david@...hnology.com>
---
 Documentation/ABI/testing/sysfs-bus-counter | 24 +++++++++++++++++++++
 drivers/counter/ti-eqep.c                   |  2 +-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
index 06c2b3e27e0b..37d960a8cb1b 100644
--- a/Documentation/ABI/testing/sysfs-bus-counter
+++ b/Documentation/ABI/testing/sysfs-bus-counter
@@ -218,6 +218,9 @@ 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
+What:		/sys/bus/counter/devices/unit_timer_enable_component_id
+What:		/sys/bus/counter/devices/unit_timer_period_component_id
+What:		/sys/bus/counter/devices/unit_timer_time_component_id
 KernelVersion:	5.16
 Contact:	linux-iio@...r.kernel.org
 Description:
@@ -345,3 +348,24 @@ Description:
 			via index_polarity. The index function (as enabled via
 			preset_enable) is performed synchronously with the
 			quadrature clock on the active level of the index input.
+
+What:		/sys/bus/counter/devices/unit_timer_enable
+KernelVersion:	5.16
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Read/write attribute that starts or stops the unit timer. Valid
+		values are boolean.
+
+What:		/sys/bus/counter/devices/unit_timer_period
+KernelVersion:	5.16
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Read/write attribute that selects the unit timer timeout in
+		nanoseconds.
+
+What:		/sys/bus/counter/devices/unit_timer_time
+KernelVersion:	5.16
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Read/write attribute that indicates the current time of the
+		unit timer in nanoseconds.
diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c
index a4a5a4486329..1ba7f3c7cb7e 100644
--- a/drivers/counter/ti-eqep.c
+++ b/drivers/counter/ti-eqep.c
@@ -680,7 +680,7 @@ static int ti_eqep_probe(struct platform_device *pdev)
 	pm_runtime_get_sync(dev);
 
 	/*
-	 * We can end up with an interupt infinite loop (interrupts triggered
+	 * We can end up with an interrupt infinite loop (interrupts triggered
 	 * as soon as they are cleared) if we leave these at the default value
 	 * of 0 and events are enabled.
 	 */
-- 
2.25.1