From: boris.brezillon@free-electrons.com (Boris Brezillon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 14/14] regulator: pwm: Document pwm-dutycycle-unit and pwm-dutycycle-range
Date: Tue, 14 Jun 2016 11:13:22 +0200 [thread overview]
Message-ID: <1465895602-31008-15-git-send-email-boris.brezillon@free-electrons.com> (raw)
In-Reply-To: <1465895602-31008-1-git-send-email-boris.brezillon@free-electrons.com>
Document the pwm-dutycycle-unit and pwm-dutycycle-range properties.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Brian Norris <briannorris@chromium.org>
---
.../devicetree/bindings/regulator/pwm-regulator.txt | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt
index ed936f0..9fbc7b1 100644
--- a/Documentation/devicetree/bindings/regulator/pwm-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/pwm-regulator.txt
@@ -34,6 +34,18 @@ Only required for Voltage Table Mode:
First cell is voltage in microvolts (uV)
Second cell is duty-cycle in percent (%)
+Optional properties for Continuous mode:
+- pwm-dutycycle-unit: Integer value encoding the duty cycle unit. If not
+ defined, <100> is assumed, meaning that
+ pwm-dutycycle-range contains values expressed in
+ percent.
+
+- pwm-dutycycle-range: Should contain 2 entries. The first entry is encoding
+ the dutycycle for regulator-min-microvolt and the
+ second one the dutycycle for regulator-max-microvolt.
+ Duty cycle values are expressed in pwm-dutycycle-unit.
+ If not defined, <0 100> is assumed.
+
NB: To be clear, if voltage-table is provided, then the device will be used
in Voltage Table Mode. If no voltage-table is provided, then the device will
be used in Continuous Voltage Mode.
@@ -48,6 +60,13 @@ Continuous Voltage Example:
regulator-min-microvolt = <1016000>;
regulator-max-microvolt = <1114000>;
regulator-name = "vdd_logic";
+ /* unit == per-mille */
+ pwm-dutycycle-unit = <1000>;
+ /*
+ * Inverted PWM logic, and the duty cycle range is limited
+ * to 30%-70%.
+ */
+ pwm-dutycycle-range <700 300>; /* */
};
Voltage Table Example:
--
2.7.4
next prev parent reply other threads:[~2016-06-14 9:13 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-14 9:13 [PATCH v3 00/14] regulator: pwm: various improvements Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 01/14] pwm: Add an helper to prepare a new PWM state Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 02/14] pwm: Add two helpers to ease relative duty cycle manipulation Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 03/14] pwm: rockchip: Fix period and duty_cycle approximation Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 04/14] pwm: rockchip: Add support for hardware readout Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 05/14] pwm: rockchip: Avoid glitches on already running PWMs Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 06/14] pwm: rockchip: Add support for atomic update Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 07/14] pwm: sti: Add support for hardware readout Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 08/14] pwm: sti: Avoid glitches on already running PWMs Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 09/14] regulator: pwm: Adjust PWM config at probe time Boris Brezillon
2016-06-14 9:13 ` [PATCH v3 10/14] regulator: pwm: Switch to the atomic PWM API Boris Brezillon
2016-07-05 14:30 ` Mark Brown
2016-06-14 9:13 ` [PATCH v3 11/14] regulator: pwm: Properly initialize the ->state field Boris Brezillon
2016-07-05 14:31 ` Mark Brown
2016-06-14 9:13 ` [PATCH v3 12/14] regulator: pwm: Retrieve correct voltage Boris Brezillon
2016-07-05 14:32 ` Mark Brown
2016-07-08 15:43 ` Thierry Reding
2016-07-09 9:47 ` Mark Brown
2016-07-11 7:02 ` Thierry Reding
2016-07-11 7:20 ` Boris Brezillon
2016-07-11 16:53 ` Doug Anderson
2016-06-14 9:13 ` [PATCH v3 13/14] regulator: pwm: Support extra continuous mode cases Boris Brezillon
2016-07-05 14:34 ` Mark Brown
2016-06-14 9:13 ` Boris Brezillon [this message]
2016-06-16 22:26 ` [PATCH v3 14/14] regulator: pwm: Document pwm-dutycycle-unit and pwm-dutycycle-range Rob Herring
2016-07-05 14:36 ` Mark Brown
2016-07-08 16:35 ` [PATCH v3 00/14] regulator: pwm: various improvements Thierry Reding
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