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From: Geert Uytterhoeven <geert+renesas@glider.be>
To: Marek Vasut <marek.vasut+renesas@gmail.com>,
	Lee Jones <lee.jones@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>
Cc: linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH v2 1/4] dt-bindings: mfd: bd9571mwv: Document DDR Backup Mode properties
Date: Wed, 14 Mar 2018 12:08:39 +0100	[thread overview]
Message-ID: <1521025722-24205-2-git-send-email-geert+renesas@glider.be> (raw)
In-Reply-To: <1521025722-24205-1-git-send-email-geert+renesas@glider.be>

Document the new optional properties related to DDR Backup Mode and
toggle/momentary power switches.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v2:
  - Improve property description,
  - Add properties for power switch type.
---
 Documentation/devicetree/bindings/mfd/bd9571mwv.txt | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/bd9571mwv.txt b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
index 9ab216a851d5619b..8804a214759845c5 100644
--- a/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
+++ b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
@@ -25,6 +25,25 @@ Required properties:
 			    Each child node is defined using the standard
 			    binding for regulators.
 
+Optional properties:
+  - rohm,ddr-backup-power : Value to use for DDR-Backup Power (default 0).
+			    This is a bitmask that specifies which DDR power
+			    rails need to be kept powered when backup mode is
+			    entered, for system suspend:
+			      - bit 0: DDR0
+			      - bit 1: DDR1
+			      - bit 2: DDR0C
+			      - bit 3: DDR1C
+			    These bits match the KEEPON_DDR* bits in the
+			    documentation for the "BKUP Mode Cnt" register.
+  - rohm,rstbmode-level: The RSTB signal is configured for level mode, to
+			 accommodate a toggle power switch (the RSTBMODE pin is
+			 strapped low).
+  - rohm,rstbmode-pulse: The RSTB signal is configured for pulse mode, to
+			 accommodate a momentary power switch (the RSTBMODE pin
+			 is strapped high).
+			 The two properties above are mutually exclusive.
+
 Example:
 
 	pmic: pmic@30 {
@@ -36,6 +55,8 @@ Example:
 		#interrupt-cells = <2>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		rohm,ddr-backup-power = <15>;
+		rohm,rstbmode-pulse;
 
 		regulators {
 			dvfs: dvfs {
-- 
2.7.4

  reply	other threads:[~2018-03-14 11:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-14 11:08 [PATCH v2 0/4] regulator: bd9571mwv: Add support for DDR backup mode Geert Uytterhoeven
2018-03-14 11:08 ` Geert Uytterhoeven [this message]
2018-03-18 12:49   ` [PATCH v2 1/4] dt-bindings: mfd: bd9571mwv: Document DDR Backup Mode properties Rob Herring
2018-03-27 12:15   ` Lee Jones
2018-03-14 11:08 ` [PATCH v2 2/4] mfd: bd9571mwv: Add DDR Backup Power register bit definitions Geert Uytterhoeven
2018-03-14 11:08 ` [PATCH v2 3/4] mfd: bd9571mwv: Allow DDR Backup Power register access Geert Uytterhoeven
2018-03-14 11:08 ` [PATCH v2 4/4] regulator: bd9571mwv: Add support for DDR backup mode Geert Uytterhoeven
2018-04-23 18:05   ` Applied "regulator: bd9571mwv: Add support for backup mode" to the regulator tree Mark Brown

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