linux-kernel - [PATCH 07/11] dt-bindings: wkup_m3

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Date:   Sat, 19 Feb 2022 13:53:24 -0800
From:   Drew Fustini <dfustini@...libre.com>
To:     Benoît Cousson <bcousson@...libre.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Dave Gerlach <d-gerlach@...com>, devicetree@...r.kernel.org,
        Drew Fustini <dfustini@...libre.com>,
        Keerthy <j-keerthy@...com>, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-remoteproc@...r.kernel.org,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Nishanth Menon <nm@...com>, Rob Herring <robh+dt@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Tony Lindgren <tony@...mide.com>, s-anna@...com,
        khilman@...libre.com
Subject: [PATCH 07/11] dt-bindings: wkup_m3_ipc: Add scale-data-fw property

From: Dave Gerlach <d-gerlach@...com>

Add documentation for scale-data-fw property on the wkup_m3_ipc node to
enable I2C PMIC voltage scaling. The property contains the name of a
binary file for the CM3 firmware to load.

Based on previous work by Russ Dill.

Signed-off-by: Dave Gerlach <d-gerlach@...com>
Signed-off-by: Keerthy <j-keerthy@...com>
[dfustini: split dt-binding change into separate patch]
Signed-off-by: Drew Fustini <dfustini@...libre.com>
---
 .../devicetree/bindings/soc/ti/wkup_m3_ipc.txt        | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt b/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt
index df6b600abf4c..01b78a9da943 100644
--- a/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt
+++ b/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt
@@ -56,6 +56,17 @@ Example:
 		};
 	};
 
+Support for I2C PMIC Voltage Scaling
+--------------------
+It is possible to pass the name of a binary file to laod to the CM3 firmware
+in order to provide I2C sequences for the CM3 to send out to the PMIC during
+low power mode entry.
+
+Optional properties:
+--------------------
+- scale-data-fw:	Name of the firmware binary in /lib/firmware to copy to m3
+			aux data.
+
 Support for VTT Toggle
 ==================================
 In order to enable the support for VTT toggle during Suspend/Resume
-- 
2.32.0