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From: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
To: mazziesaccount@gmail.com, matti.vaittinen@fi.rohmeurope.com
Cc: Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>,
	Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-power@fi.rohmeurope.com, linux-arm-msm@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org
Subject: [RFC PATCH 1/7] dt_bindings: Add protection limit properties
Date: Thu, 11 Feb 2021 14:34:17 +0200	[thread overview]
Message-ID: <eacb8a0aad9190219b36763927602e9a566649c2.1613042245.git.matti.vaittinen@fi.rohmeurope.com> (raw)
In-Reply-To: <cover.1613042245.git.matti.vaittinen@fi.rohmeurope.com>

Support specifying protection/error/warning limits for regulator
over current, over temperature and over/under voltage.

Most of the PMICs support only "protection" feature but few
setups do also support error/warning level indications.

On many ICs most of the protection limits can't actually be set.
But for example the ampere limit for over-current protection on ROHM
BD9576 can be configured - or feature can be completely disabled.

Provide limit setting for all protections/errors for the sake of
the completeness and do that using own properties for all so that
not all users would need to set all levels when only one or few are
supported.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
---
 .../bindings/regulator/regulator.yaml         | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/regulator.yaml b/Documentation/devicetree/bindings/regulator/regulator.yaml
index 6d0bc9cd4040..47fff75f0554 100644
--- a/Documentation/devicetree/bindings/regulator/regulator.yaml
+++ b/Documentation/devicetree/bindings/regulator/regulator.yaml
@@ -117,6 +117,88 @@ properties:
     description: Enable over current protection.
     type: boolean
 
+  regulator-over-current-protection-microamp:
+    description: Set over current protection limit. This is a limit where
+      hardware performs emergency shutdown. Zero can be passed to disable
+      protection and value '1' indicates that protection should be enabled but
+      limit setting can be omitted.
+
+  regulator-over-current-error-microamp:
+    description: Set over current error limit. This is a limit where part of
+      the hardware propably is malfunctional and damage prevention is requested.
+      Zero can be passed to disable error detection and value '1' indicates
+      that detection should be enabled but limit setting can be omitted.
+
+  regulator-over-current-warn-microamp:
+    description: Set over current warning limit. This is a limit where hardware
+      is assumed still to be functional but approaching limit where it gets
+      damaged. Recovery actions should be initiated. Zero can be passed to
+      disable detection and value '1' indicates that detection should
+      be enabled but limit setting can be omitted.
+
+  regulator-over-voltage-protection-microvolt:
+    description: Set over voltage protection limit. This is a limit where
+      hardware performs emergency shutdown. Zero can be passed to disable
+      protection and value '1' indicates that protection should be enabled but
+      limit setting can be omitted. Limit is given as microvolt offset from
+      voltage set to regulator.
+
+  regulator-over-voltage-error-microvolt:
+    description: Set over voltage error limit. This is a limit where part of
+      the hardware propably is malfunctional and damage prevention is requested
+      Zero can be passed to disable error detection and value '1' indicates
+      that detection should be enabled but limit setting can be omitted. Limit
+      is given as microvolt offset from voltage set to regulator.
+
+  regulator-over-voltage-warn-microvolt:
+    description: Set over voltage warning limit. This is a limit where hardware
+      is assumed still to be functional but approaching limit where it gets
+      damaged. Recovery actions should be initiated. Zero can be passed to
+      disable detection and value '1' indicates that detection should
+      be enabled but limit setting can be omitted. Limit is given as microvolt
+      offset from voltage set to regulator.
+
+  regulator-under-voltage-protection-microvolt:
+    description: Set over under voltage protection limit. This is a limit where
+      hardware performs emergency shutdown. Zero can be passed to disable
+      protection and value '1' indicates that protection should be enabled but
+      limit setting can be omitted. Limit is given as microvolt offset from
+      voltage set to regulator.
+
+  regulator-under-voltage-error-microvolt:
+    description: Set under voltage error limit. This is a limit where part of
+      the hardware propably is malfunctional and damage prevention is requested
+      Zero can be passed to disable error detection and value '1' indicates
+      that detection should be enabled but limit setting can be omitted. Limit
+      is given as microvolt offset from voltage set to regulator.
+
+  regulator-under-voltage-warn-microvolt:
+    description: Set over under voltage warning limit. This is a limit where
+      hardware is assumed still to be functional but approaching limit where
+      it gets damaged. Recovery actions should be initiated. Zero can be passed
+      to disable detection and value '1' indicates that detection should
+      be enabled but limit setting can be omitted. Limit is given as microvolt
+      offset from voltage set to regulator.
+
+  regulator-over-temperature-protection-kelvin:
+    description: Set over temperature protection limit. This is a limit where
+      hardware performs emergency shutdown. Zero can be passed to disable
+      protection and value '1' indicates that protection should be enabled but
+      limit setting can be omitted.
+
+  regulator-over-temperature-error-kelvin:
+    description: Set over temperature error limit. This is a limit where part of
+      the hardware propably is malfunctional and damage prevention is requested
+      Zero can be passed to disable error detection and value '1' indicates
+      that detection should be enabled but limit setting can be omitted.
+
+  regulator-over-temperature-warn-kelvin:
+    description: Set over temperature warning limit. This is a limit where
+      hardware is assumed still to be functional but approaching limit where it
+      gets damaged. Recovery actions should be initiated. Zero can be passed to
+      disable detection and value '1' indicates that detection should
+      be enabled but limit setting can be omitted.
+
   regulator-active-discharge:
     description: |
       tristate, enable/disable active discharge of regulators. The values are:
-- 
2.25.4


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

  reply	other threads:[~2021-02-11 12:38 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-11 12:33 [RFC PATCH 0/7] Extend regulator notification support Matti Vaittinen
2021-02-11 12:34 ` Matti Vaittinen [this message]
2021-03-05 19:30   ` [RFC PATCH 1/7] dt_bindings: Add protection limit properties Rob Herring
2021-03-08  5:34     ` Vaittinen, Matti
2021-02-11 12:34 ` [RFC PATCH 2/7] regulator: add warning flags Matti Vaittinen
2021-02-11 12:35 ` [RFC PATCH 3/7] regulator: IRQ based event/error notification helpers Matti Vaittinen
2021-02-12  9:33   ` Vaittinen, Matti
2021-02-12 13:56     ` Mark Brown
2021-02-15 10:25   ` Vaittinen, Matti
2021-02-11 12:35 ` [RFC PATCH 4/7] regulator: add property parsing and callbacks to set protection limits Matti Vaittinen
2021-02-12  7:29   ` Matti Vaittinen
2021-02-11 12:35 ` [RFC PATCH 5/7] dt-bindings: regulator: bd9576 add FET ON-resistance for OCW Matti Vaittinen
2021-02-11 14:56   ` Rob Herring
2021-02-17 21:34   ` Rob Herring
2021-02-18  6:15     ` Vaittinen, Matti
2021-02-11 12:36 ` [RFC PATCH 6/7] regulator: bd9576: Support error reporting Matti Vaittinen
2021-02-11 12:36 ` [RFC PATCH 7/7] regulator: bd9576: Fix the driver name in id table Matti Vaittinen

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