From: Gatien Chevallier <gatien.chevallier@foss.st.com>
To: <Oleksii_Moisieiev@epam.com>, <gregkh@linuxfoundation.org>,
<herbert@gondor.apana.org.au>, <davem@davemloft.net>,
<robh+dt@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
<conor+dt@kernel.org>, <alexandre.torgue@foss.st.com>,
<vkoul@kernel.org>, <jic23@kernel.org>,
<olivier.moysan@foss.st.com>, <arnaud.pouliquen@foss.st.com>,
<mchehab@kernel.org>, <fabrice.gasnier@foss.st.com>,
<andi.shyti@kernel.org>, <ulf.hansson@linaro.org>,
<edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>,
<hugues.fruchet@foss.st.com>, <lee@kernel.org>, <will@kernel.org>,
<catalin.marinas@arm.com>, <arnd@kernel.org>,
<richardcochran@gmail.com>, Frank Rowand <frowand.list@gmail.com>,
<peng.fan@oss.nxp.com>
Cc: <linux-crypto@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <dmaengine@vger.kernel.org>,
<linux-i2c@vger.kernel.org>, <linux-iio@vger.kernel.org>,
<alsa-devel@alsa-project.org>, <linux-media@vger.kernel.org>,
<linux-mmc@vger.kernel.org>, <netdev@vger.kernel.org>,
<linux-phy@lists.infradead.org>, <linux-serial@vger.kernel.org>,
<linux-spi@vger.kernel.org>, <linux-usb@vger.kernel.org>,
Oleksii Moisieiev <oleksii_moisieiev@epam.com>,
Gatien Chevallier <gatien.chevallier@foss.st.com>
Subject: [PATCH v6 01/11] dt-bindings: document generic access controllers
Date: Tue, 10 Oct 2023 14:57:09 +0200 [thread overview]
Message-ID: <20231010125719.784627-2-gatien.chevallier@foss.st.com> (raw)
In-Reply-To: <20231010125719.784627-1-gatien.chevallier@foss.st.com>
From: Oleksii Moisieiev <Oleksii_Moisieiev@epam.com>
Introducing of the generic access controllers bindings for the
access controller provider and consumer devices. Those bindings are
intended to allow a better handling of accesses to resources in a
hardware architecture supporting several compartments.
This patch is based on [1]. It is integrated in this patchset as it
provides a use-case for it.
Diffs with [1]:
- Rename feature-domain* properties to access-control* to narrow
down the scope of the binding
- YAML errors and typos corrected.
- Example updated
- Some rephrasing in the binding description
[1]: https://lore.kernel.org/lkml/0c0a82bb-18ae-d057-562b
Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>
Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
---
Changes in V6:
- Renamed access-controller to access-controllers
- Example updated
- Removal of access-control-provider property
Changes in V5:
- Diffs with [1]
- Discarded the [IGNORE] tag as the patch is now part of the
patchset
.../access-controllers.yaml | 84 +++++++++++++++++++
1 file changed, 84 insertions(+)
create mode 100644 Documentation/devicetree/bindings/access-controllers/access-controllers.yaml
diff --git a/Documentation/devicetree/bindings/access-controllers/access-controllers.yaml b/Documentation/devicetree/bindings/access-controllers/access-controllers.yaml
new file mode 100644
index 000000000000..99e2865f0e46
--- /dev/null
+++ b/Documentation/devicetree/bindings/access-controllers/access-controllers.yaml
@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/access-controllers/access-controllers.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic Domain Access Controllers
+
+maintainers:
+ - Oleksii Moisieiev <oleksii_moisieiev@epam.com>
+
+description: |+
+ Common access controllers properties
+
+ Access controllers are in charge of stating which of the hardware blocks under
+ their responsibility (their domain) can be accesssed by which compartment. A
+ compartment can be a cluster of CPUs (or coprocessors), a range of addresses
+ or a group of hardware blocks. An access controller's domain is the set of
+ resources covered by the access controller.
+
+ This device tree binding can be used to bind devices to their access
+ controller provided by access-controllers property. In this case, the device
+ is a consumer and the access controller is the provider.
+
+ An access controller can be represented by any node in the device tree and
+ can provide one or more configuration parameters, needed to control parameters
+ of the consumer device. A consumer node can refer to the provider by phandle
+ and a set of phandle arguments, specified by '#access-controller-cells'
+ property in the access controller node.
+
+ Access controllers are typically used to set/read the permissions of a
+ hardware block and grant access to it. Any of which depends on the access
+ controller. The capabilities of each access controller are defined by the
+ binding of the access controller device.
+
+ Each node can be a consumer for the several access controllers.
+
+# always select the core schema
+select: true
+
+properties:
+ "#access-controller-cells":
+ description:
+ Number of cells in an access-controllers specifier;
+ Can be any value as specified by device tree binding documentation
+ of a particular provider. The node is an access controller.
+
+ access-controller-names:
+ $ref: /schemas/types.yaml#/definitions/string-array
+ description:
+ A list of access-controllers names, sorted in the same order as
+ access-controllers entries. Consumer drivers will use
+ access-controller-names to match with existing access-controllers entries.
+
+ access-controllers:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ description:
+ A list of access controller specifiers, as defined by the
+ bindings of the access-controllers provider.
+
+additionalProperties: true
+
+examples:
+ - |
+ clock_controller: access-controllers@50000 {
+ reg = <0x50000 0x400>;
+ #access-controller-cells = <2>;
+ };
+
+ bus_controller: bus@60000 {
+ reg = <0x60000 0x10000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+ #access-controller-cells = <3>;
+
+ uart4: serial@60100 {
+ reg = <0x60100 0x400>;
+ clocks = <&clk_serial>;
+ access-controllers = <&clock_controller 1 2>,
+ <&bus_controller 1 3 5>;
+ access-controller-names = "clock", "bus";
+ };
+ };
--
2.35.3
next prev parent reply other threads:[~2023-10-10 12:59 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-10 12:57 [PATCH v6 00/11] Introduce STM32 Firewall framework Gatien Chevallier
2023-10-10 12:57 ` Gatien Chevallier [this message]
2023-10-10 12:57 ` [PATCH v6 02/11] dt-bindings: treewide: add access-controllers description Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 03/11] dt-bindings: bus: document RIFSC Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 04/11] dt-bindings: bus: document ETZPC Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 05/11] firewall: introduce stm32_firewall framework Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 06/11] of: property: fw_devlink: Add support for "access-controller" Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 07/11] bus: rifsc: introduce RIFSC firewall controller driver Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 08/11] arm64: dts: st: add RIFSC as an access controller for STM32MP25x boards Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 09/11] bus: etzpc: introduce ETZPC firewall controller driver Gatien Chevallier
2023-10-10 12:57 ` [PATCH v6 10/11] ARM: dts: stm32: add ETZPC as a system bus for STM32MP15x boards Gatien Chevallier
2023-10-10 18:42 ` Rob Herring
2023-10-11 8:49 ` Gatien CHEVALLIER
2023-10-12 15:30 ` Rob Herring
2023-10-16 12:02 ` Gatien CHEVALLIER
2023-10-24 16:39 ` Rob Herring
2023-10-27 15:37 ` Gatien CHEVALLIER
2023-11-27 13:46 ` Gatien CHEVALLIER
2023-10-10 12:57 ` [PATCH v6 11/11] ARM: dts: stm32: add ETZPC as a system bus for STM32MP13x boards Gatien Chevallier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231010125719.784627-2-gatien.chevallier@foss.st.com \
--to=gatien.chevallier@foss.st.com \
--cc=Oleksii_Moisieiev@epam.com \
--cc=alexandre.torgue@foss.st.com \
--cc=alsa-devel@alsa-project.org \
--cc=andi.shyti@kernel.org \
--cc=arnaud.pouliquen@foss.st.com \
--cc=arnd@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=conor+dt@kernel.org \
--cc=davem@davemloft.net \
--cc=devicetree@vger.kernel.org \
--cc=dmaengine@vger.kernel.org \
--cc=edumazet@google.com \
--cc=fabrice.gasnier@foss.st.com \
--cc=frowand.list@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=herbert@gondor.apana.org.au \
--cc=hugues.fruchet@foss.st.com \
--cc=jic23@kernel.org \
--cc=krzysztof.kozlowski+dt@linaro.org \
--cc=kuba@kernel.org \
--cc=lee@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-iio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-mmc@vger.kernel.org \
--cc=linux-phy@lists.infradead.org \
--cc=linux-serial@vger.kernel.org \
--cc=linux-spi@vger.kernel.org \
--cc=linux-stm32@st-md-mailman.stormreply.com \
--cc=linux-usb@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=olivier.moysan@foss.st.com \
--cc=pabeni@redhat.com \
--cc=peng.fan@oss.nxp.com \
--cc=richardcochran@gmail.com \
--cc=robh+dt@kernel.org \
--cc=ulf.hansson@linaro.org \
--cc=vkoul@kernel.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).