lkml.org 
[lkml]   [2023]   [Jan]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v9 06/15] dt-bindings: mfd: amd,pensando-elbasr: Add AMD Pensando System Resource chip
Date
Add support for the AMD Pensando SoC System Resource chip using the
SPI interface. The device functions are accessed using four
chip-selects. This device is present for all Pensando SoC designs.

Signed-off-by: Brad Larson <blarson@amd.com>
---

Changes since v6:
- Instead of four nodes, one per chip-select, a single
node is used with reset-cells in the parent.
- No MFD API is used anymore in the driver so it made
sense to move this to drivers/spi.
- This driver is common for all Pensando SoC based designs
so changed the name to pensando-sr.c to not make it Elba
SoC specific.
- Added property cs for the chip-select number which is used
by the driver to create /dev/pensr0.<cs>

---
.../bindings/spi/amd,pensando-sr.yaml | 68 +++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml

diff --git a/Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml b/Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml
new file mode 100644
index 000000000000..8504652f6e19
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/amd,pensando-sr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AMD Pensando SoC Resource Controller
+
+description: |
+ AMD Pensando SoC Resource Controller is a set of
+ control/status registers accessed on four chip-selects.
+ This device is present in all Pensando SoC based designs.
+
+maintainers:
+ - Brad Larson <blarson@amd.com>
+
+properties:
+ compatible:
+ contains:
+ enum:
+ - amd,pensando-sr
+
+ reg:
+ minItems: 1
+
+ cs:
+ minItems: 1
+ maxItems: 4
+ description:
+ Device chip select
+
+ '#reset-cells':
+ const: 1
+
+ interrupts:
+ maxItems: 1
+
+ spi-max-frequency: true
+
+required:
+ - compatible
+ - cs
+ - spi-max-frequency
+ - '#reset-cells'
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ num-cs = <4>;
+
+ system-controller@0 {
+ compatible = "amd,pensando-sr";
+ reg = <0>;
+ cs = <0 1 2 3>;
+ spi-max-frequency = <12000000>;
+ interrupt-parent = <&porta>;
+ interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+ #reset-cells = <1>;
+ };
+ };
+
+...
--
2.17.1
\
 
 \ /
  Last update: 2023-03-26 23:47    [W:1.037 / U:2.888 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site