linux-kernel - [PATCH 1/1] dt-bindings: i3c: add header for generic I3C flags

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Message-Id: <20240712170640.3635096-1-Frank.Li@nxp.com>
Date: Fri, 12 Jul 2024 13:06:39 -0400
From: Frank Li <Frank.Li@....com>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	linux-i3c@...ts.infradead.org (moderated list:I3C SUBSYSTEM),
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH 1/1] dt-bindings: i3c: add header for generic I3C flags

From: Carlos Song <carlos.song@....com>

Add header file for generic I3C flags to avoid hard code in dts file.

Signed-off-by: Carlos Song <carlos.song@....com>
Reviewed-by: Frank Li <frank.li@....com>
Acked-by: Jason Liu <jason.hui.liu@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
 Documentation/devicetree/bindings/i3c/i3c.yaml |  5 ++++-
 MAINTAINERS                                    |  1 +
 include/dt-bindings/i3c/i3c.h                  | 16 ++++++++++++++++
 3 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 include/dt-bindings/i3c/i3c.h

diff --git a/Documentation/devicetree/bindings/i3c/i3c.yaml b/Documentation/devicetree/bindings/i3c/i3c.yaml
index 113957ebe9f1d..90f3610725185 100644
--- a/Documentation/devicetree/bindings/i3c/i3c.yaml
+++ b/Documentation/devicetree/bindings/i3c/i3c.yaml
@@ -91,6 +91,7 @@ patternProperties:
               - const: 0
               - description: |
                   Shall encode the I3C LVR (Legacy Virtual Register):
+                  See dt-bindings/i3c/i3c.h
                     bit[31:8]: unused/ignored
                     bit[7:5]: I2C device index. Possible values:
                       * 0: I2C device has a 50 ns spike filter
@@ -153,6 +154,8 @@ additionalProperties: true
 
 examples:
   - |
+    #include <dt-bindings/i3c/i3c.h>
+
     i3c@...0000 {
         compatible = "cdns,i3c-master";
         clocks = <&coreclock>, <&i3csysclock>;
@@ -166,7 +169,7 @@ examples:
         /* I2C device. */
         eeprom@57 {
             compatible = "atmel,24c01";
-            reg = <0x57 0x0 0x10>;
+            reg = <0x57 0x0 (I2C_FM | I2C_FILTER)>;
             pagesize = <0x8>;
         };
 
diff --git a/MAINTAINERS b/MAINTAINERS
index 3c4fdf74a3f9d..f0ce22e04d467 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10479,6 +10479,7 @@ F:	Documentation/ABI/testing/sysfs-bus-i3c
 F:	Documentation/devicetree/bindings/i3c/
 F:	Documentation/driver-api/i3c
 F:	drivers/i3c/
+F:	include/dt-bindings/i3c/
 F:	include/linux/i3c/
 
 IBM Operation Panel Input Driver
diff --git a/include/dt-bindings/i3c/i3c.h b/include/dt-bindings/i3c/i3c.h
new file mode 100644
index 0000000000000..2513947e70cd2
--- /dev/null
+++ b/include/dt-bindings/i3c/i3c.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+/*
+ * Copyright 2024 NXP
+ */
+
+#ifndef _DT_BINDINGS_I3C_I3C_H
+#define _DT_BINDINGS_I3C_I3C_H
+
+#define I2C_FM      (1 << 4)
+#define I2C_FM_PLUS (0 << 4)
+
+#define I2C_FILTER  (0 << 5)
+#define I2C_NO_FILTER_HIGH_FREQUENCY    (1 << 5)
+#define I2C_NO_FILTER_LOW_FREQUENCY     (2 << 5)
+
+#endif
-- 
2.34.1