[PATCH v1 2/3] dt-bindings: soc: samsung: usi: add USIv1 and samsung,exynos8895-usi

[Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>]

Add constants for choosing USIv1 configuration mode in device tree.
Those are further used in the USI driver to figure out which value to
write into SW_CONF register. Modify the current USI IP-core
bindings to include information about USIv1 and a compatible for
exynos8895.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
---
 .../bindings/soc/samsung/exynos-usi.yaml      | 22 ++++++++++++++-----
 include/dt-bindings/soc/samsung,exynos-usi.h  |  8 +++++++
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml b/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
index f80fcbc31..50db63a8a 100644
--- a/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
+++ b/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
@@ -11,11 +11,21 @@ maintainers:
   - Krzysztof Kozlowski <krzk@kernel.org>
 
 description: |
-  USI IP-core provides selectable serial protocol (UART, SPI or High-Speed I2C).
-  USI shares almost all internal circuits within each protocol, so only one
-  protocol can be chosen at a time. USI is modeled as a node with zero or more
-  child nodes, each representing a serial sub-node device. The mode setting
-  selects which particular function will be used.
+  The USI IP-core provides configurable support for serial protocols, enabling
+  different serial communication modes depending on the version.
+
+  In USIv1, configurations are available to enable either one or two protocols
+  simultaneously in select combinations - High-Speed I2C0, High-Speed
+  I2C1, SPI, UART, High-Speed I2C0 and I2C1 or both High-Speed
+  I2C1 and UART.
+
+  In USIv2, only one protocol can be active at a time, either UART, SPI, or
+  High-Speed I2C.
+
+  The USI core shares internal circuits across protocols, meaning only the
+  selected configuration is active at any given time. USI is modeled as a node
+  with zero or more child nodes, each representing a serial sub-node device. The
+  mode setting selects which particular function will be used.
 
 properties:
   $nodename:
@@ -31,6 +41,7 @@ properties:
           - const: samsung,exynos850-usi
       - enum:
           - samsung,exynos850-usi
+          - samsung,exynos8895-usi
 
   reg:
     maxItems: 1
@@ -106,6 +117,7 @@ if:
       contains:
         enum:
           - samsung,exynos850-usi
+          - samsung,exynos8895-usi
 
 then:
   properties:
diff --git a/include/dt-bindings/soc/samsung,exynos-usi.h b/include/dt-bindings/soc/samsung,exynos-usi.h
index a01af169d..5fbeb426b 100644
--- a/include/dt-bindings/soc/samsung,exynos-usi.h
+++ b/include/dt-bindings/soc/samsung,exynos-usi.h
@@ -9,6 +9,14 @@
 #ifndef __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H
 #define __DT_BINDINGS_SAMSUNG_EXYNOS_USI_H
 
+#define USI_V1_NONE		0
+#define USI_V1_I2C0		1
+#define USI_V1_I2C1		2
+#define USI_V1_I2C0_1		3
+#define USI_V1_SPI		4
+#define USI_V1_UART		5
+#define USI_V1_UART_I2C1	6
+
 #define USI_V2_NONE		0
 #define USI_V2_UART		1
 #define USI_V2_SPI		2
-- 
2.43.0