[RFC 2/2] dt-bindings: mmc: sdhci-msm: Add Bus BW vote supported strings

Pradeep P V K
2019-09-06T12:54:31Z

Add Bus bandwidth voting supported strings for qcom-sdhci controller.

Signed-off-by: Pradeep P V K <ppvk@codeaurora.org>
---
.../devicetree/bindings/mmc/sdhci-msm.txt | 32 ++++++++++++++++++++++
1 file changed, 32 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index da4edb1..8255d92 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -39,6 +39,25 @@ Required properties:
"cal" - reference clock for RCLK delay calibration (optional)
"sleep" - sleep clock for RCLK delay calibration (optional)

+Optional Properties:
+* Following bus parameters are required for bus bw voting:
+- interconnects: Pairs of phandles and interconnect provider specifier
+ to denote the edge source and destination ports of
+ the interconnect path. Please refer to
+ Documentation/devicetree/bindings/interconnect/
+ for more details.
+- interconnect-names: List of interconnect path name strings sorted in the same
+ order as the interconnects property. Consumers drivers will use
+ interconnect-names to match interconnect paths with interconnect
+ specifiers. Please refer to Documentation/devicetree/bindings/
+ interconnect/ for more details.
+- qcom,msm-bus,name: string describing the bus path
+- qcom,msm-bus,num-cases: number of configurations in which sdhc can operate in
+- qcom,msm-bus,num-paths: number of paths to vote for
+- qcom,msm-bus,vectors-KBps: Takes a tuple <ib ab>, <ib ab> (2 tuples for 2
+ num-paths) The number of these entries *must*
+ be same as num-cases.
+
Example:

sdhc_1: sdhci@f9824900 {
@@ -56,6 +75,19 @@ Example:

clocks = <&gcc GCC_SDCC1_APPS_CLK>, <&gcc GCC_SDCC1_AHB_CLK>;
clock-names = "core", "iface";
+ interconnects = <&qnoc 50 &qnoc 512>,
+ <&qnoc 1 &qnoc 544>;
+ interconnect-names = "sdhc-ddr","cpu-sdhc";
+ qcom,msm-bus,name = "sdhc1";
+ qcom,msm-bus,num-cases = <3>;
+ qcom,msm-bus,num-paths = <2>;
+ qcom,msm-bus,vectors-KBps =
+ /* No Vote */
+ <0 0>, <0 0>,
+ /* 50 MB/s */
+ <130718 200000>, <133320 133320>,
+ /* 200 MB/s */
+ <1338562 4096000>, <1338562 4096000>;
};

sdhc_2: sdhci@f98a4900 {
--
1.9.1