[RFC,v3,2/2] dt-bindings: mmc: sdhci-msm: Add interconnect BW scaling strings
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Message ID 1581086695-16645-3-git-send-email-ppvk@codeaurora.org
State Superseded
Headers show
Series
  • Add SDHC interconnect bandwidth scaling
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Commit Message

Pradeep P V K Feb. 7, 2020, 2:44 p.m. UTC
Add interconnect bandwidth scaling supported strings for qcom-sdhci
controller.

changes from RFC v2 -> v3:
- Addressed review comments on v2.
- Modified interconnect bandwidth support using OPP framework.

Signed-off-by: Pradeep P V K <ppvk@codeaurora.org>
---
 Documentation/devicetree/bindings/mmc/sdhci-msm.txt | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index 7ee639b..cbe97b8 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -40,6 +40,21 @@  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 interconnect bandwidth scaling:
+- interconnects: Pairs of phandles and interconnect provider specifier
+		 to denote the edge source and destination ports of
+		 the interconnect path.
+
+- interconnect-names: For sdhc, we have two main paths.
+		1. Data path : sdhc to ddr
+		2. Config path : cpu to sdhc
+		For Data interconnect path the name supposed to be
+		is "sdhc-ddr" and for config interconnect path it is
+		"cpu-sdhc".
+		Please refer to Documentation/devicetree/bindings/
+		interconnect/ for more details.
+
 Example:
 
 	sdhc_1: sdhci@f9824900 {
@@ -57,6 +72,9 @@  Example:
 
 		clocks = <&gcc GCC_SDCC1_APPS_CLK>, <&gcc GCC_SDCC1_AHB_CLK>;
 		clock-names = "core", "iface";
+		interconnects = <&qnoc MASTER_SDCC_ID &qnoc SLAVE_DDR_ID>,
+				<&qnoc MASTER_CPU_ID &qnoc SLAVE_SDCC_ID>;
+		interconnect-names = "sdhc-ddr","cpu-sdhc";
 	};
 
 	sdhc_2: sdhci@f98a4900 {