openwrt/target/linux/ipq806x/patches-5.15/0001-dtbindings-qcom_adm-Fix-channel-specifiers.patch

From 28d0ed88f536dd639adf1b0c7c08e04be3c8f294 Mon Sep 17 00:00:00 2001
From: Thomas Pedersen <[email protected]>
Date: Mon, 16 May 2016 17:58:50 -0700
Subject: [PATCH 01/69] dtbindings: qcom_adm: Fix channel specifiers

Original patch from Andy Gross.

This patch removes the crci information from the dma
channel property.  At least one client device requires
using more than one CRCI value for a channel.  This does
not match the current binding and the crci information
needs to be removed.

Instead, the client device will provide this information
via other means.

Signed-off-by: Andy Gross <[email protected]>
Signed-off-by: Thomas Pedersen <[email protected]>
---
 Documentation/devicetree/bindings/dma/qcom_adm.txt | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

--- a/Documentation/devicetree/bindings/dma/qcom_adm.txt
+++ b/Documentation/devicetree/bindings/dma/qcom_adm.txt
@@ -4,8 +4,7 @@ Required properties:
 - compatible: must contain "qcom,adm" for IPQ/APQ8064 and MSM8960
 - reg: Address range for DMA registers
 - interrupts: Should contain one interrupt shared by all channels
-- #dma-cells: must be <2>.  First cell denotes the channel number.  Second cell
-  denotes CRCI (client rate control interface) flow control assignment.
+- #dma-cells: must be <1>.  First cell denotes the channel number.
 - clocks: Should contain the core clock and interface clock.
 - clock-names: Must contain "core" for the core clock and "iface" for the
   interface clock.
@@ -22,7 +21,7 @@ Example:
 			compatible = "qcom,adm";
 			reg = <0x18300000 0x100000>;
 			interrupts = <0 170 0>;
-			#dma-cells = <2>;
+			#dma-cells = <1>;
 
 			clocks = <&gcc ADM0_CLK>, <&gcc ADM0_PBUS_CLK>;
 			clock-names = "core", "iface";
@@ -35,15 +34,12 @@ Example:
 			qcom,ee = <0>;
 		};
 
-DMA clients must use the format descripted in the dma.txt file, using a three
+DMA clients must use the format descripted in the dma.txt file, using a two
 cell specifier for each channel.
 
-Each dmas request consists of 3 cells:
+Each dmas request consists of two cells:
  1. phandle pointing to the DMA controller
  2. channel number
- 3. CRCI assignment, if applicable.  If no CRCI flow control is required, use 0.
-    The CRCI is used for flow control.  It identifies the peripheral device that
-    is the source/destination for the transferred data.
 
 Example:
 
@@ -55,7 +51,7 @@ Example:
 
 		cs-gpios = <&qcom_pinmux 20 0>;
 
-		dmas = <&adm_dma 6 9>,
-			<&adm_dma 5 10>;
+		dmas = <&adm_dma 6>,
+			<&adm_dma 5>;
 		dma-names = "rx", "tx";
 	};