/branches/gl-inet/target/linux/ipq806x/patches-4.14/0001-dtbindings-qcom_adm-Fix-channel-specifiers.patch |
@@ -0,0 +1,71 @@ |
From 28d0ed88f536dd639adf1b0c7c08e04be3c8f294 Mon Sep 17 00:00:00 2001 |
From: Thomas Pedersen <twp@codeaurora.org> |
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 <agross@codeaurora.org> |
Signed-off-by: Thomas Pedersen <twp@codeaurora.org> |
--- |
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. |
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Example: |
|
@@ -55,7 +51,7 @@ Example: |
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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"; |
}; |