diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.14/0001-dtbindings-qcom_adm-Fix-channel-specifiers.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-4.14/0001-dtbindings-qcom_adm-Fix-channel-specifiers.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.14/0001-dtbindings-qcom_adm-Fix-channel-specifiers.patch b/target/linux/ipq806x/patches-4.14/0001-dtbindings-qcom_adm-Fix-channel-specifiers.patch new file mode 100644 index 0000000000..da962c7130 --- /dev/null +++ b/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. + + 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"; + }; |