This patch adds automatic configuration for the ADM CRCI muxing required to
support DMA operations for GSBI clients.  The GSBI mode and instance determine
the correct TCSR ADM CRCI MUX value that must be programmed so that the DMA
works properly.

Signed-off-by: Andy Gross <redacted>
---
.../devicetree/bindings/soc/qcom/qcom,gsbi.txt     |   18 ++-
drivers/soc/qcom/Kconfig                           |    1 +
drivers/soc/qcom/qcom_gsbi.c                       |  153 ++++++++++++++++++++
3 files changed, 171 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt
index 4ce24d4..8fe7b37 100644
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt

@@ -6,7 +6,7 @@ configuration settings.  The mode setting will govern the input/output mode of

the 4 GSBI IOs.

Required properties:
-- compatible: must contain "qcom,gsbi-v1.0.0" for APQ8064/IPQ8064
+- compatible:	Should contain "qcom,gsbi-v1.0.0"
- reg: Address range for GSBI registers
- clocks: required clock
- clock-names: must contain "iface" entry

@@ -16,12 +16,16 @@ Required properties:

Optional properties:
- qcom,crci : indicates CRCI MUX value for QUP CRCI ports.  Please reference
  dt-bindings/soc/qcom,gsbi.h for valid CRCI mux values.
+- syscon-tcsr: indicates phandle of TCSR syscon node.  Required if child uses
+  dma.

Required properties if child node exists:
- #address-cells: Must be 1
- #size-cells: Must be 1
- ranges: Must be present

+Note: Each GSBI should have an alias correctly numbered in "aliases" node.
+
Properties for children:

A GSBI controller node can contain 0 or more child nodes representing serial

@@ -37,6 +41,10 @@ Example for APQ8064:

#include <dt-bindings/soc/qcom,gsbi.h>

+	aliases {
+		gsbi4 = <&gsbi4>;
+	};

+
	gsbi4 at 16300000 {
		compatible = "qcom,gsbi-v1.0.0";
		reg = <0x16300000 0x100>;

@@ -48,6 +56,8 @@ Example for APQ8064:

		qcom,mode = <GSBI_PROT_I2C_UART>;
		qcom,crci = <GSBI_CRCI_QUP>;

+		syscon-tcsr = <&tcsr>;
+
		/* child nodes go under here */

		i2c_qup4: i2c at 16380000 {

@@ -76,3 +86,9 @@ Example for APQ8064:

		};
	};

+	tcsr: syscon at 1a400000 {
+		compatible = "qcom,apq8064-tcsr", "syscon";
+		reg = <0x1a400000 0x100>;
+	};
+
+