[RESEND PATCH] arm64: dts: ti: k3-am64-main: Add ADC nodes

[Vignesh Raghavendra <vigneshr@ti.com>]

AM64 SoC has a single ADC IP with 8 channels. Add DT node for the same.

Default usecase is to control ADC from non Linux core on the system on
AM642 GP EVM, therefore mark the node as reserved in k3-am642-evm.dts
file. ADC lines are not pinned out on AM642 SK board, therefore disable
the node in k3-am642-sk.dts file.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
---

Rebase onto latest k3-dts-next:
v1: lore.kernel.org/r/20210309130708.12391-1-vigneshr@ti.com

Do note that dtbs_check warns about having the bindings converted to
YAML which is in my future TODO list.

 arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 17 +++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am642-evm.dts  |  5 +++++
 arch/arm64/boot/dts/ti/k3-am642-sk.dts   |  4 ++++
 3 files changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
index 7e7997e3adff..dc852f63d1a2 100644
--- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
@@ -521,4 +521,21 @@ usb0: usb@f400000{
 			dr_mode = "otg";
 		};
 	};
+
+	tscadc0: tscadc@28001000 {
+		compatible = "ti,am654-tscadc", "ti,am3359-tscadc";
+		reg = <0x00 0x28001000 0x00 0x1000>;
+		interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
+		power-domains = <&k3_pds 0 TI_SCI_PD_EXCLUSIVE>;
+		clocks = <&k3_clks 0 0>;
+		assigned-clocks = <&k3_clks 0 0>;
+		assigned-clock-parents = <&k3_clks 0 3>;
+		assigned-clock-rates = <60000000>;
+		clock-names = "adc_tsc_fck";
+
+		adc {
+			#io-channel-cells = <1>;
+			compatible = "ti,am654-adc", "ti,am3359-adc";
+		};
+	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 1365e3164294..6331fd426157 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -377,3 +377,8 @@ cpsw3g_phy0: ethernet-phy@0 {
 		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 	};
 };
+
+&tscadc0 {
+	/* ADC is reserved for R5 usage */
+	status = "reserved";
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index 397ed3b2e121..8f9b1078b7b5 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -244,3 +244,7 @@ cpsw3g_phy1: ethernet-phy@1 {
 		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 	};
 };
+
+&tscadc0 {
+	status = "disabled";
+};
-- 
2.31.0