linux-kernel - [PATCH 04/12] ARM: dts: AM4372: Add the PRU-ICSS interconnect target-module node

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Message-ID: <20200225204649.28220-5-s-anna@ti.com>
Date:   Tue, 25 Feb 2020 14:46:41 -0600
From:   Suman Anna <s-anna@...com>
To:     Tony Lindgren <tony@...mide.com>
CC:     Roger Quadros <rogerq@...com>, Tero Kristo <t-kristo@...com>,
        <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Suman Anna <s-anna@...com>
Subject: [PATCH 04/12] ARM: dts: AM4372: Add the PRU-ICSS interconnect target-module node

The AM437x family of SoCs contains two dissimilar PRU-ICSS instances,
but leverage a common reset line and SYSCFG from the larger PRU-ICSS1
instance. This SYSC register has also very unique bit-fields. Both
the IPs require the PRCM reset to be deasserted to be able to access
any registers. Add a common PRUSS interconnect target-module with all
the required properties.

The PRUSS devices themselves shall be added as child nodes to this
interconnect node in the future. The PRU-ICSS instances are not
supported on AM4372 SoC though in the AM437x family, so the target
module node should be enabled in only those derivative board files
that use a SoC containing the PRU-ICSS IPs.

Signed-off-by: Suman Anna <s-anna@...com>
---
 arch/arm/boot/dts/am4372.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index faa14dc0faff..979fa7f67825 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -344,6 +344,29 @@
 			};
 		};
 
+		pruss_tm: target-module@...00000 {
+			compatible = "ti,sysc-pruss", "ti,sysc";
+			reg = <0x54426000 0x4>,
+			      <0x54426004 0x4>;
+			reg-names = "rev", "sysc";
+			ti,sysc-mask = <(SYSC_PRUSS_STANDBY_INIT |
+					 SYSC_PRUSS_SUB_MWAIT)>;
+			ti,sysc-midle = <SYSC_IDLE_FORCE>,
+					<SYSC_IDLE_NO>,
+					<SYSC_IDLE_SMART>;
+			ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+					<SYSC_IDLE_NO>,
+					<SYSC_IDLE_SMART>;
+			clocks = <&pruss_ocp_clkctrl AM4_PRUSS_OCP_PRUSS_CLKCTRL 0>;
+			clock-names = "fck";
+			resets = <&prm_per 1>;
+			reset-names = "rstctrl";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0x0 0x54400000 0x80000>;
+			status = "disabled";
+		};
+
 		gpmc: gpmc@...00000 {
 			compatible = "ti,am3352-gpmc";
 			ti,hwmods = "gpmc";
-- 
2.23.0