linux-kernel - [PATCH v2 3/5] ARM: dts: AM33xx-l4: Update PRUSS interconnect target-module node

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Message-ID: <20200227222837.7329-4-s-anna@ti.com>
Date:   Thu, 27 Feb 2020 16:28:35 -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 v2 3/5] ARM: dts: AM33xx-l4: Update PRUSS interconnect target-module node

The PRU-ICSS present on some AM33xx SoCs has a very unique SYSC
register. The IP also uses a hard-reset line, and requires this
PRCM reset to be deasserted to be able to access any registers.
Update the existing PRUSS interconnect target-module with all
the required properties.

The PRUSS device itself shall be added as a child node to this
interconnect node in the future. PRU-ICSS is not supported on
AM3351/AM3352/AM3354 SoCs though in the AM33xx family, so the
target module node should be disabled in derivative board files
that use any of these SoCs.

Signed-off-by: Suman Anna <s-anna@...com>
---
v2: Revise patch description, no code changes

 arch/arm/boot/dts/am33xx-l4.dtsi | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/am33xx-l4.dtsi b/arch/arm/boot/dts/am33xx-l4.dtsi
index 4e2986f0c604..5ed7f3c58c0f 100644
--- a/arch/arm/boot/dts/am33xx-l4.dtsi
+++ b/arch/arm/boot/dts/am33xx-l4.dtsi
@@ -759,12 +759,27 @@
 			ranges = <0x0 0x200000 0x80000>;
 		};
 
-		target-module@...000 {			/* 0x4a300000, ap 9 04.0 */
-			compatible = "ti,sysc";
-			status = "disabled";
+		pruss_tm: target-module@...000 {	/* 0x4a300000, ap 9 04.0 */
+			compatible = "ti,sysc-pruss", "ti,sysc";
+			reg = <0x326000 0x4>,
+			      <0x326004 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 AM3_PRUSS_OCP_PRUSS_CLKCTRL 0>;
+			clock-names = "fck";
+			resets = <&prm_per 1>;
+			reset-names = "rstctrl";
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0x0 0x300000 0x80000>;
+			status = "disabled";
 		};
 	};
 };
-- 
2.23.0