From c3fb99f46efdd34ea84c1968065aaa15164d4500 Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@atomide.com>
Date: Wed, 14 Aug 2019 06:14:08 -0700
Subject: ARM: dts: Configure rstctrl reset for am335x SGX
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The following can be tested via sysfs with the following to ensure the SGX
module gets enabled and disabled properly:

# echo on > /sys/bus/platform/devices/5600fe00.target-module/power/control
# rwmem 0x5600fe00		# revision register
0x5600fe00 = 0x40000000
# echo auto > /sys/bus/platform/devices/5600fe00.target-module/power/control
# rwmem 0x5000fe00
Bus error

Note that this patch depends on the PRM rstctrl driver that has
been recently posted. If the child device driver(s) need to prevent
rstctrl reset on PM runtime suspend, the drivers need to increase
the usecount for the shared rstctrl reset that can be mapped also
for the child device(s) or accessed via dev->parent.

Cc: Adam Ford <aford173@gmail.com>
Cc: Filip Matijević <filip.matijevic.pz@gmail.com>
Cc: "H. Nikolaus Schaller" <hns@goldelico.com>
Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Cc: moaz korena <moaz@korena.xyz>
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Cc: Philipp Rossak <embed3d@gmail.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/boot/dts/am33xx.dtsi | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'arch/arm/boot/dts/am33xx.dtsi')

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 646f11430dad..c427ce8c2539 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -457,6 +457,31 @@
 			       <&edma 5 0>;
 			dma-names = "tx", "rx";
 		};
+
+		target-module@56000000 {
+			compatible = "ti,sysc-omap4", "ti,sysc";
+			reg = <0x5600fe00 0x4>,
+			      <0x5600fe10 0x4>;
+			reg-names = "rev", "sysc";
+			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 = <&gfx_l3_clkctrl AM3_GFX_L3_GFX_CLKCTRL 0>;
+			clock-names = "fck";
+			resets = <&prm_gfx 0>;
+			reset-names = "rstctrl";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x56000000 0x1000000>;
+
+			/*
+			 * Closed source PowerVR driver, no child device
+			 * binding or driver in mainline
+			 */
+		};
 	};
 };
 
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