linux-kernel - [PATCH 14/14] arm: dts: OpenPower Palmetto system can use coprocessor for FSI

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Date:   Wed, 27 Jun 2018 09:26:05 +1000
From:   Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:     Joel Stanley <joel@....id.au>
Cc:     linux-aspeed@...ts.ozlabs.org, openbmc@...ts.ozlabs.org,
        devicetree@...r.kernel.org, Andrew Jeffery <andrew@...id.au>,
        linux-kernel@...r.kernel.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH 14/14] arm: dts: OpenPower Palmetto system can use coprocessor for FSI

This switches away from userspace bitbanging to kernel FSI
using the coprocessor.

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---
 arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts | 31 ++++++++++++++-----
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts b/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
index e6095f51ecf5..ba49b812e0bd 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
@@ -31,6 +31,11 @@
 			no-map;
 			reg = <0x98000000 0x01000000>; /* 16MB */
 		};
+
+		coldfire_memory: codefire_memory@...00000 {
+			reg = <0x5ee00000 0x00200000>;
+			no-map;
+		};
 	};
 
 	leds {
@@ -49,6 +54,25 @@
 		};
 	};
 
+	fsi: gpio-fsi {
+		compatible = "ibm,fsi-master-ast2400-cf", "fsi-master";
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		memory-region = <&coldfire_memory>;
+		sram = <&sram>;
+		cvic = <&cvic>;
+
+		fw-name = "palmetto";
+		fw-platform-sig = <0x5061>;
+
+		clock-gpios = <&gpio ASPEED_GPIO(A, 4) GPIO_ACTIVE_HIGH>;
+		data-gpios = <&gpio ASPEED_GPIO(A, 5) GPIO_ACTIVE_HIGH>;
+		mux-gpios = <&gpio ASPEED_GPIO(A, 6) GPIO_ACTIVE_HIGH>;
+		enable-gpios = <&gpio ASPEED_GPIO(D, 0) GPIO_ACTIVE_HIGH>;
+		trans-gpios = <&gpio ASPEED_GPIO(H, 6) GPIO_ACTIVE_HIGH>;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -323,13 +347,6 @@
 		line-name = "SYS_PWROK_BMC";
 	};
 
-	pin_gpio_h6 {
-		gpio-hog;
-		gpios = <ASPEED_GPIO(H, 6) GPIO_ACTIVE_HIGH>;
-		output-high;
-		line-name = "SCM1_FSI0_DATA_EN";
-	};
-
 	pin_gpio_h7 {
 		gpio-hog;
 		gpios = <ASPEED_GPIO(H, 7) GPIO_ACTIVE_HIGH>;
-- 
2.17.1