linux-kernel - [PATCH v4 2/5] zynq: use pl310 device tree bindings

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Message-Id: <a60818e7f2bf13cbc06b21bb3e3b0071539379ea.1351466765.git.josh.cartwright@ni.com>
Date:	Tue, 23 Oct 2012 17:34:22 -0500
From:	Josh Cartwright <josh.cartwright@...com>
To:	arm@...nel.org, Arnd Bergmann <arnd@...db.de>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	John Linn <john.linn@...inx.com>,
	Nick Bowler <nbowler@...iptictech.com>,
	Michal Simek <michal.simek@...inx.com>
Subject: [PATCH v4 2/5] zynq: use pl310 device tree bindings

The Zynq has a PL310 L2 cache controller.  Convert in-tree uses to using
the device tree.

Signed-off-by: Josh Cartwright <josh.cartwright@...com>
Cc: John Linn <john.linn@...inx.com>
Acked-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Michal Simek <michal.simek@...inx.com>
---
 arch/arm/boot/dts/zynq-ep107.dts           | 9 +++++++++
 arch/arm/mach-zynq/common.c                | 9 +--------
 arch/arm/mach-zynq/include/mach/zynq_soc.h | 4 ----
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/arch/arm/boot/dts/zynq-ep107.dts b/arch/arm/boot/dts/zynq-ep107.dts
index f914090..574bc04 100644
--- a/arch/arm/boot/dts/zynq-ep107.dts
+++ b/arch/arm/boot/dts/zynq-ep107.dts
@@ -44,6 +44,15 @@
 			      <0xF8F00100 0x100>;
 		};
 
+		L2: cache-controller {
+			compatible = "arm,pl310-cache";
+			reg = <0xF8F02000 0x1000>;
+			arm,data-latency = <2 3 2>;
+			arm,tag-latency = <2 3 2>;
+			cache-unified;
+			cache-level = <2>;
+		};
+
 		uart0: uart@...00000 {
 			compatible = "xlnx,xuartps";
 			reg = <0xE0000000 0x1000>;
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index d73963b..056091a 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -45,12 +45,10 @@ static struct of_device_id zynq_of_bus_ids[] __initdata = {
  */
 static void __init xilinx_init_machine(void)
 {
-#ifdef CONFIG_CACHE_L2X0
 	/*
 	 * 64KB way size, 8-way associativity, parity disabled
 	 */
-	l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF);
-#endif
+	l2x0_of_init(0x02060000, 0xF0F0FFFF);
 
 	of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
 }
@@ -83,11 +81,6 @@ static struct map_desc io_desc[] __initdata = {
 		.pfn		= __phys_to_pfn(SCU_PERIPH_PHYS),
 		.length		= SZ_8K,
 		.type		= MT_DEVICE,
-	}, {
-		.virtual	= PL310_L2CC_VIRT,
-		.pfn		= __phys_to_pfn(PL310_L2CC_PHYS),
-		.length		= SZ_4K,
-		.type		= MT_DEVICE,
 	},
 
 #ifdef CONFIG_DEBUG_LL
diff --git a/arch/arm/mach-zynq/include/mach/zynq_soc.h b/arch/arm/mach-zynq/include/mach/zynq_soc.h
index 3d1c6a6..218283a 100644
--- a/arch/arm/mach-zynq/include/mach/zynq_soc.h
+++ b/arch/arm/mach-zynq/include/mach/zynq_soc.h
@@ -25,9 +25,6 @@
 #define TTC0_PHYS			0xF8001000
 #define TTC0_VIRT			TTC0_PHYS
 
-#define PL310_L2CC_PHYS			0xF8F02000
-#define PL310_L2CC_VIRT			PL310_L2CC_PHYS
-
 #define SCU_PERIPH_PHYS			0xF8F00000
 #define SCU_PERIPH_VIRT			SCU_PERIPH_PHYS
 
@@ -35,7 +32,6 @@
 
 #define TTC0_BASE			IOMEM(TTC0_VIRT)
 #define SCU_PERIPH_BASE			IOMEM(SCU_PERIPH_VIRT)
-#define PL310_L2CC_BASE			IOMEM(PL310_L2CC_VIRT)
 
 /*
  * Mandatory for CONFIG_LL_DEBUG, UART is mapped virtual = physical
-- 
1.8.0


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