[PATCH 2/2] ARM: OMAP4+: Move SRAM data to DT

[rnayak@ti.com (Rajendra Nayak)]

Use drivers/misc/sram.c driver to manage SRAM on all DT only
OMAP platforms (am33xx, am43xx, omap4 and omap5) instead of
the existing private implementation.

Address and size related data  is removed from mach-omap2/sram.c
and now passed to drivers/misc/sram.c from DT.

Users can hence use general purpose allocator apis instead of
OMAP private ones to manage and use SRAM.

Currently there are no users on SRAM on these platfoms.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
---
 arch/arm/boot/dts/am33xx.dtsi        |    5 +++++
 arch/arm/boot/dts/am4372.dtsi        |    5 +++++
 arch/arm/boot/dts/omap4.dtsi         |    5 +++++
 arch/arm/boot/dts/omap5.dtsi         |    5 +++++
 arch/arm/configs/omap2plus_defconfig |    1 +
 arch/arm/mach-omap2/sram.c           |   32 +-------------------------------
 arch/arm/mach-omap2/sram.h           |    1 -
 7 files changed, 22 insertions(+), 32 deletions(-)

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 38b446b..6ed766e 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -88,6 +88,11 @@
 		ranges;
 		ti,hwmods = "l3_main";
 
+		sram: sram at 40300000 {
+			compatible = "mmio-sram";
+			reg = <0x40300000 0x10000>; /* 64k */
+		};
+
 		intc: interrupt-controller at 48200000 {
 			compatible = "ti,omap2-intc";
 			interrupt-controller;
diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index ddc1df7..c78b74f 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -41,6 +41,11 @@
 		#size-cells = <1>;
 		ranges;
 
+		sram: sram at 40300000 {
+			compatible = "mmio-sram";
+			reg = <0x40300000 0x40000>; /* 256k */
+		};
+
 		uart0: serial at 44e09000 {
 			compatible = "ti,am4372-uart","ti,omap2-uart";
 			reg = <0x44e09000 0x2000>;
diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index 22d9f2b..292e5b5 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -126,6 +126,11 @@
 			pinctrl-single,function-mask = <0x7fff>;
 		};
 
+		sram: sram at 40304000 {
+			compatible = "mmio-sram";
+			reg = <0x40304000 0xa000>; /* 40k */
+		};
+
 		sdma: dma-controller at 4a056000 {
 			compatible = "ti,omap4430-sdma";
 			reg = <0x4a056000 0x1000>;
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index e643620..a9e3e6c 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -119,6 +119,11 @@
 			pinctrl-single,function-mask = <0x7fff>;
 		};
 
+		sram: sram at 40300000 {
+			compatible = "mmio-sram";
+			reg = <0x40300000 0x20000>; /* 128k */
+		};
+
 		sdma: dma-controller at 4a056000 {
 			compatible = "ti,omap4430-sdma";
 			reg = <0x4a056000 0x1000>;
diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index 5339e6a..5d4c9b8 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -101,6 +101,7 @@ CONFIG_SENSORS_LIS3LV02D=m
 CONFIG_SENSORS_TSL2550=m
 CONFIG_SENSORS_LIS3_I2C=m
 CONFIG_BMP085_I2C=m
+CONFIG_SRAM=y
 CONFIG_SCSI=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_SCSI_MULTI_LUN=y
diff --git a/arch/arm/mach-omap2/sram.c b/arch/arm/mach-omap2/sram.c
index 305fc2b..8591044 100644
--- a/arch/arm/mach-omap2/sram.c
+++ b/arch/arm/mach-omap2/sram.c
@@ -32,12 +32,6 @@
 
 #define OMAP2_SRAM_PUB_PA	(OMAP2_SRAM_PA + 0xf800)
 #define OMAP3_SRAM_PUB_PA       (OMAP3_SRAM_PA + 0x8000)
-#ifdef CONFIG_OMAP4_ERRATA_I688
-#define OMAP4_SRAM_PUB_PA	OMAP4_SRAM_PA
-#else
-#define OMAP4_SRAM_PUB_PA	(OMAP4_SRAM_PA + 0x4000)
-#endif
-#define OMAP5_SRAM_PA		0x40300000
 
 #define SRAM_BOOTLOADER_SZ	0x00
 
@@ -105,32 +99,14 @@ static void __init omap_detect_sram(void)
 			} else {
 				omap_sram_size = 0x8000; /* 32K */
 			}
-		} else if (cpu_is_omap44xx()) {
-			omap_sram_start = OMAP4_SRAM_PUB_PA;
-			omap_sram_size = 0xa000; /* 40K */
-		} else if (soc_is_omap54xx()) {
-			omap_sram_start = OMAP5_SRAM_PA;
-			omap_sram_size = SZ_128K; /* 128KB */
 		} else {
 			omap_sram_start = OMAP2_SRAM_PUB_PA;
 			omap_sram_size = 0x800; /* 2K */
 		}
 	} else {
-		if (soc_is_am33xx()) {
-			omap_sram_start = AM33XX_SRAM_PA;
-			omap_sram_size = 0x10000; /* 64K */
-		} else if (soc_is_am43xx()) {
-			omap_sram_start = AM33XX_SRAM_PA;
-			omap_sram_size = SZ_256K;
-		} else if (cpu_is_omap34xx()) {
+		if (cpu_is_omap34xx()) {
 			omap_sram_start = OMAP3_SRAM_PA;
 			omap_sram_size = 0x10000; /* 64K */
-		} else if (cpu_is_omap44xx()) {
-			omap_sram_start = OMAP4_SRAM_PA;
-			omap_sram_size = 0xe000; /* 56K */
-		} else if (soc_is_omap54xx()) {
-			omap_sram_start = OMAP5_SRAM_PA;
-			omap_sram_size = SZ_128K; /* 128KB */
 		} else {
 			omap_sram_start = OMAP2_SRAM_PA;
 			if (cpu_is_omap242x())
@@ -148,12 +124,6 @@ static void __init omap2_map_sram(void)
 {
 	int cached = 1;
 
-#ifdef CONFIG_OMAP4_ERRATA_I688
-	if (cpu_is_omap44xx()) {
-		omap_sram_start += PAGE_SIZE;
-		omap_sram_size -= SZ_16K;
-	}
-#endif
 	if (cpu_is_omap34xx()) {
 		/*
 		 * SRAM must be marked as non-cached on OMAP3 since the
diff --git a/arch/arm/mach-omap2/sram.h b/arch/arm/mach-omap2/sram.h
index ca7277c..3f83b80 100644
--- a/arch/arm/mach-omap2/sram.h
+++ b/arch/arm/mach-omap2/sram.h
@@ -80,4 +80,3 @@ static inline void omap_push_sram_idle(void) {}
 #else
 #define OMAP4_SRAM_PA		0x40300000
 #endif
-#define AM33XX_SRAM_PA		0x40300000
-- 
1.7.9.5