ARM: OMAP4+: Move SRAM data to DT

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 plat-omap/sram.c

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.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am33xx.dtsi

@@ -726,9 +726,8 @@
 		};
 
 		ocmcram: ocmcram@40300000 {
-			compatible = "ti,am3352-ocmcram";
-			reg = <0x40300000 0x10000>;
-			ti,hwmods = "ocmcram";
+			compatible = "mmio-sram";
+			reg = <0x40300000 0x10000>; /* 64k */
 		};
 
 		wkup_m3: wkup_m3@44d00000 {

arch/arm/boot/dts/am4372.dtsi

@@ -885,6 +885,11 @@
 				clock-names = "fck";
 			};
 		};
+
+		ocmcram: ocmcram@40300000 {
+			compatible = "mmio-sram";
+			reg = <0x40300000 0x40000>; /* 256k */
+		};
 	};
 };
 

arch/arm/boot/dts/omap4.dtsi

@@ -209,6 +209,11 @@
 			};
 		};
 
+		ocmcram: ocmcram@40304000 {
+			compatible = "mmio-sram";
+			reg = <0x40304000 0xa000>; /* 40k */
+		};
+
 		sdma: dma-controller@4a056000 {
 			compatible = "ti,omap4430-sdma";
 			reg = <0x4a056000 0x1000>;

arch/arm/boot/dts/omap5.dtsi

@@ -220,6 +220,11 @@
 			};
 		};
 
+		ocmcram: ocmcram@40300000 {
+			compatible = "mmio-sram";
+			reg = <0x40300000 0x20000>; /* 128k */
+		};
+
 		sdma: dma-controller@4a056000 {
 			compatible = "ti,omap4430-sdma";
 			reg = <0x4a056000 0x1000>;

arch/arm/configs/omap2plus_defconfig

@@ -122,6 +122,7 @@ CONFIG_BLK_DEV_RAM_SIZE=16384
 CONFIG_SENSORS_TSL2550=m
 CONFIG_BMP085_I2C=m
 CONFIG_SENSORS_LIS3_I2C=m
+CONFIG_SRAM=y
 CONFIG_SCSI=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_SCSI_SCAN_ASYNC=y

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())

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