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authorOlof Johansson2012-11-29 22:39:11 -0800
committerOlof Johansson2012-11-29 22:39:11 -0800
commit68fb31706d50dd5d337cd7928aeb780358b910a5 (patch)
tree6632d05aae22e99d7f128104b536bfdfc225a696 /arch/arm/mach-omap1/sram-init.c
parent9489e9dcae718d5fde988e4a684a0f55b5f94d17 (diff)
parentc8a1ceccf394b2f99feed2b702732140e9f0f92d (diff)
Merge branch 'next/cleanup' into next/pm2
By Tony Lindgren (36) and others via Tony Lindgren (22) and others * next/cleanup: (303 commits) ARM: Kirkwood: Use hw_pci.ops instead of hw_pci.scan ARM: OMAP3: cm-t3517: use GPTIMER for system clock ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER ARM: SAMSUNG: use devm_ functions for ADC driver ARM: EXYNOS: no duplicate mask/unmask in eint0_15 ARM: S3C24XX: SPI clock channel setup is fixed for S3C2443 ARM: EXYNOS: Remove i2c0 resource information and setting of device names ARM: Kirkwood: checkpatch cleanups ARM: Kirkwood: Fix sparse warnings. ARM: Kirkwood: Remove unused includes ARM: kirkwood: cleanup lsxl board includes ARM: integrator: use BUG_ON where possible ARM: integrator: push down SC dependencies ARM: integrator: delete static UART1 mapping ARM: integrator: delete SC mapping on the CP ARM: integrator: remove static CP syscon mapping ARM: integrator: remove static AP syscon mapping ARM: integrator: hook the CP into the SoC bus ARM: integrator: hook the AP into the SoC bus ARM: OMAP2+: Fix compiler warning for 32k timer ...
Diffstat (limited to 'arch/arm/mach-omap1/sram-init.c')
-rw-r--r--arch/arm/mach-omap1/sram-init.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/sram-init.c b/arch/arm/mach-omap1/sram-init.c
new file mode 100644
index 000000000000..6431b0f862ce
--- /dev/null
+++ b/arch/arm/mach-omap1/sram-init.c
@@ -0,0 +1,76 @@
+/*
+ * OMAP SRAM detection and management
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * Written by Tony Lindgren <tony@atomide.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/fncpy.h>
+#include <asm/tlb.h>
+#include <asm/cacheflush.h>
+
+#include <asm/mach/map.h>
+
+#include "soc.h"
+#include "sram.h"
+
+#define OMAP1_SRAM_PA 0x20000000
+#define SRAM_BOOTLOADER_SZ 0x80
+
+/*
+ * The amount of SRAM depends on the core type.
+ * Note that we cannot try to test for SRAM here because writes
+ * to secure SRAM will hang the system. Also the SRAM is not
+ * yet mapped at this point.
+ */
+static void __init omap_detect_and_map_sram(void)
+{
+ unsigned long omap_sram_skip = SRAM_BOOTLOADER_SZ;
+ unsigned long omap_sram_start = OMAP1_SRAM_PA;
+ unsigned long omap_sram_size;
+
+ if (cpu_is_omap7xx())
+ omap_sram_size = 0x32000; /* 200K */
+ else if (cpu_is_omap15xx())
+ omap_sram_size = 0x30000; /* 192K */
+ else if (cpu_is_omap1610() || cpu_is_omap1611() ||
+ cpu_is_omap1621() || cpu_is_omap1710())
+ omap_sram_size = 0x4000; /* 16K */
+ else {
+ pr_err("Could not detect SRAM size\n");
+ omap_sram_size = 0x4000;
+ }
+
+ omap_map_sram(omap_sram_start, omap_sram_size,
+ omap_sram_skip, 1);
+}
+
+static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl);
+
+void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl)
+{
+ BUG_ON(!_omap_sram_reprogram_clock);
+ /* On 730, bit 13 must always be 1 */
+ if (cpu_is_omap7xx())
+ ckctl |= 0x2000;
+ _omap_sram_reprogram_clock(dpllctl, ckctl);
+}
+
+int __init omap_sram_init(void)
+{
+ omap_detect_and_map_sram();
+ _omap_sram_reprogram_clock =
+ omap_sram_push(omap1_sram_reprogram_clock,
+ omap1_sram_reprogram_clock_sz);
+
+ return 0;
+}