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From 154571d1620731a3207da126eb4f139a1534f293 Mon Sep 17 00:00:00 2001
From: Koen Kooi <koen@dominion.thruhere.net>
Date: Thu, 6 Jan 2011 13:13:18 +0100
Subject: [PATCH 2/4] OMAP35x: Add support for 720MHz part
This patch adds support for ARM running at 720MHz part.
The 720MHz capability can be probed run-time by reading the
PRODID.SKUID[3:0] at 0x4830A20C.
[1] http://focus.ti.com/lit/ug/spruff1d/spruff1d.pdf
This is a forward port of https://patchwork.kernel.org/patch/53125/
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
---
arch/arm/mach-omap2/control.h | 7 +++++++
arch/arm/mach-omap2/id.c | 10 ++++++++++
arch/arm/plat-omap/include/plat/cpu.h | 2 ++
3 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h
index f0629ae..b9671d3 100644
--- a/arch/arm/mach-omap2/control.h
+++ b/arch/arm/mach-omap2/control.h
@@ -365,7 +365,14 @@
#define FEAT_NEON 0
#define FEAT_NEON_NONE 1
+/*
+ * Product ID register
+ */
+#define OMAP3_PRODID 0x020C
+#define OMAP3_SKUID_MASK 0x0f
+#define OMAP3_SKUID_720MHZ 0x08
+
#ifndef __ASSEMBLY__
#ifdef CONFIG_ARCH_OMAP2PLUS
extern void __iomem *omap_ctrl_base_get(void);
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 5f9086c..53fbe01 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -195,6 +195,15 @@ static void __init omap3_check_features(void)
* TODO: Get additional info (where applicable)
* e.g. Size of L2 cache.
*/
+
+ /*
+ * Does it support 720MHz?
+ */
+ status = (OMAP3_SKUID_MASK & read_tap_reg(OMAP3_PRODID));
+
+ if (status & OMAP3_SKUID_720MHZ) {
+ omap3_features |= OMAP3_HAS_720MHZ;
+ }
}
static void __init omap3_check_revision(void)
@@ -445,6 +454,7 @@ static void __init omap3_cpuinfo(void)
OMAP3_SHOW_FEATURE(neon);
OMAP3_SHOW_FEATURE(isp);
OMAP3_SHOW_FEATURE(192mhz_clk);
+ OMAP3_SHOW_FEATURE(720mhz);
printk(")\n");
}
diff --git a/arch/arm/plat-omap/include/plat/cpu.h b/arch/arm/plat-omap/include/plat/cpu.h
index 1a8c347..7d24faa 100644
--- a/arch/arm/plat-omap/include/plat/cpu.h
+++ b/arch/arm/plat-omap/include/plat/cpu.h
@@ -510,6 +510,7 @@ extern u32 omap3_features;
#define OMAP3_HAS_ISP BIT(4)
#define OMAP3_HAS_192MHZ_CLK BIT(5)
#define OMAP3_HAS_IO_WAKEUP BIT(6)
+#define OMAP3_HAS_720MHZ BIT(7)
#define OMAP3_HAS_FEATURE(feat,flag) \
static inline unsigned int omap3_has_ ##feat(void) \
@@ -524,5 +525,6 @@ OMAP3_HAS_FEATURE(neon, NEON)
OMAP3_HAS_FEATURE(isp, ISP)
OMAP3_HAS_FEATURE(192mhz_clk, 192MHZ_CLK)
OMAP3_HAS_FEATURE(io_wakeup, IO_WAKEUP)
+OMAP3_HAS_FEATURE(720mhz, 720MHZ)
#endif
--
1.6.6.1
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