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 Signed-off-by: Sanjeev Premi <[email protected]> --- arch/arm/mach-omap2/clock34xx.c | 6 ++++++ arch/arm/mach-omap2/id.c | 11 +++++++++++ arch/arm/plat-omap/include/mach/control.h | 7 +++++++ arch/arm/plat-omap/include/mach/cpu.h | 2 ++ 4 files changed, 26 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c index 489556e..9b56af3 100644 --- a/arch/arm/mach-omap2/clock34xx.c +++ b/arch/arm/mach-omap2/clock34xx.c @@ -1096,6 +1096,12 @@ static int __init omap2_clk_arch_init(void) if (!mpurate) return -EINVAL; + if ((mpurate == 720000000) && !omap3_has_720mhz()) { + printk(KERN_ERR "*** Silicon doesn't support 720MHz\n"); + + mpurate = 600000000; /* Set to highest supported */ + } + /* REVISIT: not yet ready for 343x */ if (clk_set_rate(&dpll1_ck, mpurate)) printk(KERN_ERR "*** Unable to set MPU rate\n"); diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index d4d563b..e0b427a 100644 --- a/arch/arm/mach-omap2/id.c +++ b/arch/arm/mach-omap2/id.c @@ -79,6 +79,7 @@ EXPORT_SYMBOL(omap_type); #define OMAP_TAP_DIE_ID_2 0x0220 #define OMAP_TAP_DIE_ID_3 0x0224 + #define read_tap_reg(reg) __raw_readl(tap_base + (reg)) struct omap_id { @@ -180,6 +181,15 @@ 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; + } } void __init omap3_check_revision(void) @@ -296,6 +306,7 @@ void __init omap3_cpuinfo(void) OMAP3_SHOW_FEATURE(sgx); OMAP3_SHOW_FEATURE(neon); OMAP3_SHOW_FEATURE(isp); + OMAP3_SHOW_FEATURE(720mhz); } /* diff --git a/arch/arm/plat-omap/include/mach/control.h b/arch/arm/plat-omap/include/mach/control.h index fdb6300..e886bb6 100644 --- a/arch/arm/plat-omap/include/mach/control.h +++ b/arch/arm/plat-omap/include/mach/control.h @@ -238,6 +238,13 @@ #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__ #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \ diff --git a/arch/arm/plat-omap/include/mach/cpu.h b/arch/arm/plat-omap/include/mach/cpu.h index 8d0841b..12b91f7 100644 --- a/arch/arm/plat-omap/include/mach/cpu.h +++ b/arch/arm/plat-omap/include/mach/cpu.h @@ -472,6 +472,7 @@ extern u32 omap3_features; #define OMAP3_HAS_SGX BIT(2) #define OMAP3_HAS_NEON BIT(3) #define OMAP3_HAS_ISP BIT(4) +#define OMAP3_HAS_720MHZ BIT(5) #define OMAP3_HAS_FEATURE(feat,flag) \ static inline unsigned int omap3_has_ ##feat(void) \ @@ -484,5 +485,6 @@ OMAP3_HAS_FEATURE(sgx, SGX) OMAP3_HAS_FEATURE(iva, IVA) OMAP3_HAS_FEATURE(neon, NEON) OMAP3_HAS_FEATURE(isp, ISP) +OMAP3_HAS_FEATURE(720mhz, 720MHZ) #endif -- 1.6.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
