This patch adds support for new speed enhanced parts with ARM and IVA running at 720MHz and 520MHz respectively. These parts can be probed at run-time by reading PRODID.SKUID[3:0] at 0x4830A20C [1].
This patch specifically does following: * Detect devices capable of 720MHz. * Add new OPP * Ensure that OPP is conditionally enabled. The patch was tested on OMAP3EVM. On 720MHz capable device: # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 720000 On other devices: # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 600000 [1] http://focus.ti.com/lit/ug/spruff1d/spruff1d.pdf Signed-off-by: Sanjeev Premi <[email protected]> --- arch/arm/mach-omap2/control.h | 7 +++++++ arch/arm/mach-omap2/id.c | 10 ++++++++++ arch/arm/mach-omap2/opp3xxx_data.c | 19 ++++++++++++++++++- arch/arm/plat-omap/include/plat/cpu.h | 2 ++ 4 files changed, 37 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h index f0629ae..eebc045 100644 --- a/arch/arm/mach-omap2/control.h +++ b/arch/arm/mach-omap2/control.h @@ -365,6 +365,13 @@ #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__ #ifdef CONFIG_ARCH_OMAP2PLUS 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/mach-omap2/opp3xxx_data.c b/arch/arm/mach-omap2/opp3xxx_data.c index 0486fce..01582b7 100644 --- a/arch/arm/mach-omap2/opp3xxx_data.c +++ b/arch/arm/mach-omap2/opp3xxx_data.c @@ -22,6 +22,9 @@ #include "omap_opp_data.h" +#define INDEX_MPU_720MHZ 5 +#define INDEX_IVA_720MHZ 14 + static struct omap_opp_def __initdata omap34xx_opp_def_list[] = { /* MPU OPP1 */ OPP_INITIALIZER("mpu", true, 125000000, 975000), @@ -33,6 +36,8 @@ static struct omap_opp_def __initdata omap34xx_opp_def_list[] = { OPP_INITIALIZER("mpu", true, 550000000, 1270000), /* MPU OPP5 */ OPP_INITIALIZER("mpu", true, 600000000, 1350000), + /* MPU OPP6 */ + OPP_INITIALIZER("mpu", false, 720000000, 1350000), /* * L3 OPP1 - 41.5 MHz is disabled because: The voltage for that OPP is @@ -58,6 +63,8 @@ static struct omap_opp_def __initdata omap34xx_opp_def_list[] = { OPP_INITIALIZER("iva", true, 400000000, 1270000), /* DSP OPP5 */ OPP_INITIALIZER("iva", true, 430000000, 1350000), + /* DSP OPP6 */ + OPP_INITIALIZER("iva", false, 520000000, 1350000), }; static struct omap_opp_def __initdata omap36xx_opp_def_list[] = { @@ -98,9 +105,19 @@ static int __init omap3_opp_init(void) if (cpu_is_omap3630()) r = omap_init_opp_table(omap36xx_opp_def_list, ARRAY_SIZE(omap36xx_opp_def_list)); - else + else { + if (omap3_has_720mhz()) { + pr_info("Enabled OPP corresponding to 720MHz\n"); + + omap34xx_opp_def_list[INDEX_MPU_720MHZ] + .default_available = true; + omap34xx_opp_def_list[INDEX_IVA_720MHZ] + .default_available = true; + } + r = omap_init_opp_table(omap34xx_opp_def_list, ARRAY_SIZE(omap34xx_opp_def_list)); + } return r; } diff --git a/arch/arm/plat-omap/include/plat/cpu.h b/arch/arm/plat-omap/include/plat/cpu.h index 3fd8b40..5c77987 100644 --- a/arch/arm/plat-omap/include/plat/cpu.h +++ b/arch/arm/plat-omap/include/plat/cpu.h @@ -455,6 +455,7 @@ 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) \ @@ -469,5 +470,6 @@ 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 -- 1.7.2.2 -- 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
