diff options
Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap/dvfs/0020-omap3-Add-basic-support-for-720MHz-part.patch')
| -rw-r--r-- | extras/recipes-kernel/linux/linux-omap/dvfs/0020-omap3-Add-basic-support-for-720MHz-part.patch | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap/dvfs/0020-omap3-Add-basic-support-for-720MHz-part.patch b/extras/recipes-kernel/linux/linux-omap/dvfs/0020-omap3-Add-basic-support-for-720MHz-part.patch new file mode 100644 index 00000000..107e1162 --- /dev/null +++ b/extras/recipes-kernel/linux/linux-omap/dvfs/0020-omap3-Add-basic-support-for-720MHz-part.patch @@ -0,0 +1,202 @@ +From bb655c594a2f77b17d0747116795f46e00d5ffcb Mon Sep 17 00:00:00 2001 +From: Sanjeev Premi <premi@ti.com> +Date: Tue, 18 Jan 2011 13:19:55 +0530 +Subject: [PATCH 20/20] omap3: Add basic support for 720MHz part + +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. + * Check for presence of IVA before attempting to enable + the corresponding OPP. + + [1] http://focus.ti.com/lit/ug/spruff1d/spruff1d.pdf + +Signed-off-by: Sanjeev Premi <premi@ti.com> +--- + arch/arm/mach-omap2/control.h | 7 ++++ + arch/arm/mach-omap2/id.c | 10 +++++ + arch/arm/mach-omap2/opp3xxx_data.c | 63 ++++++++++++++++++++++++++++++++- + arch/arm/plat-omap/include/plat/cpu.h | 2 + + 4 files changed, 81 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 fd3a1af..76d26c7 100644 +--- a/arch/arm/mach-omap2/opp3xxx_data.c ++++ b/arch/arm/mach-omap2/opp3xxx_data.c +@@ -17,8 +17,10 @@ + * GNU General Public License for more details. + */ + #include <linux/module.h> ++#include <linux/opp.h> + + #include <plat/cpu.h> ++#include <plat/omap_device.h> + + #include "omap_opp_data.h" + #include "pm.h" +@@ -34,6 +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 +@@ -59,6 +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[] = { +@@ -86,6 +92,57 @@ static struct omap_opp_def __initdata omap36xx_opp_def_list[] = { + OPP_INITIALIZER("iva", false, 800000000, 1375000), + }; + ++ ++/** ++ * omap3_opp_enable_720Mhz() - Enable the OPP corresponding to 720MHz ++ * ++ * This function would be executed only if the silicon is capable of ++ * running at the 720MHz. ++ */ ++static int __init omap3_opp_enable_720Mhz(void) ++{ ++ int r = -ENODEV; ++ struct omap_hwmod *oh_mpu = omap_hwmod_lookup("mpu"); ++ struct omap_hwmod *oh_iva; ++ struct platform_device *pdev; ++ ++ if (!oh_mpu || !oh_mpu->od) { ++ goto err; ++ } else { ++ pdev = &oh_mpu->od->pdev; ++ ++ r = opp_enable(&pdev->dev, 720000000); ++ if (r < 0) { ++ dev_err(&pdev->dev, ++ "opp_enable() failed for mpu@720MHz"); ++ goto err; ++ } ++ } ++ ++ if (omap3_has_iva()) { ++ oh_iva = omap_hwmod_lookup("iva"); ++ ++ if (!oh_iva || !oh_iva->od) { ++ r = -ENODEV; ++ goto err; ++ } else { ++ pdev = &oh_iva->od->pdev; ++ ++ r = opp_enable(&pdev->dev, 520000000); ++ if (r < 0) { ++ dev_err(&pdev->dev, ++ "opp_enable() failed for iva@520MHz"); ++ goto err; ++ } ++ } ++ } ++ ++ dev_info(&pdev->dev, "Enabled OPP corresponding to 720MHz\n"); ++ ++err: ++ return r; ++} ++ + /** + * omap3_opp_init() - initialize omap3 opp table + */ +@@ -99,10 +156,14 @@ 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 { + r = omap_init_opp_table(omap34xx_opp_def_list, + ARRAY_SIZE(omap34xx_opp_def_list)); + ++ if (omap3_has_720mhz()) ++ r = omap3_opp_enable_720Mhz(); ++ } ++ + return r; + } + device_initcall(omap3_opp_init); +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 + |