Add OPP data for OMAP34xx and OMAP36xx and initialization functions to populate OPP tables based on current SoC. introduce an OMAP generic opp initialization routine which OMAP3 and OMAP4+ SoCs can use to register their OPP definitions.
Signed-off-by: Nishanth Menon <[email protected]> Signed-off-by: Kevin Hilman <[email protected]> --- arch/arm/mach-omap2/Kconfig | 1 + arch/arm/mach-omap2/Makefile | 2 + arch/arm/mach-omap2/opp.c | 138 ++++++++++++++++++++++++++++++++++++ arch/arm/mach-omap2/opp3xxx_data.h | 82 +++++++++++++++++++++ arch/arm/mach-omap2/pm.h | 8 ++ 5 files changed, 231 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-omap2/opp.c create mode 100644 arch/arm/mach-omap2/opp3xxx_data.h diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index b48bacf..3eb367a 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -36,6 +36,7 @@ config ARCH_OMAP3 select CPU_V7 select USB_ARCH_HAS_EHCI select ARM_L1_CACHE_SHIFT_6 + select PM_OPP if PM config ARCH_OMAP4 bool "TI OMAP4" diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 88d3a1e..dc5ad90 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -59,6 +59,8 @@ AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a endif +obj-$(CONFIG_PM_OPP) += opp.o + # PRCM obj-$(CONFIG_ARCH_OMAP2) += cm.o obj-$(CONFIG_ARCH_OMAP3) += cm.o diff --git a/arch/arm/mach-omap2/opp.c b/arch/arm/mach-omap2/opp.c new file mode 100644 index 0000000..9342986 --- /dev/null +++ b/arch/arm/mach-omap2/opp.c @@ -0,0 +1,138 @@ +/* + * OMAP SoC specific OPP wrapper function + * + * Copyright (C) 2009 - 2010 Texas Instruments Incorporated. + * Nishanth Menon + * Copyright (C) 2009 - 2010 Deep Root Systems, LLC. + * Kevin Hilman + * Copyright (C) 2010 Nokia Corporation. + * Eduardo Valentin + * + * 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/err.h> +#include <linux/opp.h> + +#include <plat/cpu.h> +#include <plat/omap_device.h> + +#include "pm.h" + +/** + * struct omap_opp_def - OMAP OPP Definition + * @hwmod_name: Name of the hwmod for this domain + * @freq: Frequency in hertz corresponding to this OPP + * @u_volt: Nominal voltage in microvolts corresponding to this OPP + * @enabled: True/false - is this OPP enabled/disabled by default + * + * OMAP SOCs have a standard set of tuples consisting of frequency and voltage + * pairs that the device will support per voltage domain. This is called + * Operating Points or OPP. The actual definitions of OMAP Operating Points + * varies over silicon within the same family of devices. For a specific + * domain, you can have a set of {frequency, voltage} pairs and this is denoted + * by an array of omap_opp_def. As the kernel boots and more information is + * available, a set of these are activated based on the precise nature of + * device the kernel boots up on. It is interesting to remember that each IP + * which belongs to a voltage domain may define their own set of OPPs on top + * of this - but this is handled by the appropriate driver. + */ +struct omap_opp_def { + char *hwmod_name; + + unsigned long freq; + unsigned long u_volt; + + bool default_available; +}; + +/* + * Initialization wrapper used to define an OPP for OMAP variants. + */ +#define OPP_INITIALIZER(_hwmod_name, _enabled, _freq, _uv) \ +{ \ + .hwmod_name = _hwmod_name, \ + .default_available = _enabled, \ + .freq = _freq, \ + .u_volt = _uv, \ +} + +#include "opp3xxx_data.h" + +/* Temp variable to allow multiple calls */ +static u8 __initdata omap_table_init; + +/** + * omap_init_opp_table() - Initialize opp table as per the CPU type + * + * Register the initial OPP table with the OPP library based on the CPU + * type. + */ +int __init omap_init_opp_table(void) +{ + struct omap_opp_def *opp_def; + u32 opp_def_size; + int i, r; + + /* + * Allow multiple calls, but initialize only if not already initalized + * even if the previous call failed, coz, no reason we'd succeed again + */ + if (omap_table_init) + return 0; + omap_table_init = 1; + + /* Select the OPP table we'd like to enable based on cpu we are on */ + if (cpu_is_omap34xx()) { + opp_def = cpu_is_omap3630() ? omap36xx_opp_def_list : + omap34xx_opp_def_list; + opp_def_size = cpu_is_omap3630() ? + ARRAY_SIZE(omap36xx_opp_def_list) : + ARRAY_SIZE(omap34xx_opp_def_list); + } else { + pr_err("%s: called for an unsupported cpu type\n", __func__); + return -EINVAL; + } + + /* Lets now register with OPP library */ + for (i = 0; i < opp_def_size; i++) { + struct omap_hwmod *oh; + struct device *dev; + + if (!opp_def->hwmod_name) { + pr_err("%s: NULL name of omap_hwmod, failing [%d].\n", + __func__, i); + return -EINVAL; + } + oh = omap_hwmod_lookup(opp_def->hwmod_name); + if (!oh || !oh->od) { + pr_warn("%s: no hwmod or odev for %s, [%d] " + "cannot add OPPs.\n", __func__, + opp_def->hwmod_name, i); + return -EINVAL; + } + dev = &oh->od->pdev.dev; + + r = opp_add(dev, opp_def->freq, opp_def->u_volt); + if (r) { + dev_err(dev, "%s: add OPP %ld failed for %s [%d] " + "result=%d\n", + __func__, opp_def->freq, + opp_def->hwmod_name, i, r); + } else { + if (!opp_def->default_available) + r = opp_disable(dev, opp_def->freq); + if (r) + dev_err(dev, "%s: disable %ld failed for %s " + "[%d] result=%d\n", + __func__, opp_def->freq, + opp_def->hwmod_name, i, r); + } + opp_def++; + } + + return 0; +} diff --git a/arch/arm/mach-omap2/opp3xxx_data.h b/arch/arm/mach-omap2/opp3xxx_data.h new file mode 100644 index 0000000..2ce36a2 --- /dev/null +++ b/arch/arm/mach-omap2/opp3xxx_data.h @@ -0,0 +1,82 @@ +/* + * OMAP3 OPP table definitions. + * + * Copyright (C) 2009 - 2010 Texas Instruments Incorporated. + * Nishanth Menon + * Kevin Hilman + * Copyright (C) 2010 Nokia Corporation. + * Eduardo Valentin + * + * 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. + */ + +#ifndef __ASM_PLAT_OPP_OMAP3XXX_H__ +#define __ASM_PLAT_OPP_OMAP3XXX_H__ + +static struct omap_opp_def __initdata omap34xx_opp_def_list[] = { + /* MPU OPP1 */ + OPP_INITIALIZER("mpu", true, 125000000, 975000), + /* MPU OPP2 */ + OPP_INITIALIZER("mpu", true, 250000000, 1075000), + /* MPU OPP3 */ + OPP_INITIALIZER("mpu", true, 500000000, 1200000), + /* MPU OPP4 */ + OPP_INITIALIZER("mpu", true, 550000000, 1270000), + /* MPU OPP5 */ + OPP_INITIALIZER("mpu", true, 600000000, 1350000), + + /* + * L3 OPP1 - 41.5 MHz is disabled because: The voltage for that OPP is + * almost the same than the one at 83MHz thus providing very little + * gain for the power point of view. In term of energy it will even + * increase the consumption due to the very negative performance + * impact that frequency will do to the MPU and the whole system in + * general. + */ + OPP_INITIALIZER("l3_main", false, 41500000, 975000), + /* L3 OPP2 */ + OPP_INITIALIZER("l3_main", true, 83000000, 1050000), + /* L3 OPP3 */ + OPP_INITIALIZER("l3_main", true, 166000000, 1150000), + + + /* DSP OPP1 */ + OPP_INITIALIZER("iva", true, 90000000, 975000), + /* DSP OPP2 */ + OPP_INITIALIZER("iva", true, 180000000, 1075000), + /* DSP OPP3 */ + OPP_INITIALIZER("iva", true, 360000000, 1200000), + /* DSP OPP4 */ + OPP_INITIALIZER("iva", true, 400000000, 1270000), + /* DSP OPP5 */ + OPP_INITIALIZER("iva", true, 430000000, 1350000), +}; + +static struct omap_opp_def __initdata omap36xx_opp_def_list[] = { + /* MPU OPP1 - OPP50 */ + OPP_INITIALIZER("mpu", true, 300000000, 1012500), + /* MPU OPP2 - OPP100 */ + OPP_INITIALIZER("mpu", true, 600000000, 1200000), + /* MPU OPP3 - OPP-Turbo */ + OPP_INITIALIZER("mpu", false, 800000000, 1325000), + /* MPU OPP4 - OPP-SB */ + OPP_INITIALIZER("mpu", false, 1000000000, 1375000), + + /* L3 OPP1 - OPP50 */ + OPP_INITIALIZER("l3_main", true, 100000000, 1000000), + /* L3 OPP2 - OPP100, OPP-Turbo, OPP-SB */ + OPP_INITIALIZER("l3_main", true, 200000000, 1200000), + + /* DSP OPP1 - OPP50 */ + OPP_INITIALIZER("iva", true, 260000000, 1012500), + /* DSP OPP2 - OPP100 */ + OPP_INITIALIZER("iva", true, 520000000, 1200000), + /* DSP OPP3 - OPP-Turbo */ + OPP_INITIALIZER("iva", false, 660000000, 1325000), + /* DSP OPP4 - OPP-SB */ + OPP_INITIALIZER("iva", false, 800000000, 1375000), +}; + +#endif /* __ASM_PLAT_OPP_OMAP3XXX_H__ */ diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 3de6ece..6f3df29 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -22,6 +22,14 @@ extern void omap_sram_idle(void); extern int omap3_can_sleep(void); extern int set_pwrdm_state(struct powerdomain *pwrdm, u32 state); extern int omap3_idle_init(void); +#if defined(CONFIG_PM_OPP) +extern int omap_init_opp_table(void); +#else +static inline int omap_init_opp_table(void) +{ + return -EINVAL; +} +#endif struct cpuidle_params { u8 valid; -- 1.6.3.3 -- 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
