7 files changed, 314 insertions, 0 deletions

diff --git a/Documentation/arm/OMAP/omap_pm b/Documentation/arm/OMAP/omap_pm
index 5389440aade3..9012bb039094 100644
--- a/Documentation/arm/OMAP/omap_pm
+++ b/Documentation/arm/OMAP/omap_pm
@@ -127,3 +127,28 @@ implementation needs:
 10. (*pdata->cpu_set_freq)(unsigned long f)
 
 11. (*pdata->cpu_get_freq)(void)
+
+Customizing OPP for platform
+============================
+Defining CONFIG_PM should enable OPP layer for the silicon
+and the registration of OPP table should take place automatically.
+However, in special cases, the default OPP table may need to be
+tweaked, for e.g.:
+ * enable default OPPs which are disabled by default, but which
+   could be enabled on a platform
+ * Disable an unsupported OPP on the platform
+ * Define and add a custom opp table entry
+in these cases, the board file needs to do additional steps as follows:
+arch/arm/mach-omapx/board-xyz.c
+        #include "pm.h"
+        ....
+        static void __init omap_xyz_init_irq(void)
+        {
+                ....
+                /* Initialize the default table */
+                omapx_opp_init();
+                /* Do customization to the defaults */
+                ....
+        }
+NOTE: omapx_opp_init will be omap3_opp_init or as required
+based on the omap family.
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 92b004ba5a10..e752cb397ba7 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -35,6 +35,8 @@ config ARCH_OMAP3
         select CPU_V7
         select USB_ARCH_HAS_EHCI
         select ARM_L1_CACHE_SHIFT_6 if !ARCH_OMAP4
+        select ARCH_HAS_OPP
+        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 b86b06292388..fa16806092e5 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -49,6 +49,12 @@ obj-$(CONFIG_ARCH_OMAP4)		+= mux44xx.o
 obj-$(CONFIG_ARCH_OMAP2)                += sdrc2xxx.o
 # obj-$(CONFIG_ARCH_OMAP3)              += sdrc3xxx.o
 
+# OPP table initialization
+ifeq ($(CONFIG_PM_OPP),y)
+obj-y                                   += opp.o
+obj-$(CONFIG_ARCH_OMAP3)                += opp3xxx_data.o
+endif
+
 # Power Management
 ifeq ($(CONFIG_PM),y)
 obj-$(CONFIG_ARCH_OMAP2)                += pm24xx.o
diff --git a/arch/arm/mach-omap2/omap_opp_data.h b/arch/arm/mach-omap2/omap_opp_data.h
new file mode 100644
index 000000000000..46ac27dd6c84
--- /dev/null
+++ b/arch/arm/mach-omap2/omap_opp_data.h
@@ -0,0 +1,72 @@
+/*
+ * OMAP SoC specific OPP Data helpers
+ *
+ * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/
+ *      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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#ifndef __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H
+#define __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H
+
+#include <plat/omap_hwmod.h>
+
+/*
+ * *BIG FAT WARNING*:
+ * USE the following ONLY in opp data initialization common to an SoC.
+ * DO NOT USE these in board files/pm core etc.
+ */
+
+/**
+ * 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
+ * @default_available:  True/false - is this OPP available 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,                                  \
+}
+
+/* Use this to initialize the default table */
+extern int __init omap_init_opp_table(struct omap_opp_def *opp_def,
+                u32 opp_def_size);
+
+#endif          /* __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H */
diff --git a/arch/arm/mach-omap2/opp.c b/arch/arm/mach-omap2/opp.c
new file mode 100644
index 000000000000..ab8b35b780b5
--- /dev/null
+++ b/arch/arm/mach-omap2/opp.c
@@ -0,0 +1,93 @@
+/*
+ * OMAP SoC specific OPP wrapper function
+ *
+ * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/
+ *      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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/module.h>
+#include <linux/opp.h>
+
+#include <plat/omap_device.h>
+
+#include "omap_opp_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
+ * @opp_def:            opp default list for this silicon
+ * @opp_def_size:       number of opp entries for this silicon
+ *
+ * Register the initial OPP table with the OPP library based on the CPU
+ * type. This is meant to be used only by SoC specific registration.
+ */
+int __init omap_init_opp_table(struct omap_opp_def *opp_def,
+                u32 opp_def_size)
+{
+        int i, r;
+
+        if (!opp_def || !opp_def_size) {
+                pr_err("%s: invalid params!\n", __func__);
+                return -EINVAL;
+        }
+
+        /*
+         * Initialize only if not already initialized even if the previous
+         * call failed, because, no reason we'd succeed again.
+         */
+        if (omap_table_init)
+                return -EEXIST;
+        omap_table_init = 1;
+
+        /* 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.c b/arch/arm/mach-omap2/opp3xxx_data.c
new file mode 100644
index 000000000000..0486fce8a92c
--- /dev/null
+++ b/arch/arm/mach-omap2/opp3xxx_data.c
@@ -0,0 +1,107 @@
+/*
+ * OMAP3 OPP table definitions.
+ *
+ * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/
+ *      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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/module.h>
+
+#include <plat/cpu.h>
+
+#include "omap_opp_data.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),
+};
+
+/**
+ * omap3_opp_init() - initialize omap3 opp table
+ */
+static int __init omap3_opp_init(void)
+{
+        int r = -ENODEV;
+
+        if (!cpu_is_omap34xx())
+                return r;
+
+        if (cpu_is_omap3630())
+                r = omap_init_opp_table(omap36xx_opp_def_list,
+                        ARRAY_SIZE(omap36xx_opp_def_list));
+        else
+                r = omap_init_opp_table(omap34xx_opp_def_list,
+                        ARRAY_SIZE(omap34xx_opp_def_list));
+
+        return r;
+}
+device_initcall(omap3_opp_init);
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 0d75bfd1fdbe..2031f157a6ee 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -20,6 +20,15 @@ extern int omap3_can_sleep(void);
 extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state);
 extern int omap3_idle_init(void);
 
+#if defined(CONFIG_PM_OPP)
+extern int omap3_opp_init(void);
+#else
+static inline int omap3_opp_init(void)
+{
+        return -EINVAL;
+}
+#endif
+
 struct cpuidle_params {
         u8  valid;
         u32 sleep_latency;