Merge branch 'pm-opp' of ssh://master.kernel.org/pub/scm/linux/kernel…

…/git/khilman/linux-omap-pm into omap-for-linus

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.

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"
@@ -44,6 +46,8 @@ config ARCH_OMAP4
 	select ARM_GIC
 	select PL310_ERRATA_588369
 	select ARM_ERRATA_720789
+	select ARCH_HAS_OPP
+	select PM_OPP if PM
 
 comment "OMAP Core Type"
 	depends on ARCH_OMAP2

arch/arm/mach-omap2/Makefile

@@ -49,6 +49,13 @@ 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
+obj-$(CONFIG_ARCH_OMAP4)		+= opp4xxx_data.o
+endif
+
 # Power Management
 ifeq ($(CONFIG_PM),y)
 obj-$(CONFIG_ARCH_OMAP2)		+= pm24xx.o

arch/arm/mach-omap2/io.c

@@ -347,8 +347,7 @@ void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
 	else if (cpu_is_omap44xx())
 		omap44xx_hwmod_init();
 
-	/* The OPP tables have to be registered before a clk init */
-	omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
+	omap_pm_if_early_init();
 
 	if (cpu_is_omap2420())
 		omap2420_clk_init();

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 */

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;
+}

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);