omap4 pm changes via Paul Walmsley <paul@pwsan.com>:

Some OMAP4 power management fixes and audio device integration
 patches.  This pull request contains a fix for an issue discovered during
 branch integration.
 
 Basic test logs are available at:
 
     http://www.pwsan.com/omap/testlogs/omap4_prcm_devel_a_3.9/20130210112717/
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Merge tag 'omap-for-v3.9/pm-omap4-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into late/omap

From Tony Lindgren:
omap4 pm changes via Paul Walmsley <paul@pwsan.com>:

Some OMAP4 power management fixes and audio device integration
patches.  This pull request contains a fix for an issue discovered during
branch integration.

Basic test logs are available at:

    http://www.pwsan.com/omap/testlogs/omap4_prcm_devel_a_3.9/20130210112717/

* tag 'omap-for-v3.9/pm-omap4-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP4: hwmod data: Enable AESS hwmod device
  ARM: OMAP4: hwmod data: Update AESS data with memory bank area
  ARM: OMAP4+: AESS: enable internal auto-gating during initial setup
  ASoC: TI AESS: add autogating-enable function, callable from architecture code
  ARM: OMAP2+: hwmod: add enable_preprogram hook
  ARM: OMAP2+: PM: Fix the dt return condition in pm_late_init()
  ARM: OMAP4: PM: Warn users about usage of older bootloaders

arch/arm/mach-omap2/Makefile

@@ -8,7 +8,7 @@ obj-y := id.o io.o control.o mux.o devices.o fb.o serial.o gpmc.o timer.o pm.o \
 	 omap_device.o sram.o
 
 omap-2-3-common				= irq.o
-hwmod-common				= omap_hwmod.o \
+hwmod-common				= omap_hwmod.o omap_hwmod_reset.o \
 					  omap_hwmod_common_data.o
 clock-common				= clock.o clock_common_data.o \
 					  clkt_dpll.o clkt_clksel.o

arch/arm/mach-omap2/omap_hwmod.c

@@ -2054,6 +2054,23 @@ static int _omap4_get_context_lost(struct omap_hwmod *oh)
 	return oh->prcm.omap4.context_lost_counter;
 }
 
+/**
+ * _enable_preprogram - Pre-program an IP block during the _enable() process
+ * @oh: struct omap_hwmod *
+ *
+ * Some IP blocks (such as AESS) require some additional programming
+ * after enable before they can enter idle.  If a function pointer to
+ * do so is present in the hwmod data, then call it and pass along the
+ * return value; otherwise, return 0.
+ */
+static int __init _enable_preprogram(struct omap_hwmod *oh)
+{
+	if (!oh->class->enable_preprogram)
+		return 0;
+
+	return oh->class->enable_preprogram(oh);
+}
+
 /**
  * _enable - enable an omap_hwmod
  * @oh: struct omap_hwmod *
@@ -2160,6 +2177,7 @@ static int _enable(struct omap_hwmod *oh)
 				_update_sysc_cache(oh);
 			_enable_sysc(oh);
 		}
+		r = _enable_preprogram(oh);
 	} else {
 		if (soc_ops.disable_module)
 			soc_ops.disable_module(oh);

arch/arm/mach-omap2/omap_hwmod.h

@@ -510,6 +510,7 @@ struct omap_hwmod_omap4_prcm {
  * @rev: revision of the IP class
  * @pre_shutdown: ptr to fn to be executed immediately prior to device shutdown
  * @reset: ptr to fn to be executed in place of the standard hwmod reset fn
+ * @enable_preprogram:  ptr to fn to be executed during device enable
  *
  * Represent the class of a OMAP hardware "modules" (e.g. timer,
  * smartreflex, gpio, uart...)
@@ -533,6 +534,7 @@ struct omap_hwmod_class {
 	u32					rev;
 	int					(*pre_shutdown)(struct omap_hwmod *oh);
 	int					(*reset)(struct omap_hwmod *oh);
+	int					(*enable_preprogram)(struct omap_hwmod *oh);
 };
 
 /**
@@ -679,6 +681,12 @@ extern void __init omap_hwmod_init(void);
 
 const char *omap_hwmod_get_main_clk(struct omap_hwmod *oh);
 
+/*
+ *
+ */
+
+extern int omap_hwmod_aess_preprogram(struct omap_hwmod *oh);
+
 /*
  * Chip variant-specific hwmod init routines - XXX should be converted
  * to use initcalls once the initial boot ordering is straightened out

arch/arm/mach-omap2/omap_hwmod_44xx_data.c

@@ -322,6 +322,7 @@ static struct omap_hwmod_class_sysconfig omap44xx_aess_sysc = {
 static struct omap_hwmod_class omap44xx_aess_hwmod_class = {
 	.name	= "aess",
 	.sysc	= &omap44xx_aess_sysc,
+	.enable_preprogram = omap_hwmod_aess_preprogram,
 };
 
 /* aess */
@@ -348,7 +349,7 @@ static struct omap_hwmod omap44xx_aess_hwmod = {
 	.clkdm_name	= "abe_clkdm",
 	.mpu_irqs	= omap44xx_aess_irqs,
 	.sdma_reqs	= omap44xx_aess_sdma_reqs,
-	.main_clk	= "aess_fck",
+	.main_clk	= "aess_fclk",
 	.prcm = {
 		.omap4 = {
 			.clkctrl_offs = OMAP4_CM1_ABE_AESS_CLKCTRL_OFFSET,
@@ -4248,6 +4249,27 @@ static struct omap_hwmod_ocp_if omap44xx_l4_cfg__ocp_wp_noc = {
 
 static struct omap_hwmod_addr_space omap44xx_aess_addrs[] = {
 	{
+		.name		= "dmem",
+		.pa_start	= 0x40180000,
+		.pa_end		= 0x4018ffff
+	},
+	{
+		.name		= "cmem",
+		.pa_start	= 0x401a0000,
+		.pa_end		= 0x401a1fff
+	},
+	{
+		.name		= "smem",
+		.pa_start	= 0x401c0000,
+		.pa_end		= 0x401c5fff
+	},
+	{
+		.name		= "pmem",
+		.pa_start	= 0x401e0000,
+		.pa_end		= 0x401e1fff
+	},
+	{
+		.name		= "mpu",
 		.pa_start	= 0x401f1000,
 		.pa_end		= 0x401f13ff,
 		.flags		= ADDR_TYPE_RT
@@ -4266,6 +4288,27 @@ static struct omap_hwmod_ocp_if __maybe_unused omap44xx_l4_abe__aess = {
 
 static struct omap_hwmod_addr_space omap44xx_aess_dma_addrs[] = {
 	{
+		.name		= "dmem_dma",
+		.pa_start	= 0x49080000,
+		.pa_end		= 0x4908ffff
+	},
+	{
+		.name		= "cmem_dma",
+		.pa_start	= 0x490a0000,
+		.pa_end		= 0x490a1fff
+	},
+	{
+		.name		= "smem_dma",
+		.pa_start	= 0x490c0000,
+		.pa_end		= 0x490c5fff
+	},
+	{
+		.name		= "pmem_dma",
+		.pa_start	= 0x490e0000,
+		.pa_end		= 0x490e1fff
+	},
+	{
+		.name		= "dma",
 		.pa_start	= 0x490f1000,
 		.pa_end		= 0x490f13ff,
 		.flags		= ADDR_TYPE_RT
@@ -6281,7 +6324,7 @@ static struct omap_hwmod_ocp_if *omap44xx_hwmod_ocp_ifs[] __initdata = {
 	&omap44xx_l3_main_1__l3_main_3,
 	&omap44xx_l3_main_2__l3_main_3,
 	&omap44xx_l4_cfg__l3_main_3,
-	/* &omap44xx_aess__l4_abe, */
+	&omap44xx_aess__l4_abe,
 	&omap44xx_dsp__l4_abe,
 	&omap44xx_l3_main_1__l4_abe,
 	&omap44xx_mpu__l4_abe,
@@ -6290,8 +6333,8 @@ static struct omap_hwmod_ocp_if *omap44xx_hwmod_ocp_ifs[] __initdata = {
 	&omap44xx_l4_cfg__l4_wkup,
 	&omap44xx_mpu__mpu_private,
 	&omap44xx_l4_cfg__ocp_wp_noc,
-	/* &omap44xx_l4_abe__aess, */
+	&omap44xx_l4_abe__aess,
-	/* &omap44xx_l4_abe__aess_dma, */
+	&omap44xx_l4_abe__aess_dma,
 	&omap44xx_l3_main_2__c2c,
 	&omap44xx_l4_wkup__counter_32k,
 	&omap44xx_l4_cfg__ctrl_module_core,

arch/arm/mach-omap2/omap_hwmod_reset.c

@@ -0,0 +1,52 @@
+/*
+ * OMAP IP block custom reset and preprogramming stubs
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ * Paul Walmsley
+ *
+ * A small number of IP blocks need custom reset and preprogramming
+ * functions.  The stubs in this file provide a standard way for the
+ * hwmod code to call these functions, which are to be located under
+ * drivers/.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+#include <linux/kernel.h>
+
+#include <sound/aess.h>
+
+#include "omap_hwmod.h"
+
+/**
+ * omap_hwmod_aess_preprogram - enable AESS internal autogating
+ * @oh: struct omap_hwmod *
+ *
+ * The AESS will not IdleAck to the PRCM until its internal autogating
+ * is enabled.  Since internal autogating is disabled by default after
+ * AESS reset, we must enable autogating after the hwmod code resets
+ * the AESS.  Returns 0.
+ */
+int omap_hwmod_aess_preprogram(struct omap_hwmod *oh)
+{
+	void __iomem *va;
+
+	va = omap_hwmod_get_mpu_rt_va(oh);
+	if (!va)
+		return -EINVAL;
+
+	aess_enable_autogating(va);
+
+	return 0;
+}

arch/arm/mach-omap2/pm.c

@@ -282,19 +282,19 @@ int __init omap2_common_pm_late_init(void)
 	 * a completely different mechanism.
 	 * Disable this part if a DT blob is available.
 	 */
-	if (of_have_populated_dt())
+	if (!of_have_populated_dt()) {
-		return 0;
 
-	/* Init the voltage layer */
+		/* Init the voltage layer */
-	omap_pmic_late_init();
+		omap_pmic_late_init();
-	omap_voltage_late_init();
+		omap_voltage_late_init();
 
-	/* Initialize the voltages */
+		/* Initialize the voltages */
-	omap3_init_voltages();
+		omap3_init_voltages();
-	omap4_init_voltages();
+		omap4_init_voltages();
 
-	/* Smartreflex device init */
+		/* Smartreflex device init */
-	omap_devinit_smartreflex();
+		omap_devinit_smartreflex();
+	}
 
 #ifdef CONFIG_SUSPEND
 	suspend_set_ops(&omap_pm_ops);

arch/arm/mach-omap2/pm44xx.c

@@ -77,10 +77,20 @@ static int omap4_pm_suspend(void)
 		omap_set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);
 		pwrdm_set_logic_retst(pwrst->pwrdm, pwrst->saved_logic_state);
 	}
-	if (ret)
+	if (ret) {
 		pr_crit("Could not enter target state in pm_suspend\n");
-	else
+		/*
+		 * OMAP4 chip PM currently works only with certain (newer)
+		 * versions of bootloaders. This is due to missing code in the
+		 * kernel to properly reset and initialize some devices.
+		 * Warn the user about the bootloader version being one of the
+		 * possible causes.
+		 * http://www.spinics.net/lists/arm-kernel/msg218641.html
+		 */
+		pr_warn("A possible cause could be an old bootloader - try u-boot >= v2012.07\n");
+	} else {
 		pr_info("Successfully put all powerdomains to target state\n");
+	}
 
 	return 0;
 }
@@ -146,6 +156,13 @@ int __init omap4_pm_init(void)
 	}
 
 	pr_err("Power Management for TI OMAP4.\n");
+	/*
+	 * OMAP4 chip PM currently works only with certain (newer)
+	 * versions of bootloaders. This is due to missing code in the
+	 * kernel to properly reset and initialize some devices.
+	 * http://www.spinics.net/lists/arm-kernel/msg218641.html
+	 */
+	pr_warn("OMAP4 PM: u-boot >= v2012.07 is required for full PM support\n");
 
 	ret = pwrdm_for_each(pwrdms_setup, NULL);
 	if (ret) {

include/sound/aess.h

@@ -0,0 +1,53 @@
+/*
+ * AESS IP block reset
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+#ifndef __SOUND_AESS_H__
+#define __SOUND_AESS_H__
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+
+/*
+ * AESS_AUTO_GATING_ENABLE_OFFSET: offset in bytes of the AESS IP
+ *     block's AESS_AUTO_GATING_ENABLE__1 register from the IP block's
+ *     base address
+ */
+#define AESS_AUTO_GATING_ENABLE_OFFSET			0x07c
+
+/* Register bitfields in the AESS_AUTO_GATING_ENABLE__1 register */
+#define AESS_AUTO_GATING_ENABLE_SHIFT			0
+
+/**
+ * aess_enable_autogating - enable AESS internal autogating
+ * @oh: struct omap_hwmod *
+ *
+ * Enable internal autogating on the AESS.  This allows the AESS to
+ * indicate that it is idle to the OMAP PRCM.  Returns 0.
+ */
+static inline void aess_enable_autogating(void __iomem *base)
+{
+	u32 v;
+
+	/* Set AESS_AUTO_GATING_ENABLE__1.ENABLE to allow idle entry */
+	v = 1 << AESS_AUTO_GATING_ENABLE_SHIFT;
+	writel(v, base + AESS_AUTO_GATING_ENABLE_OFFSET);
+}
+
+#endif /* __SOUND_AESS_H__ */