From c02060d869247215c2ea15fd650c333d30f5b210 Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Sun, 10 Feb 2013 11:22:23 -0700 Subject: [PATCH] ARM: OMAP4+: AESS: enable internal auto-gating during initial setup MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Enable the AESS auto-gating control bit during AESS hwmod setup. This fixes the following boot warning on OMAP4: omap_hwmod: aess: _wait_target_disable failed Without this patch, the AESS IP block does not indicate to the PRCM that it is idle after it is reset. This prevents some types of SoC power management until something sets the auto-gating control bit. Signed-off-by: Paul Walmsley Signed-off-by: Sebastien Guiriec Cc: Benoît Cousson Cc: Péter Ujfalusi Cc: Tony Lindgren --- arch/arm/mach-omap2/Makefile | 2 +- arch/arm/mach-omap2/omap_hwmod.h | 6 +++ arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 1 + arch/arm/mach-omap2/omap_hwmod_reset.c | 52 ++++++++++++++++++++++ 4 files changed, 60 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-omap2/omap_hwmod_reset.c diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 947cafe65aef..d88788facf52 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/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 diff --git a/arch/arm/mach-omap2/omap_hwmod.h b/arch/arm/mach-omap2/omap_hwmod.h index 41066b4b7a7b..6ec73cbc30c4 100644 --- a/arch/arm/mach-omap2/omap_hwmod.h +++ b/arch/arm/mach-omap2/omap_hwmod.h @@ -672,6 +672,12 @@ 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 diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c index 793f54ac7d14..c9c251e23147 100644 --- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c +++ b/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 */ diff --git a/arch/arm/mach-omap2/omap_hwmod_reset.c b/arch/arm/mach-omap2/omap_hwmod_reset.c new file mode 100644 index 000000000000..bba43fa627d3 --- /dev/null +++ b/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 + +#include + +#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; +}