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authorPaul Walmsley <paul@pwsan.com>2009-12-08 16:34:15 -0700
committerpaul <paul@twilight.(none)>2009-12-11 17:00:43 -0700
commit726072e5dd459e3831d1dd4308ba469ff3ded419 (patch)
tree1e79dcd2e26bcb3eb3fd232d30e17a83f0e73c48 /arch/arm/plat-omap
parentb835d0142196466c5ff3695b90cff1e3ea635c8e (diff)
OMAP3 hwmod: Add automatic OCP_SYSCONFIG AUTOIDLE handling
This patch fills in the OCP_SYSCONFIG.AUTOIDLE handling in the OMAP hwmod code. After this patch, the hwmod code will set the module AUTOIDLE bit (generally <module>.OCP_SYSCONFIG.AUTOIDLE) to 1 by default upon enable. If the hwmod flag HWMOD_NO_OCP_AUTOIDLE is set, AUTOIDLE will be set to 0 upon enable. Upon module disable, AUTOIDLE will be set to 1. Enabling module autoidle should save some power. The only reason to not set the OCP_SYSCONFIG.AUTOIDLE bit is if there is a bug in the module RTL, e.g., the MPUINTC block on OMAP3. Comments from Kevin Hilman <khilman@deeprootsystems.com> inspired this patch, and Kevin tested an earlier version of this patch. Signed-off-by: Paul Walmsley <paul@pwsan.com> Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/plat-omap')
-rw-r--r--arch/arm/plat-omap/include/plat/omap_hwmod.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index dbdd123eca1..643a9727de3 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -50,6 +50,8 @@ struct omap_device;
#define SYSC_ENAWAKEUP_MASK (1 << SYSC_ENAWAKEUP_SHIFT)
#define SYSC_SOFTRESET_SHIFT 1
#define SYSC_SOFTRESET_MASK (1 << SYSC_SOFTRESET_SHIFT)
+#define SYSC_AUTOIDLE_SHIFT 0
+#define SYSC_AUTOIDLE_MASK (1 << SYSC_AUTOIDLE_SHIFT)
/* OCP SYSSTATUS bit shifts/masks */
#define SYSS_RESETDONE_SHIFT 0
@@ -294,13 +296,17 @@ struct omap_hwmod_omap4_prcm {
* SDRAM controller, etc.
* HWMOD_INIT_NO_IDLE: don't idle this module at boot - important for SDRAM
* controller, etc.
+ * HWMOD_NO_AUTOIDLE: disable module autoidle (OCP_SYSCONFIG.AUTOIDLE)
+ * when module is enabled, rather than the default, which is to
+ * enable autoidle
* HWMOD_SET_DEFAULT_CLOCKACT: program CLOCKACTIVITY bits at startup
*/
#define HWMOD_SWSUP_SIDLE (1 << 0)
#define HWMOD_SWSUP_MSTANDBY (1 << 1)
#define HWMOD_INIT_NO_RESET (1 << 2)
#define HWMOD_INIT_NO_IDLE (1 << 3)
-#define HWMOD_SET_DEFAULT_CLOCKACT (1 << 4)
+#define HWMOD_NO_OCP_AUTOIDLE (1 << 4)
+#define HWMOD_SET_DEFAULT_CLOCKACT (1 << 5)
/*
* omap_hwmod._int_flags definitions