Some HW blocks have errata which requires selective enabling/disabling
of SYSCONFIG bits. In particular, some blocks have known issues with
smart-idle so smart-idle has to be disabled under certain conditions.
Add API to read/write a modules SYSCONFIG register which takes
advantage of the built-in caching of omap_hwmod. Any manual
reading/writing of SYSCONFIG registers outside of hwmod will cause
potential problems in omap_hwmod due to the caching.
RFC: would an API to only touch smart-idle be more appropriate?
Maybe omap_hwmod_smart_idle_enable(oh, bool enable)?
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/omap_hwmod.c | 10 ++++++++++
arch/arm/plat-omap/include/plat/omap_hwmod.h | 3 +++
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index d8c8545..307deea 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -993,6 +993,16 @@ void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs)
__raw_writel(v, oh->_rt_va + reg_offs);
}
+u32 omap_hwmod_read_sysc(struct omap_hwmod *oh)
+{
+ return oh->_sysc_cache;
+}
+
+void omap_hwmod_write_sysc(u32 v, struct omap_hwmod *oh)
+{
+ _write_sysconfig(v, oh);
+}
+
/**
* omap_hwmod_register - register a struct omap_hwmod
* @oh: struct omap_hwmod *
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 007935a..db1e6ef 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -446,6 +446,9 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh);
void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs);
u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs);
+void omap_hwmod_write_sysc(u32 v, struct omap_hwmod *oh);
+u32 omap_hwmod_read_sysc(struct omap_hwmod *oh);
+
int omap_hwmod_count_resources(struct omap_hwmod *oh);
int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res);
--
1.6.6.rc2.1.g42108
--
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