[PATCH 05/13] ARM: OMAP2+: hwmod: Introduce a flag to deassert the HW reset line
From: Andre Heider <hidden>
Date: 2014-06-29 16:21:39
Also in:
linux-arm-kernel, linux-omap
Subsystem:
arm port, omap hwmod support, omap2+ support, the rest · Maintainers:
Russell King, Paul Walmsley, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
hwmod's hardreset lines are not deasserted after a reset. Add the HWMOD_INIT_DEASSERT_HARD_RESET flag to deassert those after a successful reset. This is required to get the PRU-ICSS in a usable state on am33xx SoCs. Signed-off-by: Andre Heider <redacted> --- arch/arm/mach-omap2/omap_hwmod.c | 2 ++ arch/arm/mach-omap2/omap_hwmod.h | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index f7bb435..1e56b65 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c@@ -2622,6 +2622,8 @@ static int __init _setup_reset(struct omap_hwmod *oh) if (!(oh->flags & HWMOD_INIT_NO_RESET)) r = _reset(oh); + if (!r && oh->flags & HWMOD_INIT_DEASSERT_HARD_RESET) + r = _deassert_hardreset(oh, oh->name); return r; }
diff --git a/arch/arm/mach-omap2/omap_hwmod.h b/arch/arm/mach-omap2/omap_hwmod.h
index 0f97d63..c41d44d 100644
--- a/arch/arm/mach-omap2/omap_hwmod.h
+++ b/arch/arm/mach-omap2/omap_hwmod.h@@ -514,6 +514,7 @@ struct omap_hwmod_omap4_prcm { * HWMOD_SWSUP_SIDLE_ACT: omap_hwmod code should manually bring the module * out of idle, but rely on smart-idle to the put it back in idle, * so the wakeups are still functional (Only known case for now is UART) + * HWMOD_INIT_DEASSERT_HARD_RESET: deassert the HW reset line at boot */ #define HWMOD_SWSUP_SIDLE (1 << 0) #define HWMOD_SWSUP_MSTANDBY (1 << 1)
@@ -528,6 +529,7 @@ struct omap_hwmod_omap4_prcm { #define HWMOD_BLOCK_WFI (1 << 10) #define HWMOD_FORCE_MSTANDBY (1 << 11) #define HWMOD_SWSUP_SIDLE_ACT (1 << 12) +#define HWMOD_INIT_DEASSERT_HARD_RESET (1 << 13) /* * omap_hwmod._int_flags definitions
--
2.0.0
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