diff options
| author | Rajendra Nayak <rnayak@ti.com> | 2010-10-08 10:23:22 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-10-08 10:23:22 -0700 |
| commit | cc7a1d2a540a780066aa562c651a88dd28b6fc8a (patch) | |
| tree | bd9fba3d4d4ccb2a0277b383c190d1c898440961 /arch/arm/mach-omap2/omap_hwmod.c | |
| parent | c710e19222794f45f2376ba6f00dc675dc4279d6 (diff) | |
omap: hwmod: Handle modules with 16bit registers
Some modules which have 16bit registers can cause imprecise
aborts if a __raw_readl/writel is used to read/write 32 bits.
Add an additional flag to identify modules which have such
hard requirement, and handle it in the hwmod framework.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 955861acc0c..5a30658444d 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -184,7 +184,7 @@ static int _update_sysc_cache(struct omap_hwmod *oh) /* XXX ensure module interface clock is up */ - oh->_sysc_cache = omap_hwmod_readl(oh, oh->class->sysc->sysc_offs); + oh->_sysc_cache = omap_hwmod_read(oh, oh->class->sysc->sysc_offs); if (!(oh->class->sysc->sysc_flags & SYSC_NO_CACHE)) oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED; @@ -211,7 +211,7 @@ static void _write_sysconfig(u32 v, struct omap_hwmod *oh) if (oh->_sysc_cache != v) { oh->_sysc_cache = v; - omap_hwmod_writel(v, oh, oh->class->sysc->sysc_offs); + omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs); } } @@ -1133,12 +1133,12 @@ static int _reset(struct omap_hwmod *oh) _write_sysconfig(v, oh); if (oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS) - omap_test_timeout((omap_hwmod_readl(oh, + omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs) & SYSS_RESETDONE_MASK), MAX_MODULE_SOFTRESET_WAIT, c); else if (oh->class->sysc->sysc_flags & SYSC_HAS_RESET_STATUS) - omap_test_timeout(!(omap_hwmod_readl(oh, + omap_test_timeout(!(omap_hwmod_read(oh, oh->class->sysc->sysc_offs) & SYSC_TYPE2_SOFTRESET_MASK), MAX_MODULE_SOFTRESET_WAIT, c); @@ -1378,14 +1378,20 @@ static int _setup(struct omap_hwmod *oh, void *data) /* Public functions */ -u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs) +u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs) { - return __raw_readl(oh->_mpu_rt_va + reg_offs); + if (oh->flags & HWMOD_16BIT_REG) + return __raw_readw(oh->_mpu_rt_va + reg_offs); + else + return __raw_readl(oh->_mpu_rt_va + reg_offs); } -void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs) +void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs) { - __raw_writel(v, oh->_mpu_rt_va + reg_offs); + if (oh->flags & HWMOD_16BIT_REG) + __raw_writew(v, oh->_mpu_rt_va + reg_offs); + else + __raw_writel(v, oh->_mpu_rt_va + reg_offs); } /** @@ -1732,7 +1738,7 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) * Forces posted writes to complete on the OCP thread handling * register writes */ - omap_hwmod_readl(oh, oh->class->sysc->sysc_offs); + omap_hwmod_read(oh, oh->class->sysc->sysc_offs); } /** |