diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 8c27923..5027879b 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -967,6 +967,12 @@ static int _read_hardreset(struct omap_hwmod *oh, const char *name) * enabled for this to work. Returns -EINVAL if the hwmod cannot be * reset this way or if the hwmod is in the wrong state, -ETIMEDOUT if * the module did not reset in time, or 0 upon success. + * + * In OMAP3 a specific SYSSTATUS register is used to get the reset status. + * Starting in OMAP4, some IPs does not have SYSSTATUS register and instead + * use the SYSCONFIG softreset bit to provide the status. + * + * Note that some IP like McBSP does have a reset control but no reset status. */ static int _reset(struct omap_hwmod *oh) { @@ -974,8 +980,7 @@ static int _reset(struct omap_hwmod *oh) int c = 0; if (!oh->class->sysc || - !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET) || - (oh->class->sysc->sysc_flags & SYSS_MISSING)) + !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET)) return -EINVAL; /* clocks must be on for this operation */ @@ -993,9 +998,16 @@ static int _reset(struct omap_hwmod *oh) return r; _write_sysconfig(v, oh); - omap_test_timeout((omap_hwmod_readl(oh, oh->class->sysc->syss_offs) & - SYSS_RESETDONE_MASK), - MAX_MODULE_SOFTRESET_WAIT, c); + if (oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS) + omap_test_timeout((omap_hwmod_readl(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, + oh->class->sysc->sysc_offs) + & SYSC_TYPE2_SOFTRESET_MASK), + MAX_MODULE_SOFTRESET_WAIT, c); if (c == MAX_MODULE_SOFTRESET_WAIT) pr_warning("omap_hwmod: %s: softreset failed (waited %d usec)\n", |
