diff options
| author | Benoit Cousson <b-cousson@ti.com> | 2010-09-21 18:57:58 +0200 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2010-09-21 15:28:30 -0600 |
| commit | 96835af970e5d6aeedf868e53590a947be5e4a7a (patch) | |
| tree | 5251098665c477c9ce6f7a0215ca04493140fa47 /arch/arm/plat-omap | |
| parent | 2cb068149c365f1c2b10f2ece6786139527dcc16 (diff) | |
OMAP: hwmod: Fix softreset for modules with optional clocks
Some modules (like GPIO, DSS...) require optionals clock to be enabled
in order to complete the sofreset properly.
Add a HWMOD_CONTROL_OPT_CLKS_IN_RESET flag to force all optional clocks
to be enabled before reset. Disabled them once the reset is done.
TODO:
For the moment it is very hard to understand from the HW spec, which
optional clock is needed and which one is not. So the current approach
will enable all the optional clocks.
Paul proposed a much finer approach that will allow to tag only the needed
clock in the optional clock table. This might be doable as soon as we have
a clear understanding of these dependencies.
Reported-by: Partha Basak <p-basak2@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap_hwmod.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h index faa08273b1e..ee53758e1f4 100644 --- a/arch/arm/plat-omap/include/plat/omap_hwmod.h +++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h @@ -369,6 +369,10 @@ struct omap_hwmod_omap4_prcm { * HWMOD_SET_DEFAULT_CLOCKACT: program CLOCKACTIVITY bits at startup * HWMOD_NO_IDLEST : this module does not have idle status - this is the case * only for few initiator modules on OMAP2 & 3. + * HWMOD_CONTROL_OPT_CLKS_IN_RESET: Enable all optional clocks during reset. + * This is needed for devices like DSS that require optional clocks enabled + * in order to complete the reset. Optional clocks will be disabled + * again after the reset. */ #define HWMOD_SWSUP_SIDLE (1 << 0) #define HWMOD_SWSUP_MSTANDBY (1 << 1) @@ -377,6 +381,7 @@ struct omap_hwmod_omap4_prcm { #define HWMOD_NO_OCP_AUTOIDLE (1 << 4) #define HWMOD_SET_DEFAULT_CLOCKACT (1 << 5) #define HWMOD_NO_IDLEST (1 << 6) +#define HWMOD_CONTROL_OPT_CLKS_IN_RESET (1 << 7) /* * omap_hwmod._int_flags definitions |