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| author | Tony Lindgren <tony@atomide.com> | 2010-12-21 17:05:57 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-12-21 17:05:57 -0800 |
| commit | b9e7683bbca638967a56e5d7fd4035a947109621 (patch) | |
| tree | 3d02725c6e6bb3d77e1c34a04d5179ea4ee2509e /Documentation | |
| parent | bb3613aa34a81a5e2f1227ccdb801fde04a7da10 (diff) | |
| parent | 53da4ce23809ca33405001b0ae117e60b7feced1 (diff) | |
Merge branch 'pm-opp' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/arm/OMAP/omap_pm | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/arm/OMAP/omap_pm b/Documentation/arm/OMAP/omap_pm index 5389440aade3..9012bb039094 100644 --- a/Documentation/arm/OMAP/omap_pm +++ b/Documentation/arm/OMAP/omap_pm @@ -127,3 +127,28 @@ implementation needs: 10. (*pdata->cpu_set_freq)(unsigned long f) 11. (*pdata->cpu_get_freq)(void) + +Customizing OPP for platform +============================ +Defining CONFIG_PM should enable OPP layer for the silicon +and the registration of OPP table should take place automatically. +However, in special cases, the default OPP table may need to be +tweaked, for e.g.: + * enable default OPPs which are disabled by default, but which + could be enabled on a platform + * Disable an unsupported OPP on the platform + * Define and add a custom opp table entry +in these cases, the board file needs to do additional steps as follows: +arch/arm/mach-omapx/board-xyz.c + #include "pm.h" + .... + static void __init omap_xyz_init_irq(void) + { + .... + /* Initialize the default table */ + omapx_opp_init(); + /* Do customization to the defaults */ + .... + } +NOTE: omapx_opp_init will be omap3_opp_init or as required +based on the omap family. |