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| author | Kevin Hilman <khilman@ti.com> | 2011-04-05 15:15:31 -0700 |
|---|---|---|
| committer | Kevin Hilman <khilman@ti.com> | 2011-09-15 12:09:08 -0700 |
| commit | 76ea7424f80350884b4d70ae54cfa51f7f9b2a48 (patch) | |
| tree | 933d9d3590c21860fcf02fd594b0a5db46c60252 /arch/arm/mach-omap2/vp.c | |
| parent | 6f56727383ca3233f40af5e792a08bf07b18f5fd (diff) | |
| download | linux-76ea7424f80350884b4d70ae54cfa51f7f9b2a48.tar.gz linux-76ea7424f80350884b4d70ae54cfa51f7f9b2a48.tar.bz2 linux-76ea7424f80350884b4d70ae54cfa51f7f9b2a48.zip | |
OMAP3+: VP: create VP helper function for updating error gain
Create new helper function in VP layer for updating VP error gain.
Currently used during pre-scale for VP force update and VC bypass.
TODO: determine if this can be removed from the pre-scale path and
moved to VP enable path.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/vp.c')
| -rw-r--r-- | arch/arm/mach-omap2/vp.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/vp.c b/arch/arm/mach-omap2/vp.c index ea61a47bd199..f68a6db27111 100644 --- a/arch/arm/mach-omap2/vp.c +++ b/arch/arm/mach-omap2/vp.c @@ -106,6 +106,25 @@ void __init omap_vp_init(struct voltagedomain *voltdm) voltdm->write(vp_val, vp->vlimitto); } +int omap_vp_update_errorgain(struct voltagedomain *voltdm, + unsigned long target_volt) +{ + struct omap_volt_data *volt_data; + + /* Get volt_data corresponding to target_volt */ + volt_data = omap_voltage_get_voltdata(voltdm, target_volt); + if (IS_ERR(volt_data)) + return -EINVAL; + + /* Setting vp errorgain based on the voltage */ + voltdm->rmw(voltdm->vp->common->vpconfig_errorgain_mask, + volt_data->vp_errgain << + __ffs(voltdm->vp->common->vpconfig_errorgain_mask), + voltdm->vp->vpconfig); + + return 0; +} + /* VP force update method of voltage scaling */ int omap_vp_forceupdate_scale(struct voltagedomain *voltdm, unsigned long target_volt) |