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ARM: OMAP3+: voltage: introduce omap vc / vp params for voltagedomains

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These new structs will hold the sleep voltage levels (omap_vc_params)
and voltage processor min / max voltages (omap_vp_params.) Previously
these were part of the PMIC struct, but they do not really belong there,
as they are OMAP chip specific, not PMIC specific parameters. voltdm
code is also changed to use the new structs.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Tero Kristo
2012-09-25 19:33:35 +03:00
committed by Kevin Hilman
parent b254012b21
commit 8b5d8c0d71
11 changed files with 147 additions and 28 deletions
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35
arch/arm/mach-omap2/vc.c
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@@ -135,6 +135,8 @@ int omap_vc_pre_scale(struct voltagedomain *voltdm,
vc_cmdval |= (*target_vsel << vc->common->cmd_on_shift);
voltdm->write(vc_cmdval, vc->cmdval_reg);
voltdm->vc_param->on = target_volt;
omap_vp_update_errorgain(voltdm, target_volt);
return 0;
@@ -284,6 +286,30 @@ static void __init omap_vc_i2c_init(struct voltagedomain *voltdm)
initialized = true;
}
/**
* omap_vc_calc_vsel - calculate vsel value for a channel
* @voltdm: channel to calculate value for
* @uvolt: microvolt value to convert to vsel
*
* Converts a microvolt value to vsel value for the used PMIC.
* This checks whether the microvolt value is out of bounds, and
* adjusts the value accordingly. If unsupported value detected,
* warning is thrown.
*/
static u8 omap_vc_calc_vsel(struct voltagedomain *voltdm, u32 uvolt)
{
if (voltdm->pmic->vddmin > uvolt)
uvolt = voltdm->pmic->vddmin;
if (voltdm->pmic->vddmax < uvolt) {
WARN(1, "%s: voltage not supported by pmic: %u vs max %u\n",
__func__, uvolt, voltdm->pmic->vddmax);
/* Lets try maximum value anyway */
uvolt = voltdm->pmic->vddmax;
}
return voltdm->pmic->uv_to_vsel(uvolt);
}
void __init omap_vc_init_channel(struct voltagedomain *voltdm)
{
struct omap_vc_channel *vc = voltdm->vc;
@@ -335,10 +361,11 @@ void __init omap_vc_init_channel(struct voltagedomain *voltdm)
}
/* Set up the on, inactive, retention and off voltage */
on_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->on_volt);
onlp_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->onlp_volt);
ret_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->ret_volt);
off_vsel = voltdm->pmic->uv_to_vsel(voltdm->pmic->off_volt);
on_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->on);
onlp_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->onlp);
ret_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->ret);
off_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->off);
val = ((on_vsel << vc->common->cmd_on_shift) |
(onlp_vsel << vc->common->cmd_onlp_shift) |
(ret_vsel << vc->common->cmd_ret_shift) |