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

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>

11 files changed, 147 insertions, 28 deletions

diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c
index c38a530a7f47..dca1d662d5e0 100644
--- a/arch/arm/mach-omap2/omap_twl.c
+++ b/arch/arm/mach-omap2/omap_twl.c
@@ -141,10 +141,6 @@ static u8 twl6030_uv_to_vsel(unsigned long uv)
 static struct omap_voltdm_pmic omap3_mpu_pmic = {
         .slew_rate              = 4000,
         .step_size              = 12500,
-        .on_volt                = 1200000,
-        .onlp_volt              = 1000000,
-        .ret_volt               = 975000,
-        .off_volt               = 600000,
         .volt_setup_time        = 0xfff,
         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
@@ -162,10 +158,6 @@ static struct omap_voltdm_pmic omap3_mpu_pmic = {
 static struct omap_voltdm_pmic omap3_core_pmic = {
         .slew_rate              = 4000,
         .step_size              = 12500,
-        .on_volt                = 1200000,
-        .onlp_volt              = 1000000,
-        .ret_volt               = 975000,
-        .off_volt               = 600000,
         .volt_setup_time        = 0xfff,
         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
@@ -183,10 +175,6 @@ static struct omap_voltdm_pmic omap3_core_pmic = {
 static struct omap_voltdm_pmic omap4_mpu_pmic = {
         .slew_rate              = 4000,
         .step_size              = 12660,
-        .on_volt                = 1375000,
-        .onlp_volt              = 1375000,
-        .ret_volt               = 830000,
-        .off_volt               = 0,
         .volt_setup_time        = 0,
         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
@@ -205,10 +193,6 @@ static struct omap_voltdm_pmic omap4_mpu_pmic = {
 static struct omap_voltdm_pmic omap4_iva_pmic = {
         .slew_rate              = 4000,
         .step_size              = 12660,
-        .on_volt                = 1188000,
-        .onlp_volt              = 1188000,
-        .ret_volt               = 830000,
-        .off_volt               = 0,
         .volt_setup_time        = 0,
         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
@@ -227,10 +211,6 @@ static struct omap_voltdm_pmic omap4_iva_pmic = {
 static struct omap_voltdm_pmic omap4_core_pmic = {
         .slew_rate              = 4000,
         .step_size              = 12660,
-        .on_volt                = 1200000,
-        .onlp_volt              = 1200000,
-        .ret_volt               = 830000,
-        .off_volt               = 0,
         .volt_setup_time        = 0,
         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
diff --git a/arch/arm/mach-omap2/vc.c b/arch/arm/mach-omap2/vc.c
index 880249b17012..4c3c41fd2637 100644
--- a/arch/arm/mach-omap2/vc.c
+++ b/arch/arm/mach-omap2/vc.c
@@ -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) |
diff --git a/arch/arm/mach-omap2/vc.h b/arch/arm/mach-omap2/vc.h
index 478bf6b432c4..7618b69811d0 100644
--- a/arch/arm/mach-omap2/vc.h
+++ b/arch/arm/mach-omap2/vc.h
@@ -111,6 +111,13 @@ extern struct omap_vc_channel omap4_vc_mpu;
 extern struct omap_vc_channel omap4_vc_iva;
 extern struct omap_vc_channel omap4_vc_core;
 
+extern struct omap_vc_param omap3_mpu_vc_data;
+extern struct omap_vc_param omap3_core_vc_data;
+
+extern struct omap_vc_param omap4_mpu_vc_data;
+extern struct omap_vc_param omap4_iva_vc_data;
+extern struct omap_vc_param omap4_core_vc_data;
+
 void omap_vc_init_channel(struct voltagedomain *voltdm);
 int omap_vc_pre_scale(struct voltagedomain *voltdm,
                       unsigned long target_volt,
diff --git a/arch/arm/mach-omap2/vc3xxx_data.c b/arch/arm/mach-omap2/vc3xxx_data.c
index 5d8eaf31569c..75bc4aa22b3a 100644
--- a/arch/arm/mach-omap2/vc3xxx_data.c
+++ b/arch/arm/mach-omap2/vc3xxx_data.c
@@ -71,3 +71,25 @@ struct omap_vc_channel omap3_vc_core = {
         .smps_cmdra_mask = OMAP3430_CMDRA1_MASK,
         .cfg_channel_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA1_SHIFT,
 };
+
+/*
+ * Voltage levels for different operating modes: on, sleep, retention and off
+ */
+#define OMAP3_ON_VOLTAGE_UV             1200000
+#define OMAP3_ONLP_VOLTAGE_UV           1000000
+#define OMAP3_RET_VOLTAGE_UV            975000
+#define OMAP3_OFF_VOLTAGE_UV            600000
+
+struct omap_vc_param omap3_mpu_vc_data = {
+        .on             = OMAP3_ON_VOLTAGE_UV,
+        .onlp           = OMAP3_ONLP_VOLTAGE_UV,
+        .ret            = OMAP3_RET_VOLTAGE_UV,
+        .off            = OMAP3_OFF_VOLTAGE_UV,
+};
+
+struct omap_vc_param omap3_core_vc_data = {
+        .on             = OMAP3_ON_VOLTAGE_UV,
+        .onlp           = OMAP3_ONLP_VOLTAGE_UV,
+        .ret            = OMAP3_RET_VOLTAGE_UV,
+        .off            = OMAP3_OFF_VOLTAGE_UV,
+};
diff --git a/arch/arm/mach-omap2/vc44xx_data.c b/arch/arm/mach-omap2/vc44xx_data.c
index d70b930f2739..085e5d6a04fd 100644
--- a/arch/arm/mach-omap2/vc44xx_data.c
+++ b/arch/arm/mach-omap2/vc44xx_data.c
@@ -87,3 +87,31 @@ struct omap_vc_channel omap4_vc_core = {
         .cfg_channel_sa_shift = OMAP4430_SA_VDD_CORE_L_SHIFT,
 };
 
+/*
+ * Voltage levels for different operating modes: on, sleep, retention and off
+ */
+#define OMAP4_ON_VOLTAGE_UV                     1375000
+#define OMAP4_ONLP_VOLTAGE_UV                   1375000
+#define OMAP4_RET_VOLTAGE_UV                    837500
+#define OMAP4_OFF_VOLTAGE_UV                    0
+
+struct omap_vc_param omap4_mpu_vc_data = {
+        .on                     = OMAP4_ON_VOLTAGE_UV,
+        .onlp                   = OMAP4_ONLP_VOLTAGE_UV,
+        .ret                    = OMAP4_RET_VOLTAGE_UV,
+        .off                    = OMAP4_OFF_VOLTAGE_UV,
+};
+
+struct omap_vc_param omap4_iva_vc_data = {
+        .on                     = OMAP4_ON_VOLTAGE_UV,
+        .onlp                   = OMAP4_ONLP_VOLTAGE_UV,
+        .ret                    = OMAP4_RET_VOLTAGE_UV,
+        .off                    = OMAP4_OFF_VOLTAGE_UV,
+};
+
+struct omap_vc_param omap4_core_vc_data = {
+        .on                     = OMAP4_ON_VOLTAGE_UV,
+        .onlp                   = OMAP4_ONLP_VOLTAGE_UV,
+        .ret                    = OMAP4_RET_VOLTAGE_UV,
+        .off                    = OMAP4_OFF_VOLTAGE_UV,
+};
diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h
index a3607b83790d..697095551bb6 100644
--- a/arch/arm/mach-omap2/voltage.h
+++ b/arch/arm/mach-omap2/voltage.h
@@ -74,6 +74,8 @@ struct voltagedomain {
         const struct omap_vfsm_instance *vfsm;
         struct omap_vp_instance *vp;
         struct omap_voltdm_pmic *pmic;
+        struct omap_vp_param *vp_param;
+        struct omap_vc_param *vc_param;
 
         /* VC/VP register access functions: SoC specific */
         u32 (*read) (u8 offset);
@@ -125,10 +127,6 @@ struct voltagedomain {
 struct omap_voltdm_pmic {
         int slew_rate;
         int step_size;
-        u32 on_volt;
-        u32 onlp_volt;
-        u32 ret_volt;
-        u32 off_volt;
         u16 volt_setup_time;
         u16 i2c_slave_addr;
         u16 volt_reg_addr;
@@ -145,6 +143,18 @@ struct omap_voltdm_pmic {
         u8 (*uv_to_vsel) (unsigned long uV);
 };
 
+struct omap_vp_param {
+        u32 vddmax;
+        u32 vddmin;
+};
+
+struct omap_vc_param {
+        u32 on;
+        u32 onlp;
+        u32 ret;
+        u32 off;
+};
+
 void omap_voltage_get_volttable(struct voltagedomain *voltdm,
                 struct omap_volt_data **volt_data);
 struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
diff --git a/arch/arm/mach-omap2/voltagedomains3xxx_data.c b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
index 63afbfed3cbc..261bb7cb4e60 100644
--- a/arch/arm/mach-omap2/voltagedomains3xxx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
@@ -117,6 +117,11 @@ void __init omap3xxx_voltagedomains_init(void)
         }
 #endif
 
+        omap3_voltdm_mpu.vp_param = &omap3_mpu_vp_data;
+        omap3_voltdm_core.vp_param = &omap3_core_vp_data;
+        omap3_voltdm_mpu.vc_param = &omap3_mpu_vc_data;
+        omap3_voltdm_core.vc_param = &omap3_core_vc_data;
+
         if (soc_is_am35xx())
                 voltdms = voltagedomains_am35xx;
         else
diff --git a/arch/arm/mach-omap2/voltagedomains44xx_data.c b/arch/arm/mach-omap2/voltagedomains44xx_data.c
index c3115f6853d4..a2d7d9ca2380 100644
--- a/arch/arm/mach-omap2/voltagedomains44xx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains44xx_data.c
@@ -106,6 +106,14 @@ void __init omap44xx_voltagedomains_init(void)
         omap4_voltdm_core.volt_data = omap44xx_vdd_core_volt_data;
 #endif
 
+        omap4_voltdm_mpu.vp_param = &omap4_mpu_vp_data;
+        omap4_voltdm_iva.vp_param = &omap4_iva_vp_data;
+        omap4_voltdm_core.vp_param = &omap4_core_vp_data;
+
+        omap4_voltdm_mpu.vc_param = &omap4_mpu_vc_data;
+        omap4_voltdm_iva.vc_param = &omap4_iva_vc_data;
+        omap4_voltdm_core.vc_param = &omap4_core_vc_data;
+
         for (i = 0; voltdm = voltagedomains_omap4[i], voltdm; i++)
                 voltdm->sys_clk.name = sys_clk_name;
 
diff --git a/arch/arm/mach-omap2/vp.h b/arch/arm/mach-omap2/vp.h
index 7c155d248aa3..0fdf7080e4a6 100644
--- a/arch/arm/mach-omap2/vp.h
+++ b/arch/arm/mach-omap2/vp.h
@@ -117,6 +117,13 @@ extern struct omap_vp_instance omap4_vp_mpu;
 extern struct omap_vp_instance omap4_vp_iva;
 extern struct omap_vp_instance omap4_vp_core;
 
+extern struct omap_vp_param omap3_mpu_vp_data;
+extern struct omap_vp_param omap3_core_vp_data;
+
+extern struct omap_vp_param omap4_mpu_vp_data;
+extern struct omap_vp_param omap4_iva_vp_data;
+extern struct omap_vp_param omap4_core_vp_data;
+
 void omap_vp_init(struct voltagedomain *voltdm);
 void omap_vp_enable(struct voltagedomain *voltdm);
 void omap_vp_disable(struct voltagedomain *voltdm);
diff --git a/arch/arm/mach-omap2/vp3xxx_data.c b/arch/arm/mach-omap2/vp3xxx_data.c
index bd89f80089f5..1914e026245e 100644
--- a/arch/arm/mach-omap2/vp3xxx_data.c
+++ b/arch/arm/mach-omap2/vp3xxx_data.c
@@ -77,3 +77,13 @@ struct omap_vp_instance omap3_vp_core = {
         .vstatus = OMAP3_PRM_VP2_STATUS_OFFSET,
         .voltage = OMAP3_PRM_VP2_VOLTAGE_OFFSET,
 };
+
+struct omap_vp_param omap3_mpu_vp_data = {
+        .vddmin                 = OMAP3430_VP1_VLIMITTO_VDDMIN,
+        .vddmax                 = OMAP3430_VP1_VLIMITTO_VDDMAX,
+};
+
+struct omap_vp_param omap3_core_vp_data = {
+        .vddmin                 = OMAP3430_VP2_VLIMITTO_VDDMIN,
+        .vddmax                 = OMAP3430_VP2_VLIMITTO_VDDMAX,
+};
diff --git a/arch/arm/mach-omap2/vp44xx_data.c b/arch/arm/mach-omap2/vp44xx_data.c
index 8c031d16879e..e62f6b018beb 100644
--- a/arch/arm/mach-omap2/vp44xx_data.c
+++ b/arch/arm/mach-omap2/vp44xx_data.c
@@ -87,3 +87,18 @@ struct omap_vp_instance omap4_vp_core = {
         .vstatus = OMAP4_PRM_VP_CORE_STATUS_OFFSET,
         .voltage = OMAP4_PRM_VP_CORE_VOLTAGE_OFFSET,
 };
+
+struct omap_vp_param omap4_mpu_vp_data = {
+        .vddmin                 = OMAP4_VP_MPU_VLIMITTO_VDDMIN,
+        .vddmax                 = OMAP4_VP_MPU_VLIMITTO_VDDMAX,
+};
+
+struct omap_vp_param omap4_iva_vp_data = {
+        .vddmin                 = OMAP4_VP_IVA_VLIMITTO_VDDMIN,
+        .vddmax                 = OMAP4_VP_IVA_VLIMITTO_VDDMAX,
+};
+
+struct omap_vp_param omap4_core_vp_data = {
+        .vddmin                 = OMAP4_VP_CORE_VLIMITTO_VDDMIN,
+        .vddmax                 = OMAP4_VP_CORE_VLIMITTO_VDDMAX,
+};