diff --git a/arch/arm/cpu/armv7/omap-common/clocks-common.c b/arch/arm/cpu/armv7/omap-common/clocks-common.c
index 6c8226d39327eecff443f265de5b8a1725284140..9c75c13c9f0a8f925ea2f877fecfee6dd9c8fa6d 100644
--- a/arch/arm/cpu/armv7/omap-common/clocks-common.c
+++ b/arch/arm/cpu/armv7/omap-common/clocks-common.c
@@ -521,6 +521,38 @@ void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic)
gpio_direction_output(pmic->gpio, 1);
}
+static u32 optimize_vcore_voltage(struct volts const *v)
+{
+ u32 val;
+ if (!v->value)
+ return 0;
+ if (!v->efuse.reg)
+ return v->value;
+
+ switch (v->efuse.reg_bits) {
+ case 16:
+ val = readw(v->efuse.reg);
+ break;
+ case 32:
+ val = readl(v->efuse.reg);
+ break;
+ default:
+ printf("Error: efuse 0x%08x bits=%d unknown\n",
+ v->efuse.reg, v->efuse.reg_bits);
+ return v->value;
+ }
+
+ if (!val) {
+ printf("Error: efuse 0x%08x bits=%d val=0, using %d\n",
+ v->efuse.reg, v->efuse.reg_bits, v->value);
+ return v->value;
+ }
+
+ debug("%s:efuse 0x%08x bits=%d Vnom=%d, using efuse value %d\n",
+ __func__, v->efuse.reg, v->efuse.reg_bits, v->value, val);
+ return val;
+}
+
/*
* Setup the voltages for vdd_mpu, vdd_core, and vdd_iva
* We set the maximum voltages allowed here because Smart-Reflex is not
@@ -529,11 +561,13 @@ void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic)
*/
void scale_vcores(struct vcores_data const *vcores)
{
- do_scale_vcore(vcores->core.addr, vcores->core.value,
- vcores->core.pmic);
+ u32 val;
+
+ val = optimize_vcore_voltage(&vcores->core);
+ do_scale_vcore(vcores->core.addr, val, vcores->core.pmic);
- do_scale_vcore(vcores->mpu.addr, vcores->mpu.value,
- vcores->mpu.pmic);
+ val = optimize_vcore_voltage(&vcores->mpu);
+ do_scale_vcore(vcores->mpu.addr, val, vcores->mpu.pmic);
/* Configure MPU ABB LDO after scale */
abb_setup((*ctrl)->control_std_fuse_opp_vdd_mpu_2,
@@ -544,17 +578,17 @@ void scale_vcores(struct vcores_data const *vcores)
OMAP_ABB_MPU_TXDONE_MASK,
OMAP_ABB_FAST_OPP);
- do_scale_vcore(vcores->mm.addr, vcores->mm.value,
- vcores->mm.pmic);
+ val = optimize_vcore_voltage(&vcores->mm);
+ do_scale_vcore(vcores->mm.addr, val, vcores->mm.pmic);
- do_scale_vcore(vcores->gpu.addr, vcores->gpu.value,
- vcores->gpu.pmic);
+ val = optimize_vcore_voltage(&vcores->gpu);
+ do_scale_vcore(vcores->gpu.addr, val, vcores->gpu.pmic);
- do_scale_vcore(vcores->eve.addr, vcores->eve.value,
- vcores->eve.pmic);
+ val = optimize_vcore_voltage(&vcores->eve);
+ do_scale_vcore(vcores->eve.addr, val, vcores->eve.pmic);
- do_scale_vcore(vcores->iva.addr, vcores->iva.value,
- vcores->iva.pmic);
+ val = optimize_vcore_voltage(&vcores->iva);
+ do_scale_vcore(vcores->iva.addr, val, vcores->iva.pmic);
if (emif_sdram_type() == EMIF_SDRAM_TYPE_DDR3) {
/* Configure LDO SRAM "magic" bits */
diff --git a/arch/arm/cpu/armv7/omap5/hw_data.c b/arch/arm/cpu/armv7/omap5/hw_data.c
index 90274a02cfdeeac70af20108ec29bb329216c446..bddcaed179798293428dd6ff48bd2dbee5833001 100644
--- a/arch/arm/cpu/armv7/omap5/hw_data.c
+++ b/arch/arm/cpu/armv7/omap5/hw_data.c
@@ -338,22 +338,32 @@ struct vcores_data omap5430_volts_es2 = {
struct vcores_data dra752_volts = {
.mpu.value = VDD_MPU_DRA752,
+ .mpu.efuse.reg = STD_FUSE_OPP_VMIN_MPU_NOM,
+ .mpu.efuse.reg_bits = DRA752_EFUSE_REGBITS,
.mpu.addr = TPS659038_REG_ADDR_SMPS12_MPU,
.mpu.pmic = &tps659038,
.eve.value = VDD_EVE_DRA752,
+ .eve.efuse.reg = STD_FUSE_OPP_VMIN_DSPEVE_NOM,
+ .eve.efuse.reg_bits = DRA752_EFUSE_REGBITS,
.eve.addr = TPS659038_REG_ADDR_SMPS45_EVE,
.eve.pmic = &tps659038,
.gpu.value = VDD_GPU_DRA752,
+ .gpu.efuse.reg = STD_FUSE_OPP_VMIN_GPU_NOM,
+ .gpu.efuse.reg_bits = DRA752_EFUSE_REGBITS,
.gpu.addr = TPS659038_REG_ADDR_SMPS6_GPU,
.gpu.pmic = &tps659038,
.core.value = VDD_CORE_DRA752,
+ .core.efuse.reg = STD_FUSE_OPP_VMIN_CORE_NOM,
+ .core.efuse.reg_bits = DRA752_EFUSE_REGBITS,
.core.addr = TPS659038_REG_ADDR_SMPS7_CORE,
.core.pmic = &tps659038,
.iva.value = VDD_IVA_DRA752,
+ .iva.efuse.reg = STD_FUSE_OPP_VMIN_IVA_NOM,
+ .iva.efuse.reg_bits = DRA752_EFUSE_REGBITS,
.iva.addr = TPS659038_REG_ADDR_SMPS8_IVA,
.iva.pmic = &tps659038,
};
diff --git a/arch/arm/include/asm/arch-omap5/clock.h b/arch/arm/include/asm/arch-omap5/clock.h
index f7ddd5ffe51db6e4d538aabbef28641c967583b9..6d02835ead57ccb2fb0b341cb9bf7cd28f918db9 100644
--- a/arch/arm/include/asm/arch-omap5/clock.h
+++ b/arch/arm/include/asm/arch-omap5/clock.h
@@ -219,6 +219,36 @@
#define VDD_CORE_DRA752 1030
#define VDD_IVA_DRA752 1060
+/* Efuse register offsets for DRA7xx platform */
+#define DRA752_EFUSE_BASE 0x4A002000
+#define DRA752_EFUSE_REGBITS 16
+/* STD_FUSE_OPP_VMIN_IVA_2 */
+#define STD_FUSE_OPP_VMIN_IVA_NOM (DRA752_EFUSE_BASE + 0x05CC)
+/* STD_FUSE_OPP_VMIN_IVA_3 */
+#define STD_FUSE_OPP_VMIN_IVA_OD (DRA752_EFUSE_BASE + 0x05D0)
+/* STD_FUSE_OPP_VMIN_IVA_4 */
+#define STD_FUSE_OPP_VMIN_IVA_HIGH (DRA752_EFUSE_BASE + 0x05D4)
+/* STD_FUSE_OPP_VMIN_DSPEVE_2 */
+#define STD_FUSE_OPP_VMIN_DSPEVE_NOM (DRA752_EFUSE_BASE + 0x05E0)
+/* STD_FUSE_OPP_VMIN_DSPEVE_3 */
+#define STD_FUSE_OPP_VMIN_DSPEVE_OD (DRA752_EFUSE_BASE + 0x05E4)
+/* STD_FUSE_OPP_VMIN_DSPEVE_4 */
+#define STD_FUSE_OPP_VMIN_DSPEVE_HIGH (DRA752_EFUSE_BASE + 0x05E8)
+/* STD_FUSE_OPP_VMIN_CORE_2 */
+#define STD_FUSE_OPP_VMIN_CORE_NOM (DRA752_EFUSE_BASE + 0x05F4)
+/* STD_FUSE_OPP_VMIN_GPU_2 */
+#define STD_FUSE_OPP_VMIN_GPU_NOM (DRA752_EFUSE_BASE + 0x1B08)
+/* STD_FUSE_OPP_VMIN_GPU_3 */
+#define STD_FUSE_OPP_VMIN_GPU_OD (DRA752_EFUSE_BASE + 0x1B0C)
+/* STD_FUSE_OPP_VMIN_GPU_4 */
+#define STD_FUSE_OPP_VMIN_GPU_HIGH (DRA752_EFUSE_BASE + 0x1B10)
+/* STD_FUSE_OPP_VMIN_MPU_2 */
+#define STD_FUSE_OPP_VMIN_MPU_NOM (DRA752_EFUSE_BASE + 0x1B20)
+/* STD_FUSE_OPP_VMIN_MPU_3 */
+#define STD_FUSE_OPP_VMIN_MPU_OD (DRA752_EFUSE_BASE + 0x1B24)
+/* STD_FUSE_OPP_VMIN_MPU_4 */
+#define STD_FUSE_OPP_VMIN_MPU_HIGH (DRA752_EFUSE_BASE + 0x1B28)
+
/* Standard offset is 0.5v expressed in uv */
#define PALMAS_SMPS_BASE_VOLT_UV 500000
diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h
index 3b8bece699d631e99de30a3685625c81853437eb..f51fccce5911cff57aca6fa3e974309d8f8260d0 100644
--- a/arch/arm/include/asm/omap_common.h
+++ b/arch/arm/include/asm/omap_common.h
@@ -506,9 +506,20 @@ struct pmic_data {
int (*pmic_write)(u8 sa, u8 reg_addr, u8 reg_data);
};
+/**
+ * struct volts_efuse_data - efuse definition for voltage
+ * @reg: register address for efuse
+ * @reg_bits: Number of bits in a register address, mandatory.
+ */
+struct volts_efuse_data {
+ u32 reg;
+ u8 reg_bits;
+};
+
struct volts {
u32 value;
u32 addr;
+ struct volts_efuse_data efuse;
struct pmic_data *pmic;
};