Merge "regulator: cprh-kbss-regulator: support the force highest corner fuse" (e97b6a0e) · Commits · e / devices / android_kernel_sony_msm8998

drivers/regulator/cprh-kbss-regulator.c

+77 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,9 @@
		* @speed_bin: Application processor speed bin fuse parameter value for
		* the given chip
		* @cpr_fusing_rev: CPR fusing revision fuse parameter value
		* @force_highest_corner: Flag indicating that all corners must operate
		* at the voltage of the highest corner. This is
		* applicable to MSMCOBALT only.
		*
		* This struct holds the values for all of the fuses read from memory.
		*/
		@@ -61,6 +64,7 @@ struct cprh_msmcobalt_kbss_fuses {
		u64 quot_offset[MSMCOBALT_KBSS_FUSE_CORNERS];
		u64 speed_bin;
		u64 cpr_fusing_rev;
		u64 force_highest_corner;
		};

		/*
		@@ -181,6 +185,12 @@ static const struct cpr3_fuse_param msmcobalt_kbss_speed_bin_param[] = {
		{},
		};

		static const struct cpr3_fuse_param
		msmcobalt_cpr_force_highest_corner_param[] = {
		{100, 45, 45},
		{},
		};

		/*
		* Open loop voltage fuse reference voltages in microvolts for MSMCOBALT v1
		*/
		@@ -301,6 +311,18 @@ static int cprh_msmcobalt_kbss_read_fuse_data(struct cpr3_regulator *vreg)

		}

		rc = cpr3_read_fuse_param(base,
		msmcobalt_cpr_force_highest_corner_param,
		&fuse->force_highest_corner);
		if (rc) {
		cpr3_err(vreg, "Unable to read CPR force highest corner fuse, rc=%d\n",
		rc);
		return rc;
		}

		if (fuse->force_highest_corner)
		cpr3_info(vreg, "Fusing requires all operation at the highest corner\n");

		vreg->fuse_combo = fuse->cpr_fusing_rev + 8 * fuse->speed_bin;
		if (vreg->fuse_combo >= CPRH_MSMCOBALT_KBSS_FUSE_COMBO_COUNT) {
		cpr3_err(vreg, "invalid CPR fuse combo = %d found\n",
		@@ -484,6 +506,54 @@ done:
		return rc;
		}

		/**
		* cprh_msmcobalt_partial_binning_override() - override the voltage and quotient
		* settings for low corners based upon special partial binning
		* fuse values
		*
		* @vreg: Pointer to the CPR3 regulator
		*
		* Some parts are not able to operate at low voltages. The force highest
		* corner fuse specifies if a given part must operate with voltages
		* corresponding to the highest corner.
		*
		* Return: 0 on success, errno on failure
		*/
		static int cprh_msmcobalt_partial_binning_override(struct cpr3_regulator *vreg)
		{
		struct cprh_msmcobalt_kbss_fuses *fuse = vreg->platform_fuses;
		struct cpr3_corner *corner;
		struct cpr4_sdelta *sdelta;
		int i;
		u32 proc_freq;

		if (fuse->force_highest_corner) {
		cpr3_info(vreg, "overriding CPR parameters for corners 0 to %d with quotients and voltages of corner %d\n",
		vreg->corner_count - 2, vreg->corner_count - 1);
		corner = &vreg->corner[vreg->corner_count - 1];
		for (i = 0; i < vreg->corner_count - 1; i++) {
		proc_freq = vreg->corner[i].proc_freq;
		sdelta = vreg->corner[i].sdelta;
		if (sdelta) {
		if (sdelta->table)
		devm_kfree(vreg->thread->ctrl->dev,
		sdelta->table);
		if (sdelta->boost_table)
		devm_kfree(vreg->thread->ctrl->dev,
		sdelta->boost_table);
		devm_kfree(vreg->thread->ctrl->dev,
		sdelta);
		}
		vreg->corner[i] = *corner;
		vreg->corner[i].proc_freq = proc_freq;
		}

		return 0;
		}

		return 0;
		};

		/**
		* cprh_kbss_parse_core_count_temp_adj_properties() - load device tree
		* properties associated with per-corner-band and temperature
		@@ -1201,6 +1271,13 @@ static int cprh_kbss_init_regulator(struct cpr3_regulator *vreg)
		return -EINVAL;
		}

		rc = cprh_msmcobalt_partial_binning_override(vreg);
		if (rc) {
		cpr3_err(vreg, "unable to override CPR parameters based on partial binning fuse values, rc=%d\n",
		rc);
		return rc;
		}

		rc = cprh_kbss_apm_crossover_as_corner(vreg);
		if (rc) {
		cpr3_err(vreg, "unable to introduce APM voltage crossover corner, rc=%d\n",