linux-kernel - [PATCH v15 06/10] soc: qcom: cpr-common: Add support for flat fuse adjustment

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Message-Id: <20240708-topic-cpr3h-v15-6-5bc8b8936489@linaro.org>
Date: Mon, 08 Jul 2024 14:22:37 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>, 
 Stephen Boyd <sboyd@...nel.org>, Niklas Cassel <nks@...wful.org>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, "Rafael J. Wysocki" <rafael@...nel.org>, 
 Viresh Kumar <viresh.kumar@...aro.org>, 
 Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: Robert Marko <robimarko@...il.com>, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-pm@...r.kernel.org, Jeffrey Hugo <quic_jhugo@...cinc.com>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, 
 Varadarajan Narayanan <quic_varada@...cinc.com>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
Subject: [PATCH v15 06/10] soc: qcom: cpr-common: Add support for flat fuse
 adjustment

From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>

CPR3 makes use of post-calculation flat value adjustments. Add the
necessary bits to the common functions to support it.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
[Konrad: separate this patch out of a bigger one]
Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/pmdomain/qcom/cpr-common.c | 9 ++++++---
 drivers/pmdomain/qcom/cpr-common.h | 1 +
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/pmdomain/qcom/cpr-common.c b/drivers/pmdomain/qcom/cpr-common.c
index ea85f6b4bef8..44c681bbbf13 100644
--- a/drivers/pmdomain/qcom/cpr-common.c
+++ b/drivers/pmdomain/qcom/cpr-common.c
@@ -49,7 +49,7 @@ int cpr_populate_ring_osc_idx(struct device *dev,
 EXPORT_SYMBOL_GPL(cpr_populate_ring_osc_idx);

 static int cpr_read_fuse_uV(int init_v_width, int step_size_uV, int ref_uV,
-			    int step_volt, const char *init_v_efuse,
+			    int adj, int step_volt, const char *init_v_efuse,
 			    struct device *dev)
 {
 	int steps, uV;
@@ -67,6 +67,9 @@ static int cpr_read_fuse_uV(int init_v_width, int step_size_uV, int ref_uV,

 	uV = ref_uV + steps * step_size_uV;

+	/* Apply open-loop fixed adjustments to fused values */
+	uV += adj;
+
 	return DIV_ROUND_UP(uV, step_volt) * step_volt;
 }

@@ -119,8 +122,8 @@ int cpr_populate_fuse_common(struct device *dev,

 	/* Populate uV */
 	uV = cpr_read_fuse_uV(init_v_width, init_v_step,
-			      fdata->ref_uV, step_volt,
-			      cpr_fuse->init_voltage, dev);
+			      fdata->ref_uV, fdata->volt_oloop_adjust,
+			      step_volt, cpr_fuse->init_voltage, dev);
 	if (uV < 0)
 		return uV;

diff --git a/drivers/pmdomain/qcom/cpr-common.h b/drivers/pmdomain/qcom/cpr-common.h
index 1f2ebf9394cf..0aa227617d2f 100644
--- a/drivers/pmdomain/qcom/cpr-common.h
+++ b/drivers/pmdomain/qcom/cpr-common.h
@@ -22,6 +22,7 @@ struct fuse_corner_data {
 	int ref_uV;
 	int max_uV;
 	int min_uV;
+	int volt_oloop_adjust;
 	int max_volt_scale;
 	int max_quot_scale;
 	/* fuse quot */

-- 
2.45.2