linux-kernel - [PATCH v13 2/3] phy: qcom-qmp: add regulator_set

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Date:   Wed, 25 May 2022 14:02:19 -0700
From:   Kuogee Hsieh <quic_khsieh@...cinc.com>
To:     <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
        <sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
        <vkoul@...nel.org>, <daniel@...ll.ch>, <airlied@...ux.ie>,
        <agross@...nel.org>, <dmitry.baryshkov@...aro.org>,
        <bjorn.andersson@...aro.org>
CC:     Kuogee Hsieh <quic_khsieh@...cinc.com>,
        <quic_abhinavk@...cinc.com>, <quic_aravindh@...cinc.com>,
        <quic_sbillaka@...cinc.com>, <freedreno@...ts.freedesktop.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v13 2/3] phy: qcom-qmp: add regulator_set_load to dp phy

This patch add regulator_set_load() before enable regulator at
DP phy driver.

Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Douglas Anderson <dianders@...omium.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 40 ++++++++++++++++++++++++++++---------
 1 file changed, 31 insertions(+), 9 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index b144ae1..26b290c 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -3075,6 +3075,17 @@ static const struct qmp_phy_init_tbl sm8450_qmp_gen4x2_pcie_pcs_misc_tbl[] = {
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_PCIE_G4_PRE_GAIN, 0x2e),
 };
 
+/* list of regulators */
+struct qmp_regulator_data {
+	const char *name;
+	unsigned int enable_load;
+};
+
+struct qmp_regulator_data qmp_phy_vreg_l[] = {
+	{ .name = "vdda-phy", .enable_load = 21800 },
+	{ .name = "vdda-pll", .enable_load = 36000 },
+};
+
 struct qmp_phy;
 
 /* struct qmp_phy_cfg - per-PHY initialization config */
@@ -3129,7 +3140,7 @@ struct qmp_phy_cfg {
 	const char * const *reset_list;
 	int num_resets;
 	/* regulators to be requested */
-	const char * const *vreg_list;
+	const struct qmp_regulator_data *vreg_list;
 	int num_vregs;
 
 	/* array of registers with different offsets */
@@ -3341,11 +3352,6 @@ static const char * const sdm845_pciephy_reset_l[] = {
 	"phy",
 };
 
-/* list of regulators */
-static const char * const qmp_phy_vreg_l[] = {
-	"vdda-phy", "vdda-pll",
-};
-
 static const struct qmp_phy_cfg ipq8074_usb3phy_cfg = {
 	.type			= PHY_TYPE_USB3,
 	.nlanes			= 1,
@@ -5488,16 +5494,32 @@ static int qcom_qmp_phy_vreg_init(struct device *dev, const struct qmp_phy_cfg *
 {
 	struct qcom_qmp *qmp = dev_get_drvdata(dev);
 	int num = cfg->num_vregs;
-	int i;
+	int ret, i;
 
 	qmp->vregs = devm_kcalloc(dev, num, sizeof(*qmp->vregs), GFP_KERNEL);
 	if (!qmp->vregs)
 		return -ENOMEM;
 
 	for (i = 0; i < num; i++)
-		qmp->vregs[i].supply = cfg->vreg_list[i];
+		qmp->vregs[i].supply = cfg->vreg_list[i].name;
 
-	return devm_regulator_bulk_get(dev, num, qmp->vregs);
+	ret = devm_regulator_bulk_get(dev, num, qmp->vregs);
+	if (ret) {
+		dev_err(dev, "failed at devm_regulator_bulk_get\n");
+		return ret;
+	}
+
+	for (i = 0; i < num; i++) {
+		ret = regulator_set_load(qmp->vregs[i].consumer,
+					 cfg->vreg_list[i].enable_load);
+		if (ret) {
+			dev_err(dev, "failed to set load at %s\n",
+				qmp->vregs[i].supply);
+			return ret;
+		}
+	}
+
+	return 0;
 }
 
 static int qcom_qmp_phy_reset_init(struct device *dev, const struct qmp_phy_cfg *cfg)
-- 
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