linux-kernel - [RFC 5/9] Bluetooth: qca: use the power sequencer for QCA6390

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Message-Id: <20240201155532.49707-6-brgl@bgdev.pl>
Date: Thu,  1 Feb 2024 16:55:28 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Marcel Holtmann <marcel@...tmann.org>,
	Luiz Augusto von Dentz <luiz.dentz@...il.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Alex Elder <elder@...aro.org>,
	Srini Kandagatla <srinivas.kandagatla@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Abel Vesa <abel.vesa@...aro.org>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Lukas Wunner <lukas@...ner.de>
Cc: linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-bluetooth@...r.kernel.org,
	linux-pci@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [RFC 5/9] Bluetooth: qca: use the power sequencer for QCA6390

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Use the pwrseq subsystem's consumer API to run the power-up sequence for
the Bluetooth module of the QCA6390 package.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/bluetooth/hci_qca.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 94b8c406f0c0..21c306caafbc 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -28,6 +28,7 @@
 #include <linux/of.h>
 #include <linux/acpi.h>
 #include <linux/platform_device.h>
+#include <linux/pwrseq/consumer.h>
 #include <linux/regulator/consumer.h>
 #include <linux/serdev.h>
 #include <linux/mutex.h>
@@ -214,6 +215,7 @@ struct qca_power {
 	struct regulator_bulk_data *vreg_bulk;
 	int num_vregs;
 	bool vregs_on;
+	struct pwrseq_desc *pwrseq;
 };
 
 struct qca_serdev {
@@ -1791,6 +1793,11 @@ static int qca_power_on(struct hci_dev *hdev)
 		ret = qca_regulator_init(hu);
 		break;
 
+	case QCA_QCA6390:
+		qcadev = serdev_device_get_drvdata(hu->serdev);
+		ret = pwrseq_power_on(qcadev->bt_power->pwrseq);
+		break;
+
 	default:
 		qcadev = serdev_device_get_drvdata(hu->serdev);
 		if (qcadev->bt_en) {
@@ -2160,6 +2167,10 @@ static void qca_power_shutdown(struct hci_uart *hu)
 		}
 		break;
 
+	case QCA_QCA6390:
+		pwrseq_power_off(qcadev->bt_power->pwrseq);
+		break;
+
 	default:
 		gpiod_set_value_cansleep(qcadev->bt_en, 0);
 	}
@@ -2298,12 +2309,25 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 	case QCA_WCN6750:
 	case QCA_WCN6855:
 	case QCA_WCN7850:
+	case QCA_QCA6390:
 		qcadev->bt_power = devm_kzalloc(&serdev->dev,
 						sizeof(struct qca_power),
 						GFP_KERNEL);
 		if (!qcadev->bt_power)
 			return -ENOMEM;
+		break;
+	default:
+		break;
+	}
 
+	switch (qcadev->btsoc_type) {
+	case QCA_WCN3988:
+	case QCA_WCN3990:
+	case QCA_WCN3991:
+	case QCA_WCN3998:
+	case QCA_WCN6750:
+	case QCA_WCN6855:
+	case QCA_WCN7850:
 		qcadev->bt_power->dev = &serdev->dev;
 		err = qca_init_regulators(qcadev->bt_power, data->vregs,
 					  data->num_vregs);
@@ -2344,6 +2368,12 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 		}
 		break;
 
+	case QCA_QCA6390:
+		qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev);
+		if (IS_ERR(qcadev->bt_power->pwrseq))
+			return PTR_ERR(qcadev->bt_power->pwrseq);
+		fallthrough;
+
 	default:
 		qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
 					       GPIOD_OUT_LOW);
-- 
2.40.1