linux-kernel - [PATCH v3 04/12] soc: qcom: pmic_glink: register ucsi aux device

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Message-Id: <20230130-topic-sm8450-upstream-pmic-glink-v3-4-4c860d265d28@linaro.org>
Date:   Thu, 09 Mar 2023 14:27:55 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v3 04/12] soc: qcom: pmic_glink: register ucsi aux device

Only register UCSI on know working devices, like on the SM8450
or SM8550 which requires UCSI to get USB mode switch events.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 drivers/soc/qcom/pmic_glink.c | 63 ++++++++++++++++++++++++++++++++++++-------
 1 file changed, 53 insertions(+), 10 deletions(-)

diff --git a/drivers/soc/qcom/pmic_glink.c b/drivers/soc/qcom/pmic_glink.c
index bb3fb57abcc6..48e015fee8e9 100644
--- a/drivers/soc/qcom/pmic_glink.c
+++ b/drivers/soc/qcom/pmic_glink.c
@@ -4,6 +4,7 @@
  * Copyright (c) 2022, Linaro Ltd
  */
 #include <linux/auxiliary_bus.h>
+#include <linux/of_device.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/rpmsg.h>
@@ -11,12 +12,23 @@
 #include <linux/soc/qcom/pdr.h>
 #include <linux/soc/qcom/pmic_glink.h>
 
+enum {
+	PMIC_GLINK_CLIENT_BATT = 0,
+	PMIC_GLINK_CLIENT_ALTMODE,
+	PMIC_GLINK_CLIENT_UCSI,
+};
+
+#define PMIC_GLINK_CLIENT_DEFAULT	(BIT(PMIC_GLINK_CLIENT_BATT) |	\
+					 BIT(PMIC_GLINK_CLIENT_ALTMODE))
+
 struct pmic_glink {
 	struct device *dev;
 	struct pdr_handle *pdr;
 
 	struct rpmsg_endpoint *ept;
 
+	unsigned long client_mask;
+
 	struct auxiliary_device altmode_aux;
 	struct auxiliary_device ps_aux;
 	struct auxiliary_device ucsi_aux;
@@ -233,6 +245,7 @@ static struct rpmsg_driver pmic_glink_rpmsg_driver = {
 
 static int pmic_glink_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *match;
 	struct pdr_service *service;
 	struct pmic_glink *pg;
 	int ret;
@@ -249,12 +262,27 @@ static int pmic_glink_probe(struct platform_device *pdev)
 	mutex_init(&pg->client_lock);
 	mutex_init(&pg->state_lock);
 
-	ret = pmic_glink_add_aux_device(pg, &pg->altmode_aux, "altmode");
-	if (ret)
-		return ret;
-	ret = pmic_glink_add_aux_device(pg, &pg->ps_aux, "power-supply");
-	if (ret)
-		goto out_release_altmode_aux;
+	match = of_device_get_match_data(&pdev->dev);
+	if (match)
+		pg->client_mask = (unsigned long)match->data;
+	else
+		pg->client_mask = PMIC_GLINK_CLIENT_DEFAULT;
+
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_UCSI)) {
+		ret = pmic_glink_add_aux_device(pg, &pg->ucsi_aux, "ucsi");
+		if (ret)
+			return ret;
+	}
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_ALTMODE)) {
+		ret = pmic_glink_add_aux_device(pg, &pg->altmode_aux, "altmode");
+		if (ret)
+			goto out_release_ucsi_aux;
+	}
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_BATT)) {
+		ret = pmic_glink_add_aux_device(pg, &pg->ps_aux, "power-supply");
+		if (ret)
+			goto out_release_altmode_aux;
+	}
 
 	pg->pdr = pdr_handle_alloc(pmic_glink_pdr_callback, pg);
 	if (IS_ERR(pg->pdr)) {
@@ -278,9 +306,14 @@ static int pmic_glink_probe(struct platform_device *pdev)
 out_release_pdr_handle:
 	pdr_handle_release(pg->pdr);
 out_release_aux_devices:
-	pmic_glink_del_aux_device(pg, &pg->ps_aux);
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_BATT))
+		pmic_glink_del_aux_device(pg, &pg->ps_aux);
 out_release_altmode_aux:
-	pmic_glink_del_aux_device(pg, &pg->altmode_aux);
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_ALTMODE))
+		pmic_glink_del_aux_device(pg, &pg->altmode_aux);
+out_release_ucsi_aux:
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_UCSI))
+		pmic_glink_del_aux_device(pg, &pg->ucsi_aux);
 
 	return ret;
 }
@@ -291,8 +324,12 @@ static int pmic_glink_remove(struct platform_device *pdev)
 
 	pdr_handle_release(pg->pdr);
 
-	pmic_glink_del_aux_device(pg, &pg->ps_aux);
-	pmic_glink_del_aux_device(pg, &pg->altmode_aux);
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_BATT))
+		pmic_glink_del_aux_device(pg, &pg->ps_aux);
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_ALTMODE))
+		pmic_glink_del_aux_device(pg, &pg->altmode_aux);
+	if (pg->client_mask & BIT(PMIC_GLINK_CLIENT_UCSI))
+		pmic_glink_del_aux_device(pg, &pg->ucsi_aux);
 
 	mutex_lock(&__pmic_glink_lock);
 	__pmic_glink = NULL;
@@ -301,7 +338,13 @@ static int pmic_glink_remove(struct platform_device *pdev)
 	return 0;
 }
 
+/* Do not handle altmode for now on those platforms */
+static const unsigned long pmic_glink_sm8450_client_mask = BIT(PMIC_GLINK_CLIENT_BATT) |
+							   BIT(PMIC_GLINK_CLIENT_UCSI);
+
 static const struct of_device_id pmic_glink_of_match[] = {
+	{ .compatible = "qcom,sm8450-pmic-glink", .data = &pmic_glink_sm8450_client_mask },
+	{ .compatible = "qcom,sm8550-pmic-glink", .data = &pmic_glink_sm8450_client_mask },
 	{ .compatible = "qcom,pmic-glink", },
 	{}
 };

-- 
2.34.1