Re: [PATCH v3 04/12] soc: qcom: pmic_glink: register ucsi aux device

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On 09/03/2023 15:27, Neil Armstrong wrote:
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@xxxxxxxxxx>
---
  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);

This is incorrect. of_device_get_match_data() already returns match->data, rather than a matching of_device_id().

+	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", },
  	{}
  };


--
With best wishes
Dmitry




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