linux-kernel - [PATCH v2] soc: qcom: pmic_glink_altmode: Print return value on error

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Date:   Tue, 17 Oct 2023 10:00:23 +0200
From:   Luca Weiss <luca.weiss@...rphone.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH v2] soc: qcom: pmic_glink_altmode: Print return value on
 error

It can be useful to know with which return value for example the
typec_retimer_set call failed, so include this info in the dev_err
prints.

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
Changes in v2:
- Add ret to print in more prints, not just typec_retimer_set (Bjorn)
- Link to v1: https://lore.kernel.org/r/20231013-glink-altmode-ret-v1-1-77941537a35b@fairphone.com
---
 drivers/soc/qcom/pmic_glink_altmode.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/soc/qcom/pmic_glink_altmode.c b/drivers/soc/qcom/pmic_glink_altmode.c
index 9569d999391d..0a75bfac5e02 100644
--- a/drivers/soc/qcom/pmic_glink_altmode.c
+++ b/drivers/soc/qcom/pmic_glink_altmode.c
@@ -160,7 +160,7 @@ static void pmic_glink_altmode_enable_dp(struct pmic_glink_altmode *altmode,
 
 	ret = typec_mux_set(port->typec_mux, &port->state);
 	if (ret)
-		dev_err(altmode->dev, "failed to switch mux to DP\n");
+		dev_err(altmode->dev, "failed to switch mux to DP: %d\n", ret);
 
 	port->retimer_state.alt = &port->dp_alt;
 	port->retimer_state.data = &dp_data;
@@ -168,7 +168,7 @@ static void pmic_glink_altmode_enable_dp(struct pmic_glink_altmode *altmode,
 
 	ret = typec_retimer_set(port->typec_retimer, &port->retimer_state);
 	if (ret)
-		dev_err(altmode->dev, "failed to setup retimer to DP\n");
+		dev_err(altmode->dev, "failed to setup retimer to DP: %d\n", ret);
 }
 
 static void pmic_glink_altmode_enable_usb(struct pmic_glink_altmode *altmode,
@@ -182,7 +182,7 @@ static void pmic_glink_altmode_enable_usb(struct pmic_glink_altmode *altmode,
 
 	ret = typec_mux_set(port->typec_mux, &port->state);
 	if (ret)
-		dev_err(altmode->dev, "failed to switch mux to USB\n");
+		dev_err(altmode->dev, "failed to switch mux to USB: %d\n", ret);
 
 	port->retimer_state.alt = NULL;
 	port->retimer_state.data = NULL;
@@ -190,7 +190,7 @@ static void pmic_glink_altmode_enable_usb(struct pmic_glink_altmode *altmode,
 
 	ret = typec_retimer_set(port->typec_retimer, &port->retimer_state);
 	if (ret)
-		dev_err(altmode->dev, "failed to setup retimer to USB\n");
+		dev_err(altmode->dev, "failed to setup retimer to USB: %d\n", ret);
 }
 
 static void pmic_glink_altmode_safe(struct pmic_glink_altmode *altmode,
@@ -204,7 +204,7 @@ static void pmic_glink_altmode_safe(struct pmic_glink_altmode *altmode,
 
 	ret = typec_mux_set(port->typec_mux, &port->state);
 	if (ret)
-		dev_err(altmode->dev, "failed to switch mux to safe mode\n");
+		dev_err(altmode->dev, "failed to switch mux to safe mode: %d\n", ret);
 
 	port->retimer_state.alt = NULL;
 	port->retimer_state.data = NULL;
@@ -212,7 +212,7 @@ static void pmic_glink_altmode_safe(struct pmic_glink_altmode *altmode,
 
 	ret = typec_retimer_set(port->typec_retimer, &port->retimer_state);
 	if (ret)
-		dev_err(altmode->dev, "failed to setup retimer to USB\n");
+		dev_err(altmode->dev, "failed to setup retimer to USB: %d\n", ret);
 }
 
 static void pmic_glink_altmode_worker(struct work_struct *work)
@@ -397,7 +397,7 @@ static void pmic_glink_altmode_enable_worker(struct work_struct *work)
 
 	ret = pmic_glink_altmode_request(altmode, ALTMODE_PAN_EN, 0);
 	if (ret)
-		dev_err(altmode->dev, "failed to request altmode notifications\n");
+		dev_err(altmode->dev, "failed to request altmode notifications: %d\n", ret);
 }
 
 static void pmic_glink_altmode_pdr_notify(void *priv, int state)

---
base-commit: e3b18f7200f45d66f7141136c25554ac1e82009b
change-id: 20231013-glink-altmode-ret-3911e6c1eab5

Best regards,
-- 
Luca Weiss <luca.weiss@...rphone.com>