linux-kernel - [PATCH v2 2/2] usb: typec: mux: gpio-sbu: Make enable gpio optional

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Message-Id: <20240603083558.9629-3-francesco@dolcini.it>
Date: Mon,  3 Jun 2024 10:35:58 +0200
From: Francesco Dolcini <francesco@...cini.it>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Francesco Dolcini <francesco.dolcini@...adex.com>,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>
Subject: [PATCH v2 2/2] usb: typec: mux: gpio-sbu: Make enable gpio optional

From: Francesco Dolcini <francesco.dolcini@...adex.com>

The enable gpio is not required when the SBU mux is used only for
orientation, make it optional.

Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
---
v2:
 - removed useless NULL check for optional enable gpio
---
 drivers/usb/typec/mux/gpio-sbu-mux.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/mux/gpio-sbu-mux.c b/drivers/usb/typec/mux/gpio-sbu-mux.c
index 374168482d36..8902102c05a8 100644
--- a/drivers/usb/typec/mux/gpio-sbu-mux.c
+++ b/drivers/usb/typec/mux/gpio-sbu-mux.c
@@ -66,6 +66,9 @@ static int gpio_sbu_mux_set(struct typec_mux_dev *mux,
 {
 	struct gpio_sbu_mux *sbu_mux = typec_mux_get_drvdata(mux);
 
+	if (!sbu_mux->enable_gpio)
+		return -EOPNOTSUPP;
+
 	mutex_lock(&sbu_mux->lock);
 
 	switch (state->mode) {
@@ -102,7 +105,8 @@ static int gpio_sbu_mux_probe(struct platform_device *pdev)
 
 	mutex_init(&sbu_mux->lock);
 
-	sbu_mux->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+	sbu_mux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+						       GPIOD_OUT_LOW);
 	if (IS_ERR(sbu_mux->enable_gpio))
 		return dev_err_probe(dev, PTR_ERR(sbu_mux->enable_gpio),
 				     "unable to acquire enable gpio\n");
-- 
2.39.2