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Thu, 20 Mar 2025 04:56:42 -0700 (PDT) From: srinivas.kandagatla@linaro.org To: peda@axentia.se, broonie@kernel.org, andersson@kernel.org, krzk+dt@kernel.org Cc: ivprusov@salutedevices.com, luca.ceresoli@bootlin.com, zhoubinbin@loongson.cn, paulha@opensource.cirrus.com, lgirdwood@gmail.com, robh@kernel.org, conor+dt@kernel.org, konradybcio@kernel.org, perex@perex.cz, tiwai@suse.com, dmitry.baryshkov@oss.qualcomm.com, linux-sound@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, johan+linaro@kernel.org, Srinivas Kandagatla Subject: [PATCH v2 2/5] mux: gpio: add optional regulator support Date: Thu, 20 Mar 2025 11:56:30 +0000 Message-Id: <20250320115633.4248-3-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250320115633.4248-1-srinivas.kandagatla@linaro.org> References: <20250320115633.4248-1-srinivas.kandagatla@linaro.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Srinivas Kandagatla Some of the external muxes needs powering up using a regulator. This is the case with Lenovo T14s laptop which has a external audio mux to handle US/EURO headsets. Add support to the driver to handle this optional regulator. Signed-off-by: Srinivas Kandagatla --- drivers/mux/gpio.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mux/gpio.c b/drivers/mux/gpio.c index cc5f2c1861d4..12cd9b5c32fb 100644 --- a/drivers/mux/gpio.c +++ b/drivers/mux/gpio.c @@ -15,6 +15,7 @@ #include #include #include +#include =20 struct mux_gpio { struct gpio_descs *gpios; @@ -82,6 +83,13 @@ static int mux_gpio_probe(struct platform_device *pdev) mux_chip->mux->idle_state =3D idle_state; } =20 + ret =3D devm_regulator_get_enable_optional(dev, "mux"); + if (ret && ret !=3D -ENODEV) { + if (ret !=3D -EPROBE_DEFER) + dev_err(dev, "Couldn't retrieve/enable gpio mux supply\n"); + return ret; + } + ret =3D devm_mux_chip_register(dev, mux_chip); if (ret < 0) return ret; --=20 2.39.5