linux-kernel - [PATCH RFC 2/5] pinctrl: qcom: add infrastructure for marking pin functions as GPIOs

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Message-Id: <20250702-pinctrl-gpio-pinfuncs-v1-2-ed2bd0f9468d@linaro.org>
Date: Wed, 02 Jul 2025 10:45:32 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, 
 Alexey Klimov <alexey.klimov@...aro.org>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH RFC 2/5] pinctrl: qcom: add infrastructure for marking pin
 functions as GPIOs

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Add a helper macro that wraps PINCTRL_GPIO_PINFUNCTION() for pinctrl-msm
pin functions and implement the .function_is_gpio() callback.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/pinctrl/qcom/pinctrl-msm.c | 9 +++++++++
 drivers/pinctrl/qcom/pinctrl-msm.h | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index f713c80d7f3eda06de027cd539e8decd4412876a..bb1e5aca058fc28c3cc823876c8fe7880d66b6fa 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -286,10 +286,19 @@ static int msm_pinmux_request_gpio(struct pinctrl_dev *pctldev,
 	return msm_pinmux_set_mux(pctldev, g->funcs[pctrl->soc->gpio_func], offset);
 }
 
+static bool msm_pinmux_function_is_gpio(struct pinctrl_dev *pctldev,
+					unsigned int selector)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+	return (pctrl->soc->functions[selector].flags & PINFUNCTION_FLAG_GPIO);
+}
+
 static const struct pinmux_ops msm_pinmux_ops = {
 	.request		= msm_pinmux_request,
 	.get_functions_count	= msm_get_functions_count,
 	.get_function_name	= msm_get_function_name,
+	.function_is_gpio	= msm_pinmux_function_is_gpio,
 	.get_function_groups	= msm_get_function_groups,
 	.gpio_request_enable	= msm_pinmux_request_gpio,
 	.set_mux		= msm_pinmux_set_mux,
diff --git a/drivers/pinctrl/qcom/pinctrl-msm.h b/drivers/pinctrl/qcom/pinctrl-msm.h
index d7dc0947bb161868c8f433dc2536719b8afc8bd8..4625fa5320a95a4d24e3a0c98a249e4f163dd4c7 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.h
+++ b/drivers/pinctrl/qcom/pinctrl-msm.h
@@ -29,6 +29,11 @@ struct pinctrl_pin_desc;
 					fname##_groups,		\
 					ARRAY_SIZE(fname##_groups))
 
+#define MSM_GPIO_PIN_FUNCTION(fname)				\
+	[msm_mux_##fname] = PINCTRL_GPIO_PINFUNCTION(#fname,	\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
 #define QCA_PIN_FUNCTION(fname)					\
 	[qca_mux_##fname] = PINCTRL_PINFUNCTION(#fname,		\
 					fname##_groups,		\

-- 
2.48.1