From 05e58da46d8e8f8b29bc9b47053bb0637891c06f Mon Sep 17 00:00:00 2001 From: Frank Li Date: Mon, 4 May 2026 19:54:35 -0400 Subject: mux: add devm_mux_state_get_from_np() to get mux from child node Add new API devm_mux_state_get_from_np() to retrieve a mux control from a specified child device node. Make devm_mux_state_get() call devm_mux_state_get_from_np() with a NULL node parameter, which defaults to using the device's own of_node. Support the following DT schema: pinctrl@0 { uart-func { mux-state = <&mux_chip 0>; }; spi-func { mux-state = <&mux_chip 1>; }; }; Signed-off-by: Frank Li Signed-off-by: Linus Walleij --- include/linux/mux/consumer.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/mux/consumer.h b/include/linux/mux/consumer.h index a961861a503b..449e38e6e2c5 100644 --- a/include/linux/mux/consumer.h +++ b/include/linux/mux/consumer.h @@ -60,7 +60,10 @@ struct mux_control *mux_control_get_optional(struct device *dev, const char *mux void mux_control_put(struct mux_control *mux); struct mux_control *devm_mux_control_get(struct device *dev, const char *mux_name); -struct mux_state *devm_mux_state_get(struct device *dev, const char *mux_name); + +struct mux_state * +devm_mux_state_get_from_np(struct device *dev, const char *mux_name, struct device_node *np); + struct mux_state *devm_mux_state_get_optional(struct device *dev, const char *mux_name); struct mux_state *devm_mux_state_get_selected(struct device *dev, const char *mux_name); struct mux_state *devm_mux_state_get_optional_selected(struct device *dev, const char *mux_name); @@ -161,4 +164,7 @@ static inline struct mux_state *devm_mux_state_get_optional_selected(struct devi #endif /* CONFIG_MULTIPLEXER */ +#define devm_mux_state_get(dev, mux_name) \ + devm_mux_state_get_from_np(dev, mux_name, NULL) + #endif /* _LINUX_MUX_CONSUMER_H */ -- cgit v1.2.3 From 418a2bbdee2927d543db6913073d0e7ec8b540ee Mon Sep 17 00:00:00 2001 From: Frank Li Date: Mon, 4 May 2026 19:54:38 -0400 Subject: pinctrl: add optional .release_mux() callback Add an optional .release_mux() callback to struct pinmux_ops. Some drivers acquire additional resources in .set_mux(), such as software locks. These resources may need to be released when the mux function is no longer active. Introducing a dedicated .release_mux() callback allows drivers to clean up such resources. The callback is optional and does not affect existing drivers. Commit 2243a87d90b42 ("pinctrl: avoid duplicated calling enable_pinmux_setting for a pin") removed the .disable() callback to resolve two issues: 1. desc->mux_usecount increasing monotonically 2. Hardware glitches caused by repeated .disable()/.enable() calls Adding .release_mux() does not reintroduce those problems. The callback is intended only for releasing driver-side resources (e.g. locks) and must not modify hardware registers. Signed-off-by: Frank Li Signed-off-by: Linus Walleij --- include/linux/pinctrl/pinmux.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include') diff --git a/include/linux/pinctrl/pinmux.h b/include/linux/pinctrl/pinmux.h index 094bbe2fd6fd..77664937eeb2 100644 --- a/include/linux/pinctrl/pinmux.h +++ b/include/linux/pinctrl/pinmux.h @@ -51,6 +51,8 @@ struct pinctrl_gpio_range; * are handled by the pinmux subsystem. The @func_selector selects a * certain function whereas @group_selector selects a certain set of pins * to be used. On simple controllers the latter argument may be ignored + * @release_mux: Release software resources acquired by @set_mux. This callback + * must not change hardware state to avoid glitches when switching mux. * @gpio_request_enable: requests and enables GPIO on a certain pin. * Implement this only if you can mux every pin individually as GPIO. The * affected GPIO range is passed along with an offset(pin number) into that @@ -80,6 +82,9 @@ struct pinmux_ops { unsigned int selector); int (*set_mux) (struct pinctrl_dev *pctldev, unsigned int func_selector, unsigned int group_selector); + void (*release_mux) (struct pinctrl_dev *pctldev, + unsigned int func_selector, + unsigned int group_selector); int (*gpio_request_enable) (struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int offset); -- cgit v1.2.3 From 0942cdb8f4b14cbfdc1996c2c332c6402a203bf3 Mon Sep 17 00:00:00 2001 From: Luca Leonardo Scorcia Date: Mon, 20 Apr 2026 22:30:03 +0100 Subject: dt-bindings: pinctrl: mediatek,mt65xx: Add MT6392 pinctrl Add a compatible for the pinctrl device of the MT6392 PMIC, a variant of the already supported MT6397. Signed-off-by: Luca Leonardo Scorcia Reviewed-by: AngeloGioacchino Del Regno Acked-by: Rob Herring (Arm) Signed-off-by: Linus Walleij --- .../dt-bindings/pinctrl/mediatek,mt6392-pinfunc.h | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 include/dt-bindings/pinctrl/mediatek,mt6392-pinfunc.h (limited to 'include') diff --git a/include/dt-bindings/pinctrl/mediatek,mt6392-pinfunc.h b/include/dt-bindings/pinctrl/mediatek,mt6392-pinfunc.h new file mode 100644 index 000000000000..c65278c8103d --- /dev/null +++ b/include/dt-bindings/pinctrl/mediatek,mt6392-pinfunc.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +#ifndef __DTS_MT6392_PINFUNC_H +#define __DTS_MT6392_PINFUNC_H + +#include + +#define MT6392_PIN_0_INT__FUNC_GPIO0 (MTK_PIN_NO(0) | 0) +#define MT6392_PIN_0_INT__FUNC_INT (MTK_PIN_NO(0) | 1) +#define MT6392_PIN_0_INT__FUNC_TEST_CK2 (MTK_PIN_NO(0) | 5) +#define MT6392_PIN_0_INT__FUNC_TEST_IN1 (MTK_PIN_NO(0) | 6) +#define MT6392_PIN_0_INT__FUNC_TEST_OUT1 (MTK_PIN_NO(0) | 7) + +#define MT6392_PIN_1_SRCLKEN__FUNC_GPIO1 (MTK_PIN_NO(1) | 0) +#define MT6392_PIN_1_SRCLKEN__FUNC_SRCLKEN (MTK_PIN_NO(1) | 1) +#define MT6392_PIN_1_SRCLKEN__FUNC_TEST_CK0 (MTK_PIN_NO(1) | 5) +#define MT6392_PIN_1_SRCLKEN__FUNC_TEST_IN2 (MTK_PIN_NO(1) | 6) +#define MT6392_PIN_1_SRCLKEN__FUNC_TEST_OUT2 (MTK_PIN_NO(1) | 7) + +#define MT6392_PIN_2_RTC_32K1V8__FUNC_GPIO2 (MTK_PIN_NO(2) | 0) +#define MT6392_PIN_2_RTC_32K1V8__FUNC_RTC_32K1V8 (MTK_PIN_NO(2) | 1) +#define MT6392_PIN_2_RTC_32K1V8__FUNC_TEST_CK1 (MTK_PIN_NO(2) | 5) +#define MT6392_PIN_2_RTC_32K1V8__FUNC_TEST_IN3 (MTK_PIN_NO(2) | 6) +#define MT6392_PIN_2_RTC_32K1V8__FUNC_TEST_OUT3 (MTK_PIN_NO(2) | 7) + +#define MT6392_PIN_3_SPI_CLK__FUNC_GPIO3 (MTK_PIN_NO(3) | 0) +#define MT6392_PIN_3_SPI_CLK__FUNC_SPI_CLK (MTK_PIN_NO(3) | 1) + +#define MT6392_PIN_4_SPI_CSN__FUNC_GPIO4 (MTK_PIN_NO(4) | 0) +#define MT6392_PIN_4_SPI_CSN__FUNC_SPI_CSN (MTK_PIN_NO(4) | 1) + +#define MT6392_PIN_5_SPI_MOSI__FUNC_GPIO5 (MTK_PIN_NO(5) | 0) +#define MT6392_PIN_5_SPI_MOSI__FUNC_SPI_MOSI (MTK_PIN_NO(5) | 1) + +#define MT6392_PIN_6_SPI_MISO__FUNC_GPIO6 (MTK_PIN_NO(6) | 0) +#define MT6392_PIN_6_SPI_MISO__FUNC_SPI_MISO (MTK_PIN_NO(6) | 1) +#define MT6392_PIN_6_SPI_MISO__FUNC_TEST_IN4 (MTK_PIN_NO(6) | 6) +#define MT6392_PIN_6_SPI_MISO__FUNC_TEST_OUT4 (MTK_PIN_NO(6) | 7) + +#endif /* __DTS_MT6392_PINFUNC_H */ -- cgit v1.2.3