{"id":2198485,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2198485/?format=json","project":{"id":42,"url":"http://patchwork.ozlabs.org/api/1.0/projects/42/?format=json","name":"Linux GPIO development","link_name":"linux-gpio","list_id":"linux-gpio.vger.kernel.org","list_email":"linux-gpio@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260219-pinctrl-mux-v1-1-678d21637788@nxp.com>","date":"2026-02-19T22:23:41","name":"[1/5] mux: add devm_mux_control_get_from_np() to get mux from child node","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"2aa79ac1422c9cbbde6b5ead30d412218c0e073b","submitter":{"id":68011,"url":"http://patchwork.ozlabs.org/api/1.0/people/68011/?format=json","name":"Frank Li","email":"Frank.Li@nxp.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260219-pinctrl-mux-v1-1-678d21637788@nxp.com/mbox/","series":[{"id":492735,"url":"http://patchwork.ozlabs.org/api/1.0/series/492735/?format=json","date":"2026-02-19T22:23:40","name":"pinctrl: Add generic pinctrl for board-level mux chips","version":1,"mbox":"http://patchwork.ozlabs.org/series/492735/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2198485/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-gpio@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=nxp.com header.i=@nxp.com header.a=rsa-sha256\n header.s=selector1 header.b=PZKqbMdY;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n 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lD81rLjPi5BoM+ePNXKsFKlSXFrd9kMhgcwkzlffn9WG?=\n\t=?utf-8?q?98mxNtlcR4dM/A75rvXqlydFRxad3bkPQyldM6bIRkDld/ymWlIAsNNam6oT+uNZd?=\n\t=?utf-8?q?a9/P59H+GE?=","X-OriginatorOrg":"nxp.com","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n 65072447-83a8-4222-bac5-08de7005921c","X-MS-Exchange-CrossTenant-AuthSource":"PA4PR04MB9366.eurprd04.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"19 Feb 2026 22:23:56.3485\n (UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"686ea1d3-bc2b-4c6f-a92c-d99c5c301635","X-MS-Exchange-CrossTenant-MailboxType":"HOSTED","X-MS-Exchange-CrossTenant-UserPrincipalName":"\n H3FBcQwi7oLrPovjdcCB/8ZrHtsnCw6xujj4O+JZzlaAkYDkcyOKSOthEfYGu4DaIOehv8zGAac1Wln3I+Ef+g==","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"FRWPR04MB11281"},"content":"Add new API devm_mux_control_get_from_np() to retrieve a mux control from\na specified child device node.\n\nMake devm_mux_control_get() call devm_mux_control_get_from_np() with a NULL\nnode parameter, which defaults to using the device's own of_node.\n\nSupport the following DT schema:\n\npinctrl@0 {\n uart-func {\n mux-state = <&mux_chip 0>;\n };\n\n spi-func {\n mux-state = <&mux_chip 1>;\n };\n};\n\nSigned-off-by: Frank Li \n---\n drivers/mux/core.c | 40 ++++++++++++++++++++++++----------------\n include/linux/mux/consumer.h | 16 ++++++++++++----\n 2 files changed, 36 insertions(+), 20 deletions(-)","diff":"diff --git a/drivers/mux/core.c b/drivers/mux/core.c\nindex a3840fe0995fe0125432d34edd8ab0f2cd1a6e9a..bdd959389b4ee1b0b8a7367fadf2c148c8f2f0b1 100644\n--- a/drivers/mux/core.c\n+++ b/drivers/mux/core.c\n@@ -522,13 +522,15 @@ static struct mux_chip *of_find_mux_chip_by_node(struct device_node *np)\n * @mux_name: The name identifying the mux-control.\n * @state: Pointer to where the requested state is returned, or NULL when\n * the required multiplexer states are handled by other means.\n+ * @node: the device nodes, use dev->of_node if it is NULL.\n *\n * Return: A pointer to the mux-control, or an ERR_PTR with a negative errno.\n */\n static struct mux_control *mux_get(struct device *dev, const char *mux_name,\n-\t\t\t\t unsigned int *state)\n+\t\t\t\t unsigned int *state,\n+\t\t\t\t struct device_node *node)\n {\n-\tstruct device_node *np = dev->of_node;\n+\tstruct device_node *np = node ? node : dev->of_node;\n \tstruct of_phandle_args args;\n \tstruct mux_chip *mux_chip;\n \tunsigned int controller;\n@@ -617,7 +619,7 @@ static struct mux_control *mux_get(struct device *dev, const char *mux_name,\n */\n struct mux_control *mux_control_get(struct device *dev, const char *mux_name)\n {\n-\treturn mux_get(dev, mux_name, NULL);\n+\treturn mux_get(dev, mux_name, NULL, NULL);\n }\n EXPORT_SYMBOL_GPL(mux_control_get);\n \n@@ -641,15 +643,17 @@ static void devm_mux_control_release(struct device *dev, void *res)\n }\n \n /**\n- * devm_mux_control_get() - Get the mux-control for a device, with resource\n- *\t\t\t management.\n+ * devm_mux_control_get_from_np() - Get the mux-control for a device, with\n+ *\t\t\t\t resource management.\n * @dev: The device that needs a mux-control.\n * @mux_name: The name identifying the mux-control.\n+ * @np: the device nodes, use dev->of_node if it is NULL.\n *\n * Return: Pointer to the mux-control, or an ERR_PTR with a negative errno.\n */\n-struct mux_control *devm_mux_control_get(struct device *dev,\n-\t\t\t\t\t const char *mux_name)\n+struct mux_control *\n+devm_mux_control_get_from_np(struct device *dev, const char *mux_name,\n+\t\t\t struct device_node *np)\n {\n \tstruct mux_control **ptr, *mux;\n \n@@ -668,16 +672,18 @@ struct mux_control *devm_mux_control_get(struct device *dev,\n \n \treturn mux;\n }\n-EXPORT_SYMBOL_GPL(devm_mux_control_get);\n+EXPORT_SYMBOL_GPL(devm_mux_control_get_from_np);\n \n /*\n * mux_state_get() - Get the mux-state for a device.\n * @dev: The device that needs a mux-state.\n * @mux_name: The name identifying the mux-state.\n+ * @np: the device nodes, use dev->of_node if it is NULL.\n *\n * Return: A pointer to the mux-state, or an ERR_PTR with a negative errno.\n */\n-static struct mux_state *mux_state_get(struct device *dev, const char *mux_name)\n+static struct mux_state *\n+mux_state_get(struct device *dev, const char *mux_name, struct device_node *np)\n {\n \tstruct mux_state *mstate;\n \n@@ -685,7 +691,7 @@ static struct mux_state *mux_state_get(struct device *dev, const char *mux_name)\n \tif (!mstate)\n \t\treturn ERR_PTR(-ENOMEM);\n \n-\tmstate->mux = mux_get(dev, mux_name, &mstate->state);\n+\tmstate->mux = mux_get(dev, mux_name, &mstate->state, np);\n \tif (IS_ERR(mstate->mux)) {\n \t\tint err = PTR_ERR(mstate->mux);\n \n@@ -716,15 +722,17 @@ static void devm_mux_state_release(struct device *dev, void *res)\n }\n \n /**\n- * devm_mux_state_get() - Get the mux-state for a device, with resource\n- *\t\t\t management.\n+ * devm_mux_state_get_from_np() - Get the mux-state for a device, with resource\n+ *\t\t\t\t management.\n * @dev: The device that needs a mux-control.\n * @mux_name: The name identifying the mux-control.\n+ * @np: the device nodes, use dev->of_node if it is NULL.\n *\n * Return: Pointer to the mux-state, or an ERR_PTR with a negative errno.\n */\n-struct mux_state *devm_mux_state_get(struct device *dev,\n-\t\t\t\t const char *mux_name)\n+struct mux_state *\n+devm_mux_state_get_from_np(struct device *dev, const char *mux_name,\n+\t\t\t struct device_node *np)\n {\n \tstruct mux_state **ptr, *mstate;\n \n@@ -732,7 +740,7 @@ struct mux_state *devm_mux_state_get(struct device *dev,\n \tif (!ptr)\n \t\treturn ERR_PTR(-ENOMEM);\n \n-\tmstate = mux_state_get(dev, mux_name);\n+\tmstate = mux_state_get(dev, mux_name, np);\n \tif (IS_ERR(mstate)) {\n \t\tdevres_free(ptr);\n \t\treturn mstate;\n@@ -743,7 +751,7 @@ struct mux_state *devm_mux_state_get(struct device *dev,\n \n \treturn mstate;\n }\n-EXPORT_SYMBOL_GPL(devm_mux_state_get);\n+EXPORT_SYMBOL_GPL(devm_mux_state_get_from_np);\n \n /*\n * Using subsys_initcall instead of module_init here to try to ensure - for\ndiff --git a/include/linux/mux/consumer.h b/include/linux/mux/consumer.h\nindex 2e25c838f8312532040441ee618424b76378aad7..6300e091035323dd6158d52a55a109d43ef120aa 100644\n--- a/include/linux/mux/consumer.h\n+++ b/include/linux/mux/consumer.h\n@@ -56,9 +56,17 @@ int mux_state_deselect(struct mux_state *mstate);\n struct mux_control *mux_control_get(struct device *dev, const char *mux_name);\n void mux_control_put(struct mux_control *mux);\n \n-struct mux_control *devm_mux_control_get(struct device *dev,\n-\t\t\t\t\t const char *mux_name);\n-struct mux_state *devm_mux_state_get(struct device *dev,\n-\t\t\t\t const char *mux_name);\n+struct mux_control *\n+devm_mux_control_get_from_np(struct device *dev, const char *mux_name,\n+\t\t\t struct device_node *np);\n+\n+#define devm_mux_control_get(dev, mux_name)\t\t\\\n+\tdevm_mux_control_get_from_np(dev, mux_name, NULL)\n+\n+struct mux_state *\n+devm_mux_state_get_from_np(struct device *dev, const char *mux_name,\n+\t\t\t struct device_node *np);\n+#define devm_mux_state_get(dev, mux_name)\t\t\\\n+\tdevm_mux_state_get_from_np(dev, mux_name, NULL)\n \n #endif /* _LINUX_MUX_CONSUMER_H */\n","prefixes":["1/5"]}