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[95.152.45.178]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5a4185bc58fsm5567888e87.30.2026.04.23.16.04.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Apr 2026 16:04:26 -0700 (PDT) From: bigunclemax@gmail.com To: linux-kernel@vger.kernel.org Cc: Martin Botka , Andre Przywara , Krzysztof Kozlowski , Maksim Kiselev , Philipp Zabel , Yixun Lan , Linus Walleij , Bartosz Golaszewski , linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-gpio@vger.kernel.org Subject: [RFC PATCH 1/1] reset: add support the GPIO provider with #gpio-cells=3 Date: Fri, 24 Apr 2026 02:03:35 +0300 Message-ID: <20260423230338.442497-2-bigunclemax@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260423230338.442497-1-bigunclemax@gmail.com> References: <20260423230338.442497-1-bigunclemax@gmail.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Maksim Kiselev The __reset_add_reset_gpio_device() function currently expects a GPIO provider with #gpio-cells=2, which prevents using the GPIO from controllers with #gpio-cells=3, such as the Allwinner pinctrl and others. Extend the parsing to support the GPIO phandle with three args, where: args[0]: GPIO bank args[1]: GPIO number args[2]: GPIO flags Signed-off-by: Maksim Kiselev --- drivers/reset/core.c | 33 +++++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 10 deletions(-) diff --git a/drivers/reset/core.c b/drivers/reset/core.c index 352c2360603b..18fb50ca645f 100644 --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -868,7 +868,8 @@ static int reset_add_gpio_aux_device(struct device *parent, static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) { struct property_entry properties[3] = { }; - unsigned int offset, of_flags, lflags; + unsigned int offset[2], of_flags, lflags; + struct software_node_ref_args sw_ref[1]; struct reset_gpio_lookup *rgpio_dev; struct device *parent; int id, ret, prop = 0; @@ -879,7 +880,7 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) * args[1]: GPIO flags * TODO: Handle other cases. */ - if (args->args_count != 2) + if (args->args_count != 2 && args->args_count != 3) return -ENOENT; /* @@ -889,8 +890,13 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) */ lockdep_assert_not_held(&reset_list_mutex); - offset = args->args[0]; - of_flags = args->args[1]; + offset[0] = args->args[0]; + if (args->args_count == 2) { + of_flags = args->args[1]; + } else { + offset[1] = args->args[1]; + of_flags = args->args[2]; + } /* * Later we map GPIO flags between OF and Linux, however not all @@ -902,7 +908,7 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) */ if (of_flags > GPIO_ACTIVE_LOW) { pr_err("reset-gpio code does not support GPIO flags %u for GPIO %u\n", - of_flags, offset); + of_flags, offset[0]); return -EINVAL; } @@ -923,7 +929,13 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) lflags = GPIO_PERSISTENT | (of_flags & GPIO_ACTIVE_LOW); parent = gpio_device_to_device(gdev); properties[prop++] = PROPERTY_ENTRY_STRING("compatible", "reset-gpio"); - properties[prop++] = PROPERTY_ENTRY_GPIO("reset-gpios", parent->fwnode, offset, lflags); + + if (args->args_count == 2) + sw_ref[0] = SOFTWARE_NODE_REFERENCE(parent->fwnode, offset[0], lflags); + else + sw_ref[0] = SOFTWARE_NODE_REFERENCE(parent->fwnode, offset[0], offset[1], + lflags); + properties[prop++] = PROPERTY_ENTRY_REF_ARRAY("reset-gpios", sw_ref); id = ida_alloc(&reset_gpio_ida, GFP_KERNEL); if (id < 0) @@ -1048,10 +1060,11 @@ __of_reset_control_get(struct device_node *node, const char *id, int index, goto out_unlock; } - if (WARN_ON(args.args_count != rcdev->of_reset_n_cells)) { - rstc = ERR_PTR(-EINVAL); - goto out_unlock; - } + if (!(rcdev->dev && fwnode_device_is_compatible(dev_fwnode(rcdev->dev), "reset-gpio"))) + if (WARN_ON(args.args_count != rcdev->of_reset_n_cells)) { + rstc = ERR_PTR(-EINVAL); + goto out_unlock; + } rstc_id = rcdev->of_xlate(rcdev, &args); if (rstc_id < 0) { -- 2.51.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8C693FDEE4D for ; 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[95.152.45.178]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5a4185bc58fsm5567888e87.30.2026.04.23.16.04.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Apr 2026 16:04:26 -0700 (PDT) From: bigunclemax@gmail.com To: linux-kernel@vger.kernel.org Cc: Martin Botka , Andre Przywara , Krzysztof Kozlowski , Maksim Kiselev , Philipp Zabel , Yixun Lan , Linus Walleij , Bartosz Golaszewski , linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-gpio@vger.kernel.org Subject: [RFC PATCH 1/1] reset: add support the GPIO provider with #gpio-cells=3 Date: Fri, 24 Apr 2026 02:03:35 +0300 Message-ID: <20260423230338.442497-2-bigunclemax@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260423230338.442497-1-bigunclemax@gmail.com> References: <20260423230338.442497-1-bigunclemax@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260423_160429_446128_A81D412A X-CRM114-Status: GOOD ( 14.35 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Maksim Kiselev The __reset_add_reset_gpio_device() function currently expects a GPIO provider with #gpio-cells=2, which prevents using the GPIO from controllers with #gpio-cells=3, such as the Allwinner pinctrl and others. Extend the parsing to support the GPIO phandle with three args, where: args[0]: GPIO bank args[1]: GPIO number args[2]: GPIO flags Signed-off-by: Maksim Kiselev --- drivers/reset/core.c | 33 +++++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 10 deletions(-) diff --git a/drivers/reset/core.c b/drivers/reset/core.c index 352c2360603b..18fb50ca645f 100644 --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -868,7 +868,8 @@ static int reset_add_gpio_aux_device(struct device *parent, static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) { struct property_entry properties[3] = { }; - unsigned int offset, of_flags, lflags; + unsigned int offset[2], of_flags, lflags; + struct software_node_ref_args sw_ref[1]; struct reset_gpio_lookup *rgpio_dev; struct device *parent; int id, ret, prop = 0; @@ -879,7 +880,7 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) * args[1]: GPIO flags * TODO: Handle other cases. */ - if (args->args_count != 2) + if (args->args_count != 2 && args->args_count != 3) return -ENOENT; /* @@ -889,8 +890,13 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) */ lockdep_assert_not_held(&reset_list_mutex); - offset = args->args[0]; - of_flags = args->args[1]; + offset[0] = args->args[0]; + if (args->args_count == 2) { + of_flags = args->args[1]; + } else { + offset[1] = args->args[1]; + of_flags = args->args[2]; + } /* * Later we map GPIO flags between OF and Linux, however not all @@ -902,7 +908,7 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) */ if (of_flags > GPIO_ACTIVE_LOW) { pr_err("reset-gpio code does not support GPIO flags %u for GPIO %u\n", - of_flags, offset); + of_flags, offset[0]); return -EINVAL; } @@ -923,7 +929,13 @@ static int __reset_add_reset_gpio_device(const struct of_phandle_args *args) lflags = GPIO_PERSISTENT | (of_flags & GPIO_ACTIVE_LOW); parent = gpio_device_to_device(gdev); properties[prop++] = PROPERTY_ENTRY_STRING("compatible", "reset-gpio"); - properties[prop++] = PROPERTY_ENTRY_GPIO("reset-gpios", parent->fwnode, offset, lflags); + + if (args->args_count == 2) + sw_ref[0] = SOFTWARE_NODE_REFERENCE(parent->fwnode, offset[0], lflags); + else + sw_ref[0] = SOFTWARE_NODE_REFERENCE(parent->fwnode, offset[0], offset[1], + lflags); + properties[prop++] = PROPERTY_ENTRY_REF_ARRAY("reset-gpios", sw_ref); id = ida_alloc(&reset_gpio_ida, GFP_KERNEL); if (id < 0) @@ -1048,10 +1060,11 @@ __of_reset_control_get(struct device_node *node, const char *id, int index, goto out_unlock; } - if (WARN_ON(args.args_count != rcdev->of_reset_n_cells)) { - rstc = ERR_PTR(-EINVAL); - goto out_unlock; - } + if (!(rcdev->dev && fwnode_device_is_compatible(dev_fwnode(rcdev->dev), "reset-gpio"))) + if (WARN_ON(args.args_count != rcdev->of_reset_n_cells)) { + rstc = ERR_PTR(-EINVAL); + goto out_unlock; + } rstc_id = rcdev->of_xlate(rcdev, &args); if (rstc_id < 0) { -- 2.51.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv