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Tue, 10 Nov 2026 05:09:16 +0000 (UTC) From: Xianwei Zhao via B4 Relay Date: Tue, 10 Nov 2026 05:09:12 +0000 Subject: [PATCH v2] pinctrl: amlogic: a4: Allow functions without groups X-Archived-By: MIME-Version: 1.0 Message-Id: <20261110-debug-info-v2-1-73ad7aa0874b@amlogic.com> X-B4-Tracking: v=1; b=H4sIAPim8moC/22MQQ6CMBAAv0L27Bq22hI9+Q/DgZYtbCKUtEo0p H+3cvY4k8xskDgKJ7hWG0ReJUmYC6hDBW7s5oFR+sKgamWIaoM929eAMvuA1uri+GQaaqAES2Q v7312bwuPkp4hfvb3Sj/7d7MSEtamcdppffYXunXTIwziji5M0Oacv4gh8L2mAAAA X-Change-ID: 20261106-debug-info-bb5611e36717 To: Linus Walleij , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl Cc: linux-amlogic@lists.infradead.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Xianwei Zhao X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1794287355; l=2644; i=xianwei.zhao@amlogic.com; s=20251216; h=from:subject:message-id; bh=sWD7zbg1mSXOEg9K8sOVvNf5EChgrS2CCVGEpGmu0uo=; b=Bn+UorY0bcUbavYtuQe7WCJiVKPEGNSMK8QgR2s6loKCX7ROkp3eRi8Rgestk9kEQdi97vDnV gPVKPwqjHjMCFU6ZIImK8Ma4yH99sq5pnmF1eeZVaotV47oXxU4ZJuA X-Developer-Key: i=xianwei.zhao@amlogic.com; a=ed25519; pk=dWwxtWCxC6FHRurOmxEtr34SuBYU+WJowV/ZmRJ7H+k= X-Endpoint-Received: by B4 Relay for xianwei.zhao@amlogic.com/20251216 with auth_id=578 X-Original-From: Xianwei Zhao X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: xianwei.zhao@amlogic.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" X-Spam-Status: No, score=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 From: Xianwei Zhao Allow function nodes without child groups during device tree parsing instead of returning an error. Only count and parse nodes with the "func-" prefix as pinctrl functions, ignoring other non-GPIO child nodes. This allows the driver to support function nodes without groups and avoid treating unrelated device tree nodes as pinctrl functions. Signed-off-by: Xianwei Zhao --- Add debugging information for error dts and Error pinctrl config not affect normal pin work. --- Changes in v2: - Reserve banks nfunctions and ngroups no-zero judgement and update commit message simultaneously. - Link to v1: https://lore.kernel.org/r/20261106-debug-info-v1-1-067c5c554f91@amlogic.com --- drivers/pinctrl/meson/pinctrl-amlogic-a4.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/pinctrl/meson/pinctrl-amlogic-a4.c b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c index 39eb8cc7fc0d..bd12f6fa3d4d 100644 --- a/drivers/pinctrl/meson/pinctrl-amlogic-a4.c +++ b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c @@ -821,8 +821,10 @@ static int aml_pctl_parse_functions(struct device_node *np, func = &info->functions[index]; func->name = np->name; func->ngroups = of_get_child_count(np); - if (func->ngroups == 0) - return dev_err_probe(dev, -EINVAL, "No groups defined\n"); + if (func->ngroups == 0) { + dev_dbg(dev, "func %s No groups defined\n", func->name); + return 0; + } func->groups = devm_kcalloc(dev, func->ngroups, sizeof(*func->groups), GFP_KERNEL); if (!func->groups) @@ -899,8 +901,12 @@ static void aml_pctl_dt_child_count(struct aml_pinctrl *info, if (of_property_read_bool(child, "gpio-controller")) { info->nbanks++; } else { - info->nfunctions++; - info->ngroups += of_get_child_count(child); + if (!strncmp(child->name, "func-", 5)) { + info->nfunctions++; + info->ngroups += of_get_child_count(child); + } else { + dev_dbg(info->dev, "func node defined err %s\n", child->name); + } } } } @@ -1166,10 +1172,11 @@ static int aml_pctl_probe_dt(struct platform_device *pdev, } bank++; } else { - ret = aml_pctl_parse_functions(child, info, - i++, &grp_index); - if (ret) - return ret; + if (!strncmp(child->name, "func-", 5)) { + ret = aml_pctl_parse_functions(child, info, i++, &grp_index); + if (ret) + return ret; + } } } --- base-commit: 89edcad9f23925f5706b7555b02165d1990444d5 change-id: 20261106-debug-info-bb5611e36717 Best regards, -- Xianwei Zhao _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic