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([10.223.165.88]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2023 01:19:40 -0700 From: Rajat Khandelwal To: heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Rajat Khandelwal Subject: [PATCH v2] usb: typec: intel_pmc_mux: Expose IOM port status to debugfs Date: Fri, 14 Apr 2023 13:49:10 +0530 Message-Id: <20230414081910.1336405-1-rajat.khandelwal@linux.intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763139285204811104?= X-GMAIL-MSGID: =?utf-8?q?1763139285204811104?= IOM status has a crucial role during debugging to check the current state of the type-C port. There are ways to fetch the status, but all those require the IOM port status offset, which could change with platform. Make a debugfs directory for intel_pmc_mux and expose the status under it per port basis. Signed-off-by: Rajat Khandelwal --- v2: 1. Remove static declaration of the debugfs root for 'intel_pmc_mux' 2. Remove explicitly defined one-liner functions drivers/usb/typec/mux/intel_pmc_mux.c | 34 +++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c index 34e4188a40ff..1d43b111781e 100644 --- a/drivers/usb/typec/mux/intel_pmc_mux.c +++ b/drivers/usb/typec/mux/intel_pmc_mux.c @@ -15,6 +15,7 @@ #include #include #include +#include #include @@ -639,9 +640,34 @@ static int pmc_usb_probe_iom(struct pmc_usb *pmc) return 0; } +static int port_iom_status_show(struct seq_file *s, void *unused) +{ + struct pmc_usb_port *port = s->private; + + update_port_status(port); + seq_printf(s, "0x%08x\n", port->iom_status); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(port_iom_status); + +static void pmc_mux_port_debugfs_init(struct pmc_usb_port *port, + struct dentry *pmc_mux_debugfs_root) +{ + struct dentry *debugfs_dir; + char name[6]; + + snprintf(name, sizeof(name), "port%d", port->usb3_port - 1); + + debugfs_dir = debugfs_create_dir(name, pmc_mux_debugfs_root); + debugfs_create_file("iom_status", 0400, debugfs_dir, port, + &port_iom_status_fops); +} + static int pmc_usb_probe(struct platform_device *pdev) { struct fwnode_handle *fwnode = NULL; + struct dentry *pmc_mux_debugfs_root; struct pmc_usb *pmc; int i = 0; int ret; @@ -674,6 +700,8 @@ static int pmc_usb_probe(struct platform_device *pdev) if (ret) return ret; + pmc_mux_debugfs_root = debugfs_create_dir("intel_pmc_mux", NULL); + /* * For every physical USB connector (USB2 and USB3 combo) there is a * child ACPI device node under the PMC mux ACPI device object. @@ -688,6 +716,8 @@ static int pmc_usb_probe(struct platform_device *pdev) fwnode_handle_put(fwnode); goto err_remove_ports; } + + pmc_mux_port_debugfs_init(&pmc->port[i], pmc_mux_debugfs_root); } platform_set_drvdata(pdev, pmc); @@ -703,6 +733,8 @@ static int pmc_usb_probe(struct platform_device *pdev) acpi_dev_put(pmc->iom_adev); + debugfs_lookup_and_remove("intel_pmc_mux", NULL); + return ret; } @@ -719,6 +751,8 @@ static int pmc_usb_remove(struct platform_device *pdev) acpi_dev_put(pmc->iom_adev); + debugfs_lookup_and_remove("intel_pmc_mux", NULL); + return 0; }