From patchwork Mon Jul 24 05:07:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 706547 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D3C4C001DE for ; Mon, 24 Jul 2023 05:07:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229684AbjGXFHe (ORCPT ); Mon, 24 Jul 2023 01:07:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229717AbjGXFHb (ORCPT ); Mon, 24 Jul 2023 01:07:31 -0400 Received: from muru.com (muru.com [72.249.23.125]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 59AF3E41; Sun, 23 Jul 2023 22:07:24 -0700 (PDT) Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 0AE9382CF; Mon, 24 Jul 2023 05:07:21 +0000 (UTC) From: Tony Lindgren To: Greg Kroah-Hartman , Jiri Slaby , Andy Shevchenko Cc: Andy Shevchenko , Dhruva Gole , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , John Ogness , Johan Hovold , Sebastian Andrzej Siewior , Vignesh Raghavendra , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v4 1/3] serial: core: Controller id cannot be negative Date: Mon, 24 Jul 2023 08:07:03 +0300 Message-ID: <20230724050709.17544-2-tony@atomide.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230724050709.17544-1-tony@atomide.com> References: <20230724050709.17544-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org The controller id cannot be negative. Let's fix the ctrl_id in preparation for adding port_id to fix the device name. Fixes: 84a9582fd203 ("serial: core: Start managing serial controllers to enable runtime PM") Reported-by: Andy Shevchenko Andy Shevchenko Signed-off-by: Tony Lindgren --- include/linux/serial_core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -459,7 +459,7 @@ struct uart_port { struct serial_rs485 *rs485); int (*iso7816_config)(struct uart_port *, struct serial_iso7816 *iso7816); - int ctrl_id; /* optional serial core controller id */ + unsigned int ctrl_id; /* optional serial core controller id */ unsigned int irq; /* irq number */ unsigned long irqflags; /* irq flags */ unsigned int uartclk; /* base uart clock */ From patchwork Mon Jul 24 05:07:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 706093 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43C8EC001B0 for ; Mon, 24 Jul 2023 05:07:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229747AbjGXFHg (ORCPT ); Mon, 24 Jul 2023 01:07:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229749AbjGXFHd (ORCPT ); Mon, 24 Jul 2023 01:07:33 -0400 Received: from muru.com (muru.com [72.249.23.125]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 8FACDE5C; Sun, 23 Jul 2023 22:07:29 -0700 (PDT) Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 3E54A809F; Mon, 24 Jul 2023 05:07:27 +0000 (UTC) From: Tony Lindgren To: Greg Kroah-Hartman , Jiri Slaby , Andy Shevchenko Cc: Andy Shevchenko , Dhruva Gole , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , John Ogness , Johan Hovold , Sebastian Andrzej Siewior , Vignesh Raghavendra , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v4 2/3] serial: core: Fix serial core port id to not use port->line Date: Mon, 24 Jul 2023 08:07:04 +0300 Message-ID: <20230724050709.17544-3-tony@atomide.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230724050709.17544-1-tony@atomide.com> References: <20230724050709.17544-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org The serial core port id should be serial core controller specific port instance, which is not always the port->line index. For example, 8250 driver maps a number of legacy ports, and when a hardware specific device driver takes over, we typically have one driver instance for each port. Let's instead add port->port_id to keep track serial ports mapped to each serial core controller instance. Currently this is only a cosmetic issue for the serial core port device names. The issue can be noticed looking at /sys/bus/serial-base/devices for example though. Let's fix the issue to avoid port addressing issues later on. Fixes: 84a9582fd203 ("serial: core: Start managing serial controllers to enable runtime PM") Andy Shevchenko Signed-off-by: Tony Lindgren --- drivers/tty/serial/8250/8250_core.c | 2 ++ drivers/tty/serial/serial_base_bus.c | 2 +- include/linux/serial_core.h | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -497,6 +497,7 @@ static struct uart_8250_port *serial8250_setup_port(int index) up = &serial8250_ports[index]; up->port.line = index; + up->port.port_id = index; serial8250_init_port(up); if (!base_ops) @@ -1040,6 +1041,7 @@ int serial8250_register_8250_port(const struct uart_8250_port *up) uart_remove_one_port(&serial8250_reg, &uart->port); uart->port.ctrl_id = up->port.ctrl_id; + uart->port.port_id = up->port.port_id; uart->port.iobase = up->port.iobase; uart->port.membase = up->port.membase; uart->port.irq = up->port.irq; diff --git a/drivers/tty/serial/serial_base_bus.c b/drivers/tty/serial/serial_base_bus.c --- a/drivers/tty/serial/serial_base_bus.c +++ b/drivers/tty/serial/serial_base_bus.c @@ -136,7 +136,7 @@ struct serial_port_device *serial_base_port_add(struct uart_port *port, err = serial_base_device_init(port, &port_dev->dev, &ctrl_dev->dev, &serial_port_type, serial_base_port_release, - port->line); + port->port_id); if (err) goto err_put_device; diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -460,6 +460,7 @@ struct uart_port { int (*iso7816_config)(struct uart_port *, struct serial_iso7816 *iso7816); unsigned int ctrl_id; /* optional serial core controller id */ + unsigned int port_id; /* optional serial core port id */ unsigned int irq; /* irq number */ unsigned long irqflags; /* irq flags */ unsigned int uartclk; /* base uart clock */ From patchwork Mon Jul 24 05:07:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 706546 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0FE07C001B0 for ; Mon, 24 Jul 2023 05:08:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229899AbjGXFIB (ORCPT ); Mon, 24 Jul 2023 01:08:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229717AbjGXFHj (ORCPT ); Mon, 24 Jul 2023 01:07:39 -0400 Received: from muru.com (muru.com [72.249.23.125]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id BC85CE59; Sun, 23 Jul 2023 22:07:34 -0700 (PDT) Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 3BE3982CF; Mon, 24 Jul 2023 05:07:32 +0000 (UTC) From: Tony Lindgren To: Greg Kroah-Hartman , Jiri Slaby , Andy Shevchenko Cc: Andy Shevchenko , Dhruva Gole , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , John Ogness , Johan Hovold , Sebastian Andrzej Siewior , Vignesh Raghavendra , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v4 3/3] serial: core: Fix serial core controller port name to show controller id Date: Mon, 24 Jul 2023 08:07:05 +0300 Message-ID: <20230724050709.17544-4-tony@atomide.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230724050709.17544-1-tony@atomide.com> References: <20230724050709.17544-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org We are missing the serial core controller id for the serial core port name. Let's fix the issue for sane /sys/bus/serial-core/devices, and to avoid issues addressing serial ports later on. Fixes: 84a9582fd203 ("serial: core: Start managing serial controllers to enable runtime PM") Reported-by: Andy Shevchenko Andy Shevchenko Signed-off-by: Tony Lindgren --- drivers/tty/serial/serial_base_bus.c | 34 ++++++++++++++++++---------- 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/drivers/tty/serial/serial_base_bus.c b/drivers/tty/serial/serial_base_bus.c --- a/drivers/tty/serial/serial_base_bus.c +++ b/drivers/tty/serial/serial_base_bus.c @@ -19,6 +19,14 @@ static bool serial_base_initialized; +static const struct device_type serial_ctrl_type = { + .name = "ctrl", +}; + +static const struct device_type serial_port_type = { + .name = "port", +}; + static int serial_base_match(struct device *dev, struct device_driver *drv) { int len = strlen(drv->name); @@ -48,7 +56,8 @@ static int serial_base_device_init(struct uart_port *port, struct device *parent_dev, const struct device_type *type, void (*release)(struct device *dev), - int id) + unsigned int ctrl_id, + unsigned int port_id) { device_initialize(dev); dev->type = type; @@ -61,12 +70,17 @@ static int serial_base_device_init(struct uart_port *port, return -EPROBE_DEFER; } - return dev_set_name(dev, "%s.%s.%d", type->name, dev_name(port->dev), id); -} + if (type == &serial_ctrl_type) + return dev_set_name(dev, "%s.%s.%d", type->name, + dev_name(port->dev), ctrl_id); -static const struct device_type serial_ctrl_type = { - .name = "ctrl", -}; + if (type == &serial_port_type) + return dev_set_name(dev, "%s.%s.%d.%d", type->name, + dev_name(port->dev), ctrl_id, + port_id); + + return -EINVAL; +} static void serial_base_ctrl_release(struct device *dev) { @@ -96,7 +110,7 @@ struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port, err = serial_base_device_init(port, &ctrl_dev->dev, parent, &serial_ctrl_type, serial_base_ctrl_release, - port->ctrl_id); + port->ctrl_id, 0); if (err) goto err_put_device; @@ -112,10 +126,6 @@ struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port, return ERR_PTR(err); } -static const struct device_type serial_port_type = { - .name = "port", -}; - static void serial_base_port_release(struct device *dev) { struct serial_port_device *port_dev = to_serial_base_port_device(dev); @@ -136,7 +146,7 @@ struct serial_port_device *serial_base_port_add(struct uart_port *port, err = serial_base_device_init(port, &port_dev->dev, &ctrl_dev->dev, &serial_port_type, serial_base_port_release, - port->port_id); + port->ctrl_id, port->port_id); if (err) goto err_put_device;