From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934399AbeE2NPG (ORCPT ); Tue, 29 May 2018 09:15:06 -0400 Received: from mail-wm0-f68.google.com ([74.125.82.68]:53433 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934521AbeE2NKq (ORCPT ); Tue, 29 May 2018 09:10:46 -0400 X-Google-Smtp-Source: AB8JxZrJvEyP0buAEw7JdC6dj/zYS6OOhMpeFe7ZHHmLvfOsZ6T+wVGYHpih8Liy0VthJJ8PW0ZcTg== From: Ricardo Ribalda Delgado To: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Cc: Ricardo Ribalda Delgado , Rob Herring , Johan Hovold , Greg Kroah-Hartman , Jiri Slaby Subject: [PATCH 08/19] serdev: Provide modalias attribute for modalias devices Date: Tue, 29 May 2018 15:10:03 +0200 Message-Id: <20180529131014.18641-9-ricardo.ribalda@gmail.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180529131014.18641-1-ricardo.ribalda@gmail.com> References: <20180529131014.18641-1-ricardo.ribalda@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Create modalias sysfs attribute for modalias devices. This is required by modprobe/udev to autoload the serdev driver. Eg: root@qt5022:~# cat /sys/bus/serial/devices/serial1-0/modalias serdev:ttydev Cc: Rob Herring Cc: Johan Hovold Cc: Greg Kroah-Hartman Cc: Jiri Slaby Signed-off-by: Ricardo Ribalda Delgado --- drivers/tty/serdev/core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index e695fa649a6d..a9c935f68076 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -23,12 +23,17 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { int len; + struct serdev_device *serdev = to_serdev_device(dev); len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1); if (len != -ENODEV) return len; - return of_device_modalias(dev, buf, PAGE_SIZE); + len = of_device_modalias(dev, buf, PAGE_SIZE); + if (len != -ENODEV) + return len; + + return sprintf(buf, "%s%s\n", SERDEV_MODULE_PREFIX, serdev->modalias); } static DEVICE_ATTR_RO(modalias); -- 2.17.0