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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DCC6C433EF for ; Mon, 13 Jun 2022 07:52:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238408AbiFMHwm (ORCPT ); Mon, 13 Jun 2022 03:52:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238405AbiFMHwl (ORCPT ); Mon, 13 Jun 2022 03:52:41 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4ED2463F1; Mon, 13 Jun 2022 00:52:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1655106760; x=1686642760; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=xG7X1zCucWzDq/bMcldSa1WJJgbrNnFq0gY3Vr6pwnE=; b=dtT2eT0E2iZ4KkuZpMNgnuFtzGMllw96DGX+VdILa1TNDHwu+pz9S+HC b+z0dn+k26YVdJ/mM3p5sQekKAM5fdHvT0RVWPFRA2KeB94i++KtTGQu7 m53C6BMvnVH2ucTJI43n4rDoOchKp8Sh8zswWlu6hgOBxeV4nxdWJrDjL lfdPItF3bU9Ea1i/UpIzWWjGnLS9aJmVuTB7AZXBrJrZcZ6Z0KYB3A0y0 VsrceuJChxW0pV+tAZJZiacm6TTefnNRvbBOqWay+ucwPmmeV97BFd/vp L4OE1DyyZNvERTJa17O4t+GjsTDy3nM951khztw+4QdM2Cw9N3Hgd4eIz A==; X-IronPort-AV: E=McAfee;i="6400,9594,10376"; a="278238009" X-IronPort-AV: E=Sophos;i="5.91,296,1647327600"; d="scan'208";a="278238009" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jun 2022 00:52:40 -0700 X-IronPort-AV: E=Sophos;i="5.91,296,1647327600"; d="scan'208";a="639593089" Received: from fnechitx-mobl.ger.corp.intel.com (HELO ijarvine-MOBL2.ger.corp.intel.com) ([10.249.40.115]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jun 2022 00:52:35 -0700 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= To: linux-serial@vger.kernel.org, Greg KH , Jiri Slaby Cc: Andy Shevchenko , Lukas Wunner , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , linux-kernel@vger.kernel.org, =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Arnd Bergmann , linux-api@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH v6 0/6] Add RS485 9th bit addressing mode support to DW UART Date: Mon, 13 Jun 2022 10:52:21 +0300 Message-Id: <20220613075227.10394-1-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org This patchset adds RS-485 9th bit addressing mode support to the DW UART driver and the necessary serial core bits to handle it. The addressing mode is configured through .rs485_config() as was requested during the review of the earlier versions. The line configuration related ADDRB is still kept in ktermios->c_cflag to be able to take account the extra addressing bit while calculating timing, etc. but it is set/cleared by .rs485_config(). PLEASE CHECK that the serial_rs485 .padding change looks OK (mainly that it won't add hole under some odd condition which would alter serial_rs485's sizeof)! Cc: Arnd Bergmann Cc: linux-api@vger.kernel.org Cc: linux-arch@vger.kernel.org v5 -> v6: - Reorder remaining patches - LSR changes are simpler due to helper added by LSR fix series - Depend on rs485_struct sanitization on catching much of invalid config - In order to be able to alter ADDRB in termios .c_cflag within .rs485_config(), take termios_rwsem and pass ktermios to it. - Moved addressing mode setup entirely into .rs485_config() - Use ndelay() instead of udelay() (uart_port->frame_time is in nsecs) Ilpo Järvinen (6): serial: 8250: make saved LSR larger serial: 8250: create lsr_save_mask serial: 8250_lpss: Use 32-bit reads serial: take termios_rwsem for .rs485_config() & pass termios as param serial: Support for RS-485 multipoint addresses serial: 8250_dwlib: Support for 9th bit multipoint addressing Documentation/driver-api/serial/driver.rst | 2 + .../driver-api/serial/serial-rs485.rst | 26 ++++- drivers/tty/serial/8250/8250.h | 5 +- drivers/tty/serial/8250/8250_core.c | 4 + drivers/tty/serial/8250/8250_dw.c | 2 +- drivers/tty/serial/8250/8250_dwlib.c | 105 +++++++++++++++++- drivers/tty/serial/8250/8250_exar.c | 11 +- drivers/tty/serial/8250/8250_fintek.c | 2 +- drivers/tty/serial/8250/8250_fsl.c | 2 +- drivers/tty/serial/8250/8250_ingenic.c | 2 +- drivers/tty/serial/8250/8250_lpc18xx.c | 2 +- drivers/tty/serial/8250/8250_lpss.c | 2 +- drivers/tty/serial/8250/8250_omap.c | 8 +- drivers/tty/serial/8250/8250_pci.c | 2 +- drivers/tty/serial/8250/8250_port.c | 18 +-- drivers/tty/serial/amba-pl011.c | 2 +- drivers/tty/serial/ar933x_uart.c | 2 +- drivers/tty/serial/atmel_serial.c | 2 +- drivers/tty/serial/fsl_lpuart.c | 4 +- drivers/tty/serial/imx.c | 2 +- drivers/tty/serial/max310x.c | 2 +- drivers/tty/serial/mcf.c | 3 +- drivers/tty/serial/omap-serial.c | 3 +- drivers/tty/serial/sc16is7xx.c | 2 +- drivers/tty/serial/serial_core.c | 26 ++++- drivers/tty/serial/stm32-usart.c | 2 +- drivers/tty/tty_ioctl.c | 4 + include/linux/serial_8250.h | 7 +- include/linux/serial_core.h | 3 +- include/uapi/asm-generic/termbits-common.h | 1 + include/uapi/linux/serial.h | 12 +- 31 files changed, 220 insertions(+), 50 deletions(-) -- 2.30.2