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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C52AFC43215 for ; Mon, 25 Nov 2019 12:33:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A84362082F for ; Mon, 25 Nov 2019 12:33:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727401AbfKYMdo (ORCPT ); Mon, 25 Nov 2019 07:33:44 -0500 Received: from mail-sz.amlogic.com ([211.162.65.117]:24866 "EHLO mail-sz.amlogic.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725823AbfKYMdo (ORCPT ); Mon, 25 Nov 2019 07:33:44 -0500 Received: from droid12-sz.software.amlogic (10.28.8.22) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.1591.10; Mon, 25 Nov 2019 20:34:07 +0800 From: Xingyu Chen To: Wim Van Sebroeck , Guenter Roeck , Kevin Hilman , Neil Armstrong , Rob Herring CC: Xingyu Chen , Jerome Brunet , Qianggui Song , Jianxin Pan , Jian Hu , , , , Subject: [PATCH v4 0/2] add meson secure watchdog driver Date: Mon, 25 Nov 2019 20:33:36 +0800 Message-ID: <1574685218-31164-1-git-send-email-xingyu.chen@amlogic.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.28.8.22] Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The watchdog controller on the Meson-A/C series SoCs is moved to secure world, We have to call SMC instruction to trap the ATF for watchdog operation. These operations are different from previous SoCs, so we introduce a new watchdog driver to support this kind of SoCs. Chnages since v3 at [2]: - add SM_A1_ prefix for WATCHDOG_OPS - remove phandle to secure-monitor node - remove watchdog node from dts, and register wdt device by platform_device_register_simple() - remove dt-binding for meson secure watchdog - use the msec as unit of timeout parameter which is passed to fw side Changes since v2 at [1]: - remove useless dependency in Kconfig - return zero when getting left time value fails Changes since v1 at [0]: - add a new dependency in Kconfig - simplify/add the return operation - remove useless ping operation when setting the timeout - fix some return values - fix the license statement [0]:https://lore.kernel.org/linux-amlogic/1570874721-36077-1-git-send-email-xingyu.chen@amlogic.com [1]:https://lore.kernel.org/linux-amlogic/1571387622-35132-1-git-send-email-xingyu.chen@amlogic.com [2]:https://lore.kernel.org/linux-amlogic/1571983984-11771-1-git-send-email-xingyu.chen@amlogic.com Xingyu Chen (2): firmware: meson_sm: add new SMC ID support for accessing secure watchdog watchdog: add meson secure watchdog driver drivers/firmware/meson/meson_sm.c | 1 + drivers/watchdog/Kconfig | 16 +++ drivers/watchdog/Makefile | 1 + drivers/watchdog/meson_sec_wdt.c | 207 ++++++++++++++++++++++++++++++++ include/linux/firmware/meson/meson_sm.h | 1 + 5 files changed, 226 insertions(+) create mode 100644 drivers/watchdog/meson_sec_wdt.c -- 2.7.4