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[209.132.180.67]) by mx.google.com with ESMTP id ln6si47761619pab.182.2016.01.12.04.49.13; Tue, 12 Jan 2016 04:49:14 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dkim=pass header.i=@linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965418AbcALMtK (ORCPT + 29 others); Tue, 12 Jan 2016 07:49:10 -0500 Received: from mail-wm0-f49.google.com ([74.125.82.49]:38235 "EHLO mail-wm0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750936AbcALMre (ORCPT ); Tue, 12 Jan 2016 07:47:34 -0500 Received: by mail-wm0-f49.google.com with SMTP id b14so318278494wmb.1 for ; Tue, 12 Jan 2016 04:47:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=baIoO5QhXd/qohfaZ2K5nb/sx2n4fcNKRMxKygunz/8=; b=TYKIfdlvmehc8xFCIDDEUPdWBLjZftw3WqP1oZtlfMT/na8KpBXMSKvRfUGgjucbSw qQDlJ8B4tDoB8LXXD14BfgnBmORymyTV8wqmU+v5fxz7q4QHtLwduhb5IdmgixIsBWTT TKnZVbyPHy0xOwMA6DOzITigBP6oVaSBSWrKE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=baIoO5QhXd/qohfaZ2K5nb/sx2n4fcNKRMxKygunz/8=; b=bADNY7SQg0LCOhU+zX3/698rfHZi4oOFu2K7WtBvpt6P/oI2kY1nD1s2XAmJqvL7tD 7D1G+ulvkY0iU3aqYkPlxBrDKfT9du3E60omWsOO9xYX2NRcAj9clwjPMrRaRSVAtWGc Y/nRzRSzEhN4qgaY02LZb8l1zd9xowhrol6Yxf4qdqvXa4il3Xv8Y5Alv0cZzh4XMjiP OuW5Jd4aaRWMCAzXiNz3WT3S/+tQV4vzDqpnM0xHTWao8C7HeVWKdwfeSfnbse4whq0d k/QiWg5Fd53bOKW2zyFrm0j+dHj7UKh3U0/h7J/YB4AIN3s98MAy5gFyA6SBJtxukwsa aIzg== X-Gm-Message-State: ALoCoQlVq0ZndrX9/t5ysmjkJHYhy5acUeaSlGj+H/z+3xkgFdi0ixE90xbqQ8a+sYoe0fKnVKD64vXVTBmMvVSylxuHpYqZqw== X-Received: by 10.28.105.25 with SMTP id e25mr20842857wmc.62.1452602853776; Tue, 12 Jan 2016 04:47:33 -0800 (PST) Received: from localhost.localdomain ([217.46.108.250]) by smtp.gmail.com with ESMTPSA id uo9sm30240142wjc.49.2016.01.12.04.47.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 12 Jan 2016 04:47:33 -0800 (PST) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: kernel@stlinux.com, maxime.coquelin@st.com, ohad@wizery.com, devicetree@vger.kernel.org, Nathan_Lynch@mentor.com, f.fainelli@gmail.com, ludovic.barre@st.com, s-anna@ti.com, Lee Jones Subject: [PATCH v5 3/7] remoteproc: debugfs: Add ability to boot remote processor using debugfs Date: Tue, 12 Jan 2016 12:46:17 +0000 Message-Id: <1452602781-22424-4-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1452602781-22424-1-git-send-email-lee.jones@linaro.org> References: <1452602781-22424-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This functionality is especially useful during the testing phase. When used in conjunction with Mailbox's Test Framework we can trivially conduct end-to-end testing i.e. boot co-processor, send and receive messages to the co-processor, then shut it down again (repeat as required). Signed-off-by: Ludovic Barre Signed-off-by: Lee Jones --- drivers/remoteproc/remoteproc_debugfs.c | 34 +++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) -- 1.9.1 diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c index f63464c..2f2ac33 100644 --- a/drivers/remoteproc/remoteproc_debugfs.c +++ b/drivers/remoteproc/remoteproc_debugfs.c @@ -88,8 +88,42 @@ static ssize_t rproc_state_read(struct file *filp, char __user *userbuf, return simple_read_from_buffer(userbuf, count, ppos, buf, i); } +static ssize_t rproc_state_write(struct file *filp, const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct rproc *rproc = filp->private_data; + char buf[10]; + int ret; + + if (count > sizeof(buf) || count <= 0) + return -EINVAL; + + ret = copy_from_user(buf, userbuf, count); + if (ret) + return -EFAULT; + + if (buf[count - 1] == '\n') + buf[count - 1] = '\0'; + + if (!strncmp(buf, "start", count)) { + ret = rproc_boot(rproc); + if (ret) { + dev_err(&rproc->dev, "Boot failed: %d\n", ret); + return ret; + } + } else if (!strncmp(buf, "stop", count)) { + rproc_shutdown(rproc); + } else { + dev_err(&rproc->dev, "Unrecognised option: %s\n", buf); + return -EINVAL; + } + + return count; +} + static const struct file_operations rproc_state_ops = { .read = rproc_state_read, + .write = rproc_state_write, .open = simple_open, .llseek = generic_file_llseek, };