From patchwork Thu Nov 19 15:22:05 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Auger Eric X-Patchwork-Id: 57022 Delivered-To: patches@linaro.org Received: by 10.112.155.196 with SMTP id vy4csp3244791lbb; Thu, 19 Nov 2015 07:22:25 -0800 (PST) X-Received: by 10.194.75.133 with SMTP id c5mr9187798wjw.115.1447946538690; Thu, 19 Nov 2015 07:22:18 -0800 (PST) Return-Path: Received: from mail-wm0-x22c.google.com (mail-wm0-x22c.google.com. [2a00:1450:400c:c09::22c]) by mx.google.com with ESMTPS id m135si48714084wmb.68.2015.11.19.07.22.18 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 19 Nov 2015 07:22:18 -0800 (PST) Received-SPF: pass (google.com: domain of eric.auger@linaro.org designates 2a00:1450:400c:c09::22c as permitted sender) client-ip=2a00:1450:400c:c09::22c; Authentication-Results: mx.google.com; spf=pass (google.com: domain of eric.auger@linaro.org designates 2a00:1450:400c:c09::22c as permitted sender) smtp.mailfrom=eric.auger@linaro.org; dkim=pass header.i=@linaro-org.20150623.gappssmtp.com Received: by wmec201 with SMTP id c201so30924997wme.0 for ; Thu, 19 Nov 2015 07:22:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=I/BTzYHGR12Qh9gW+a//OfNbTkFmg/9U8k6a9BDEigc=; b=tDJ60FNvpyBRZybJSDMdQ3EEmyhafSaqWCT0wrV+Su1jZf4abVDWnu6KAPMkVmY3n2 IIc13pxmmwzx4oW74h1728smwBkxjlnCUso/nSmfWg9rPGDWqMAU0nUwwzN51TVuaj+Q MZSetyju9uiTG1gHG/ScoopDPgrKL+Rqo8SpSNE/xcfIZ6IrPn5L+B3naqD6jzftLCO0 MPEO7d4iwflkLXVYoMFXQqGG9BStE3sDTg7+VM9iqqer6GpZLFQnYsW5qfxyPf4xgLP0 syRj5trFmVKshWjkU2X+XhucQEiqZUBSoRv712k5QSAVLY/1ch813CjjyARIywlTTVwp tncQ== 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=I/BTzYHGR12Qh9gW+a//OfNbTkFmg/9U8k6a9BDEigc=; b=KApnTmAyhUNLzsTNQvydhsShEDJhGkfiBbzS4/2X8FzDgsPsXo/zC03qnZSVg3rqN5 7N6I7NnMSnABUtXHq0VlYMd58RFfZ4QnnvqpXjM5VJr0wkfnsoMuuq+Tce311SnH1cAi fndv35E5rZ+4sYjncnx9ZK/qQlDfzvzDMvBt8CMc3s0NYaNMBtZ/u9pQug7UcOBvHFTx 5N65DlzF8vENyfPnggq3Cda8y+szuJRWH6+RJjRonsB9DF0o/o2W1LgxcWH8VNzLV5hN UDXn2v8VKdZETkGMu19raQodx0inmownZLaN22Ee0sBjPcrwF+y9HzfYOJROyl7UUSBX BDWA== X-Gm-Message-State: ALoCoQn8eZTsvw3KHbt90xIsp3T7spxiw8fnA6FZ6uLT1LRW8rZooAPkOOHDwn8XIimICvgKZlwv X-Received: by 10.194.178.70 with SMTP id cw6mr8906562wjc.73.1447946538506; Thu, 19 Nov 2015 07:22:18 -0800 (PST) Return-Path: Received: from midway01-04-00.lavalab ([81.128.185.50]) by smtp.gmail.com with ESMTPSA id vr10sm8367221wjc.38.2015.11.19.07.22.17 (version=TLS1_1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 19 Nov 2015 07:22:17 -0800 (PST) From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org, alex.williamson@redhat.com, peter.maydell@linaro.org Cc: patches@linaro.org, christoffer.dall@linaro.org, pbonzini@redhat.com, b.reynal@virtualopensystems.com, suravee.suthikulpanit@amd.com, thomas.lendacky@amd.com Subject: [RESEND RFC 3/6] device_tree: introduce qemu_fdt_node_path Date: Thu, 19 Nov 2015 15:22:05 +0000 Message-Id: <1447946528-1533-4-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1447946528-1533-1-git-send-email-eric.auger@linaro.org> References: <1447946528-1533-1-git-send-email-eric.auger@linaro.org> This new helper routine returns the node path of a device referred to by its name and compat string. Signed-off-by: Eric Auger --- device_tree.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/sysemu/device_tree.h | 3 +++ 2 files changed, 43 insertions(+) -- 1.8.3.2 diff --git a/device_tree.c b/device_tree.c index 58a5329..f184e3c 100644 --- a/device_tree.c +++ b/device_tree.c @@ -171,6 +171,46 @@ static int findnode_nofail(void *fdt, const char *node_path) return offset; } +/** + * qemu_fdt_node_path + * + * return the node path of a device, referred to by its node name + * and its compat string + * fdt: pointer to the dt blob + * name: name of the device + * compat: compatibility string of the device + * + * returns the node path + */ +int qemu_fdt_node_path(void *fdt, const char *name, char *compat, + char **node_path) +{ + int offset = 0, len; + const char *iter_name; + char path[256]; + int ret; + + *node_path = NULL; + while (1) { + offset = fdt_node_offset_by_compatible(fdt, offset, compat); + if (offset == -FDT_ERR_NOTFOUND) { + break; + } + iter_name = fdt_get_name(fdt, offset, &len); + if (!strncmp(iter_name, name, len)) { + goto found; + } + } + return offset; + +found: + ret = fdt_get_path(fdt, offset, path, 256); + if (!ret) { + *node_path = g_strdup(path); + } + return ret; +} + int qemu_fdt_setprop(void *fdt, const char *node_path, const char *property, const void *val, int size) { diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h index 307e53d..f9e6e6e 100644 --- a/include/sysemu/device_tree.h +++ b/include/sysemu/device_tree.h @@ -18,6 +18,9 @@ void *create_device_tree(int *sizep); void *load_device_tree(const char *filename_path, int *sizep); void *load_device_tree_from_sysfs(void); +int qemu_fdt_node_path(void *fdt, const char *name, char *compat, + char **node_path); + int qemu_fdt_setprop(void *fdt, const char *node_path, const char *property, const void *val, int size); int qemu_fdt_setprop_cell(void *fdt, const char *node_path,