From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH 14/15] drm/dsi: Resolve MIPI DSI device from phandle Date: Mon, 13 Oct 2014 12:16:34 +0200 Message-ID: <1413195395-3355-14-git-send-email-thierry.reding@gmail.com> References: <1413195395-3355-1-git-send-email-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wg0-f41.google.com (mail-wg0-f41.google.com [74.125.82.41]) by gabe.freedesktop.org (Postfix) with ESMTP id 9354389F5F for ; Mon, 13 Oct 2014 03:17:00 -0700 (PDT) Received: by mail-wg0-f41.google.com with SMTP id b13so8391057wgh.24 for ; Mon, 13 Oct 2014 03:16:59 -0700 (PDT) In-Reply-To: <1413195395-3355-1-git-send-email-thierry.reding@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org Cc: Andrzej Hajda List-Id: dri-devel@lists.freedesktop.org From: Thierry Reding Add a function, of_find_mipi_dsi_device_by_node(), that can be used to resolve a phandle to a MIPI DSI device. Signed-off-by: Thierry Reding --- drivers/gpu/drm/drm_mipi_dsi.c | 23 +++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 1 + 2 files changed, 24 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index a0b9c7ea77a7..0067f914c1ea 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -67,6 +67,29 @@ static struct bus_type mipi_dsi_bus_type = { .pm = &mipi_dsi_device_pm_ops, }; +static int of_device_match(struct device *dev, void *data) +{ + return dev->of_node == data; +} + +/** + * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a + * device tree node + * @np: device tree node + * + * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no + * such device exists (or has not been registered yet). + */ +struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np) +{ + struct device *dev; + + dev = bus_find_device(&mipi_dsi_bus_type, NULL, np, of_device_match); + + return dev ? to_mipi_dsi_device(dev) : NULL; +} +EXPORT_SYMBOL(of_find_mipi_dsi_device_by_node); + static void mipi_dsi_dev_release(struct device *dev) { struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 17ef2fbb09a5..8f025cc5ce99 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -142,6 +142,7 @@ static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev) return container_of(dev, struct mipi_dsi_device, dev); } +struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np); int mipi_dsi_attach(struct mipi_dsi_device *dsi); int mipi_dsi_detach(struct mipi_dsi_device *dsi); int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, -- 2.1.2