From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k5mY6-0007VR-RW for barebox@lists.infradead.org; Wed, 12 Aug 2020 08:55:55 +0000 From: Oleksij Rempel Date: Wed, 12 Aug 2020 10:55:52 +0200 Message-Id: <20200812085552.12688-1-o.rempel@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH fixup v1] of: base: register DT root as device To: barebox@lists.infradead.org Cc: Oleksij Rempel A usual board file contains at least one of_machine_is_compatible(). Some of the have a rather long list with complicated version logic. To avoid own implementation for driver management, register the root node of device tree as platform device. So, the main platform bus can attach proper board driver. After this patch a typical board.c file can reuse existing driver infrastructure. After this patch, you will be able to see all registered board drivers with drvinfo as fallow: ... board-embest-riot board-protonic-imx6 dt-root.of ... With devinfo, you'll be able to get some board specific information, if this is implemented: barebox@Protonic PRTI6Q board:/ devinfo dt-root.of Driver: board-protonic-imx6 Bus: platform Parameters: boardid: 0 (type: uint32) boardrev: 1 (type: uint32) Signed-off-by: Oleksij Rempel --- drivers/of/base.c | 2 ++ drivers/of/platform.c | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/drivers/of/base.c b/drivers/of/base.c index 4c633bcd49..6f6cdc9379 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -2149,6 +2149,8 @@ int of_probe(void) if (firmware) of_platform_populate(firmware, NULL, NULL); + of_platform_device_create(root_node, NULL); + of_clk_init(root_node, NULL); of_platform_populate(root_node, of_default_bus_match_table, NULL); diff --git a/drivers/of/platform.c b/drivers/of/platform.c index ca84cede23..767beebe06 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -50,6 +50,11 @@ static void of_device_make_bus_id(struct device_d *dev) const __be32 *reg; u64 addr; + if (!node->parent) { + dev_set_name(dev, "dt-root.of"); + return; + } + /* Construct the name, using parent nodes if necessary to ensure uniqueness */ while (node->parent) { /* -- 2.28.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox