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 casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k7aMl-0004I3-1m for barebox@lists.infradead.org; Mon, 17 Aug 2020 08:19:46 +0000 From: Oleksij Rempel Date: Mon, 17 Aug 2020 10:19:23 +0200 Message-Id: <20200817081929.2329-2-o.rempel@pengutronix.de> In-Reply-To: <20200817081929.2329-1-o.rempel@pengutronix.de> References: <20200817081929.2329-1-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 v4 1/7] of: base: register DT root as device To: barebox@lists.infradead.org, david@protonic.nl 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 machine.of ... With devinfo, you'll be able to get some board specific information, if this is implemented: barebox@Protonic PRTI6Q board:/ devinfo machine.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 | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/of/base.c b/drivers/of/base.c index 2fc87528eb..9e49158e61 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -2136,6 +2136,21 @@ static int of_probe_memory(void) } mem_initcall(of_probe_memory); +static void of_platform_device_create_root(struct device_node *np) +{ + struct device_d *dev; + int ret; + + dev = xzalloc(sizeof(*dev)); + dev->id = DEVICE_ID_SINGLE; + dev->device_node = np; + dev_set_name(dev, "machine.of"); + + ret = platform_device_register(dev); + if (ret) + free(dev); +} + int of_probe(void) { struct device_node *firmware; @@ -2153,6 +2168,8 @@ int of_probe(void) if (firmware) of_platform_populate(firmware, NULL, NULL); + of_platform_device_create_root(root_node); + of_clk_init(root_node, NULL); of_platform_populate(root_node, of_default_bus_match_table, NULL); -- 2.28.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox