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From: Oleksij Rempel <o.rempel@pengutronix.de>
To: barebox@lists.infradead.org, david@protonic.nl
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Subject: [PATCH v5 01/12] of: base: register DT root as device
Date: Thu, 20 Aug 2020 09:34:43 +0200	[thread overview]
Message-ID: <20200820073454.17500-2-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20200820073454.17500-1-o.rempel@pengutronix.de>

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
...

With devinfo, you'll be able to get some board specific information,
if this is implemented:
barebox@Protonic PRTI6Q board:/ devinfo machine
Driver: board-protonic-imx6
Bus: platform
Parameters:
  boardid: 0 (type: uint32)
  boardrev: 1 (type: uint32)

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/of/base.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 2fc87528eb..222d72947e 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");
+
+	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


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  reply	other threads:[~2020-08-20  7:34 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-20  7:34 [PATCH v5 00/12] prepare Protonic board code for mainline Oleksij Rempel
2020-08-20  7:34 ` Oleksij Rempel [this message]
2020-08-20  7:34 ` [PATCH v5 02/12] gpiolib: add gpio_array_to_id helper to get ID out of GPIO array Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 03/12] common: console_common: add of_console_get_by_alias() helper Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 04/12] of: of_device_get_match_compatible() helper Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 05/12] ARM: protonic-imx6: port Protonic specific board code Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 06/12] ARM: dts: unify barebox and barebox, env partitions for all Protonic boards Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 07/12] ARM: dts: imx6q-prti6q: add pstore/ramoops node Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 08/12] ARM: dts: protonic: lanmcu: add eMMC partition table Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 09/12] ARM: dts: protonic: add fixed clock for the FEC node Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 10/12] ARM: dts: protonic: lanmcu: use UART_CTS instead of GPIO based CTS Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 11/12] ARM: dts: protonic: properly define PHY nodes on lanmcu and plym2m boards Oleksij Rempel
2020-08-20  7:34 ` [PATCH v5 12/12] ARM: dts: protonic: lanmcu: add uart-has-rtscts to enable rs485 functionality Oleksij Rempel
2020-08-24  6:51 ` [PATCH v5 00/12] prepare Protonic board code for mainline Sascha Hauer

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