From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 19/19] of: Add dummy driver
Date: Fri, 25 Jun 2021 09:25:40 +0200 [thread overview]
Message-ID: <20210625072540.32717-20-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20210625072540.32717-1-s.hauer@pengutronix.de>
With deep probe support we decide that a device for a new device node is
available when the device has a driver. It sometimes happens that a
consumer of a device node doesn't point to the node to which the driver
is attached to, but instead a subnode, like this:
usb2phy0: usb2-phy@fe8a0000 {
compatible = "rockchip,rk3568-usb2phy";
u2phy0_host: host-port {
status = "disabled";
};
};
usbhost_dwc3: dwc3@fd000000 {
compatible = "snps,dwc3";
phys = <&u2phy0_host>;
phy-names = "usb2-phy";
};
of_device_ensure_probed() would now expect a driver for the &u2phy0_host
node, but the driver is attached to the &usb2phy0 node. This patch adds
of_platform_device_dummy_drv() which can be used in such situations. When
called on the &u2phy0_host it will attach a dummy driver to it so that
deep probe is happy.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/of/platform.c | 9 +++++++++
include/of.h | 5 +++++
2 files changed, 14 insertions(+)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index bc0477be1d..e3e8227b8c 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -169,6 +169,15 @@ struct device_d *of_platform_device_create(struct device_node *np,
return NULL;
}
+struct driver_d dummy_driver = {
+ .name = "dummy-driver",
+};
+
+void of_platform_device_dummy_drv(struct device_d *dev)
+{
+ dev->driver = &dummy_driver;
+}
+
/**
* of_device_enable_and_register - Enable and register device
* @np: pointer to node to enable create device for
diff --git a/include/of.h b/include/of.h
index 98de9d8480..6f1ec94e7e 100644
--- a/include/of.h
+++ b/include/of.h
@@ -268,6 +268,7 @@ extern int barebox_register_fdt(const void *dtb);
extern struct device_d *of_platform_device_create(struct device_node *np,
struct device_d *parent);
+extern void of_platform_device_dummy_drv(struct device_d *dev);
extern int of_platform_populate(struct device_node *root,
const struct of_device_id *matches,
struct device_d *parent);
@@ -365,6 +366,10 @@ static inline struct device_d *of_platform_device_create(struct device_node *np,
return NULL;
}
+static inline void of_platform_device_dummy_drv(struct device_d *dev)
+{
+}
+
static inline int of_device_ensure_probed(struct device_node *np)
{
return 0;
--
2.29.2
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prev parent reply other threads:[~2021-06-25 7:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-25 7:25 [PATCH v6 00/19] barebox deep probe support Sascha Hauer
2021-06-25 7:25 ` [PATCH 01/19] imx53: remove unused imx53_add_nand Sascha Hauer
2021-06-25 7:25 ` [PATCH 02/19] of: platform: remove check of already added devices Sascha Hauer
2021-06-25 7:25 ` [PATCH 03/19] of: platform: Keep track of populated platform devices Sascha Hauer
2021-06-25 7:25 ` [PATCH 04/19] of: base: move memory init from DT to initcall Sascha Hauer
2021-06-25 7:25 ` [PATCH 05/19] of: base: move clock init from of_probe() to barebox_register_of() Sascha Hauer
2021-06-25 7:25 ` [PATCH 06/19] of: Set of_chosen and of_model earlier Sascha Hauer
2021-06-25 7:25 ` [PATCH 07/19] of: implement of_get_stdoutpath() Sascha Hauer
2021-06-25 7:25 ` [PATCH 08/19] initcall: add of_populate_initcall Sascha Hauer
2021-06-25 7:25 ` [PATCH 09/19] common: add initial barebox deep-probe support Sascha Hauer
2021-06-25 7:25 ` [PATCH 10/19] pinctrl: Find controller node first Sascha Hauer
2021-06-25 7:25 ` [PATCH 11/19] common: Explicitly probe consoles earlier with deep probe Sascha Hauer
2021-06-25 7:25 ` [PATCH 12/19] pinctrl: Add deep probe support Sascha Hauer
2021-06-25 7:25 ` [PATCH 13/19] phy: " Sascha Hauer
2021-06-25 7:25 ` [PATCH 14/19] ARM: i.MX: esdctl: add deep-probe support Sascha Hauer
2021-06-25 7:25 ` [PATCH 15/19] ARM: stm32mp: ddrctrl: " Sascha Hauer
2021-06-25 7:25 ` [PATCH 16/19] ARM: boards: mx6-sabrelite: " Sascha Hauer
2021-06-25 7:25 ` [PATCH 17/19] ARM: i.MX Phytec physom: convert to board driver Sascha Hauer
2021-06-25 7:25 ` [PATCH 18/19] ARM: i.MX Phytec physom: Add deep-probe support Sascha Hauer
2021-06-25 7:25 ` Sascha Hauer [this message]
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