Hi Krzysztof,

On 16:20 Wed 21 Aug     , Krzysztof Kozlowski wrote:

quoted

On 21/08/2024 10:38, Krzysztof Kozlowski wrote:

quoted

On Tue, Aug 20, 2024 at 04:36:10PM +0200, Andrea della Porta wrote:

...

quoted

quoted

 drivers/misc/Kconfig                  |   1 +
 drivers/misc/Makefile                 |   1 +
 drivers/misc/rp1/Kconfig              |  20 ++
 drivers/misc/rp1/Makefile             |   3 +
 drivers/misc/rp1/rp1-pci.c            | 333 ++++++++++++++++++++++++++
 drivers/misc/rp1/rp1-pci.dtso         |   8 +
 drivers/pci/quirks.c                  |   1 +
 include/linux/pci_ids.h               |   3 +
 10 files changed, 524 insertions(+)
 create mode 100644 arch/arm64/boot/dts/broadcom/rp1.dtso
 create mode 100644 drivers/misc/rp1/Kconfig
 create mode 100644 drivers/misc/rp1/Makefile
 create mode 100644 drivers/misc/rp1/rp1-pci.c
 create mode 100644 drivers/misc/rp1/rp1-pci.dtso

diff --git a/MAINTAINERS b/MAINTAINERS
index 67f460c36ea1..1359538b76e8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS

@@ -19119,9 +19119,11 @@ F:	include/uapi/linux/media/raspberrypi/
 RASPBERRY PI RP1 PCI DRIVER
 M:	Andrea della Porta <andrea.porta@suse.com>
 S:	Maintained
+F:	arch/arm64/boot/dts/broadcom/rp1.dtso
 F:	Documentation/devicetree/bindings/clock/raspberrypi,rp1-clocks.yaml
 F:	Documentation/devicetree/bindings/pinctrl/raspberrypi,rp1-gpio.yaml
 F:	drivers/clk/clk-rp1.c
+F:	drivers/misc/rp1/
 F:	drivers/pinctrl/pinctrl-rp1.c
 F:	include/dt-bindings/clock/rp1.h
 F:	include/dt-bindings/misc/rp1.h

diff --git a/arch/arm64/boot/dts/broadcom/rp1.dtso b/arch/arm64/boot/dts/broadcom/rp1.dtso
new file mode 100644
index 000000000000..d80178a278ee
--- /dev/null
+++ b/arch/arm64/boot/dts/broadcom/rp1.dtso

@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/clock/rp1.h>
+#include <dt-bindings/misc/rp1.h>
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	fragment@0 {
+		target-path="";
+		__overlay__ {
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			rp1: rp1@0 {
+				compatible = "simple-bus";
+				#address-cells = <2>;
+				#size-cells = <2>;
+				interrupt-controller;
+				interrupt-parent = <&rp1>;
+				#interrupt-cells = <2>;
+
+				// ranges and dma-ranges must be provided by the includer
+				ranges = <0xc0 0x40000000
+					  0x01/*0x02000000*/ 0x00 0x00000000
+					  0x00 0x00400000>;

Are you 100% sure you do not have here dtc W=1 warnings?

One more thing, I do not see this overlay applied to any target, which
means it cannot be tested. You miss entry in Makefile.

The dtso is intended to be built from driver/misc/rp1/Makefile as it will
be included in the driver obj:

--- /dev/null
+++ b/drivers/misc/rp1/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+rp1-pci-objs                   := rp1-pci.o rp1-pci.dtbo.o
+obj-$(CONFIG_MISC_RP1)         += rp1-pci.o

and not as part of the dtb system, hence it's m issing in
arch/arm64/boot/dts/broadcom/Makefile.

On the other hand:

#> make W=1 CHECK_DTBS=y broadcom/rp1.dtbo
  DTC     arch/arm64/boot/dts/broadcom/rp1.dtbo
arch/arm64/boot/dts/broadcom/rp1.dtso:37.24-42.7: Warning (simple_bus_reg): /fragment@0/__overlay__/rp1@0/clk_xosc: missing or empty reg/ranges property
arch/arm64/boot/dts/broadcom/rp1.dtso:44.26-49.7: Warning (simple_bus_reg): /fragment@0/__overlay__/rp1@0/macb_pclk: missing or empty reg/ranges property
arch/arm64/boot/dts/broadcom/rp1.dtso:51.26-56.7: Warning (simple_bus_reg): /fragment@0/__overlay__/rp1@0/macb_hclk: missing or empty reg/ranges property
arch/arm64/boot/dts/broadcom/rp1.dtso:14.15-173.5: Warning (avoid_unnecessary_addr_size): /fragment@0/__overlay__: unnecessary #address-cells/#size-cells without "ranges", "dma-ranges" or child "reg" property

seems to do the checks, unless I'm missing something.