Merge tag 'riscv-dt-fixes-for-v6.8-final' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into soc/dt

RISC-V Devicetree fixes for v6.8-final

Starfive:
The previous cleanup broke boot on the jh7100 as the driver depended on
the fallback clock name created based on the node-name when
clock-output-names is not present. Add clock-output-names to restore
working order.

Generic:
BUILTIN_DTB has been broken for ages on any platform other than the
nommu Canaan k210 SoC as the first dtb built (in alphanumerical order),
would get built into the image. This didn't get fixed for ages because
nobody actually cared about running it other than the k210 enough to
fix it. The folks doing Sophgo SG2042 development have come along and
fixed it, as they want to use builtin dtbs. linux-boot on that platform
reuses the dtb it was provided by OpenSBI when booting linux proper,
which is unfortunately not possible to boot a mainline kernel with.

Signed-off-by: Conor Dooley <[email protected]>

* tag 'riscv-dt-fixes-for-v6.8-final' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux:
  riscv: dts: Move BUILTIN_DTB_SOURCE to common Kconfig
  riscv: dts: starfive: jh7100: fix root clock names

Link: https://lore.kernel.org/r/20240306-waltz-facial-9e4e1b792053@spud
Signed-off-by: Arnd Bergmann <[email protected]>

Author: arndb

arch/riscv/Kconfig

@@ -983,7 +983,19 @@ config RISCV_ISA_FALLBACK
 config BUILTIN_DTB
 	bool "Built-in device tree"
 	depends on OF && NONPORTABLE
-	default y if XIP_KERNEL
+	help
+	  Build a device tree into the Linux image.
+	  This option should be selected if no bootloader is being used.
+	  If unsure, say N.
+
+
+config BUILTIN_DTB_SOURCE
+	string "Built-in device tree source"
+	depends on BUILTIN_DTB
+	help
+	  DTS file path (without suffix, relative to arch/riscv/boot/dts)
+	  for the DTS file that will be used to produce the DTB linked into the
+	  kernel.
 
 endmenu # "Boot options"
 

arch/riscv/Kconfig.socs

@@ -84,36 +84,4 @@ config SOC_CANAAN
 	help
 	  This enables support for Canaan Kendryte K210 SoC platform hardware.
 
-if ARCH_CANAAN
-
-config ARCH_CANAAN_K210_DTB_BUILTIN
-	def_bool SOC_CANAAN_K210_DTB_BUILTIN
-
-config SOC_CANAAN_K210_DTB_BUILTIN
-	bool "Builtin device tree for the Canaan Kendryte K210"
-	depends on ARCH_CANAAN
-	default y
-	select OF
-	select BUILTIN_DTB
-	help
-	  Build a device tree for the Kendryte K210 into the Linux image.
-	  This option should be selected if no bootloader is being used.
-	  If unsure, say Y.
-
-config ARCH_CANAAN_K210_DTB_SOURCE
-	string
-	default SOC_CANAAN_K210_DTB_SOURCE
-
-config SOC_CANAAN_K210_DTB_SOURCE
-	string "Source file for the Canaan Kendryte K210 builtin DTB"
-	depends on ARCH_CANAAN
-	depends on ARCH_CANAAN_K210_DTB_BUILTIN
-	default "k210_generic"
-	help
-	  Base name (without suffix, relative to arch/riscv/boot/dts/canaan)
-	  for the DTS file that will be used to produce the DTB linked into the
-	  kernel.
-
-endif # ARCH_CANAAN
-
 endmenu # "SoC selection"

arch/riscv/boot/dts/Makefile

@@ -8,4 +8,4 @@ subdir-y += sophgo
 subdir-y += starfive
 subdir-y += thead
 
-obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y))
+obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix .dtb.o, $(CONFIG_BUILTIN_DTB_SOURCE))

arch/riscv/boot/dts/canaan/Makefile

@@ -5,5 +5,3 @@ dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_bit.dtb
 dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_dock.dtb
 dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_go.dtb
 dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maixduino.dtb
-
-obj-$(CONFIG_ARCH_CANAAN_K210_DTB_BUILTIN) += $(addsuffix .dtb.o, $(CONFIG_ARCH_CANAAN_K210_DTB_SOURCE))

arch/riscv/boot/dts/microchip/Makefile

@@ -4,4 +4,3 @@ dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-m100pfsevp.dtb
 dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-polarberry.dtb
 dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-sev-kit.dtb
 dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-tysom-m.dtb
-obj-$(CONFIG_BUILTIN_DTB) += $(addsuffix .o, $(dtb-y))

arch/riscv/boot/dts/sifive/Makefile

@@ -1,4 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_SIFIVE) += hifive-unleashed-a00.dtb \
 			     hifive-unmatched-a00.dtb
-obj-$(CONFIG_BUILTIN_DTB) += $(addsuffix .o, $(dtb-y))

arch/riscv/boot/dts/starfive/jh7100.dtsi

@@ -116,27 +116,31 @@
 	osc_sys: osc-sys {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
+		clock-output-names = "osc_sys";
 		/* This value must be overridden by the board */
 		clock-frequency = <0>;
 	};
 
 	osc_aud: osc-aud {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
+		clock-output-names = "osc_aud";
 		/* This value must be overridden by the board */
 		clock-frequency = <0>;
 	};
 
 	gmac_rmii_ref: gmac-rmii-ref {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
+		clock-output-names = "gmac_rmii_ref";
 		/* Should be overridden by the board when needed */
 		clock-frequency = <0>;
 	};
 
 	gmac_gr_mii_rxclk: gmac-gr-mii-rxclk {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
+		clock-output-names = "gmac_gr_mii_rxclk";
 		/* Should be overridden by the board when needed */
 		clock-frequency = <0>;
 	};

arch/riscv/configs/nommu_k210_defconfig

@@ -33,6 +33,8 @@ CONFIG_SMP=y
 CONFIG_NR_CPUS=2
 CONFIG_CMDLINE="earlycon console=ttySIF0"
 CONFIG_CMDLINE_FORCE=y
+CONFIG_BUILTIN_DTB=y
+CONFIG_BUILTIN_DTB_SOURCE="canaan/k210_generic"
 # CONFIG_SECCOMP is not set
 # CONFIG_STACKPROTECTOR is not set
 # CONFIG_GCC_PLUGINS is not set

arch/riscv/configs/nommu_k210_sdcard_defconfig

@@ -25,6 +25,8 @@ CONFIG_SMP=y
 CONFIG_NR_CPUS=2
 CONFIG_CMDLINE="earlycon console=ttySIF0 root=/dev/mmcblk0p1 rootwait ro"
 CONFIG_CMDLINE_FORCE=y
+CONFIG_BUILTIN_DTB=y
+CONFIG_BUILTIN_DTB_SOURCE="canaan/k210_generic"
 # CONFIG_SECCOMP is not set
 # CONFIG_STACKPROTECTOR is not set
 # CONFIG_GCC_PLUGINS is not set