Add initial support for Ingenic X1000 SoC and Y&A CU Neo board v4.

Add initial support for Ingenic X1000 SoC and Y&A CU Neo board v4.

[Zhou Yanjie]

1.Adjust the description in "devices.yaml" to make it more reasonable.
2.Adjust "model" in "cu1000.dts" to match the description in "devices.yaml".
3.Adjust "bool" in "Kconfig" to avoid duplicate names with subsequent boards.
4.Add pdma controller DT node and Update defconfig for pdma controller.

[PATCH v4 1/6] MIPS: Ingenic: Initial X1000 support.

[Zhou Yanjie]

Support the Ingenic X1000 SoC using the code under arch/mips/jz4740.
This is left unselectable in Kconfig until a X1000 based board is
added in a later commit.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---

Notes:
    v1->v2:
    Rebase on top of mips-next, use ingenic-timer driver
    for system timer and clocksource.
    
    v2->v3:
    Drop the 'apb' node.
    
    v3->v4:
    Adjust the node order to make it consistent with
    other Ingenic boards.

 arch/mips/boot/dts/ingenic/x1000.dtsi | 176 ++++++++++++++++++++++++++++++++++
 arch/mips/jz4740/Kconfig              |   6 ++
 2 files changed, 182 insertions(+)
 create mode 100644 arch/mips/boot/dts/ingenic/x1000.dtsi

diff --git a/arch/mips/boot/dts/ingenic/x1000.dtsi b/arch/mips/boot/dts/ingenic/x1000.dtsi
new file mode 100644
index 00000000..9e55edd
--- /dev/null
+++ b/arch/mips/boot/dts/ingenic/x1000.dtsi
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <dt-bindings/clock/x1000-cgu.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "ingenic,x1000", "ingenic,x1000e";
+
+	cpuintc: interrupt-controller {
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		interrupt-controller;
+		compatible = "mti,cpu-interrupt-controller";
+	};
+
+	intc: interrupt-controller@10001000 {
+		compatible = "ingenic,x1000-intc", "ingenic,jz4780-intc";
+		reg = <0x10001000 0x50>;
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+
+		interrupt-parent = <&cpuintc>;
+		interrupts = <2>;
+	};
+
+	exclk: ext {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+	};
+
+	rtclk: rtc {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+	};
+
+	cgu: x1000-cgu@10000000 {
+		compatible = "ingenic,x1000-cgu";
+		reg = <0x10000000 0x100>;
+
+		#clock-cells = <1>;
+
+		clocks = <&exclk>, <&rtclk>;
+		clock-names = "ext", "rtc";
+	};
+
+	tcu: timer@10002000 {
+		compatible = "ingenic,x1000-tcu",
+				 "ingenic,jz4770-tcu",
+				 "simple-mfd";
+		reg = <0x10002000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x10002000 0x1000>;
+
+		#clock-cells = <1>;
+
+		clocks = <&cgu X1000_CLK_RTCLK
+			  &cgu X1000_CLK_EXCLK
+			  &cgu X1000_CLK_PCLK>;
+		clock-names = "rtc", "ext", "pclk";
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <27 26 25>;
+	};
+
+	pinctrl: pin-controller@10010000 {
+		compatible = "ingenic,x1000-pinctrl";
+		reg = <0x10010000 0x800>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		gpa: gpio@0 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <0>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 0 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <17>;
+		};
+
+		gpb: gpio@1 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <1>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 32 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <16>;
+		};
+
+		gpc: gpio@2 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <2>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 64 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <15>;
+		};
+
+		gpd: gpio@3 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <3>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 96 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <14>;
+		};
+	};
+
+	uart0: serial@10030000 {
+		compatible = "ingenic,x1000-uart";
+		reg = <0x10030000 0x100>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <51>;
+
+		clocks = <&exclk>, <&cgu X1000_CLK_UART0>;
+		clock-names = "baud", "module";
+
+		status = "disabled";
+	};
+
+	uart1: serial@10031000 {
+		compatible = "ingenic,x1000-uart";
+		reg = <0x10031000 0x100>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <50>;
+
+		clocks = <&exclk>, <&cgu X1000_CLK_UART1>;
+		clock-names = "baud", "module";
+
+		status = "disabled";
+	};
+
+	uart2: serial@10032000 {
+		compatible = "ingenic,x1000-uart";
+		reg = <0x10032000 0x100>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <49>;
+
+		clocks = <&exclk>, <&cgu X1000_CLK_UART2>;
+		clock-names = "baud", "module";
+
+		status = "disabled";
+	};
+};
diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
index 4dd0c44..6b96844 100644
--- a/arch/mips/jz4740/Kconfig
+++ b/arch/mips/jz4740/Kconfig
@@ -33,3 +33,9 @@ config MACH_JZ4780
 	select MIPS_CPU_SCACHE
 	select SYS_HAS_CPU_MIPS32_R2
 	select SYS_SUPPORTS_HIGHMEM
+
+config MACH_X1000
+	bool
+	select MIPS_CPU_SCACHE
+	select SYS_HAS_CPU_MIPS32_R2
+	select SYS_SUPPORTS_HIGHMEM
-- 
2.7.4

[PATCH v4 2/6] dt-bindings: Document yna vendor-prefix.

[Zhou Yanjie]

The "yna" is an acronym of the "YSH & ATIL".

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---

Notes:
    v1->v2:
    No change.
    
    v2->v3:
    No change.
    
    v3->v4:
    No change.

 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 967e78c..47ddd88 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1054,6 +1054,8 @@ patternProperties:
     description: Xilinx
   "^xunlong,.*":
     description: Shenzhen Xunlong Software CO.,Limited
+  "^yna,.*":
+    description: YSH & ATIL
   "^yones-toptech,.*":
     description: Yones Toptech Co., Ltd.
   "^ysoft,.*":
-- 
2.7.4

[PATCH v4 3/6] dt-bindings: MIPS: Add Ingenic XBurst based boards.

[Zhou Yanjie]

Add Ingenic XBurst based boards, prepare for later dts.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---

Notes:
    v1->v2:
    No change.
    
    v2->v3:
    No change.
    
    v3->v4:
    Adjust the description to make it more reasonable.

 .../devicetree/bindings/mips/ingenic/devices.yaml  | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mips/ingenic/devices.yaml

diff --git a/Documentation/devicetree/bindings/mips/ingenic/devices.yaml b/Documentation/devicetree/bindings/mips/ingenic/devices.yaml
new file mode 100644
index 00000000..a6f5056
--- /dev/null
+++ b/Documentation/devicetree/bindings/mips/ingenic/devices.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mips/ingenic/devices.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ingenic XBurst based Platforms Device Tree Bindings
+
+maintainers:
+  - Zhou Yanjie <zhouyanjie@zoho.com>
+description: |
+  Devices with a Ingenic XBurst CPU shall have the following properties.
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+
+      - description: Qi Hardware Ben NanoNote
+        items:
+          - const: qi,lb60
+
+      - description: Game Consoles Worldwide GCW Zero
+        items:
+          - const: gcw,zero
+
+      - description: MIPS Creator CI20
+        items:
+          - const: img,ci20
+
+      - description: YSH & ATIL General Board CU Neo
+        items:
+          - const: yna,cu1000
+...
-- 
2.7.4

[PATCH v4 4/6] MIPS: Ingenic: Initial YSH & ATIL CU Neo board support.

[Zhou Yanjie]

Add a device tree for the Ingenic X1000 based YSH & ATIL CU Neo board.
Note that this is unselectable via Kconfig until the X1000 SoC is made
selectable in a later commit.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---

Notes:
    v1->v2:
    Rebase on top of mips-next, use TCU for system timer and clocksource.
    
    v2->v3:
    No change.
    
    v3->v4:
    1.Adjust "model" in "cu1000.dts" to match the description in "devices.yaml".
    2.Adjust "bool" in "Kconfig" to avoid duplicate names with subsequent boards.

 arch/mips/boot/dts/ingenic/Makefile   |   1 +
 arch/mips/boot/dts/ingenic/cu1000.dts |  52 ++++++++++++++++++
 arch/mips/configs/cu1000_defconfig    | 100 ++++++++++++++++++++++++++++++++++
 arch/mips/jz4740/Kconfig              |   4 ++
 4 files changed, 157 insertions(+)
 create mode 100644 arch/mips/boot/dts/ingenic/cu1000.dts
 create mode 100644 arch/mips/configs/cu1000_defconfig

diff --git a/arch/mips/boot/dts/ingenic/Makefile b/arch/mips/boot/dts/ingenic/Makefile
index 9cc4844..f6db7bb 100644
--- a/arch/mips/boot/dts/ingenic/Makefile
+++ b/arch/mips/boot/dts/ingenic/Makefile
@@ -2,5 +2,6 @@
 dtb-$(CONFIG_JZ4740_QI_LB60)	+= qi_lb60.dtb
 dtb-$(CONFIG_JZ4770_GCW0)	+= gcw0.dtb
 dtb-$(CONFIG_JZ4780_CI20)	+= ci20.dtb
+dtb-$(CONFIG_X1000_CU1000)	+= cu1000.dtb
 
 obj-$(CONFIG_BUILTIN_DTB)	+= $(addsuffix .o, $(dtb-y))
diff --git a/arch/mips/boot/dts/ingenic/cu1000.dts b/arch/mips/boot/dts/ingenic/cu1000.dts
new file mode 100644
index 00000000..f92f6af
--- /dev/null
+++ b/arch/mips/boot/dts/ingenic/cu1000.dts
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "x1000.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/clock/ingenic,tcu.h>
+
+/ {
+	compatible = "yna,cu1000", "ingenic,x1000";
+	model = "YSH & ATIL General Board CU Neo";
+
+	aliases {
+		serial2 = &uart2;
+	};
+
+	chosen {
+		stdout-path = &uart2;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x04000000>;
+	};
+};
+
+&exclk {
+	clock-frequency = <24000000>;
+};
+
+&tcu {
+	/* 1500 kHz for the system timer and clocksource */
+	assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER2>;
+	assigned-clock-rates = <1500000>, <1500000>;
+
+	/* Use channel #1 for the system timer channel #2 for the clocksource */
+	ingenic,pwm-channels-mask = <0xfa>;
+};
+
+&uart2 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_uart2>;
+};
+
+&pinctrl {
+	pins_uart2: uart2 {
+		function = "uart2";
+		groups = "uart2-data-d";
+		bias-disable;
+	};
+};
diff --git a/arch/mips/configs/cu1000_defconfig b/arch/mips/configs/cu1000_defconfig
new file mode 100644
index 00000000..88729ee
--- /dev/null
+++ b/arch/mips/configs/cu1000_defconfig
@@ -0,0 +1,100 @@
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_KERNEL_GZIP=y
+CONFIG_SYSVIPC=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_CGROUPS=y
+CONFIG_MEMCG=y
+CONFIG_MEMCG_KMEM=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_NAMESPACES=y
+CONFIG_USER_NS=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="arch/mips/boot/ramdisk.cpio.gz"
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SYSCTL_SYSCALL=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_SLAB=y
+CONFIG_MACH_INGENIC=y
+CONFIG_X1000_CU1000=y
+CONFIG_HIGHMEM=y
+CONFIG_HZ_100=y
+CONFIG_HZ=100
+# CONFIG_SECCOMP is not set
+# CONFIG_SUSPEND is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+# CONFIG_COMPACTION is not set
+CONFIG_CMA=y
+CONFIG_CMA_AREAS=7
+CONFIG_UEVENT_HELPER=y
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+# CONFIG_FW_LOADER is not set
+# CONFIG_ALLOW_DEV_COREDUMP is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_VT_HW_CONSOLE_BINDING=y
+CONFIG_LEGACY_PTY_COUNT=2
+CONFIG_SERIAL_EARLYCON=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=3
+CONFIG_SERIAL_8250_RUNTIME_UARTS=3
+CONFIG_SERIAL_8250_INGENIC=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_GPIO_SYSFS=y
+# CONFIG_HWMON is not set
+# CONFIG_LCD_CLASS_DEVICE is not set
+# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_HID is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_NVMEM=y
+CONFIG_NVMEM_SYSFS=y
+CONFIG_EXT4_FS=y
+# CONFIG_DNOTIFY is not set
+CONFIG_PROC_KCORE=y
+# CONFIG_PROC_PAGE_MONITOR is not set
+CONFIG_TMPFS=y
+CONFIG_CONFIGFS_FS=y
+CONFIG_NLS=y
+CONFIG_NLS_CODEPAGE_936=y
+CONFIG_NLS_CODEPAGE_950=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_AES=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_LZO=y
+CONFIG_PRINTK_TIME=y
+CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
+CONFIG_CONSOLE_LOGLEVEL_QUIET=15
+CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
+CONFIG_DEBUG_INFO=y
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_DEBUG_FS=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_PANIC_ON_OOPS=y
+CONFIG_PANIC_TIMEOUT=10
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+CONFIG_STACKTRACE=y
+# CONFIG_FTRACE is not set
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyS2,115200n8 mem=32M@0x0 earlycon clk_ignore_unused"
+CONFIG_CMDLINE_OVERRIDE=y
diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
index 6b96844..ccaf507 100644
--- a/arch/mips/jz4740/Kconfig
+++ b/arch/mips/jz4740/Kconfig
@@ -16,6 +16,10 @@ config JZ4780_CI20
 	bool "MIPS Creator CI20"
 	select MACH_JZ4780
 
+config X1000_CU1000
+	bool "YSH & ATIL General Module CU1000"
+	select MACH_X1000
+
 endchoice
 
 config MACH_JZ4740
-- 
2.7.4

[PATCH v4 5/6] MIPS: X1000: Add pdma controller DT node.

[Zhou Yanjie]

Add the appropriate DT node to probe the pdma controller driver
using the devicetree.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---

Notes:
    v4:
    New patch.

 arch/mips/boot/dts/ingenic/x1000.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/mips/boot/dts/ingenic/x1000.dtsi b/arch/mips/boot/dts/ingenic/x1000.dtsi
index 9e55edd..edfa70d 100644
--- a/arch/mips/boot/dts/ingenic/x1000.dtsi
+++ b/arch/mips/boot/dts/ingenic/x1000.dtsi
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <dt-bindings/clock/x1000-cgu.h>
+#include <dt-bindings/dma/x1000-dma.h>
 
 / {
 	#address-cells = <1>;
@@ -173,4 +174,16 @@
 
 		status = "disabled";
 	};
+
+	pdma: dma-controller@13420000 {
+		compatible = "ingenic,x1000-dma";
+		reg = <0x13420000 0x400
+			   0x13421000 0x40>;
+		#dma-cells = <2>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <10>;
+
+		clocks = <&cgu X1000_CLK_PDMA>;
+	};
 };
-- 
2.7.4

[PATCH v4 6/6] MIPS: CU1000: Update defconfig for pdma controller.

[Zhou Yanjie]

Selected pdma controller support by default.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---

Notes:
    v4:
    New patch.

 arch/mips/configs/cu1000_defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/configs/cu1000_defconfig b/arch/mips/configs/cu1000_defconfig
index 88729ee..9f26d00 100644
--- a/arch/mips/configs/cu1000_defconfig
+++ b/arch/mips/configs/cu1000_defconfig
@@ -62,6 +62,8 @@ CONFIG_GPIO_SYSFS=y
 # CONFIG_VGA_CONSOLE is not set
 # CONFIG_HID is not set
 # CONFIG_USB_SUPPORT is not set
+CONFIG_DMADEVICES=y
+CONFIG_DMA_JZ4780=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_NVMEM=y
 CONFIG_NVMEM_SYSFS=y
-- 
2.7.4

Re: [PATCH v4 5/6] MIPS: X1000: Add pdma controller DT node.

[Paul Cercueil]

Hi Zhou,


Le mer., nov. 27, 2019 at 01:06, Zhou Yanjie <zhouyanjie@zoho.com> a 
écrit :
> Add the appropriate DT node to probe the pdma controller driver
> using the devicetree.
> 
> Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
> ---
> 
> Notes:
>     v4:
>     New patch.
> 
>  arch/mips/boot/dts/ingenic/x1000.dtsi | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/mips/boot/dts/ingenic/x1000.dtsi 
> b/arch/mips/boot/dts/ingenic/x1000.dtsi
> index 9e55edd..edfa70d 100644
> --- a/arch/mips/boot/dts/ingenic/x1000.dtsi
> +++ b/arch/mips/boot/dts/ingenic/x1000.dtsi
> @@ -1,5 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  #include <dt-bindings/clock/x1000-cgu.h>
> +#include <dt-bindings/dma/x1000-dma.h>

You're not using any macro from that include file, so there's no need 
to have it here.

Cheers,
-Paul


> 
>  / {
>  	#address-cells = <1>;
> @@ -173,4 +174,16 @@
> 
>  		status = "disabled";
>  	};
> +
> +	pdma: dma-controller@13420000 {
> +		compatible = "ingenic,x1000-dma";
> +		reg = <0x13420000 0x400
> +			   0x13421000 0x40>;
> +		#dma-cells = <2>;
> +
> +		interrupt-parent = <&intc>;
> +		interrupts = <10>;
> +
> +		clocks = <&cgu X1000_CLK_PDMA>;
> +	};
>  };
> --
> 2.7.4
> 
> 

Re: [PATCH v4 4/6] MIPS: Ingenic: Initial YSH & ATIL CU Neo board support.

[Paul Cercueil]

Hi Zhou,


Le mer., nov. 27, 2019 at 01:06, Zhou Yanjie <zhouyanjie@zoho.com> a 
écrit :
> Add a device tree for the Ingenic X1000 based YSH & ATIL CU Neo board.
> Note that this is unselectable via Kconfig until the X1000 SoC is made
> selectable in a later commit.
> 
> Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
> ---
> 
> Notes:
>     v1->v2:
>     Rebase on top of mips-next, use TCU for system timer and 
> clocksource.
> 
>     v2->v3:
>     No change.
> 
>     v3->v4:
>     1.Adjust "model" in "cu1000.dts" to match the description in 
> "devices.yaml".
>     2.Adjust "bool" in "Kconfig" to avoid duplicate names with 
> subsequent boards.
> 
>  arch/mips/boot/dts/ingenic/Makefile   |   1 +
>  arch/mips/boot/dts/ingenic/cu1000.dts |  52 ++++++++++++++++++
>  arch/mips/configs/cu1000_defconfig    | 100 
> ++++++++++++++++++++++++++++++++++
>  arch/mips/jz4740/Kconfig              |   4 ++
>  4 files changed, 157 insertions(+)
>  create mode 100644 arch/mips/boot/dts/ingenic/cu1000.dts
>  create mode 100644 arch/mips/configs/cu1000_defconfig
> 
> diff --git a/arch/mips/boot/dts/ingenic/Makefile 
> b/arch/mips/boot/dts/ingenic/Makefile
> index 9cc4844..f6db7bb 100644
> --- a/arch/mips/boot/dts/ingenic/Makefile
> +++ b/arch/mips/boot/dts/ingenic/Makefile
> @@ -2,5 +2,6 @@
>  dtb-$(CONFIG_JZ4740_QI_LB60)	+= qi_lb60.dtb
>  dtb-$(CONFIG_JZ4770_GCW0)	+= gcw0.dtb
>  dtb-$(CONFIG_JZ4780_CI20)	+= ci20.dtb
> +dtb-$(CONFIG_X1000_CU1000)	+= cu1000.dtb
> 
>  obj-$(CONFIG_BUILTIN_DTB)	+= $(addsuffix .o, $(dtb-y))
> diff --git a/arch/mips/boot/dts/ingenic/cu1000.dts 
> b/arch/mips/boot/dts/ingenic/cu1000.dts
> new file mode 100644
> index 00000000..f92f6af
> --- /dev/null
> +++ b/arch/mips/boot/dts/ingenic/cu1000.dts
> @@ -0,0 +1,52 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/dts-v1/;
> +
> +#include "x1000.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/clock/ingenic,tcu.h>
> +
> +/ {
> +	compatible = "yna,cu1000", "ingenic,x1000";
> +	model = "YSH & ATIL General Board CU Neo";
> +
> +	aliases {
> +		serial2 = &uart2;
> +	};
> +
> +	chosen {
> +		stdout-path = &uart2;
> +	};
> +
> +	memory {
> +		device_type = "memory";
> +		reg = <0x0 0x04000000>;
> +	};
> +};
> +
> +&exclk {
> +	clock-frequency = <24000000>;
> +};
> +
> +&tcu {
> +	/* 1500 kHz for the system timer and clocksource */
> +	assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER2>;
> +	assigned-clock-rates = <1500000>, <1500000>;
> +
> +	/* Use channel #1 for the system timer channel #2 for the 
> clocksource */
> +	ingenic,pwm-channels-mask = <0xfa>;

 From the mask used, I'm gessing that you're reserving channels #0 and 
#2, not #1 and #2.

> +};
> +
> +&uart2 {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pins_uart2>;
> +};
> +
> +&pinctrl {
> +	pins_uart2: uart2 {
> +		function = "uart2";
> +		groups = "uart2-data-d";
> +		bias-disable;
> +	};
> +};
> diff --git a/arch/mips/configs/cu1000_defconfig 
> b/arch/mips/configs/cu1000_defconfig
> new file mode 100644
> index 00000000..88729ee
> --- /dev/null
> +++ b/arch/mips/configs/cu1000_defconfig
> @@ -0,0 +1,100 @@
> +CONFIG_LOCALVERSION_AUTO=y
> +CONFIG_KERNEL_GZIP=y
> +CONFIG_SYSVIPC=y
> +CONFIG_NO_HZ_IDLE=y
> +CONFIG_HIGH_RES_TIMERS=y
> +CONFIG_PREEMPT=y
> +CONFIG_IKCONFIG=y
> +CONFIG_IKCONFIG_PROC=y
> +CONFIG_LOG_BUF_SHIFT=14
> +CONFIG_CGROUPS=y
> +CONFIG_MEMCG=y
> +CONFIG_MEMCG_KMEM=y
> +CONFIG_CGROUP_SCHED=y
> +CONFIG_CGROUP_FREEZER=y
> +CONFIG_CGROUP_DEVICE=y
> +CONFIG_CGROUP_CPUACCT=y
> +CONFIG_NAMESPACES=y
> +CONFIG_USER_NS=y
> +CONFIG_BLK_DEV_INITRD=y
> +CONFIG_INITRAMFS_SOURCE="arch/mips/boot/ramdisk.cpio.gz"
> +CONFIG_CC_OPTIMIZE_FOR_SIZE=y
> +CONFIG_SYSCTL_SYSCALL=y
> +CONFIG_KALLSYMS_ALL=y
> +CONFIG_EMBEDDED=y
> +# CONFIG_VM_EVENT_COUNTERS is not set
> +# CONFIG_COMPAT_BRK is not set
> +CONFIG_SLAB=y
> +CONFIG_MACH_INGENIC=y
> +CONFIG_X1000_CU1000=y
> +CONFIG_HIGHMEM=y
> +CONFIG_HZ_100=y
> +CONFIG_HZ=100

This line looks malformed.

> +# CONFIG_SECCOMP is not set
> +# CONFIG_SUSPEND is not set
> +# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
> +# CONFIG_COMPACTION is not set
> +CONFIG_CMA=y
> +CONFIG_CMA_AREAS=7
> +CONFIG_UEVENT_HELPER=y
> +CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
> +CONFIG_DEVTMPFS=y
> +# CONFIG_FW_LOADER is not set
> +# CONFIG_ALLOW_DEV_COREDUMP is not set
> +# CONFIG_INPUT_MOUSEDEV is not set
> +# CONFIG_INPUT_KEYBOARD is not set
> +# CONFIG_INPUT_MOUSE is not set
> +# CONFIG_SERIO is not set
> +CONFIG_VT_HW_CONSOLE_BINDING=y
> +CONFIG_LEGACY_PTY_COUNT=2
> +CONFIG_SERIAL_EARLYCON=y
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y
> +CONFIG_SERIAL_8250_NR_UARTS=3
> +CONFIG_SERIAL_8250_RUNTIME_UARTS=3
> +CONFIG_SERIAL_8250_INGENIC=y
> +CONFIG_SERIAL_OF_PLATFORM=y
> +# CONFIG_HW_RANDOM is not set
> +CONFIG_GPIO_SYSFS=y
> +# CONFIG_HWMON is not set
> +# CONFIG_LCD_CLASS_DEVICE is not set
> +# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
> +# CONFIG_VGA_CONSOLE is not set
> +# CONFIG_HID is not set
> +# CONFIG_USB_SUPPORT is not set
> +# CONFIG_IOMMU_SUPPORT is not set
> +CONFIG_NVMEM=y
> +CONFIG_NVMEM_SYSFS=y
> +CONFIG_EXT4_FS=y
> +# CONFIG_DNOTIFY is not set
> +CONFIG_PROC_KCORE=y
> +# CONFIG_PROC_PAGE_MONITOR is not set
> +CONFIG_TMPFS=y
> +CONFIG_CONFIGFS_FS=y
> +CONFIG_NLS=y
> +CONFIG_NLS_CODEPAGE_936=y
> +CONFIG_NLS_CODEPAGE_950=y
> +CONFIG_NLS_ASCII=y
> +CONFIG_NLS_ISO8859_1=y
> +CONFIG_NLS_UTF8=y
> +CONFIG_CRYPTO_ECHAINIV=y
> +CONFIG_CRYPTO_AES=y
> +CONFIG_CRYPTO_DEFLATE=y
> +CONFIG_CRYPTO_LZO=y
> +CONFIG_PRINTK_TIME=y
> +CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
> +CONFIG_CONSOLE_LOGLEVEL_QUIET=15
> +CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
> +CONFIG_DEBUG_INFO=y
> +CONFIG_STRIP_ASM_SYMS=y
> +CONFIG_DEBUG_FS=y
> +CONFIG_MAGIC_SYSRQ=y
> +CONFIG_PANIC_ON_OOPS=y
> +CONFIG_PANIC_TIMEOUT=10
> +# CONFIG_SCHED_DEBUG is not set
> +# CONFIG_DEBUG_PREEMPT is not set
> +CONFIG_STACKTRACE=y
> +# CONFIG_FTRACE is not set
> +CONFIG_CMDLINE_BOOL=y
> +CONFIG_CMDLINE="console=ttyS2,115200n8 mem=32M@0x0 earlycon 
> clk_ignore_unused"

You already specify the stdout-path in the devicetree, no need to pass 
the "console" parameter.

For the "mem" parameter, it's already set in the devicetree, so no need 
to set it again here.
Besides, in the devicetree it is set to 64 MiB.

Why is clk_ignore_unused needed?

Cheers,
-Paul

> +CONFIG_CMDLINE_OVERRIDE=y
> diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
> index 6b96844..ccaf507 100644
> --- a/arch/mips/jz4740/Kconfig
> +++ b/arch/mips/jz4740/Kconfig
> @@ -16,6 +16,10 @@ config JZ4780_CI20
>  	bool "MIPS Creator CI20"
>  	select MACH_JZ4780
> 
> +config X1000_CU1000
> +	bool "YSH & ATIL General Module CU1000"
> +	select MACH_X1000
> +
>  endchoice
> 
>  config MACH_JZ4740
> --
> 2.7.4
> 
> 

Re: [PATCH v4 5/6] MIPS: X1000: Add pdma controller DT node.

[Zhou Yanjie]

Hi Paul,

On 2019年11月28日 00:48, Paul Cercueil wrote:
> Hi Zhou,
>
>
> Le mer., nov. 27, 2019 at 01:06, Zhou Yanjie <zhouyanjie@zoho.com> a 
> écrit :
>> Add the appropriate DT node to probe the pdma controller driver
>> using the devicetree.
>>
>> Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
>> ---
>>
>> Notes:
>>     v4:
>>     New patch.
>>
>>  arch/mips/boot/dts/ingenic/x1000.dtsi | 13 +++++++++++++
>>  1 file changed, 13 insertions(+)
>>
>> diff --git a/arch/mips/boot/dts/ingenic/x1000.dtsi 
>> b/arch/mips/boot/dts/ingenic/x1000.dtsi
>> index 9e55edd..edfa70d 100644
>> --- a/arch/mips/boot/dts/ingenic/x1000.dtsi
>> +++ b/arch/mips/boot/dts/ingenic/x1000.dtsi
>> @@ -1,5 +1,6 @@
>>  // SPDX-License-Identifier: GPL-2.0
>>  #include <dt-bindings/clock/x1000-cgu.h>
>> +#include <dt-bindings/dma/x1000-dma.h>
>
> You're not using any macro from that include file, so there's no need 
> to have it here.
>

Sure, I will fix this in v7.

Thanks and best regards!

> Cheers,
> -Paul
>
>
>>
>>  / {
>>      #address-cells = <1>;
>> @@ -173,4 +174,16 @@
>>
>>          status = "disabled";
>>      };
>> +
>> +    pdma: dma-controller@13420000 {
>> +        compatible = "ingenic,x1000-dma";
>> +        reg = <0x13420000 0x400
>> +               0x13421000 0x40>;
>> +        #dma-cells = <2>;
>> +
>> +        interrupt-parent = <&intc>;
>> +        interrupts = <10>;
>> +
>> +        clocks = <&cgu X1000_CLK_PDMA>;
>> +    };
>>  };
>> -- 
>> 2.7.4
>>
>>
>
>

Re: [PATCH v4 4/6] MIPS: Ingenic: Initial YSH & ATIL CU Neo board support.

[Zhou Yanjie]

Hi Paul,

On 2019年11月28日 00:57, Paul Cercueil wrote:
> Hi Zhou,
>
>
> Le mer., nov. 27, 2019 at 01:06, Zhou Yanjie <zhouyanjie@zoho.com> a 
> écrit :
>> Add a device tree for the Ingenic X1000 based YSH & ATIL CU Neo board.
>> Note that this is unselectable via Kconfig until the X1000 SoC is made
>> selectable in a later commit.
>>
>> Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
>> ---
>>
>> Notes:
>>     v1->v2:
>>     Rebase on top of mips-next, use TCU for system timer and 
>> clocksource.
>>
>>     v2->v3:
>>     No change.
>>
>>     v3->v4:
>>     1.Adjust "model" in "cu1000.dts" to match the description in 
>> "devices.yaml".
>>     2.Adjust "bool" in "Kconfig" to avoid duplicate names with 
>> subsequent boards.
>>
>>  arch/mips/boot/dts/ingenic/Makefile   |   1 +
>>  arch/mips/boot/dts/ingenic/cu1000.dts |  52 ++++++++++++++++++
>>  arch/mips/configs/cu1000_defconfig    | 100 
>> ++++++++++++++++++++++++++++++++++
>>  arch/mips/jz4740/Kconfig              |   4 ++
>>  4 files changed, 157 insertions(+)
>>  create mode 100644 arch/mips/boot/dts/ingenic/cu1000.dts
>>  create mode 100644 arch/mips/configs/cu1000_defconfig
>>
>> diff --git a/arch/mips/boot/dts/ingenic/Makefile 
>> b/arch/mips/boot/dts/ingenic/Makefile
>> index 9cc4844..f6db7bb 100644
>> --- a/arch/mips/boot/dts/ingenic/Makefile
>> +++ b/arch/mips/boot/dts/ingenic/Makefile
>> @@ -2,5 +2,6 @@
>>  dtb-$(CONFIG_JZ4740_QI_LB60)    += qi_lb60.dtb
>>  dtb-$(CONFIG_JZ4770_GCW0)    += gcw0.dtb
>>  dtb-$(CONFIG_JZ4780_CI20)    += ci20.dtb
>> +dtb-$(CONFIG_X1000_CU1000)    += cu1000.dtb
>>
>>  obj-$(CONFIG_BUILTIN_DTB)    += $(addsuffix .o, $(dtb-y))
>> diff --git a/arch/mips/boot/dts/ingenic/cu1000.dts 
>> b/arch/mips/boot/dts/ingenic/cu1000.dts
>> new file mode 100644
>> index 00000000..f92f6af
>> --- /dev/null
>> +++ b/arch/mips/boot/dts/ingenic/cu1000.dts
>> @@ -0,0 +1,52 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/dts-v1/;
>> +
>> +#include "x1000.dtsi"
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/clock/ingenic,tcu.h>
>> +
>> +/ {
>> +    compatible = "yna,cu1000", "ingenic,x1000";
>> +    model = "YSH & ATIL General Board CU Neo";
>> +
>> +    aliases {
>> +        serial2 = &uart2;
>> +    };
>> +
>> +    chosen {
>> +        stdout-path = &uart2;
>> +    };
>> +
>> +    memory {
>> +        device_type = "memory";
>> +        reg = <0x0 0x04000000>;
>> +    };
>> +};
>> +
>> +&exclk {
>> +    clock-frequency = <24000000>;
>> +};
>> +
>> +&tcu {
>> +    /* 1500 kHz for the system timer and clocksource */
>> +    assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER2>;
>> +    assigned-clock-rates = <1500000>, <1500000>;
>> +
>> +    /* Use channel #1 for the system timer channel #2 for the 
>> clocksource */
>> +    ingenic,pwm-channels-mask = <0xfa>;
>
> From the mask used, I'm gessing that you're reserving channels #0 and 
> #2, not #1 and #2.
>

My fault, you are right, it use channels #0 and #2.

>> +};
>> +
>> +&uart2 {
>> +    status = "okay";
>> +
>> +    pinctrl-names = "default";
>> +    pinctrl-0 = <&pins_uart2>;
>> +};
>> +
>> +&pinctrl {
>> +    pins_uart2: uart2 {
>> +        function = "uart2";
>> +        groups = "uart2-data-d";
>> +        bias-disable;
>> +    };
>> +};
>> diff --git a/arch/mips/configs/cu1000_defconfig 
>> b/arch/mips/configs/cu1000_defconfig
>> new file mode 100644
>> index 00000000..88729ee
>> --- /dev/null
>> +++ b/arch/mips/configs/cu1000_defconfig
>> @@ -0,0 +1,100 @@
>> +CONFIG_LOCALVERSION_AUTO=y
>> +CONFIG_KERNEL_GZIP=y
>> +CONFIG_SYSVIPC=y
>> +CONFIG_NO_HZ_IDLE=y
>> +CONFIG_HIGH_RES_TIMERS=y
>> +CONFIG_PREEMPT=y
>> +CONFIG_IKCONFIG=y
>> +CONFIG_IKCONFIG_PROC=y
>> +CONFIG_LOG_BUF_SHIFT=14
>> +CONFIG_CGROUPS=y
>> +CONFIG_MEMCG=y
>> +CONFIG_MEMCG_KMEM=y
>> +CONFIG_CGROUP_SCHED=y
>> +CONFIG_CGROUP_FREEZER=y
>> +CONFIG_CGROUP_DEVICE=y
>> +CONFIG_CGROUP_CPUACCT=y
>> +CONFIG_NAMESPACES=y
>> +CONFIG_USER_NS=y
>> +CONFIG_BLK_DEV_INITRD=y
>> +CONFIG_INITRAMFS_SOURCE="arch/mips/boot/ramdisk.cpio.gz"
>> +CONFIG_CC_OPTIMIZE_FOR_SIZE=y
>> +CONFIG_SYSCTL_SYSCALL=y
>> +CONFIG_KALLSYMS_ALL=y
>> +CONFIG_EMBEDDED=y
>> +# CONFIG_VM_EVENT_COUNTERS is not set
>> +# CONFIG_COMPAT_BRK is not set
>> +CONFIG_SLAB=y
>> +CONFIG_MACH_INGENIC=y
>> +CONFIG_X1000_CU1000=y
>> +CONFIG_HIGHMEM=y
>> +CONFIG_HZ_100=y
>> +CONFIG_HZ=100
>
> This line looks malformed.

Ok, I'll remove it in v7.

>
>> +# CONFIG_SECCOMP is not set
>> +# CONFIG_SUSPEND is not set
>> +# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
>> +# CONFIG_COMPACTION is not set
>> +CONFIG_CMA=y
>> +CONFIG_CMA_AREAS=7
>> +CONFIG_UEVENT_HELPER=y
>> +CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
>> +CONFIG_DEVTMPFS=y
>> +# CONFIG_FW_LOADER is not set
>> +# CONFIG_ALLOW_DEV_COREDUMP is not set
>> +# CONFIG_INPUT_MOUSEDEV is not set
>> +# CONFIG_INPUT_KEYBOARD is not set
>> +# CONFIG_INPUT_MOUSE is not set
>> +# CONFIG_SERIO is not set
>> +CONFIG_VT_HW_CONSOLE_BINDING=y
>> +CONFIG_LEGACY_PTY_COUNT=2
>> +CONFIG_SERIAL_EARLYCON=y
>> +CONFIG_SERIAL_8250=y
>> +CONFIG_SERIAL_8250_CONSOLE=y
>> +CONFIG_SERIAL_8250_NR_UARTS=3
>> +CONFIG_SERIAL_8250_RUNTIME_UARTS=3
>> +CONFIG_SERIAL_8250_INGENIC=y
>> +CONFIG_SERIAL_OF_PLATFORM=y
>> +# CONFIG_HW_RANDOM is not set
>> +CONFIG_GPIO_SYSFS=y
>> +# CONFIG_HWMON is not set
>> +# CONFIG_LCD_CLASS_DEVICE is not set
>> +# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
>> +# CONFIG_VGA_CONSOLE is not set
>> +# CONFIG_HID is not set
>> +# CONFIG_USB_SUPPORT is not set
>> +# CONFIG_IOMMU_SUPPORT is not set
>> +CONFIG_NVMEM=y
>> +CONFIG_NVMEM_SYSFS=y
>> +CONFIG_EXT4_FS=y
>> +# CONFIG_DNOTIFY is not set
>> +CONFIG_PROC_KCORE=y
>> +# CONFIG_PROC_PAGE_MONITOR is not set
>> +CONFIG_TMPFS=y
>> +CONFIG_CONFIGFS_FS=y
>> +CONFIG_NLS=y
>> +CONFIG_NLS_CODEPAGE_936=y
>> +CONFIG_NLS_CODEPAGE_950=y
>> +CONFIG_NLS_ASCII=y
>> +CONFIG_NLS_ISO8859_1=y
>> +CONFIG_NLS_UTF8=y
>> +CONFIG_CRYPTO_ECHAINIV=y
>> +CONFIG_CRYPTO_AES=y
>> +CONFIG_CRYPTO_DEFLATE=y
>> +CONFIG_CRYPTO_LZO=y
>> +CONFIG_PRINTK_TIME=y
>> +CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
>> +CONFIG_CONSOLE_LOGLEVEL_QUIET=15
>> +CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
>> +CONFIG_DEBUG_INFO=y
>> +CONFIG_STRIP_ASM_SYMS=y
>> +CONFIG_DEBUG_FS=y
>> +CONFIG_MAGIC_SYSRQ=y
>> +CONFIG_PANIC_ON_OOPS=y
>> +CONFIG_PANIC_TIMEOUT=10
>> +# CONFIG_SCHED_DEBUG is not set
>> +# CONFIG_DEBUG_PREEMPT is not set
>> +CONFIG_STACKTRACE=y
>> +# CONFIG_FTRACE is not set
>> +CONFIG_CMDLINE_BOOL=y
>> +CONFIG_CMDLINE="console=ttyS2,115200n8 mem=32M@0x0 earlycon 
>> clk_ignore_unused"
>
> You already specify the stdout-path in the devicetree, no need to pass 
> the "console" parameter.
>

According the test log , if remove "console=ttyS2,115200n8", serial will not
initialized and will stuck after:

[    0.016815] printk: bootconsole [x1000_uart0] disabled

if remove both "console=ttyS2,115200n8" and "earlycon" it will stuck after:

Starting kernel ...

So I think both the "earlycon" and the "console=ttyS2,115200n8 earlycon" 
should be retained.

> For the "mem" parameter, it's already set in the devicetree, so no 
> need to set it again here.
> Besides, in the devicetree it is set to 64 MiB.

Ok, I'll remove them in v7.

>
> Why is clk_ignore_unused needed?

In fact, I also don't know why "clk_ignore_unused" needed.
This part of the parameter is copied from ci20_defconfig,
but according to the test, if remove "clk_ignore_unused",
it will stuck after :

[    0.374361] printk: bootconsole [x1000_uart0] disabled

Differeent from the case where "console=ttyS2,115200n8" is removed,
the serial is successfully initialized this time.

So I think "clk_ignore_unused" should be retained.

Thanks and best regards!

>
> Cheers,
> -Paul
>
>> +CONFIG_CMDLINE_OVERRIDE=y
>> diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
>> index 6b96844..ccaf507 100644
>> --- a/arch/mips/jz4740/Kconfig
>> +++ b/arch/mips/jz4740/Kconfig
>> @@ -16,6 +16,10 @@ config JZ4780_CI20
>>      bool "MIPS Creator CI20"
>>      select MACH_JZ4780
>>
>> +config X1000_CU1000
>> +    bool "YSH & ATIL General Module CU1000"
>> +    select MACH_X1000
>> +
>>  endchoice
>>
>>  config MACH_JZ4740
>> -- 
>> 2.7.4
>>
>>
>
>

Re: [PATCH v4 4/6] MIPS: Ingenic: Initial YSH & ATIL CU Neo board support.

[Paul Cercueil]

Hi Zhou,


Le jeu., nov. 28, 2019 at 13:11, Zhou Yanjie <zhouyanjie@zoho.com> a 
écrit :
> Hi Paul,
> 
> On 2019年11月28日 00:57, Paul Cercueil wrote:
>> Hi Zhou,
>> 
>> 
>> Le mer., nov. 27, 2019 at 01:06, Zhou Yanjie <zhouyanjie@zoho.com> a 
>> \x7fécrit :
>>> Add a device tree for the Ingenic X1000 based YSH & ATIL CU Neo 
>>> board.
>>> Note that this is unselectable via Kconfig until the X1000 SoC is 
>>> made
>>> selectable in a later commit.
>>> 
>>> Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
>>> ---
>>> 
>>> Notes:
>>>     v1->v2:
>>>     Rebase on top of mips-next, use TCU for system timer and 
>>> \x7f\x7fclocksource.
>>> 
>>>     v2->v3:
>>>     No change.
>>> 
>>>     v3->v4:
>>>     1.Adjust "model" in "cu1000.dts" to match the description in 
>>> \x7f\x7f"devices.yaml".
>>>     2.Adjust "bool" in "Kconfig" to avoid duplicate names with 
>>> \x7f\x7fsubsequent boards.
>>> 
>>>  arch/mips/boot/dts/ingenic/Makefile   |   1 +
>>>  arch/mips/boot/dts/ingenic/cu1000.dts |  52 ++++++++++++++++++
>>>  arch/mips/configs/cu1000_defconfig    | 100 
>>> \x7f\x7f++++++++++++++++++++++++++++++++++
>>>  arch/mips/jz4740/Kconfig              |   4 ++
>>>  4 files changed, 157 insertions(+)
>>>  create mode 100644 arch/mips/boot/dts/ingenic/cu1000.dts
>>>  create mode 100644 arch/mips/configs/cu1000_defconfig
>>> 
>>> diff --git a/arch/mips/boot/dts/ingenic/Makefile 
>>> \x7f\x7fb/arch/mips/boot/dts/ingenic/Makefile
>>> index 9cc4844..f6db7bb 100644
>>> --- a/arch/mips/boot/dts/ingenic/Makefile
>>> +++ b/arch/mips/boot/dts/ingenic/Makefile
>>> @@ -2,5 +2,6 @@
>>>  dtb-$(CONFIG_JZ4740_QI_LB60)    += qi_lb60.dtb
>>>  dtb-$(CONFIG_JZ4770_GCW0)    += gcw0.dtb
>>>  dtb-$(CONFIG_JZ4780_CI20)    += ci20.dtb
>>> +dtb-$(CONFIG_X1000_CU1000)    += cu1000.dtb
>>> 
>>>  obj-$(CONFIG_BUILTIN_DTB)    += $(addsuffix .o, $(dtb-y))
>>> diff --git a/arch/mips/boot/dts/ingenic/cu1000.dts 
>>> \x7f\x7fb/arch/mips/boot/dts/ingenic/cu1000.dts
>>> new file mode 100644
>>> index 00000000..f92f6af
>>> --- /dev/null
>>> +++ b/arch/mips/boot/dts/ingenic/cu1000.dts
>>> @@ -0,0 +1,52 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +/dts-v1/;
>>> +
>>> +#include "x1000.dtsi"
>>> +#include <dt-bindings/gpio/gpio.h>
>>> +#include <dt-bindings/clock/ingenic,tcu.h>
>>> +
>>> +/ {
>>> +    compatible = "yna,cu1000", "ingenic,x1000";
>>> +    model = "YSH & ATIL General Board CU Neo";
>>> +
>>> +    aliases {
>>> +        serial2 = &uart2;
>>> +    };
>>> +
>>> +    chosen {
>>> +        stdout-path = &uart2;
>>> +    };
>>> +
>>> +    memory {
>>> +        device_type = "memory";
>>> +        reg = <0x0 0x04000000>;
>>> +    };
>>> +};
>>> +
>>> +&exclk {
>>> +    clock-frequency = <24000000>;
>>> +};
>>> +
>>> +&tcu {
>>> +    /* 1500 kHz for the system timer and clocksource */
>>> +    assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER2>;
>>> +    assigned-clock-rates = <1500000>, <1500000>;
>>> +
>>> +    /* Use channel #1 for the system timer channel #2 for the 
>>> \x7f\x7fclocksource */
>>> +    ingenic,pwm-channels-mask = <0xfa>;
>> 
>> From the mask used, I'm gessing that you're reserving channels #0 
>> and \x7f#2, not #1 and #2.
>> 
> 
> My fault, you are right, it use channels #0 and #2.
> 
>>> +};
>>> +
>>> +&uart2 {
>>> +    status = "okay";
>>> +
>>> +    pinctrl-names = "default";
>>> +    pinctrl-0 = <&pins_uart2>;
>>> +};
>>> +
>>> +&pinctrl {
>>> +    pins_uart2: uart2 {
>>> +        function = "uart2";
>>> +        groups = "uart2-data-d";
>>> +        bias-disable;
>>> +    };
>>> +};
>>> diff --git a/arch/mips/configs/cu1000_defconfig 
>>> \x7f\x7fb/arch/mips/configs/cu1000_defconfig
>>> new file mode 100644
>>> index 00000000..88729ee
>>> --- /dev/null
>>> +++ b/arch/mips/configs/cu1000_defconfig
>>> @@ -0,0 +1,100 @@
>>> +CONFIG_LOCALVERSION_AUTO=y
>>> +CONFIG_KERNEL_GZIP=y
>>> +CONFIG_SYSVIPC=y
>>> +CONFIG_NO_HZ_IDLE=y
>>> +CONFIG_HIGH_RES_TIMERS=y
>>> +CONFIG_PREEMPT=y
>>> +CONFIG_IKCONFIG=y
>>> +CONFIG_IKCONFIG_PROC=y
>>> +CONFIG_LOG_BUF_SHIFT=14
>>> +CONFIG_CGROUPS=y
>>> +CONFIG_MEMCG=y
>>> +CONFIG_MEMCG_KMEM=y
>>> +CONFIG_CGROUP_SCHED=y
>>> +CONFIG_CGROUP_FREEZER=y
>>> +CONFIG_CGROUP_DEVICE=y
>>> +CONFIG_CGROUP_CPUACCT=y
>>> +CONFIG_NAMESPACES=y
>>> +CONFIG_USER_NS=y
>>> +CONFIG_BLK_DEV_INITRD=y
>>> +CONFIG_INITRAMFS_SOURCE="arch/mips/boot/ramdisk.cpio.gz"
>>> +CONFIG_CC_OPTIMIZE_FOR_SIZE=y
>>> +CONFIG_SYSCTL_SYSCALL=y
>>> +CONFIG_KALLSYMS_ALL=y
>>> +CONFIG_EMBEDDED=y
>>> +# CONFIG_VM_EVENT_COUNTERS is not set
>>> +# CONFIG_COMPAT_BRK is not set
>>> +CONFIG_SLAB=y
>>> +CONFIG_MACH_INGENIC=y
>>> +CONFIG_X1000_CU1000=y
>>> +CONFIG_HIGHMEM=y
>>> +CONFIG_HZ_100=y
>>> +CONFIG_HZ=100
>> 
>> This line looks malformed.
> 
> Ok, I'll remove it in v7.
> 
>> 
>>> +# CONFIG_SECCOMP is not set
>>> +# CONFIG_SUSPEND is not set
>>> +# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
>>> +# CONFIG_COMPACTION is not set
>>> +CONFIG_CMA=y
>>> +CONFIG_CMA_AREAS=7
>>> +CONFIG_UEVENT_HELPER=y
>>> +CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
>>> +CONFIG_DEVTMPFS=y
>>> +# CONFIG_FW_LOADER is not set
>>> +# CONFIG_ALLOW_DEV_COREDUMP is not set
>>> +# CONFIG_INPUT_MOUSEDEV is not set
>>> +# CONFIG_INPUT_KEYBOARD is not set
>>> +# CONFIG_INPUT_MOUSE is not set
>>> +# CONFIG_SERIO is not set
>>> +CONFIG_VT_HW_CONSOLE_BINDING=y
>>> +CONFIG_LEGACY_PTY_COUNT=2
>>> +CONFIG_SERIAL_EARLYCON=y
>>> +CONFIG_SERIAL_8250=y
>>> +CONFIG_SERIAL_8250_CONSOLE=y
>>> +CONFIG_SERIAL_8250_NR_UARTS=3
>>> +CONFIG_SERIAL_8250_RUNTIME_UARTS=3
>>> +CONFIG_SERIAL_8250_INGENIC=y
>>> +CONFIG_SERIAL_OF_PLATFORM=y
>>> +# CONFIG_HW_RANDOM is not set
>>> +CONFIG_GPIO_SYSFS=y
>>> +# CONFIG_HWMON is not set
>>> +# CONFIG_LCD_CLASS_DEVICE is not set
>>> +# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
>>> +# CONFIG_VGA_CONSOLE is not set
>>> +# CONFIG_HID is not set
>>> +# CONFIG_USB_SUPPORT is not set
>>> +# CONFIG_IOMMU_SUPPORT is not set
>>> +CONFIG_NVMEM=y
>>> +CONFIG_NVMEM_SYSFS=y
>>> +CONFIG_EXT4_FS=y
>>> +# CONFIG_DNOTIFY is not set
>>> +CONFIG_PROC_KCORE=y
>>> +# CONFIG_PROC_PAGE_MONITOR is not set
>>> +CONFIG_TMPFS=y
>>> +CONFIG_CONFIGFS_FS=y
>>> +CONFIG_NLS=y
>>> +CONFIG_NLS_CODEPAGE_936=y
>>> +CONFIG_NLS_CODEPAGE_950=y
>>> +CONFIG_NLS_ASCII=y
>>> +CONFIG_NLS_ISO8859_1=y
>>> +CONFIG_NLS_UTF8=y
>>> +CONFIG_CRYPTO_ECHAINIV=y
>>> +CONFIG_CRYPTO_AES=y
>>> +CONFIG_CRYPTO_DEFLATE=y
>>> +CONFIG_CRYPTO_LZO=y
>>> +CONFIG_PRINTK_TIME=y
>>> +CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
>>> +CONFIG_CONSOLE_LOGLEVEL_QUIET=15
>>> +CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
>>> +CONFIG_DEBUG_INFO=y
>>> +CONFIG_STRIP_ASM_SYMS=y
>>> +CONFIG_DEBUG_FS=y
>>> +CONFIG_MAGIC_SYSRQ=y
>>> +CONFIG_PANIC_ON_OOPS=y
>>> +CONFIG_PANIC_TIMEOUT=10
>>> +# CONFIG_SCHED_DEBUG is not set
>>> +# CONFIG_DEBUG_PREEMPT is not set
>>> +CONFIG_STACKTRACE=y
>>> +# CONFIG_FTRACE is not set
>>> +CONFIG_CMDLINE_BOOL=y
>>> +CONFIG_CMDLINE="console=ttyS2,115200n8 mem=32M@0x0 earlycon 
>>> \x7f\x7fclk_ignore_unused"
>> 
>> You already specify the stdout-path in the devicetree, no need to 
>> pass \x7fthe "console" parameter.
>> 
> 
> According the test log , if remove "console=ttyS2,115200n8", serial 
> will not
> initialized and will stuck after:
> 
> [    0.016815] printk: bootconsole [x1000_uart0] disabled
> 
> if remove both "console=ttyS2,115200n8" and "earlycon" it will stuck 
> after:
> 
> Starting kernel ...
> 
> So I think both the "earlycon" and the "console=ttyS2,115200n8 
> earlycon" should be retained.

There must be something wrong with your kernel config. It works here.

Use this as your stdout-path: "serial2:115200n8", unset 
CONFIG_CMDLINE_OVERRIDE, enable MIPS_CMDLINE_DTB_EXTEND, and just use 
"earlycon clk_ignore_unused" in the devicetree's bootargs. That should 
do it.

> 
>> For the "mem" parameter, it's already set in the devicetree, so no 
>> \x7fneed to set it again here.
>> Besides, in the devicetree it is set to 64 MiB.
> 
> Ok, I'll remove them in v7.
> 
>> 
>> Why is clk_ignore_unused needed?
> 
> In fact, I also don't know why "clk_ignore_unused" needed.
> This part of the parameter is copied from ci20_defconfig,
> but according to the test, if remove "clk_ignore_unused",
> it will stuck after :
> 
> [    0.374361] printk: bootconsole [x1000_uart0] disabled
> 
> Differeent from the case where "console=ttyS2,115200n8" is removed,
> the serial is successfully initialized this time.
> 
> So I think "clk_ignore_unused" should be retained.

It locks up because Linux disables a clock that is required for the 
system. This clock should be requested and enabled by a client driver. 
Could you investigate which clock is the problem?

@Paul Burton: do you remember why it was needed on CI20?

In the meantime I suppose "clk_ignore_unused" is fine.

Cheers,
-Paul

>> 
>>> +CONFIG_CMDLINE_OVERRIDE=y
>>> diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
>>> index 6b96844..ccaf507 100644
>>> --- a/arch/mips/jz4740/Kconfig
>>> +++ b/arch/mips/jz4740/Kconfig
>>> @@ -16,6 +16,10 @@ config JZ4780_CI20
>>>      bool "MIPS Creator CI20"
>>>      select MACH_JZ4780
>>> 
>>> +config X1000_CU1000
>>> +    bool "YSH & ATIL General Module CU1000"
>>> +    select MACH_X1000
>>> +
>>>  endchoice
>>> 
>>>  config MACH_JZ4740
>>> --
>>> 2.7.4
>>> 
>>> 
>> 
>> 
> 
> 
> 

Re: [PATCH v4 4/6] MIPS: Ingenic: Initial YSH & ATIL CU Neo board support.

[Zhou Yanjie]

Hi Paul,

On 2019年11月28日 20:31, Paul Cercueil wrote:
> Hi Zhou,
>
>
> Le jeu., nov. 28, 2019 at 13:11, Zhou Yanjie <zhouyanjie@zoho.com> a 
> écrit :
>> Hi Paul,
>>
>> On 2019年11月28日 00:57, Paul Cercueil wrote:
>>> Hi Zhou,
>>>
>>>
>>> Le mer., nov. 27, 2019 at 01:06, Zhou Yanjie <zhouyanjie@zoho.com> 
>>> a \x7fécrit :
>>>> Add a device tree for the Ingenic X1000 based YSH & ATIL CU Neo board.
>>>> Note that this is unselectable via Kconfig until the X1000 SoC is made
>>>> selectable in a later commit.
>>>>
>>>> Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
>>>> ---
>>>>
>>>> Notes:
>>>>     v1->v2:
>>>>     Rebase on top of mips-next, use TCU for system timer and 
>>>> \x7f\x7fclocksource.
>>>>
>>>>     v2->v3:
>>>>     No change.
>>>>
>>>>     v3->v4:
>>>>     1.Adjust "model" in "cu1000.dts" to match the description in 
>>>> \x7f\x7f"devices.yaml".
>>>>     2.Adjust "bool" in "Kconfig" to avoid duplicate names with 
>>>> \x7f\x7fsubsequent boards.
>>>>
>>>>  arch/mips/boot/dts/ingenic/Makefile   |   1 +
>>>>  arch/mips/boot/dts/ingenic/cu1000.dts |  52 ++++++++++++++++++
>>>>  arch/mips/configs/cu1000_defconfig    | 100 
>>>> \x7f\x7f++++++++++++++++++++++++++++++++++
>>>>  arch/mips/jz4740/Kconfig              |   4 ++
>>>>  4 files changed, 157 insertions(+)
>>>>  create mode 100644 arch/mips/boot/dts/ingenic/cu1000.dts
>>>>  create mode 100644 arch/mips/configs/cu1000_defconfig
>>>>
>>>> diff --git a/arch/mips/boot/dts/ingenic/Makefile 
>>>> \x7f\x7fb/arch/mips/boot/dts/ingenic/Makefile
>>>> index 9cc4844..f6db7bb 100644
>>>> --- a/arch/mips/boot/dts/ingenic/Makefile
>>>> +++ b/arch/mips/boot/dts/ingenic/Makefile
>>>> @@ -2,5 +2,6 @@
>>>>  dtb-$(CONFIG_JZ4740_QI_LB60)    += qi_lb60.dtb
>>>>  dtb-$(CONFIG_JZ4770_GCW0)    += gcw0.dtb
>>>>  dtb-$(CONFIG_JZ4780_CI20)    += ci20.dtb
>>>> +dtb-$(CONFIG_X1000_CU1000)    += cu1000.dtb
>>>>
>>>>  obj-$(CONFIG_BUILTIN_DTB)    += $(addsuffix .o, $(dtb-y))
>>>> diff --git a/arch/mips/boot/dts/ingenic/cu1000.dts 
>>>> \x7f\x7fb/arch/mips/boot/dts/ingenic/cu1000.dts
>>>> new file mode 100644
>>>> index 00000000..f92f6af
>>>> --- /dev/null
>>>> +++ b/arch/mips/boot/dts/ingenic/cu1000.dts
>>>> @@ -0,0 +1,52 @@
>>>> +// SPDX-License-Identifier: GPL-2.0
>>>> +/dts-v1/;
>>>> +
>>>> +#include "x1000.dtsi"
>>>> +#include <dt-bindings/gpio/gpio.h>
>>>> +#include <dt-bindings/clock/ingenic,tcu.h>
>>>> +
>>>> +/ {
>>>> +    compatible = "yna,cu1000", "ingenic,x1000";
>>>> +    model = "YSH & ATIL General Board CU Neo";
>>>> +
>>>> +    aliases {
>>>> +        serial2 = &uart2;
>>>> +    };
>>>> +
>>>> +    chosen {
>>>> +        stdout-path = &uart2;
>>>> +    };
>>>> +
>>>> +    memory {
>>>> +        device_type = "memory";
>>>> +        reg = <0x0 0x04000000>;
>>>> +    };
>>>> +};
>>>> +
>>>> +&exclk {
>>>> +    clock-frequency = <24000000>;
>>>> +};
>>>> +
>>>> +&tcu {
>>>> +    /* 1500 kHz for the system timer and clocksource */
>>>> +    assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER2>;
>>>> +    assigned-clock-rates = <1500000>, <1500000>;
>>>> +
>>>> +    /* Use channel #1 for the system timer channel #2 for the 
>>>> \x7f\x7fclocksource */
>>>> +    ingenic,pwm-channels-mask = <0xfa>;
>>>
>>> From the mask used, I'm gessing that you're reserving channels #0 
>>> and \x7f#2, not #1 and #2.
>>>
>>
>> My fault, you are right, it use channels #0 and #2.
>>
>>>> +};
>>>> +
>>>> +&uart2 {
>>>> +    status = "okay";
>>>> +
>>>> +    pinctrl-names = "default";
>>>> +    pinctrl-0 = <&pins_uart2>;
>>>> +};
>>>> +
>>>> +&pinctrl {
>>>> +    pins_uart2: uart2 {
>>>> +        function = "uart2";
>>>> +        groups = "uart2-data-d";
>>>> +        bias-disable;
>>>> +    };
>>>> +};
>>>> diff --git a/arch/mips/configs/cu1000_defconfig 
>>>> \x7f\x7fb/arch/mips/configs/cu1000_defconfig
>>>> new file mode 100644
>>>> index 00000000..88729ee
>>>> --- /dev/null
>>>> +++ b/arch/mips/configs/cu1000_defconfig
>>>> @@ -0,0 +1,100 @@
>>>> +CONFIG_LOCALVERSION_AUTO=y
>>>> +CONFIG_KERNEL_GZIP=y
>>>> +CONFIG_SYSVIPC=y
>>>> +CONFIG_NO_HZ_IDLE=y
>>>> +CONFIG_HIGH_RES_TIMERS=y
>>>> +CONFIG_PREEMPT=y
>>>> +CONFIG_IKCONFIG=y
>>>> +CONFIG_IKCONFIG_PROC=y
>>>> +CONFIG_LOG_BUF_SHIFT=14
>>>> +CONFIG_CGROUPS=y
>>>> +CONFIG_MEMCG=y
>>>> +CONFIG_MEMCG_KMEM=y
>>>> +CONFIG_CGROUP_SCHED=y
>>>> +CONFIG_CGROUP_FREEZER=y
>>>> +CONFIG_CGROUP_DEVICE=y
>>>> +CONFIG_CGROUP_CPUACCT=y
>>>> +CONFIG_NAMESPACES=y
>>>> +CONFIG_USER_NS=y
>>>> +CONFIG_BLK_DEV_INITRD=y
>>>> +CONFIG_INITRAMFS_SOURCE="arch/mips/boot/ramdisk.cpio.gz"
>>>> +CONFIG_CC_OPTIMIZE_FOR_SIZE=y
>>>> +CONFIG_SYSCTL_SYSCALL=y
>>>> +CONFIG_KALLSYMS_ALL=y
>>>> +CONFIG_EMBEDDED=y
>>>> +# CONFIG_VM_EVENT_COUNTERS is not set
>>>> +# CONFIG_COMPAT_BRK is not set
>>>> +CONFIG_SLAB=y
>>>> +CONFIG_MACH_INGENIC=y
>>>> +CONFIG_X1000_CU1000=y
>>>> +CONFIG_HIGHMEM=y
>>>> +CONFIG_HZ_100=y
>>>> +CONFIG_HZ=100
>>>
>>> This line looks malformed.
>>
>> Ok, I'll remove it in v7.
>>
>>>
>>>> +# CONFIG_SECCOMP is not set
>>>> +# CONFIG_SUSPEND is not set
>>>> +# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
>>>> +# CONFIG_COMPACTION is not set
>>>> +CONFIG_CMA=y
>>>> +CONFIG_CMA_AREAS=7
>>>> +CONFIG_UEVENT_HELPER=y
>>>> +CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
>>>> +CONFIG_DEVTMPFS=y
>>>> +# CONFIG_FW_LOADER is not set
>>>> +# CONFIG_ALLOW_DEV_COREDUMP is not set
>>>> +# CONFIG_INPUT_MOUSEDEV is not set
>>>> +# CONFIG_INPUT_KEYBOARD is not set
>>>> +# CONFIG_INPUT_MOUSE is not set
>>>> +# CONFIG_SERIO is not set
>>>> +CONFIG_VT_HW_CONSOLE_BINDING=y
>>>> +CONFIG_LEGACY_PTY_COUNT=2
>>>> +CONFIG_SERIAL_EARLYCON=y
>>>> +CONFIG_SERIAL_8250=y
>>>> +CONFIG_SERIAL_8250_CONSOLE=y
>>>> +CONFIG_SERIAL_8250_NR_UARTS=3
>>>> +CONFIG_SERIAL_8250_RUNTIME_UARTS=3
>>>> +CONFIG_SERIAL_8250_INGENIC=y
>>>> +CONFIG_SERIAL_OF_PLATFORM=y
>>>> +# CONFIG_HW_RANDOM is not set
>>>> +CONFIG_GPIO_SYSFS=y
>>>> +# CONFIG_HWMON is not set
>>>> +# CONFIG_LCD_CLASS_DEVICE is not set
>>>> +# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
>>>> +# CONFIG_VGA_CONSOLE is not set
>>>> +# CONFIG_HID is not set
>>>> +# CONFIG_USB_SUPPORT is not set
>>>> +# CONFIG_IOMMU_SUPPORT is not set
>>>> +CONFIG_NVMEM=y
>>>> +CONFIG_NVMEM_SYSFS=y
>>>> +CONFIG_EXT4_FS=y
>>>> +# CONFIG_DNOTIFY is not set
>>>> +CONFIG_PROC_KCORE=y
>>>> +# CONFIG_PROC_PAGE_MONITOR is not set
>>>> +CONFIG_TMPFS=y
>>>> +CONFIG_CONFIGFS_FS=y
>>>> +CONFIG_NLS=y
>>>> +CONFIG_NLS_CODEPAGE_936=y
>>>> +CONFIG_NLS_CODEPAGE_950=y
>>>> +CONFIG_NLS_ASCII=y
>>>> +CONFIG_NLS_ISO8859_1=y
>>>> +CONFIG_NLS_UTF8=y
>>>> +CONFIG_CRYPTO_ECHAINIV=y
>>>> +CONFIG_CRYPTO_AES=y
>>>> +CONFIG_CRYPTO_DEFLATE=y
>>>> +CONFIG_CRYPTO_LZO=y
>>>> +CONFIG_PRINTK_TIME=y
>>>> +CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
>>>> +CONFIG_CONSOLE_LOGLEVEL_QUIET=15
>>>> +CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
>>>> +CONFIG_DEBUG_INFO=y
>>>> +CONFIG_STRIP_ASM_SYMS=y
>>>> +CONFIG_DEBUG_FS=y
>>>> +CONFIG_MAGIC_SYSRQ=y
>>>> +CONFIG_PANIC_ON_OOPS=y
>>>> +CONFIG_PANIC_TIMEOUT=10
>>>> +# CONFIG_SCHED_DEBUG is not set
>>>> +# CONFIG_DEBUG_PREEMPT is not set
>>>> +CONFIG_STACKTRACE=y
>>>> +# CONFIG_FTRACE is not set
>>>> +CONFIG_CMDLINE_BOOL=y
>>>> +CONFIG_CMDLINE="console=ttyS2,115200n8 mem=32M@0x0 earlycon 
>>>> \x7f\x7fclk_ignore_unused"
>>>
>>> You already specify the stdout-path in the devicetree, no need to 
>>> pass \x7fthe "console" parameter.
>>>
>>
>> According the test log , if remove "console=ttyS2,115200n8", serial 
>> will not
>> initialized and will stuck after:
>>
>> [    0.016815] printk: bootconsole [x1000_uart0] disabled
>>
>> if remove both "console=ttyS2,115200n8" and "earlycon" it will stuck 
>> after:
>>
>> Starting kernel ...
>>
>> So I think both the "earlycon" and the "console=ttyS2,115200n8 
>> earlycon" should be retained.
>
> There must be something wrong with your kernel config. It works here.
>
> Use this as your stdout-path: "serial2:115200n8", unset 
> CONFIG_CMDLINE_OVERRIDE, enable MIPS_CMDLINE_DTB_EXTEND, and just use 
> "earlycon clk_ignore_unused" in the devicetree's bootargs. That should 
> do it.
>

It works, I will change it in v6.

>>
>>> For the "mem" parameter, it's already set in the devicetree, so no 
>>> \x7fneed to set it again here.
>>> Besides, in the devicetree it is set to 64 MiB.
>>
>> Ok, I'll remove them in v7.
>>
>>>
>>> Why is clk_ignore_unused needed?
>>
>> In fact, I also don't know why "clk_ignore_unused" needed.
>> This part of the parameter is copied from ci20_defconfig,
>> but according to the test, if remove "clk_ignore_unused",
>> it will stuck after :
>>
>> [    0.374361] printk: bootconsole [x1000_uart0] disabled
>>
>> Differeent from the case where "console=ttyS2,115200n8" is removed,
>> the serial is successfully initialized this time.
>>
>> So I think "clk_ignore_unused" should be retained.
>
> It locks up because Linux disables a clock that is required for the 
> system. This clock should be requested and enabled by a client driver. 
> Could you investigate which clock is the problem?
>

I also don't have any good ideas now, but I will try to investigate it.

Thanks and best regards!

> @Paul Burton: do you remember why it was needed on CI20?
>
> In the meantime I suppose "clk_ignore_unused" is fine.
>
> Cheers,
> -Paul
>
>>>
>>>> +CONFIG_CMDLINE_OVERRIDE=y
>>>> diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
>>>> index 6b96844..ccaf507 100644
>>>> --- a/arch/mips/jz4740/Kconfig
>>>> +++ b/arch/mips/jz4740/Kconfig
>>>> @@ -16,6 +16,10 @@ config JZ4780_CI20
>>>>      bool "MIPS Creator CI20"
>>>>      select MACH_JZ4780
>>>>
>>>> +config X1000_CU1000
>>>> +    bool "YSH & ATIL General Module CU1000"
>>>> +    select MACH_X1000
>>>> +
>>>>  endchoice
>>>>
>>>>  config MACH_JZ4740
>>>> -- 
>>>> 2.7.4
>>>>
>>>>
>>>
>>>
>>
>>
>>
>
>