[v10,22/23] riscv: Update Canaan Kendryte K210 defconfig

Update the Kendryte k210 nommu default configuration file
(nommu_k210_defconfig) to include device drivers for reset, reboot,
I2C, SPI, gpio and LEDs support. Virtual Terminal support is also
disabled as no terminal devices are supported and enabled. Disabling
CONFIG_VT (removing the no longer needed override for
CONFIG_VGA_CONSOLE) reduces the kernel image size by about 65 KB.

This default configuration remains suitable for a system using an
initramfs cpio file linked into the kernel image.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
---
 arch/riscv/configs/nommu_k210_defconfig | 37 +++++++++++++++++++++----
 1 file changed, 32 insertions(+), 5 deletions(-)

On Sun, Dec 13, 2020 at 7:22 PM Damien Le Moal <damien.lemoal@wdc.com> wrote:
>
> Update the Kendryte k210 nommu default configuration file
> (nommu_k210_defconfig) to include device drivers for reset, reboot,
> I2C, SPI, gpio and LEDs support. Virtual Terminal support is also
> disabled as no terminal devices are supported and enabled. Disabling
> CONFIG_VT (removing the no longer needed override for
> CONFIG_VGA_CONSOLE) reduces the kernel image size by about 65 KB.
>
> This default configuration remains suitable for a system using an
> initramfs cpio file linked into the kernel image.
>
> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
> ---
>  arch/riscv/configs/nommu_k210_defconfig | 37 +++++++++++++++++++++----
>  1 file changed, 32 insertions(+), 5 deletions(-)
>
> diff --git a/arch/riscv/configs/nommu_k210_defconfig b/arch/riscv/configs/nommu_k210_defconfig
> index 368a28cf1467..a099c29b4b14 100644
> --- a/arch/riscv/configs/nommu_k210_defconfig
> +++ b/arch/riscv/configs/nommu_k210_defconfig
> @@ -1,17 +1,19 @@
>  # CONFIG_CPU_ISOLATION is not set
> -CONFIG_LOG_BUF_SHIFT=15
> +CONFIG_LOG_BUF_SHIFT=13
>  CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=12
>  CONFIG_BLK_DEV_INITRD=y
> -CONFIG_INITRAMFS_FORCE=y
> +# CONFIG_RD_GZIP is not set
>  # CONFIG_RD_BZIP2 is not set
>  # CONFIG_RD_LZMA is not set
>  # CONFIG_RD_XZ is not set
>  # CONFIG_RD_LZO is not set
>  # CONFIG_RD_LZ4 is not set
> +# CONFIG_RD_ZSTD is not set
>  CONFIG_CC_OPTIMIZE_FOR_SIZE=y
>  # CONFIG_SYSFS_SYSCALL is not set
>  # CONFIG_FHANDLE is not set
>  # CONFIG_BASE_FULL is not set
> +# CONFIG_FUTEX is not set
>  # CONFIG_EPOLL is not set
>  # CONFIG_SIGNALFD is not set
>  # CONFIG_TIMERFD is not set
> @@ -25,15 +27,16 @@ CONFIG_EMBEDDED=y
>  # CONFIG_VM_EVENT_COUNTERS is not set
>  # CONFIG_COMPAT_BRK is not set
>  CONFIG_SLOB=y
> -# CONFIG_SLAB_MERGE_DEFAULT is not set
>  # CONFIG_MMU is not set
>  CONFIG_SOC_CANAAN=y
> +CONFIG_SOC_CANAAN_K210_DTB_SOURCE="k210_generic"
>  CONFIG_MAXPHYSMEM_2GB=y
>  CONFIG_SMP=y
>  CONFIG_NR_CPUS=2
>  CONFIG_CMDLINE="earlycon console=ttySIF0"
>  CONFIG_CMDLINE_FORCE=y
> -CONFIG_JUMP_LABEL=y
> +# CONFIG_SECCOMP is not set
> +# CONFIG_STACKPROTECTOR is not set
>  # CONFIG_BLOCK is not set
>  CONFIG_BINFMT_FLAT=y
>  # CONFIG_COREDUMP is not set
> @@ -41,23 +44,47 @@ CONFIG_DEVTMPFS=y
>  CONFIG_DEVTMPFS_MOUNT=y
>  # CONFIG_FW_LOADER is not set
>  # CONFIG_ALLOW_DEV_COREDUMP is not set
> +# CONFIG_INPUT_LEDS is not set
>  # CONFIG_INPUT_KEYBOARD is not set
>  # CONFIG_INPUT_MOUSE is not set
>  # CONFIG_SERIO is not set
> +# CONFIG_VT is not set
> +# CONFIG_UNIX98_PTYS is not set
>  # CONFIG_LEGACY_PTYS is not set
>  # CONFIG_LDISC_AUTOLOAD is not set
>  # CONFIG_HW_RANDOM is not set
>  # CONFIG_DEVMEM is not set
> +CONFIG_I2C=y
> +CONFIG_I2C_CHARDEV=y
> +# CONFIG_I2C_HELPER_AUTO is not set
> +CONFIG_I2C_DESIGNWARE_PLATFORM=y
> +CONFIG_SPI=y
> +# CONFIG_SPI_MEM is not set
> +CONFIG_SPI_DESIGNWARE=y
> +CONFIG_SPI_DW_MMIO=y
> +# CONFIG_GPIO_SYSFS is not set
> +# CONFIG_GPIO_CDEV_V1 is not set
> +CONFIG_GPIO_DWAPB=y
> +CONFIG_GPIO_SIFIVE=y
> +CONFIG_POWER_RESET=y
> +CONFIG_POWER_RESET_SYSCON=y
>  # CONFIG_HWMON is not set
> -# CONFIG_VGA_CONSOLE is not set
>  # CONFIG_HID is not set
>  # CONFIG_USB_SUPPORT is not set
> +CONFIG_NEW_LEDS=y
> +CONFIG_LEDS_CLASS=y
> +CONFIG_LEDS_GPIO=y
> +CONFIG_LEDS_USER=y
>  # CONFIG_VIRTIO_MENU is not set
> +# CONFIG_VHOST_MENU is not set
> +# CONFIG_FILE_LOCKING is not set
>  # CONFIG_DNOTIFY is not set
>  # CONFIG_INOTIFY_USER is not set
>  # CONFIG_MISC_FILESYSTEMS is not set
>  CONFIG_LSM="[]"
>  CONFIG_PRINTK_TIME=y
> +# CONFIG_SYMBOLIC_ERRNAME is not set
> +# CONFIG_DEBUG_BUGVERBOSE is not set
>  # CONFIG_DEBUG_MISC is not set
>  CONFIG_PANIC_ON_OOPS=y
>  # CONFIG_SCHED_DEBUG is not set
> --
> 2.29.2
>
>
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Looks good to me.

Reviewed-by: Anup Patel <anup@brainfault.org>

Regards,
Anup