Re: [PATCH v14 16/16] riscv: Add Canaan Kendryte K210 SD card defconfig

[Atish Patra <atishp@atishpatra.org>]

On Tue, Feb 2, 2021 at 2:37 AM Damien Le Moal <damien.lemoal@wdc.com> wrote:
>
> The nommu_k210_defconfig default configuration allows booting a Canaan
> Kendryte K210 SoC based boards using an embedded intramfs cpio file.
> Modifying this configuration to enable support for the board SD card is
> not trivial for all users. To help beginners getting started with these
> boards, add the nommu_k210_sdcard_defconfig default configuration file
> to set all configuration options necessary to use the board mmc-spi sd
> card for the root file system.
>
> This new configuration adds support for the block layer, the mmc-spi
> driver and modifies the boot options to specify the rootfs device as
> mmcblk0p1 (first partition of the sd card block device). The ext2 file
> system is selected by default to encourage its use as that results in
> only about 4KB added to the kernel image size. As ext2 does not have
> journaling, the boot options specify a read-only mount of the file
> system. Similarly to the smaller nommu_k210_defconfig, this new default
> configuration disables virtual terminal support to reduce the kernel
> image size.
>
> The default device tree selected is unchanged, specifying the simple
> "k210_generic" device tree file. The user must change this setting to
> specify the device tree suitable for the board being used
> (sipeed_maix_bit, sipeed_maix_dock, sipeed_maix_go, sipeed_maixduino or
> canaan_kd233).
>
> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
> Reviewed-by: Anup Patel <anup@brainfault.org>
> ---
>  .../riscv/configs/nommu_k210_sdcard_defconfig | 92 +++++++++++++++++++
>  1 file changed, 92 insertions(+)
>  create mode 100644 arch/riscv/configs/nommu_k210_sdcard_defconfig
>
> diff --git a/arch/riscv/configs/nommu_k210_sdcard_defconfig b/arch/riscv/configs/nommu_k210_sdcard_defconfig
> new file mode 100644
> index 000000000000..61f887f65419
> --- /dev/null
> +++ b/arch/riscv/configs/nommu_k210_sdcard_defconfig
> @@ -0,0 +1,92 @@
> +# CONFIG_CPU_ISOLATION is not set
> +CONFIG_LOG_BUF_SHIFT=13
> +CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=12
> +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
> +# CONFIG_EVENTFD is not set
> +# CONFIG_AIO is not set
> +# CONFIG_IO_URING is not set
> +# CONFIG_ADVISE_SYSCALLS is not set
> +# CONFIG_MEMBARRIER is not set
> +# CONFIG_KALLSYMS is not set
> +CONFIG_EMBEDDED=y
> +# CONFIG_VM_EVENT_COUNTERS is not set
> +# CONFIG_COMPAT_BRK is not set
> +CONFIG_SLOB=y
> +# 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 rootdelay=2 root=/dev/mmcblk0p1 ro"
> +CONFIG_CMDLINE_FORCE=y
> +# CONFIG_SECCOMP is not set
> +# CONFIG_STACKPROTECTOR is not set
> +# CONFIG_GCC_PLUGINS is not set
> +# CONFIG_BLK_DEV_BSG is not set
> +# CONFIG_MQ_IOSCHED_DEADLINE is not set
> +# CONFIG_MQ_IOSCHED_KYBER is not set
> +CONFIG_BINFMT_FLAT=y
> +# CONFIG_COREDUMP is not set
> +CONFIG_DEVTMPFS=y
> +CONFIG_DEVTMPFS_MOUNT=y
> +# CONFIG_FW_LOADER is not set
> +# CONFIG_ALLOW_DEV_COREDUMP is not set
> +# CONFIG_BLK_DEV is not set
> +# CONFIG_INPUT is not set
> +# CONFIG_SERIO is not set
> +# CONFIG_VT 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_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_USB_SUPPORT is not set
> +CONFIG_MMC=y
> +# CONFIG_PWRSEQ_EMMC is not set
> +# CONFIG_PWRSEQ_SIMPLE is not set
> +CONFIG_MMC_SPI=y
> +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_SURFACE_PLATFORMS is not set
> +CONFIG_EXT2_FS=y
> +# 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_SECTION_MISMATCH_WARN_ONLY is not set
> +# CONFIG_FRAME_POINTER is not set
> +# CONFIG_DEBUG_MISC is not set
> +CONFIG_PANIC_ON_OOPS=y
> +# CONFIG_SCHED_DEBUG is not set
> +# CONFIG_RCU_TRACE is not set
> +# CONFIG_FTRACE is not set
> +# CONFIG_RUNTIME_TESTING_MENU is not set
> --
> 2.29.2
>
>
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Reviewed-by: Atish Patra <atish.patra@wdc.com>

--
Regards,
Atish

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