[PATCH v6 0/4] update clock handler and proper cpu features

[Sagar Shrikant Kadam]

U-Boot cmd "cpu detail" shows inconsistent CPU features. 
The current "cpu detail" sometimes shows "Microcode" as a feature, which
is not the case with FU540-C000 on HiFive Unleashed board.

Patch 1: add cpu node aliases. 
Patch 2: Init CPU information to avoid inconsistent cpu information.
Patch 3: Correctly parse and update mmu-type.
Patch 4: Set L1 Cache feature if either i-cache or d-cache is present 

I have picked few dependent patches from Sean's series from here [1]
and [2].

These have applied on mainline U-Boot commit eae62ae8de18 ("Merge tag
 'efi-2020-07-rc6' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi")

Patch history:
=============================================
V6:
-Rebase series with master
-Split patch 2 from v5 as suggested i.e init cpu feature in cpu-class.c
 as one patch and handle mmu-type check into another.
-Updated Reviewed-by tags

V5:
-Addressed review comments on v4.
1. Removed patch 1 which was for debug message.
2. Updated commit logs with proper information on number of cpu's
3. Additionally used d-cache to set the L1 feature bit.

V4:
1. Rebased the series to mainline commit.
2. Updated dependency list as few patches are now merged.
3. Added U-Boot log of the flow i.e fsbl + fw_payload.bin (Opensbi+U-Boot)
   
V3:
1. Included the cosmetic change as suggested
   s/L1 feature/L1 cache feature/
2. Added Reviewed-By tags

V2:
1. Incorporate review comments from Bin and Sean Anderson. 
   and dropped 2nd patch as similar work was already done in [1] and [2]
2  Add cpu node aliases to display cpu node's in sequence.
3. Add fix to show mmu as available cpu feature. 
4. Check and append L1 cache feature.

V1: Base version
    Thanks to Vincent Chen <vincent.chen at sifive.com> for testing the V1 
    version of this series.

[1] https://patchwork.ozlabs.org/patch/1316066
[2] https://patchwork.ozlabs.org/patch/1316067

All these together is available here:
https://github.com/sagsifive/u-boot/commits/dev/sagark/clk-v6

U-Boot log:
===========================================================
U-Boot SPL 2020.07-rc5-00063-g515541f (Jun 26 2020 - 04:44:08 -0700)
Trying to boot from MMC1


U-Boot 2020.07-rc5-00063-g515541f (Jun 26 2020 - 04:44:08 -0700)

CPU:   rv64imafdc
Model: SiFive HiFive Unleashed A00
DRAM:  8 GiB
MMC:   spi at 10050000:mmc at 0: 0
In:    serial at 10010000
Out:   serial at 10010000
Err:   serial at 10010000
Net:   eth0: ethernet at 10090000
Hit any key to stop autoboot:  0
=> cpu list
  1: cpu at 1      rv64imafdc
  2: cpu at 2      rv64imafdc
  3: cpu at 3      rv64imafdc
  4: cpu at 4      rv64imafdc
=> cpu detail
  1: cpu at 1      rv64imafdc
        ID = 1, freq = 999.100 MHz: L1 cache, MMU
  2: cpu at 2      rv64imafdc
        ID = 2, freq = 999.100 MHz: L1 cache, MMU
  3: cpu at 3      rv64imafdc
        ID = 3, freq = 999.100 MHz: L1 cache, MMU
  4: cpu at 4      rv64imafdc
        ID = 4, freq = 999.100 MHz: L1 cache, MMU



Sagar Shrikant Kadam (4):
  riscv: dts: hifive-unleashed-a00: add cpu aliases
  uclass: cpu: fix to display proper CPU features
  riscv: cpu: correctly handle the setting of CPU_FEAT_MMU bit
  riscv: cpu: check and append L1 cache to cpu features

 arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi |  4 ++++
 drivers/cpu/cpu-uclass.c                        |  3 +++
 drivers/cpu/riscv_cpu.c                         | 17 +++++++++++++----
 3 files changed, 20 insertions(+), 4 deletions(-)

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2.7.4