[U-Boot] [PATCH 0/4] Update SiFive Unleashed Clock Driver

Anup Patel Anup.Patel at wdc.com
Tue Jun 18 09:18:09 UTC 2019

This series update SiFive Unleashed clock driver so that:
1. It is in sync with upstream Linux driver
2. It uses latest DT bindings as-per upstream Linux driver

With this series, we can now use latest DT bindings with U-Boot. I have
tested SiFive Serial driver and Cadence MACB ethernet driver with this
changes and both work fine.

The legacy FSBL will still pass DTB to U-Boot with older DT bindings
which will break the updated SiFive Unleashed clock driver. To tackle
this, we have embedded DTB in OpenSBI FW_PAYLOAD firmware for SiFive
Unleashed so that OpenSBI will override and pass updated DTB to U-Boot.

In fact, the updated DTB passed by OpenSBI can be used by latest Linux
(i.e. V5.2-rc1 or higher) as well.

The OpenSBI changes to embed SiFive Unleashed DTB can be found in
sifive_unleashed_dtb_fix_v1 branch of:

This series can be found in riscv_unleashed_clk_sync_v1 branch of:

Anup Patel (4):
  clk: sifive: Factor-out PLL library as separate module
  clk: sifive: Sync-up WRPLL library with upstream Linux
  clk: sifive: Sync-up DT bindings header with upstream Linux
  clk: sifive: Sync-up main driver with upstream Linux

 drivers/clk/Kconfig                           |   1 +
 drivers/clk/Makefile                          |   1 +
 drivers/clk/analogbits/Kconfig                |   4 +
 drivers/clk/analogbits/Makefile               |   3 +
 .../{sifive => analogbits}/wrpll-cln28hpc.c   | 168 ++++++++----------
 drivers/clk/sifive/Kconfig                    |   3 -
 drivers/clk/sifive/Makefile                   |   2 -
 drivers/clk/sifive/fu540-prci.c               | 123 +++++++------
 include/dt-bindings/clk/sifive-fu540-prci.h   |  29 ---
 include/dt-bindings/clock/sifive-fu540-prci.h |  18 ++
 .../linux/clk}/analogbits-wrpll-cln28hpc.h    |  70 +++-----
 11 files changed, 195 insertions(+), 227 deletions(-)
 create mode 100644 drivers/clk/analogbits/Kconfig
 create mode 100644 drivers/clk/analogbits/Makefile
 rename drivers/clk/{sifive => analogbits}/wrpll-cln28hpc.c (69%)
 delete mode 100644 include/dt-bindings/clk/sifive-fu540-prci.h
 create mode 100644 include/dt-bindings/clock/sifive-fu540-prci.h
 rename {drivers/clk/sifive => include/linux/clk}/analogbits-wrpll-cln28hpc.h (52%)


More information about the U-Boot mailing list