The FU540-C000 support in U-Boot is missing DM based reset driver, and is handling reset's to sub-system within the prci driver itself. The series here adds a generic DM reset driver for SiFive SoC's so as to leverage the U-Boot's reset framework and binds the reset driver with prci driver. The PRCI driver takes care of triggering the consumers reset signals appropriately.
Patch 1: Add necessary dt indexes for device reset register. Patch 2: Update macro's to use common dt indexes from binding header. Patch 3: Add reset producer and consumer entries within the device tree. Patch 4: Add reset dm driver and bind it within prci module. Patch 5: Add Kconfig, Makefile entries and enable the driver
This series is based on mainline U-Boot commit 922c6d5d0090 ("Merge tag 'mmc-2020-6-24' of https://gitlab.denx.de/u-boot/custodians/u-boot-mmc")
History: ========================== V2: -Removed extra character in commit log of 2nd patch
V1: -Base version.
Sagar Shrikant Kadam (5): dt-bindings: prci: add indexes for reset signals available in prci fu540: prci: use common reset indexes defined in binding header fu540: dtsi: add reset producer and consumer entries sifive: reset: add DM based reset driver for SiFive SoC's configs: reset: fu540: enable dm reset framework for SiFive SoC
arch/riscv/dts/fu540-c000-u-boot.dtsi | 10 +++ arch/riscv/include/asm/arch-fu540/reset.h | 13 +++ configs/sifive_fu540_defconfig | 2 + drivers/clk/sifive/fu540-prci.c | 89 +++++++++++++------ drivers/reset/Kconfig | 9 ++ drivers/reset/Makefile | 1 + drivers/reset/reset-sifive.c | 118 ++++++++++++++++++++++++++ include/dt-bindings/clock/sifive-fu540-prci.h | 8 ++ 8 files changed, 225 insertions(+), 25 deletions(-) create mode 100644 arch/riscv/include/asm/arch-fu540/reset.h create mode 100644 drivers/reset/reset-sifive.c