clk: sifive: restrict Kconfig scope for the FU540 PRCI driver

2019-05-21T18:34:45+00:00

Restrict Kconfig scope for SiFive clock and reset IP block drivers such that they won't appear on most configurations that are unlikely to support them. This is based on a suggestion from Pavel Machek . Ideally this should be dependent on CONFIG_ARCH_SIFIVE, but since that Kconfig directive does not yet exist, add dependencies on RISCV or COMPILE_TEST for now. Signed-off-by: Paul Walmsley Signed-off-by: Paul Walmsley Reported-by: Pavel Machek Cc: Michael Turquette Acked-by: Pavel Machek Signed-off-by: Stephen Boyd

clk: sifive: add a driver for the SiFive FU540 PRCI IP block

2019-05-03T16:20:56+00:00

Add driver code for the SiFive FU540 PRCI IP block. This IP block handles reset and clock control for the SiFive FU540 device and implements SoC-level clock tree controls and dividers. Based on code written by Wesley Terpstra : https://github.com/riscv/riscv-linux/commit/999529edf517ed75b56659d456d221b2ee56bb60 Boot and PLL rate change were tested on a SiFive HiFive Unleashed board. This version includes several changes requested by Stephen Boyd . Signed-off-by: Paul Walmsley Signed-off-by: Paul Walmsley Cc: Michael Turquette Cc: Stephen Boyd Cc: Albert Ou Cc: Wesley W. Terpstra Cc: Palmer Dabbelt Cc: Megan Wachs Cc: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-clk@vger.kernel.org [sboyd@kernel.org: Fix some const and ARRAY_SIZE() issues, make makefile only descend if CLK_SIFIVE=y] Signed-off-by: Stephen Boyd

talos-op-linux/drivers/clk/sifive/Kconfig, branch master

clk: sifive: restrict Kconfig scope for the FU540 PRCI driver

clk: sifive: add a driver for the SiFive FU540 PRCI IP block