tree 931ef9bc3140598ac0e86e11464336f0104bfa3b
parent d2c68c0179325c876f92830b75af2c0ee07a27ac
author Bhargav Shah <bhargavshah1988@gmail.com> 1563337423 +0000
committer Jagan Teki <jagan@amarulasolutions.com> 1563450076 +0530

spi: Add SiFive SPI driver

This patch adds SiFive SPI driver. The driver is 100% DM driver
and it determines input clock using clk framework.

The SiFive SPI block is found on SiFive FU540 SOC and is used to
access flash and MMC devices on SiFive Unleashed board.

This driver implementation is inspired from the Linux SiFive SPI
driver available in Linux-5.2 or higher and SiFive FSBL sources.

Signed-off-by: Bhargav Shah <bhargavshah1988@gmail.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>