[U-Boot] [PATCH v2 1/2] rockchip: dwmmc: add handling for u-boot, spl-fifo-mode

[Heiko Stuebner <heiko@sntech.de>]

From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

Rockchips dwmmc controllers can't do dma to non-ddr addresses,
like for example the soc-internal sram but during boot parts of
TrustedFirmware need to be placed there from the read FIT image.

So add handling for a u-boot,spl-fifo-mode to not put the mmc
controllers into fifo mode for all time.

The regular fifo-mode property still takes precedent and only
if not set do we check for the spl-specific property.

Suggested-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
---
 drivers/mmc/rockchip_dw_mmc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/rockchip_dw_mmc.c b/drivers/mmc/rockchip_dw_mmc.c
index b2a1201631..a0e1be8794 100644
--- a/drivers/mmc/rockchip_dw_mmc.c
+++ b/drivers/mmc/rockchip_dw_mmc.c
@@ -72,6 +72,11 @@ static int rockchip_dwmmc_ofdata_to_platdata(struct udevice *dev)
 		return -EINVAL;
 	priv->fifo_mode = dev_read_bool(dev, "fifo-mode");
 
+#ifdef CONFIG_SPL_BUILD
+	if (!priv->fifo_mode)
+		priv->fifo_mode = dev_read_bool(dev, "u-boot,spl-fifo-mode");
+#endif
+
 	/*
 	 * 'clock-freq-min-max' is deprecated
 	 * (see https://github.com/torvalds/linux/commit/b023030f10573de738bbe8df63d43acab64c9f7b)
-- 
2.24.0