[U-Boot] [PATCH 2/2] mmc: tmio: Limit DMA to 32bit on R-Car Gen3

[Marek Vasut]

The internal DMAC on Gen3 is 32bit only, limit the DMA address
range to 32bit.

Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Masahiro Yamada <yamada.masahiro at socionext.com>
---
 drivers/mmc/tmio-common.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c
index 6b21941991..138de59470 100644
--- a/drivers/mmc/tmio-common.c
+++ b/drivers/mmc/tmio-common.c
@@ -379,6 +379,12 @@ static bool tmio_sd_addr_is_dmaable(const char *src)
 	if (!IS_ALIGNED(addr, TMIO_SD_DMA_MINALIGN))
 		return false;
 
+#if defined(CONFIG_RCAR_GEN3)
+	/* Gen3 DMA has 32bit limit */
+	if (addr >> 32)
+		return false;
+#endif
+
 #if defined(CONFIG_ARCH_UNIPHIER) && !defined(CONFIG_ARM64) && \
 	defined(CONFIG_SPL_BUILD)
 	/*
-- 
2.18.0