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[U-Boot,v3,42/66] rockchip: clk: rk3368: define DMA1_SRST_REQ and DMA2_SRST_REQ

Message ID 1501269764-13969-43-git-send-email-philipp.tomsich@theobroma-systems.com
State Superseded
Delegated to: Philipp Tomsich
Headers show

Commit Message

Philipp Tomsich July 28, 2017, 7:22 p.m. UTC 
On he RK3368, we need to temporarily disable security on the DMA
engines during TPL and SPL to allow the MMC host to DMA into DRAM.  To
do so, we need to reset the two DMA engines, which in turn requires
the DMA1_SRST_REQ and DMA2_SRST_REQ constants to refer to the
appropriate bits in the CRU.

As the ATF correctly initialises security (and only leaves EL3 after
doing so), this can not pose a security issue.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

Reviewed-by: Simon Glass <sjg@chromium.org>
---

Changes in v3: None
Changes in v2: None

 arch/arm/include/asm/arch-rockchip/cru_rk3368.h | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox

Patch

diff --git a/arch/arm/include/asm/arch-rockchip/cru_rk3368.h b/arch/arm/include/asm/arch-rockchip/cru_rk3368.h
index 24a9cc0..bf09e2f 100644
--- a/arch/arm/include/asm/arch-rockchip/cru_rk3368.h
+++ b/arch/arm/include/asm/arch-rockchip/cru_rk3368.h
@@ -102,6 +102,10 @@  enum {
 	/* SOFTRST1_CON */
 	MCU_PO_SRST_MASK		= BIT(13),
 	MCU_SYS_SRST_MASK		= BIT(12),
+	DMA1_SRST_REQ                   = BIT(2),
+
+	/* SOFTRST4_CON */
+	DMA2_SRST_REQ                   = BIT(0),
 
 	/* GLB_RST_CON */
 	PMU_GLB_SRST_CTRL_SHIFT		= 2,