From: nicolas.ferre@atmel.com (Nicolas Ferre)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] ARM: dts: at91: sama5d4: change DMA allocation for secure peripherals
Date: Wed, 30 Nov 2016 18:36:29 +0100 [thread overview]
Message-ID: <20161130173630.11944-1-nicolas.ferre@atmel.com> (raw)
Some peripherals are "Programmable Secure" but left as "Secure" by default.
If tried to be connected to Non-Secure DMA controller, the possibility to
leak secure data is prevented so using these peripherals with DMA1 is not
possible with this default configuration (MATRIX_SPSELR registers setup by
bootloader).
Move them to DMA0 which is an "Always-Secure" DMA controller.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
---
arch/arm/boot/dts/sama5d4.dtsi | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/arm/boot/dts/sama5d4.dtsi b/arch/arm/boot/dts/sama5d4.dtsi
index 4f60c1b7b137..d3889c9d25a9 100644
--- a/arch/arm/boot/dts/sama5d4.dtsi
+++ b/arch/arm/boot/dts/sama5d4.dtsi
@@ -854,10 +854,10 @@
compatible = "atmel,at91sam9260-usart";
reg = <0xf8004000 0x100>;
interrupts = <27 IRQ_TYPE_LEVEL_HIGH 5>;
- dmas = <&dma1
+ dmas = <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(22))>,
- <&dma1
+ <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(23))>;
dma-names = "tx", "rx";
@@ -938,10 +938,10 @@
compatible = "atmel,sama5d4-i2c";
reg = <0xf8018000 0x4000>;
interrupts = <33 IRQ_TYPE_LEVEL_HIGH 6>;
- dmas = <&dma1
+ dmas = <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(4))>,
- <&dma1
+ <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(5))>;
dma-names = "tx", "rx";
@@ -1055,10 +1055,10 @@
compatible = "atmel,at91sam9260-usart";
reg = <0xfc004000 0x100>;
interrupts = <28 IRQ_TYPE_LEVEL_HIGH 5>;
- dmas = <&dma1
+ dmas = <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(24))>,
- <&dma1
+ <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(25))>;
dma-names = "tx", "rx";
@@ -1167,10 +1167,10 @@
compatible = "atmel,at91rm9200-spi";
reg = <0xfc01c000 0x100>;
interrupts = <39 IRQ_TYPE_LEVEL_HIGH 3>;
- dmas = <&dma1
+ dmas = <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(14))>,
- <&dma1
+ <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(15))>;
dma-names = "tx", "rx";
--
2.9.0
next reply other threads:[~2016-11-30 17:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-30 17:36 Nicolas Ferre [this message]
2016-11-30 17:36 ` [PATCH 2/2] ARM: dts: at91: sama5d4 Xplained: enable UART1 node with DMA Nicolas Ferre
2016-12-07 8:57 ` [PATCH 1/2] ARM: dts: at91: sama5d4: change DMA allocation for secure peripherals Alexandre Belloni
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