This patch adds Device Tree support for the three DMA controller instances
on r8a7740 in a DMA multiplexer node.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+rene...@gmail.com>
---
arch/arm/boot/dts/r8a7740.dtsi | 62 ++++++++++++++++++++++++++++++++
arch/arm/mach-shmobile/setup-r8a7740.c | 12 ++++++
2 files changed, 74 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/dts/r8a7740.dtsi b/arch/arm/boot/dts/r8a7740.dtsi
index 25dc930..683751c 100644
--- a/arch/arm/boot/dts/r8a7740.dtsi
+++ b/arch/arm/boot/dts/r8a7740.dtsi
@@ -112,6 +112,68 @@
0 149 0x4>;
};
+ dmac: dma-mux0 {
+ compatible = "renesas,shdma-mux";
+ #dma-cells = <1>;
+ dma-channels = <6>;
+ dma-requests = <256>;
+ reg = <0 0>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ dma0: shdma@fe008020 {
+ compatible = "renesas,shdma";
+ reg = <0xfe008020 0x270>,
+ <0xfe009000 0xc>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 34 4
+ 0 28 4
+ 0 29 4
+ 0 30 4
+ 0 31 4
+ 0 32 4
+ 0 33 4>;
+ interrupt-names = "error",
+ "ch0", "ch1", "ch2", "ch3",
+ "ch4", "ch5";
+ };
+
+ dma1: shdma@fe018020 {
+ compatible = "renesas,shdma";
+ reg = <0xfe018020 0x270>,
+ <0xfe019000 0xc>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 41 4
+ 0 35 4
+ 0 36 4
+ 0 37 4
+ 0 38 4
+ 0 39 4
+ 0 40 4>;
+ interrupt-names = "error",
+ "ch0", "ch1", "ch2", "ch3",
+ "ch4", "ch5";
+ };
+
+ dma2: shdma@fe028020 {
+ compatible = "renesas,shdma";
+ reg = <0xfe028020 0x270>,
+ <0xfe029000 0xc>;
+ interrupt-parent = <&gic>;
+ interrupts = <0 48 4
+ 0 42 4
+ 0 43 4
+ 0 44 4
+ 0 45 4
+ 0 46 4
+ 0 47 4>;
+ interrupt-names = "error",
+ "ch0", "ch1", "ch2", "ch3",
+ "ch4", "ch5";
+ };
+ };
+
i2c0: i2c@fff20000 {
#address-cells = <1>;
#size-cells = <0>;
diff --git a/arch/arm/mach-shmobile/setup-r8a7740.c
b/arch/arm/mach-shmobile/setup-r8a7740.c
index 6b3ed42..de55161 100644
--- a/arch/arm/mach-shmobile/setup-r8a7740.c
+++ b/arch/arm/mach-shmobile/setup-r8a7740.c
@@ -996,7 +996,19 @@ void __init r8a7740_add_early_devices(void)
#ifdef CONFIG_USE_OF
+static struct of_dev_auxdata r8a7740_dmac_auxdata[] = {
+ OF_DEV_AUXDATA("renesas,shdma", 0xfe008020, "sh-dma-engine.0",
+ &dma_platform_data),
+ OF_DEV_AUXDATA("renesas,shdma", 0xfe018020, "sh-dma-engine.1",
+ &dma_platform_data),
+ OF_DEV_AUXDATA("renesas,shdma", 0xfe028020, "sh-dma-engine.2",
+ &dma_platform_data),
+ { }
+};
+
static const struct of_dev_auxdata r8a7740_auxdata_lookup[] __initconst = {
+ OF_DEV_AUXDATA("renesas,shdma-mux", 0, "shdma-of.0",
+ r8a7740_dmac_auxdata),
{ }
};
--
1.7.2.5
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