linux-kernel - [PATCH 06/14] dmaengine: dma-jz4780: Add support for the JZ4725B SoC

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Date:   Tue,  3 Jul 2018 14:32:06 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>
Cc:     Mathieu Malaterre <malat@...ian.org>,
        Daniel Silsby <dansilsby@...il.com>, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...ux-mips.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 06/14] dmaengine: dma-jz4780: Add support for the JZ4725B SoC

The JZ4725B has one DMA core starring six DMA channels.
As for the JZ4770, each DMA channel's clock can be enabled with
a register write, the difference here being that once started, it
is not possible to turn it off.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 Documentation/devicetree/bindings/dma/jz4780-dma.txt | 1 +
 drivers/dma/dma-jz4780.c                             | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/jz4780-dma.txt b/Documentation/devicetree/bindings/dma/jz4780-dma.txt
index d7ca3f925fdf..5d302b488e88 100644
--- a/Documentation/devicetree/bindings/dma/jz4780-dma.txt
+++ b/Documentation/devicetree/bindings/dma/jz4780-dma.txt
@@ -5,6 +5,7 @@ Required properties:
 - compatible: Should be one of:
   * ingenic,jz4780-dma
   * ingenic,jz4770-dma
+  * ingenic,jz4725b-dma
   * ingenic,jz4740-dma
 - reg: Should contain the DMA channel registers location and length, followed
   by the DMA controller registers location and length.
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index ccadbe61dde7..922e4031e70e 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -134,6 +134,7 @@ struct jz4780_dma_chan {
 
 enum jz_version {
 	ID_JZ4740,
+	ID_JZ4725B,
 	ID_JZ4770,
 	ID_JZ4780,
 };
@@ -204,6 +205,8 @@ static inline void jz4780_dma_chan_enable(struct jz4780_dma_dev *jzdma,
 {
 	if (jzdma->version == ID_JZ4770)
 		jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DCKES, BIT(chn));
+	else if (jzdma->version == ID_JZ4725B)
+		jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DCKE, BIT(chn));
 }
 
 static inline void jz4780_dma_chan_disable(struct jz4780_dma_dev *jzdma,
@@ -249,6 +252,7 @@ static void jz4780_dma_desc_free(struct virt_dma_desc *vdesc)
 
 static const unsigned int jz4780_dma_ord_max[] = {
 	[ID_JZ4740] = 5,
+	[ID_JZ4725B] = 5,
 	[ID_JZ4770] = 6,
 	[ID_JZ4780] = 7,
 };
@@ -804,12 +808,14 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
 
 static const unsigned int jz4780_dma_nb_channels[] = {
 	[ID_JZ4740] = 6,
+	[ID_JZ4725B] = 6,
 	[ID_JZ4770] = 6,
 	[ID_JZ4780] = 32,
 };
 
 static const struct of_device_id jz4780_dma_dt_match[] = {
 	{ .compatible = "ingenic,jz4740-dma", .data = (void *)ID_JZ4740 },
+	{ .compatible = "ingenic,jz4725b-dma", .data = (void *)ID_JZ4725B },
 	{ .compatible = "ingenic,jz4770-dma", .data = (void *)ID_JZ4770 },
 	{ .compatible = "ingenic,jz4780-dma", .data = (void *)ID_JZ4780 },
 	{},
-- 
2.18.0