linux-kernel - [PATCH v4 2/2] dmaengine: JZ4780: Add support for the JZ4755.

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Message-Id: <20221019063934.3278444-3-lis8215@gmail.com>
Date:   Wed, 19 Oct 2022 09:39:34 +0300
From:   Siarhei Volkau <lis8215@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Siarhei Volkau <lis8215@...il.com>,
        Paul Cercueil <paul@...pouillou.net>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org
Subject: [PATCH v4 2/2] dmaengine: JZ4780: Add support for the JZ4755.

The JZ4755 has 4 DMA channels per DMA unit, two idential DMA units.

The JZ4755 has the similar DMA engine to JZ4725b and it has the
same bug as JZ4725b, see commit a40c94be2336.
At least the JZ_SOC_DATA_BREAK_LINKS flag make it work much better,
although not ideal.

Reviewed-by: Paul Cercueil <paul@...pouillou.net>
Tested-by: Siarhei Volkau <lis8215@...il.com>
Signed-off-by: Siarhei Volkau <lis8215@...il.com>
---
 drivers/dma/dma-jz4780.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 2a483802d..9c1a6e9a9 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -1038,6 +1038,13 @@ static const struct jz4780_dma_soc_data jz4725b_dma_soc_data = {
 		 JZ_SOC_DATA_BREAK_LINKS,
 };
 
+static const struct jz4780_dma_soc_data jz4755_dma_soc_data = {
+	.nb_channels = 4,
+	.transfer_ord_max = 5,
+	.flags = JZ_SOC_DATA_PER_CHAN_PM | JZ_SOC_DATA_NO_DCKES_DCKEC |
+		 JZ_SOC_DATA_BREAK_LINKS,
+};
+
 static const struct jz4780_dma_soc_data jz4760_dma_soc_data = {
 	.nb_channels = 5,
 	.transfer_ord_max = 6,
@@ -1101,6 +1108,7 @@ static const struct jz4780_dma_soc_data x1830_dma_soc_data = {
 static const struct of_device_id jz4780_dma_dt_match[] = {
 	{ .compatible = "ingenic,jz4740-dma", .data = &jz4740_dma_soc_data },
 	{ .compatible = "ingenic,jz4725b-dma", .data = &jz4725b_dma_soc_data },
+	{ .compatible = "ingenic,jz4755-dma", .data = &jz4755_dma_soc_data },
 	{ .compatible = "ingenic,jz4760-dma", .data = &jz4760_dma_soc_data },
 	{ .compatible = "ingenic,jz4760-mdma", .data = &jz4760_mdma_soc_data },
 	{ .compatible = "ingenic,jz4760-bdma", .data = &jz4760_bdma_soc_data },
-- 
2.36.1