Commit e17ca0ef authored by Mesih Kilinc's avatar Mesih Kilinc Committed by Vinod Koul
Browse files

dma-engine: sun4i: Add has_reset option to quirk 



Allwinner suniv F1C100s has a reset bit for DMA in CCU. Sun4i do not
has this bit but in order to support suniv we need to add it. So add
support for reset bit.

Signed-off-by: default avatarMesih Kilinc <mesihkilinc@gmail.com>
[ csokas.bence: Rebased and addressed comments ]
Signed-off-by: default avatarCsókás Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241122161128.2619172-3-csokas.bence@prolan.hu


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent a2186c2c

drivers/dma/sun4i-dma.c

+11 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <linux/of_dma.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/reset.h>

#include <linux/slab.h>

#include <linux/spinlock.h>
@@ -159,6 +160,7 @@ struct sun4i_dma_config { 
	u8 ddma_drq_sdram;



	u8 max_burst;

	bool has_reset;

};



struct sun4i_dma_pchan {
@@ -208,6 +210,7 @@ struct sun4i_dma_dev { 
	int				irq;

	spinlock_t			lock;

	const struct sun4i_dma_config *cfg;

	struct reset_control *rst;

};



static struct sun4i_dma_dev *to_sun4i_dma_dev(struct dma_device *dev)
@@ -1215,6 +1218,13 @@ static int sun4i_dma_probe(struct platform_device *pdev) 
		return PTR_ERR(priv->clk);

	}



	if (priv->cfg->has_reset) {

		priv->rst = devm_reset_control_get_exclusive_deasserted(&pdev->dev, NULL);

		if (IS_ERR(priv->rst))

			return dev_err_probe(&pdev->dev, PTR_ERR(priv->rst),

					     "Failed to get reset control\n");

	}



	platform_set_drvdata(pdev, priv);

	spin_lock_init(&priv->lock);
@@ -1355,6 +1365,7 @@ static struct sun4i_dma_config sun4i_a10_dma_cfg = { 
	.ddma_drq_sdram		= SUN4I_DDMA_DRQ_TYPE_SDRAM,



	.max_burst		= SUN4I_MAX_BURST,

	.has_reset		= false,

};



static const struct of_device_id sun4i_dma_match[] = {