Commit 6b197cb5 authored by Clément Péron's avatar Clément Péron Committed by Mauro Carvalho Chehab
Browse files

media: rc: Introduce sunxi_ir_quirks 



This driver is used in various Allwinner SoC with different configuration.

Introduce a quirks struct to know the fifo size and if a reset is required.

Signed-off-by: default avatarClément Péron <peron.clem@gmail.com>
Acked-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent 47fabc9c

drivers/media/rc/sunxi-cir.c

+47 −14
Original line number Diff line number Diff line
@@ -72,6 +72,17 @@ 
/* Time after which device stops sending data in ms */

#define SUNXI_IR_TIMEOUT      120



/**

 * struct sunxi_ir_quirks - Differences between SoC variants.

 *

 * @has_reset: SoC needs reset deasserted.

 * @fifo_size: size of the fifo.

 */

struct sunxi_ir_quirks {

	bool		has_reset;

	int		fifo_size;

};



struct sunxi_ir {

	spinlock_t      ir_lock;

	struct rc_dev   *rc;
@@ -134,6 +145,7 @@ static int sunxi_ir_probe(struct platform_device *pdev) 


	struct device *dev = &pdev->dev;

	struct device_node *dn = dev->of_node;

	const struct sunxi_ir_quirks *quirks;

	struct resource *res;

	struct sunxi_ir *ir;

	u32 b_clk_freq = SUNXI_IR_BASE_CLK;
@@ -142,12 +154,15 @@ static int sunxi_ir_probe(struct platform_device *pdev) 
	if (!ir)

		return -ENOMEM;



	quirks = of_device_get_match_data(&pdev->dev);

	if (!quirks) {

		dev_err(&pdev->dev, "Failed to determine the quirks to use\n");

		return -ENODEV;

	}



	spin_lock_init(&ir->ir_lock);



	if (of_device_is_compatible(dn, "allwinner,sun5i-a13-ir"))

		ir->fifo_size = 64;

	else

		ir->fifo_size = 16;

	ir->fifo_size = quirks->fifo_size;



	/* Clock */

	ir->apb_clk = devm_clk_get(dev, "apb");
@@ -164,13 +179,15 @@ static int sunxi_ir_probe(struct platform_device *pdev) 
	/* Base clock frequency (optional) */

	of_property_read_u32(dn, "clock-frequency", &b_clk_freq);



	/* Reset (optional) */

	ir->rst = devm_reset_control_get_optional_exclusive(dev, NULL);

	/* Reset */

	if (quirks->has_reset) {

		ir->rst = devm_reset_control_get_exclusive(dev, NULL);

		if (IS_ERR(ir->rst))

			return PTR_ERR(ir->rst);

		ret = reset_control_deassert(ir->rst);

		if (ret)

			return ret;

	}



	ret = clk_set_rate(ir->clk, b_clk_freq);

	if (ret) {
@@ -306,10 +323,26 @@ static int sunxi_ir_remove(struct platform_device *pdev) 
	return 0;

}



static const struct sunxi_ir_quirks sun4i_a10_ir_quirks = {

	.has_reset = false,

	.fifo_size = 16,

};



static const struct sunxi_ir_quirks sun5i_a13_ir_quirks = {

	.has_reset = false,

	.fifo_size = 64,

};



static const struct of_device_id sunxi_ir_match[] = {

	{ .compatible = "allwinner,sun4i-a10-ir", },

	{ .compatible = "allwinner,sun5i-a13-ir", },

	{},

	{

		.compatible = "allwinner,sun4i-a10-ir",

		.data = &sun4i_a10_ir_quirks,

	},

	{

		.compatible = "allwinner,sun5i-a13-ir",

		.data = &sun5i_a13_ir_quirks,

	},

	{}

};

MODULE_DEVICE_TABLE(of, sunxi_ir_match);