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media: rc: Introduce sunxi_ir_quirks

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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: Clément Péron <peron.clem@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Clément Péron 2019-06-07 20:10:49 -03:00 committed by Mauro Carvalho Chehab
parent 47fabc9cbc
commit 6b197cb5b4
1 changed files with 47 additions and 14 deletions
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61
drivers/media/rc/sunxi-cir.c
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@ -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);
if (IS_ERR(ir->rst))
return PTR_ERR(ir->rst);
ret = reset_control_deassert(ir->rst);
if (ret)
return ret;
/* 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);