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authorClément Péron <peron.clem@gmail.com>2019-06-08 02:10:49 +0300
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-08-04 12:35:06 +0300
commit6b197cb5b4dc7be463599daeb28dfb8d24674746 (patch)
treefb5350e4fdc39e846f4ae880e2e3afee7815681e /drivers/media/rc/sunxi-cir.c
parent47fabc9cbc05bd5ebc70e1953d118d2a424df841 (diff)
downloadlinux-6b197cb5b4dc7be463599daeb28dfb8d24674746.tar.xz
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: 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>
Diffstat (limited to 'drivers/media/rc/sunxi-cir.c')
-rw-r--r--drivers/media/rc/sunxi-cir.c61
1 files changed, 47 insertions, 14 deletions
diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
index aa719d0ae6b0..29fe152fd9bc 100644
--- a/drivers/media/rc/sunxi-cir.c
+++ b/drivers/media/rc/sunxi-cir.c
@@ -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);