linux-kernel - [RFC 08/11] media: platform: meson-ao-cec-g12a: add support for SM1

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Date:   Mon,  1 Jul 2019 12:47:02 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     jbrunet@...libre.com, khilman@...libre.com,
        linux-media@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>
Subject: [RFC 08/11] media: platform: meson-ao-cec-g12a: add support for SM1

Add support for the Amlogic SM1 SoC Family to the G12A AO-CECB
derivative.

It only adds a single init register.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/media/platform/meson/ao-cec-g12a.c | 37 +++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/meson/ao-cec-g12a.c b/drivers/media/platform/meson/ao-cec-g12a.c
index 3620a1e310f5..1c696a126ee8 100644
--- a/drivers/media/platform/meson/ao-cec-g12a.c
+++ b/drivers/media/platform/meson/ao-cec-g12a.c
@@ -121,6 +121,9 @@
 #define CECB_CTRL_TYPE_NEXT	2
 
 #define CECB_CTRL2		0x01
+
+#define CECB_CTRL2_RISE_DEL_MAX	GENMASK(4, 0)
+
 #define CECB_INTR_MASK		0x02
 #define CECB_LADD_LOW		0x05
 #define CECB_LADD_HIGH		0x06
@@ -165,6 +168,11 @@
 
 #define CECB_WAKEUPCTRL		0x31
 
+struct meson_ao_cec_g12a_data {
+	/* Setup the internal CECB_CTRL2 register */
+	bool				ctrl2_setup;
+};
+
 struct meson_ao_cec_g12a_device {
 	struct platform_device		*pdev;
 	struct regmap			*regmap;
@@ -175,6 +183,7 @@ struct meson_ao_cec_g12a_device {
 	struct cec_msg			rx_msg;
 	struct clk			*oscin;
 	struct clk			*core;
+	const struct meson_ao_cec_g12a_data *data;
 };
 
 static const struct regmap_config meson_ao_cec_g12a_regmap_conf = {
@@ -620,6 +629,10 @@ static int meson_ao_cec_g12a_adap_enable(struct cec_adapter *adap, bool enable)
 	regmap_update_bits(ao_cec->regmap, CECB_GEN_CNTL_REG,
 			   CECB_GEN_CNTL_RESET, 0);
 
+	if (ao_cec->data->ctrl2_setup)
+		regmap_write(ao_cec->regmap_cec, CECB_CTRL2,
+			     FIELD_PREP(CECB_CTRL2_RISE_DEL_MAX, 2));
+
 	meson_ao_cec_g12a_irq_setup(ao_cec, true);
 
 	return 0;
@@ -639,6 +652,7 @@ static int meson_ao_cec_g12a_probe(struct platform_device *pdev)
 	void __iomem *base;
 	int ret, irq;
 
+
 	hdmi_dev = cec_notifier_parse_hdmi_phandle(&pdev->dev);
 	if (IS_ERR(hdmi_dev))
 		return PTR_ERR(hdmi_dev);
@@ -647,6 +661,12 @@ static int meson_ao_cec_g12a_probe(struct platform_device *pdev)
 	if (!ao_cec)
 		return -ENOMEM;
 
+	ao_cec->data = of_device_get_match_data(&pdev->dev);
+	if (!ao_cec->data) {
+		dev_err(&pdev->dev, "failed to get match data\n");
+		return -ENODEV;
+	}
+
 	spin_lock_init(&ao_cec->cec_reg_lock);
 	ao_cec->pdev = pdev;
 
@@ -757,8 +777,23 @@ static int meson_ao_cec_g12a_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct meson_ao_cec_g12a_data ao_cec_g12a_data = {
+	.ctrl2_setup = false,
+};
+
+static const struct meson_ao_cec_g12a_data ao_cec_sm1_data = {
+	.ctrl2_setup = true,
+};
+
 static const struct of_device_id meson_ao_cec_g12a_of_match[] = {
-	{ .compatible = "amlogic,meson-g12a-ao-cec", },
+	{
+		.compatible = "amlogic,meson-g12a-ao-cec",
+		.data = &ao_cec_g12a_data,
+	},
+	{
+		.compatible = "amlogic,meson-sm1-ao-cec",
+		.data = &ao_cec_sm1_data,
+	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, meson_ao_cec_g12a_of_match);
-- 
2.21.0