linux-kernel - [PATCH 3/3] media: platform: meson-ao-cec-g12a: add wakeup support

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Date:   Thu, 12 Dec 2019 15:59:25 +0100
From:   Guillaume La Roque <glaroque@...libre.com>
To:     narmstrong@...libre.com, mchehab@...nel.org,
        hverkuil-cisco@...all.nl, khilman@...libre.com,
        devicetree@...r.kernel.org
Cc:     linux-media@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] media: platform: meson-ao-cec-g12a: add wakeup support

add register configuration to activate wakeup feature in bl301

Signed-off-by: Guillaume La Roque <glaroque@...libre.com>
---
 drivers/media/platform/meson/ao-cec-g12a.c | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/media/platform/meson/ao-cec-g12a.c b/drivers/media/platform/meson/ao-cec-g12a.c
index 3b39e875292e..d441b5a62b0c 100644
--- a/drivers/media/platform/meson/ao-cec-g12a.c
+++ b/drivers/media/platform/meson/ao-cec-g12a.c
@@ -25,6 +25,7 @@
 #include <media/cec.h>
 #include <media/cec-notifier.h>
 #include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
 
 /* CEC Registers */
 
@@ -168,6 +169,19 @@
 
 #define CECB_WAKEUPCTRL		0x31
 
+#define CECB_FUNC_CFG_REG		0xA0
+#define CECB_FUNC_CFG_MASK		GENMASK(6, 0)
+#define CECB_FUNC_CFG_CEC_ON		0x01
+#define CECB_FUNC_CFG_OTP_ON		0x02
+#define CECB_FUNC_CFG_AUTO_STANDBY	0x04
+#define CECB_FUNC_CFG_AUTO_POWER_ON	0x08
+#define CECB_FUNC_CFG_ALL		0x2f
+#define CECB_FUNC_CFG_NONE		0x0
+
+#define CECB_LOG_ADDR_REG	0xA4
+#define CECB_LOG_ADDR_MASK	GENMASK(22, 16)
+#define CECB_LOG_ADDR_SHIFT	16
+
 struct meson_ao_cec_g12a_data {
 	/* Setup the internal CECB_CTRL2 register */
 	bool				ctrl2_setup;
@@ -177,6 +191,7 @@ struct meson_ao_cec_g12a_device {
 	struct platform_device		*pdev;
 	struct regmap			*regmap;
 	struct regmap			*regmap_cec;
+	struct regmap			*regmap_ao_sysctrl;
 	spinlock_t			cec_reg_lock;
 	struct cec_notifier		*notify;
 	struct cec_adapter		*adap;
@@ -518,6 +533,12 @@ meson_ao_cec_g12a_set_log_addr(struct cec_adapter *adap, u8 logical_addr)
 					 BIT(logical_addr - 8));
 	}
 
+	if (ao_cec->regmap_ao_sysctrl)
+		ret |= regmap_update_bits(ao_cec->regmap_ao_sysctrl,
+					 CECB_LOG_ADDR_REG,
+					  CECB_FUNC_CFG_MASK,
+					  logical_addr << CECB_LOG_ADDR_SHIFT);
+
 	/* Always set Broadcast/Unregistered 15 address */
 	ret |= regmap_update_bits(ao_cec->regmap_cec, CECB_LADD_HIGH,
 				  BIT(CEC_LOG_ADDR_UNREGISTERED - 8),
@@ -618,6 +639,13 @@ static int meson_ao_cec_g12a_adap_enable(struct cec_adapter *adap, bool enable)
 		regmap_write(ao_cec->regmap_cec, CECB_CTRL2,
 			     FIELD_PREP(CECB_CTRL2_RISE_DEL_MAX, 2));
 
+	if (ao_cec->regmap_ao_sysctrl) {
+		regmap_update_bits(ao_cec->regmap_ao_sysctrl,
+				   CECB_FUNC_CFG_REG,
+				   CECB_FUNC_CFG_MASK,
+				   CECB_FUNC_CFG_ALL);
+	}
+
 	meson_ao_cec_g12a_irq_setup(ao_cec, true);
 
 	return 0;
@@ -692,6 +720,11 @@ static int meson_ao_cec_g12a_probe(struct platform_device *pdev)
 		goto out_probe_adapter;
 	}
 
+	ao_cec->regmap_ao_sysctrl = syscon_regmap_lookup_by_phandle
+		(pdev->dev.of_node, "amlogic,ao-sysctrl");
+	if (IS_ERR(ao_cec->regmap_ao_sysctrl))
+		dev_warn(&pdev->dev, "ao-sysctrl syscon regmap lookup failed.\n");
+
 	irq = platform_get_irq(pdev, 0);
 	ret = devm_request_threaded_irq(&pdev->dev, irq,
 					meson_ao_cec_g12a_irq,
-- 
2.17.1