build/patch/kernel/archive/sunxi-6.5/patches.megous/input-cyttsp4-Restart-on-wakeup-wakeup-by-I2C-read-doesn-t-work.patch

From 2ec318eb1d97944e5e234503080a2545b4a47fc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Jirman?= <megi@xff.cz>
Date: Tue, 1 Oct 2019 02:21:43 +0200
Subject: [PATCH 071/464] input: cyttsp4: Restart on wakeup (wakeup by I2C read
 doesn't work)

Signed-off-by: Ondrej Jirman <megi@xff.cz>
---
 drivers/input/touchscreen/cyttsp4_core.c | 30 ++++++++++++++++--------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index e77883fe932e..70bc1d2d0619 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -27,7 +27,7 @@
 #define CY_CORE_SLEEP_REQUEST_EXCLUSIVE_TIMEOUT	5000
 #define CY_CORE_MODE_CHANGE_TIMEOUT		1000
 #define CY_CORE_RESET_AND_WAIT_TIMEOUT		500
-#define CY_CORE_WAKEUP_TIMEOUT			50
+#define CY_CORE_WAKEUP_TIMEOUT			250
 
 #define CY_CORE_STARTUP_RETRY_COUNT		3
 
@@ -138,13 +138,11 @@ static int cyttsp4_hw_reset(struct cyttsp4 *cd)
 		return cyttsp4_hw_soft_reset(cd);
 
 	gpiod_set_value_cansleep(cd->reset_gpio, 1);
-	msleep(20);
-
-	gpiod_set_value_cansleep(cd->reset_gpio, 0);
 	msleep(40);
 
-	gpiod_set_value_cansleep(cd->reset_gpio, 1);
+	gpiod_set_value_cansleep(cd->reset_gpio, 0);
 	msleep(20);
+
 	return 0;
 }
 
@@ -1524,12 +1522,14 @@ static int cyttsp4_core_sleep_(struct cyttsp4 *cd)
 	}
 	dev_vdbg(cd->dev, "%s: write DEEP SLEEP succeeded\n", __func__);
 
+	/*
 	rc = cyttsp4_set_power(cd, 0);
 	if (rc < 0) {
 		dev_err(cd->dev, "%s: HW Power down fails r=%d\n",
 				__func__, rc);
 		goto error;
 	}
+          */
 
 	/* Give time to FW to sleep */
 	msleep(50);
@@ -1747,6 +1747,7 @@ static int cyttsp4_core_wake_(struct cyttsp4 *cd)
 	u8 mode;
 	int t;
 
+#if 0
 	/* Already woken? */
 	mutex_lock(&cd->system_lock);
 	if (cd->sleep_state == SS_SLEEP_OFF) {
@@ -1764,7 +1765,8 @@ static int cyttsp4_core_wake_(struct cyttsp4 *cd)
 				__func__, rc);
 
 		/* Initiate a read transaction to wake up */
-		cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode);
+		rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode);
+		dev_err(dev, "Waking up by read rc=%d\n", rc);
 	} else
 		dev_vdbg(cd->dev, "%s: HW power up succeeds\n",
 			__func__);
@@ -1781,7 +1783,13 @@ static int cyttsp4_core_wake_(struct cyttsp4 *cd)
 		cyttsp4_queue_startup_(cd);
 		mutex_unlock(&cd->system_lock);
 	}
-
+#else
+	mutex_lock(&cd->system_lock);
+	cd->int_status &= ~CY_INT_AWAKE;
+	/* Try starting up */
+	cyttsp4_queue_startup_(cd);
+	mutex_unlock(&cd->system_lock);
+#endif
 	mutex_lock(&cd->system_lock);
 	cd->sleep_state = SS_SLEEP_OFF;
 	mutex_unlock(&cd->system_lock);
@@ -1991,6 +1999,7 @@ struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
 		return ERR_PTR(-ENOMEM);
 	}
 
+	cd->irq = irq;
 	cd->signals = cyttsp4_default_signals;
 	cd->n_signals = ARRAY_SIZE(cyttsp4_default_signals);
 
@@ -2004,7 +2013,8 @@ struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
 	cd->vdd_supply = devm_regulator_get(dev, "vdd");
 	if (IS_ERR(cd->vdd_supply)) {
 		rc = PTR_ERR(cd->vdd_supply);
-		dev_err(dev, "can't get vdd power (%d)\n", rc);
+		if (rc != -EPROBE_DEFER)
+			dev_err(dev, "can't get vdd power (%d)\n", rc);
 		return ERR_PTR(rc);
 	}
 
@@ -2018,14 +2028,14 @@ struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
 	if (IS_ERR(cd->reset_gpio)) {
 		rc = PTR_ERR(cd->reset_gpio);
 		dev_err(dev, "can't get reset gpio (%d)\n", rc);
-		return ERR_PTR(rc);
+		goto error_disable_vdd;
 	}
 
 	cd->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(cd->reset_gpio)) {
 		rc = PTR_ERR(cd->reset_gpio);
 		dev_err(dev, "can't get reset gpio (%d)\n", rc);
-		return ERR_PTR(rc);
+		goto error_disable_vdd;
 	}
 
 	cd->xfer_buf = devm_kzalloc(dev, xfer_buf_size, GFP_KERNEL);
-- 
2.34.1