releases/4.19.85/power-supply-twl4030_charger-disable-eoc-interrupt-o.patch

From 6b5bbc490de961b9749a68b1a8b56a2bf9fbdea6 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Mon, 17 Sep 2018 07:00:07 +0200
Subject: power: supply: twl4030_charger: disable eoc interrupt on linear
 charge

From: Andreas Kemnade <andreas@kemnade.info>

[ Upstream commit 079cdff3d0a09c5da10ae1be35def7a116776328 ]

This avoids getting woken up from suspend after power interruptions
when the bci wrongly thinks the battery is full just because
of input current going low because of low input power

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/power/supply/twl4030_charger.c | 27 +++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
index adcaa0a10a6f4..0e202d4273fb6 100644
--- a/drivers/power/supply/twl4030_charger.c
+++ b/drivers/power/supply/twl4030_charger.c
@@ -440,6 +440,7 @@ static void twl4030_current_worker(struct work_struct *data)
 static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
 {
 	int ret;
+	u32 reg;
 
 	if (bci->usb_mode == CHARGE_OFF)
 		enable = false;
@@ -453,14 +454,38 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
 			bci->usb_enabled = 1;
 		}
 
-		if (bci->usb_mode == CHARGE_AUTO)
+		if (bci->usb_mode == CHARGE_AUTO) {
+			/* Enable interrupts now. */
+			reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC |
+					TWL4030_TBATOR2 | TWL4030_TBATOR1 |
+					TWL4030_BATSTS);
+			ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
+				       TWL4030_INTERRUPTS_BCIIMR1A);
+			if (ret < 0) {
+				dev_err(bci->dev,
+					"failed to unmask interrupts: %d\n",
+					ret);
+				return ret;
+			}
 			/* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
 			ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
+		}
 
 		/* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
 		ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0,
 			TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
 		if (bci->usb_mode == CHARGE_LINEAR) {
+			/* Enable interrupts now. */
+			reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_TBATOR2 |
+					TWL4030_TBATOR1 | TWL4030_BATSTS);
+			ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
+				       TWL4030_INTERRUPTS_BCIIMR1A);
+			if (ret < 0) {
+				dev_err(bci->dev,
+					"failed to unmask interrupts: %d\n",
+					ret);
+				return ret;
+			}
 			twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC|TWL4030_CVENAC, 0);
 			/* Watch dog key: WOVF acknowledge */
 			ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x33,
-- 
2.20.1