power: supply: twl4030_charger: disable eoc interrupt on linear charge

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>

1 files changed, 26 insertions, 1 deletions

diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
index c629c1642531..80582c8f98fa 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,