power: supply: ab8500: Drop AB8540/9540 support

The AB8540 was an evolved version of the AB8500, but it was never
mass produced or put into products, only reference designs exist.
The upstream support was never completed and it is unlikely that
this will happen so drop the support for now to simplify
maintenance of the AB8500.

Cc: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

1 files changed, 0 insertions, 62 deletions

diff --git a/drivers/power/supply/abx500_chargalg.c b/drivers/power/supply/abx500_chargalg.c
index a4411d6bbc96..947709cdd14e 100644
--- a/drivers/power/supply/abx500_chargalg.c
+++ b/drivers/power/supply/abx500_chargalg.c
@@ -44,9 +44,6 @@
 /* Five minutes expressed in seconds */
 #define FIVE_MINUTES_IN_SECONDS        300
 
-/* Plus margin for the low battery threshold */
-#define BAT_PLUS_MARGIN                (100)
-
 #define CHARGALG_CURR_STEP_LOW		0
 #define CHARGALG_CURR_STEP_HIGH	100
 
@@ -101,7 +98,6 @@ enum abx500_chargalg_states {
 	STATE_HW_TEMP_PROTECT_INIT,
 	STATE_HW_TEMP_PROTECT,
 	STATE_NORMAL_INIT,
-	STATE_USB_PP_PRE_CHARGE,
 	STATE_NORMAL,
 	STATE_WAIT_FOR_RECHARGE_INIT,
 	STATE_WAIT_FOR_RECHARGE,
@@ -133,7 +129,6 @@ static const char *states[] = {
 	"HW_TEMP_PROTECT_INIT",
 	"HW_TEMP_PROTECT",
 	"NORMAL_INIT",
-	"USB_PP_PRE_CHARGE",
 	"NORMAL",
 	"WAIT_FOR_RECHARGE_INIT",
 	"WAIT_FOR_RECHARGE",
@@ -603,37 +598,6 @@ static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable,
 	return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset);
 }
 
- /**
- * ab8540_chargalg_usb_pp_en() - Enable/ disable USB power path
- * @di:                pointer to the abx500_chargalg structure
- * @enable:    power path enable/disable
- *
- * The USB power path will be enable/ disable
- */
-static int ab8540_chargalg_usb_pp_en(struct abx500_chargalg *di, bool enable)
-{
-	if (!di->usb_chg || !di->usb_chg->ops.pp_enable)
-		return -ENXIO;
-
-	return di->usb_chg->ops.pp_enable(di->usb_chg, enable);
-}
-
-/**
- * ab8540_chargalg_usb_pre_chg_en() - Enable/ disable USB pre-charge
- * @di:                pointer to the abx500_chargalg structure
- * @enable:    USB pre-charge enable/disable
- *
- * The USB USB pre-charge will be enable/ disable
- */
-static int ab8540_chargalg_usb_pre_chg_en(struct abx500_chargalg *di,
-					  bool enable)
-{
-	if (!di->usb_chg || !di->usb_chg->ops.pre_chg_enable)
-		return -ENXIO;
-
-	return di->usb_chg->ops.pre_chg_enable(di->usb_chg, enable);
-}
-
 /**
  * abx500_chargalg_update_chg_curr() - Update charger current
  * @di:		pointer to the abx500_chargalg structure
@@ -833,9 +797,6 @@ static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di)
 		di->batt_data.avg_curr > 0) {
 		if (++di->eoc_cnt >= EOC_COND_CNT) {
 			di->eoc_cnt = 0;
-			if ((di->chg_info.charger_type & USB_CHG) &&
-			   (di->usb_chg->power_path))
-				ab8540_chargalg_usb_pp_en(di, true);
 			di->charge_status = POWER_SUPPLY_STATUS_FULL;
 			di->maintenance_chg = true;
 			dev_dbg(di->dev, "EOC reached!\n");
@@ -1536,22 +1497,6 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 		break;
 
 	case STATE_NORMAL_INIT:
-		if ((di->chg_info.charger_type & USB_CHG) &&
-				di->usb_chg->power_path) {
-			if (di->batt_data.volt >
-			    (di->bm->fg_params->lowbat_threshold +
-			     BAT_PLUS_MARGIN)) {
-				ab8540_chargalg_usb_pre_chg_en(di, false);
-				ab8540_chargalg_usb_pp_en(di, false);
-			} else {
-				ab8540_chargalg_usb_pp_en(di, true);
-				ab8540_chargalg_usb_pre_chg_en(di, true);
-				abx500_chargalg_state_to(di,
-					STATE_USB_PP_PRE_CHARGE);
-				break;
-			}
-		}
-
 		if (di->curr_status.curr_step == CHARGALG_CURR_STEP_LOW)
 			abx500_chargalg_stop_charging(di);
 		else {
@@ -1575,13 +1520,6 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 
 		break;
 
-	case STATE_USB_PP_PRE_CHARGE:
-		if (di->batt_data.volt >
-			(di->bm->fg_params->lowbat_threshold +
-			BAT_PLUS_MARGIN))
-			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
-		break;
-
 	case STATE_NORMAL:
 		handle_maxim_chg_curr(di);
 		if (di->charge_status == POWER_SUPPLY_STATUS_FULL &&