189 lines
4.9 KiB
Diff
189 lines
4.9 KiB
Diff
From f85a5b2a259a9c6e544074d4a1fe42c81d97a9cb Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megous@megous.com>
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Date: Tue, 14 Nov 2017 02:09:43 +0100
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Subject: [PATCH 237/351] power: supply: axp20x-usb-power: Support input
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current limit
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Allow to set input current limit directly when autodetection fails
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on incorrectly wired tablets, like TBS A711, that don't have
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D+/D- pins connected, and can't detect the usb power supply type.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/power/supply/axp20x_usb_power.c | 104 +++++++++++++++++++++++-
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include/linux/mfd/axp20x.h | 1 +
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2 files changed, 104 insertions(+), 1 deletion(-)
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diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c
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index 0eaa86c52874..14d8081b364e 100644
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--- a/drivers/power/supply/axp20x_usb_power.c
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+++ b/drivers/power/supply/axp20x_usb_power.c
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@@ -51,6 +51,8 @@
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#define AXP20X_ADC_EN1_VBUS_VOLT BIT(3)
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#define AXP20X_VBUS_MON_VBUS_VALID BIT(3)
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+#define AXP813_CHRG_CTRL3_VBUS_CUR_LIMIT_MASK GENMASK(7, 4)
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+#define AXP813_CHRG_CTRL3_VBUS_CUR_LIMIT_OFFSET 4
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#define AXP813_BC_EN BIT(0)
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@@ -174,6 +176,50 @@ static int axp813_get_current_max(struct axp20x_usb_power *power, int *val)
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return 0;
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}
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+static int
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+axp813_usb_power_get_input_current_limit(struct axp20x_usb_power *power,
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+ int *intval)
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+{
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+ unsigned int v;
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+ int ret = regmap_read(power->regmap, AXP813_CHRG_CTRL3, &v);
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+
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+ if (ret)
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+ return ret;
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+
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+ v &= AXP813_CHRG_CTRL3_VBUS_CUR_LIMIT_MASK;
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+ v >>= AXP813_CHRG_CTRL3_VBUS_CUR_LIMIT_OFFSET;
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+
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+ switch (v) {
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+ case 0:
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+ *intval = 100000;
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+ return 0;
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+ case 1:
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+ *intval = 500000;
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+ return 0;
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+ case 2:
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+ *intval = 900000;
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+ return 0;
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+ case 3:
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+ *intval = 1500000;
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+ return 0;
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+ case 4:
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+ *intval = 2000000;
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+ return 0;
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+ case 5:
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+ *intval = 2500000;
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+ return 0;
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+ case 6:
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+ *intval = 3000000;
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+ return 0;
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+ case 7:
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+ *intval = 3500000;
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+ return 0;
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+ default:
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+ *intval = 4000000;
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+ return 0;
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+ }
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+}
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+
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static int axp20x_usb_power_get_property(struct power_supply *psy,
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enum power_supply_property psp, union power_supply_propval *val)
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{
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@@ -272,6 +318,11 @@ static int axp20x_usb_power_get_property(struct power_supply *psy,
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_USED);
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break;
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+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
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+ if (power->axp20x_id == AXP813_ID)
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+ return axp813_usb_power_get_input_current_limit(power,
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+ &val->intval);
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+ /* fallthrough */
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default:
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return -EINVAL;
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}
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@@ -315,6 +366,50 @@ static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
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return -EINVAL;
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}
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+static int
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+axp813_usb_power_set_input_current_limit(struct axp20x_usb_power *power,
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+ int intval)
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+{
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+ unsigned int reg;
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+
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+ switch (intval) {
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+ case 100000:
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+ reg = 0;
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+ break;
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+ case 500000:
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+ reg = 1;
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+ break;
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+ case 900000:
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+ reg = 2;
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+ break;
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+ case 1500000:
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+ reg = 3;
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+ break;
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+ case 2000000:
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+ reg = 4;
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+ break;
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+ case 2500000:
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+ reg = 5;
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+ break;
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+ case 3000000:
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+ reg = 6;
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+ break;
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+ case 3500000:
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+ reg = 7;
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+ break;
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+ case 4000000:
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+ reg = 8;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ return regmap_update_bits(power->regmap,
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+ AXP813_CHRG_CTRL3,
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+ AXP813_CHRG_CTRL3_VBUS_CUR_LIMIT_MASK,
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+ reg << AXP813_CHRG_CTRL3_VBUS_CUR_LIMIT_OFFSET);
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+}
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+
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static int axp813_usb_power_set_current_max(struct axp20x_usb_power *power,
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int intval)
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{
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@@ -384,6 +479,11 @@ static int axp20x_usb_power_set_property(struct power_supply *psy,
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val->intval);
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return axp20x_usb_power_set_current_max(power, val->intval);
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+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
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+ if (power->axp20x_id == AXP813_ID)
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+ return axp813_usb_power_set_input_current_limit(power,
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+ val->intval);
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+ /* fallthrough */
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default:
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return -EINVAL;
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}
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@@ -407,7 +507,8 @@ static int axp20x_usb_power_prop_writeable(struct power_supply *psy,
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return power->axp20x_id == AXP813_ID;
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return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
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- psp == POWER_SUPPLY_PROP_CURRENT_MAX;
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+ psp == POWER_SUPPLY_PROP_CURRENT_MAX ||
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+ psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
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}
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static enum power_supply_property axp20x_usb_power_properties[] = {
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@@ -426,6 +527,7 @@ static enum power_supply_property axp22x_usb_power_properties[] = {
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_MIN,
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POWER_SUPPLY_PROP_CURRENT_MAX,
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+ POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
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};
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static const struct power_supply_desc axp20x_usb_power_desc = {
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diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
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index fd5957c042da..00967b50f33f 100644
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--- a/include/linux/mfd/axp20x.h
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+++ b/include/linux/mfd/axp20x.h
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@@ -130,6 +130,7 @@ enum axp20x_variants {
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/* Other DCDC regulator control registers are the same as AXP803 */
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#define AXP813_DCDC7_V_OUT 0x26
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+#define AXP813_CHRG_CTRL3 0x35
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/* Interrupt */
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#define AXP152_IRQ1_EN 0x40
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--
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2.34.0
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