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Subject[PATCH 5/8] power: supply: axp20x_battery: add support for AXP813
Date
The X-Powers AXP813 PMIC has got some slight differences from
AXP20X/AXP22X PMICs:
- the maximum voltage supplied by the PMIC is 4.35 instead of 4.36/4.24
for AXP20X/AXP22X,
- the constant charge current formula is different,

It also has a bit to tell whether the battery percentage returned by the
PMIC is valid.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
---
drivers/power/supply/axp20x_battery.c | 44 +++++++++++++++++++++++++++-
1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
index 7494f0f..cb30302 100644
--- a/drivers/power/supply/axp20x_battery.c
+++ b/drivers/power/supply/axp20x_battery.c
@@ -46,6 +46,8 @@
#define AXP20X_CHRG_CTRL1_TGT_4_2V (2 << 5)
#define AXP20X_CHRG_CTRL1_TGT_4_36V (3 << 5)

+#define AXP813_CHRG_CTRL1_TGT_4_35V (3 << 5)
+
#define AXP22X_CHRG_CTRL1_TGT_4_22V (1 << 5)
#define AXP22X_CHRG_CTRL1_TGT_4_24V (3 << 5)

@@ -123,10 +125,41 @@ static int axp22x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt,
return 0;
}

+static int axp813_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt,
+ int *val)
+{
+ int ret, reg;
+
+ ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, &reg);
+ if (ret)
+ return ret;
+
+ switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) {
+ case AXP20X_CHRG_CTRL1_TGT_4_1V:
+ *val = 4100000;
+ break;
+ case AXP20X_CHRG_CTRL1_TGT_4_15V:
+ *val = 4150000;
+ break;
+ case AXP20X_CHRG_CTRL1_TGT_4_2V:
+ *val = 4200000;
+ break;
+ case AXP813_CHRG_CTRL1_TGT_4_35V:
+ *val = 4350000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static void raw_to_constant_charge_current(struct axp20x_batt_ps *axp, int *val)
{
if (axp->axp_id == AXP209_ID)
*val = *val * 100000 + 300000;
+ else if (axp->axp_id == AXP813_ID)
+ *val = *val * 200000 + 200000;
else
*val = *val * 150000 + 300000;
}
@@ -135,6 +168,8 @@ static void constant_charge_current_to_raw(struct axp20x_batt_ps *axp, int *val)
{
if (axp->axp_id == AXP209_ID)
*val = (*val - 300000) / 100000;
+ else if (axp->axp_id == AXP813_ID)
+ *val = (*val - 200000) / 200000;
else
*val = (*val - 300000) / 150000;
}
@@ -269,7 +304,8 @@ static int axp20x_battery_get_prop(struct power_supply *psy,
if (ret)
return ret;

- if (axp20x_batt->axp_id == AXP221_ID &&
+ if ((axp20x_batt->axp_id == AXP221_ID ||
+ axp20x_batt->axp_id == AXP813_ID) &&
!(reg & AXP22X_FG_VALID))
return -EINVAL;

@@ -284,6 +320,9 @@ static int axp20x_battery_get_prop(struct power_supply *psy,
if (axp20x_batt->axp_id == AXP209_ID)
return axp20x_battery_get_max_voltage(axp20x_batt,
&val->intval);
+ else if (axp20x_batt->axp_id == AXP813_ID)
+ return axp813_battery_get_max_voltage(axp20x_batt,
+ &val->intval);
return axp22x_battery_get_max_voltage(axp20x_batt,
&val->intval);

@@ -467,6 +506,9 @@ static const struct of_device_id axp20x_battery_ps_id[] = {
}, {
.compatible = "x-powers,axp221-battery-power-supply",
.data = (void *)AXP221_ID,
+ }, {
+ .compatible = "x-powers,axp813-battery-power-supply",
+ .data = (void *)AXP813_ID,
}, { /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, axp20x_battery_ps_id);
--
git-series 0.9.1
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