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power: supply: ip5xxx: Fix integer overflow in current_now calculation
When current is larger than ~2A, the multiplication in current_now
property overflows and the kernel reports invalid negative current
value. Change the numerator and denominator while preserving their
ratio to allow up to +-6A before the overflow.
Fixes: 75853406fa
("power: supply: Add a driver for Injoinic power bank ICs")
Signed-off-by: Ondrej Jirman <megi@xff.cz>
Reviewed-by: Samuel Holland <samuel@sholland.org>
[use 149197/200 instead of 261095/350 as suggested by Samuel]
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
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@ -352,7 +352,7 @@ static int ip5xxx_battery_get_property(struct power_supply *psy,
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ret = ip5xxx_battery_read_adc(ip5xxx, IP5XXX_BATIADC_DAT0,
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IP5XXX_BATIADC_DAT1, &raw);
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val->intval = DIV_ROUND_CLOSEST(raw * 745985, 1000);
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val->intval = DIV_ROUND_CLOSEST(raw * 149197, 200);
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return 0;
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
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