bq27000: report missing device better.
One an hdq buss, a missing device reads as 0xff, not -1. So do a translation to allow detecting of a missing bus. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Sebastian Reichel <sre@kernel.org>
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@ -416,6 +416,9 @@ static void bq27x00_update(struct bq27x00_device_info *di)
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bool is_bq27425 = di->chip == BQ27425;
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cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500);
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if ((cache.flags & 0xff) == 0xff)
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/* read error */
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cache.flags = -1;
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if (cache.flags >= 0) {
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if (!is_bq27500 && !is_bq27425
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&& (cache.flags & BQ27000_FLAG_CI)) {
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