gpio: htc-egpio: read output value from cache
When the hardware is in output mode, reading the value from the hardware is not giving the correct value back. Instead read the value from the cache so we get the right value. Suggested-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -160,11 +160,15 @@ static int egpio_get(struct gpio_chip *chip, unsigned offset)
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bit = egpio_bit(ei, offset);
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reg = egpio->reg_start + egpio_pos(ei, offset);
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if (test_bit(offset, &egpio->is_out)) {
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return !!(egpio->cached_values & (1 << offset));
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} else {
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value = egpio_readw(ei, reg);
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pr_debug("readw(%p + %x) = %x\n",
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ei->base_addr, reg << ei->bus_shift, value);
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return !!(value & bit);
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}
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}
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static int egpio_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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