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gpio: mxc: read output value from GPIO_DR register

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All supported iMX GPIO controllers store configured GPIO output value
in GPIO_DR data register, which is represented by GPIO generic reg_set.
Provide a BGPIOF_READ_OUTPUT_REG_SET flag to bgpio_init() to allow
correct getting of previously set output value.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Vladimir Zapolskiy 2015-04-29 18:35:01 +03:00 committed by Linus Walleij
parent f30663398e
commit 442b2494b1
1 changed files with 2 additions and 1 deletions
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3
drivers/gpio/gpio-mxc.c
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@ -450,7 +450,8 @@ static int mxc_gpio_probe(struct platform_device *pdev)
err = bgpio_init(&port->bgc, &pdev->dev, 4,
port->base + GPIO_PSR,
port->base + GPIO_DR, NULL,
port->base + GPIO_GDIR, NULL, 0);
port->base + GPIO_GDIR, NULL,
BGPIOF_READ_OUTPUT_REG_SET);
if (err)
goto out_bgio;