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NFC: trf7970a: Don't de-assert EN2 unless it was asserted 

When the trf7970a part has the bug related to 'en2-rf-quirk',
the GPIO connected to the EN2 pin will not be asserted by the
driver when powering up so it shouldn't be de-asserted when
powering down.

Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Greer 2017-04-25 15:43:49 -07:00 committed by Samuel Ortiz
parent 581132b6ae
commit 67dec1928d
1 changed files with 4 additions and 2 deletions
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6
drivers/nfc/trf7970a.c
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@ -1940,8 +1940,10 @@ static int trf7970a_power_down(struct trf7970a *trf)
}
gpio_set_value(trf->en_gpio, 0);
if (gpio_is_valid(trf->en2_gpio))
gpio_set_value(trf->en2_gpio, 0);
if (!(trf->quirks & TRF7970A_QUIRK_EN2_MUST_STAY_LOW))
if (gpio_is_valid(trf->en2_gpio))
gpio_set_value(trf->en2_gpio, 0);
ret = regulator_disable(trf->regulator);
if (ret)