[PATCH v3 1/7] NFC: trf7970a: Don't de-assert EN2 unless it was asserted
DORMANTno replies
From: Mark Greer <hidden>
Date: 2017-01-20 19:17:39
Subsystem:
nfc subsystem, the rest, ti trf7970a nfc driver · Maintainers:
David Heidelberg, Linus Torvalds, Mark Greer
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-luAo+O/VEmrlveNOaEYElw@public.gmane.org> --- drivers/nfc/trf7970a.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 26c9dbbccb0c..92f3cf3e012a 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c@@ -1914,7 +1914,9 @@ static int trf7970a_power_down(struct trf7970a *trf) } gpio_set_value(trf->en_gpio, 0); - gpio_set_value(trf->en2_gpio, 0); + + if (!(trf->quirks & TRF7970A_QUIRK_EN2_MUST_STAY_LOW)) + gpio_set_value(trf->en2_gpio, 0); ret = regulator_disable(trf->regulator); if (ret)
--
2.11.0
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