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NFC: trf7970a: Delay after initialization
author
Mark A. Greer
<mgreer@animalcreek.com>
Tue, 2 Sep 2014 22:12:38 +0000
(15:12 -0700)
committer
Samuel Ortiz
<sameo@linux.intel.com>
Sun, 7 Sep 2014 21:13:44 +0000
(23:13 +0200)
The trf7970a should be given at least 1 ms to
completely initialize after the 'Software Init'
and 'Idle' commands have been issued.
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
drivers/nfc/trf7970a.c
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diff --git
a/drivers/nfc/trf7970a.c
b/drivers/nfc/trf7970a.c
index
3859e02
..
b2d0fbf
100644
(file)
--- a/
drivers/nfc/trf7970a.c
+++ b/
drivers/nfc/trf7970a.c
@@
-824,6
+824,8
@@
static int trf7970a_init(struct trf7970a *trf)
if (ret)
goto err_out;
+ usleep_range(1000, 2000);
+
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL, 0);
if (ret)
goto err_out;