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authorMichael Hennerich <michael.hennerich@analog.com>2010-07-05 13:39:16 +0000
committerMike Frysinger <vapier@gentoo.org>2010-08-06 12:55:52 -0400
commit7a4a207e74d6aeb63a38e9a3f0cfc40223d5c40e (patch)
tree21d440f3cf0e3dd2be9daedd345778073d78c2d0 /arch/blackfin/kernel
parent812ae98f0849fbceb32c6d21bcdda42b40264c82 (diff)
downloadlinux-2.6.38-lt-ux500-7a4a207e74d6aeb63a38e9a3f0cfc40223d5c40e.tar.gz
Blackfin: BF51x/BF52x: support GPIO Hysteresis/Schmitt Trigger options
Newer parts have optional Hysteresis/Schmitt Trigger options to help with dirty signals. So add some kconfig options for tuning this and enable it by default for people. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/setup.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index d37a397f43f..ac71dc15cbd 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -864,6 +864,13 @@ void __init setup_arch(char **cmdline_p)
bfin_write_EBIU_MODE(CONFIG_EBIU_MODEVAL);
bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTLVAL);
#endif
+#ifdef CONFIG_BFIN_HYSTERESIS_CONTROL
+ bfin_write_PORTF_HYSTERISIS(HYST_PORTF_0_15);
+ bfin_write_PORTG_HYSTERISIS(HYST_PORTG_0_15);
+ bfin_write_PORTH_HYSTERISIS(HYST_PORTH_0_15);
+ bfin_write_MISCPORT_HYSTERISIS((bfin_read_MISCPORT_HYSTERISIS() &
+ ~HYST_NONEGPIO_MASK) | HYST_NONEGPIO);
+#endif
cclk = get_cclk();
sclk = get_sclk();