From 7a4a207e74d6aeb63a38e9a3f0cfc40223d5c40e Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Mon, 5 Jul 2010 13:39:16 +0000 Subject: 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 Signed-off-by: Mike Frysinger --- arch/blackfin/kernel/setup.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/blackfin/kernel/setup.c') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index d37a397f43f5..ac71dc15cbdb 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(); -- cgit v1.2.3