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pinctrl: at91: fix sam9x5 debounce/deglitch functions 

Replace at91_mux_get_deglitch with at91_mux_pio3_get_deglitch when using
sam9x5 (pio3) IP.
at91_mux_get_deglitch only test the activation of the "Input Filter" which
may be overloaded by the activation of the "Input Filter Slow Clock" to use
the input filter as a debounce filter instead of a deglitch filter.

Fix at91_mux_pio3_get_debounce to test the activation of the Input Filter
before testing the activation of the debounce filter (Input Filter Slow
Clock depends on Input Filter).

Fix at91_mux_pio3_set_debounce function to avoid disabling the deglitch
filter ("Input Filter") when debounce filter is disabled.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Boris BREZILLON 2013-09-13 09:47:22 +02:00 committed by Linus Walleij
parent 77966ad7b6
commit c8dba02e7d
1 changed files with 13 additions and 5 deletions
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18
drivers/pinctrl/pinctrl-at91.c
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@ -417,6 +417,14 @@ static void at91_mux_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
__raw_writel(mask, pio + (is_on ? PIO_IFER : PIO_IFDR));
}
static bool at91_mux_pio3_get_deglitch(void __iomem *pio, unsigned pin)
{
if ((__raw_readl(pio + PIO_IFSR) >> pin) & 0x1)
return !((__raw_readl(pio + PIO_IFSCSR) >> pin) & 0x1);
return false;
}
static void at91_mux_pio3_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
{
if (is_on)
@ -428,7 +436,8 @@ static bool at91_mux_pio3_get_debounce(void __iomem *pio, unsigned pin, u32 *div
{
*div = __raw_readl(pio + PIO_SCDR);
return (__raw_readl(pio + PIO_IFSCSR) >> pin) & 0x1;
return ((__raw_readl(pio + PIO_IFSR) >> pin) & 0x1) &&
((__raw_readl(pio + PIO_IFSCSR) >> pin) & 0x1);
}
static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask,
@ -438,9 +447,8 @@ static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask,
__raw_writel(mask, pio + PIO_IFSCER);
__raw_writel(div & PIO_SCDR_DIV, pio + PIO_SCDR);
__raw_writel(mask, pio + PIO_IFER);
} else {
__raw_writel(mask, pio + PIO_IFDR);
}
} else
__raw_writel(mask, pio + PIO_IFSCDR);
}
static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin)
@ -478,7 +486,7 @@ static struct at91_pinctrl_mux_ops at91sam9x5_ops = {
.mux_B_periph = at91_mux_pio3_set_B_periph,
.mux_C_periph = at91_mux_pio3_set_C_periph,
.mux_D_periph = at91_mux_pio3_set_D_periph,
.get_deglitch = at91_mux_get_deglitch,
.get_deglitch = at91_mux_pio3_get_deglitch,
.set_deglitch = at91_mux_pio3_set_deglitch,
.get_debounce = at91_mux_pio3_get_debounce,
.set_debounce = at91_mux_pio3_set_debounce,