diff options
Diffstat (limited to 'arch/arm/mach-tegra/pinmux.c')
| -rw-r--r-- | arch/arm/mach-tegra/pinmux.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/pinmux.c b/arch/arm/mach-tegra/pinmux.c index d94e348412f3..b58541009a77 100644 --- a/arch/arm/mach-tegra/pinmux.c +++ b/arch/arm/mach-tegra/pinmux.c @@ -227,6 +227,28 @@ static int tegra_pinmux_set_func(const struct tegra_pingroup_config *config) return 0; } +int tegra_pinmux_get_func(enum tegra_pingroup pg) +{ + int mux = -1; + unsigned long reg; + unsigned long flags; + + if (pg < 0 || pg >= TEGRA_MAX_PINGROUP) + return -ERANGE; + + if (pingroups[pg].mux_reg < 0) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(pingroups[pg].mux_reg); + mux = (reg >> pingroups[pg].mux_bit) & 0x3; + + spin_unlock_irqrestore(&mux_lock, flags); + + return mux; +} + int tegra_pinmux_set_tristate(enum tegra_pingroup pg, enum tegra_tristate tristate) { |