ARM: tegra: pinmux: support Tegra210's e_io_hv pin option
Tegra210 has a per-pin option named e_io_hv, which indicates that the
pin's input path should be configured to be 3.3v-tolerant. Add support
for this.
Note that this is very similar to previous chip's rcv_sel option.
However, since the Tegra TRM names this option differently for the
different chips, we support the new name so that the code exactly matches
the naming in the TRM, to avoid confusion.
This patch incorporates a few fixes from Tom Warren <twarren@nvidia.com>.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/arch/arm/include/asm/arch-tegra/pinmux.h b/arch/arm/include/asm/arch-tegra/pinmux.h
index d87da10..4212e57 100644
--- a/arch/arm/include/asm/arch-tegra/pinmux.h
+++ b/arch/arm/include/asm/arch-tegra/pinmux.h
@@ -63,6 +63,14 @@
};
#endif
+#ifdef TEGRA_PMX_PINS_HAVE_E_IO_HV
+enum pmux_pin_e_io_hv {
+ PMUX_PIN_E_IO_HV_DEFAULT = 0,
+ PMUX_PIN_E_IO_HV_NORMAL,
+ PMUX_PIN_E_IO_HV_HIGH,
+};
+#endif
+
#ifdef TEGRA_PMX_GRPS_HAVE_LPMD
/* Defines a pin group cfg's low-power mode select */
enum pmux_lpmd {
@@ -119,6 +127,9 @@
u32 rcv_sel:2; /* select between High and Normal */
/* VIL/VIH receivers */
#endif
+#ifdef TEGRA_PMX_PINS_HAVE_E_IO_HV
+ u32 e_io_hv:2; /* select 3.3v tolerant receivers */
+#endif
#ifdef TEGRA_PMX_PINS_HAVE_SCHMT
u32 schmt:2; /* schmitt enable */
#endif