From: Stephen Warren <swar...@nvidia.com>
(In at least some configurations) Whistler uses UART1 on pingroups
UAA, UAB.
Signed-off-by: Stephen Warren <swar...@nvidia.com>
---
arch/arm/cpu/armv7/tegra2/board.c | 14 +++++++++++++-
arch/arm/cpu/armv7/tegra2/funcmux.c | 13 ++++++++++++-
arch/arm/include/asm/arch-tegra2/funcmux.h | 1 +
3 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/armv7/tegra2/board.c
b/arch/arm/cpu/armv7/tegra2/board.c
index a50b1b9..629ad5d 100644
--- a/arch/arm/cpu/armv7/tegra2/board.c
+++ b/arch/arm/cpu/armv7/tegra2/board.c
@@ -101,6 +101,18 @@ int arch_cpu_init(void)
}
#endif
+static int uart_configs[] = {
+#ifdef CONFIG_TEGRA2_UARTA_UAA_UAB
+ FUNCMUX_UART1_UAA_UAB,
+#else
+ FUNCMUX_UART1_IRRX_IRTX,
+#endif
+ FUNCMUX_UART2_IRDA,
+ -1,
+ FUNCMUX_UART4_GMC,
+ -1,
+};
+
/**
* Set up the specified uarts
*
@@ -120,7 +132,7 @@ static void setup_uarts(int uart_ids)
if (uart_ids & (1 << i)) {
enum periph_id id = id_for_uart[i];
- funcmux_select(id, FUNCMUX_DEFAULT);
+ funcmux_select(id, uart_configs[i]);
clock_ll_start_uart(id);
}
}
diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c
b/arch/arm/cpu/armv7/tegra2/funcmux.c
index 0ef7753..e2d1273 100644
--- a/arch/arm/cpu/armv7/tegra2/funcmux.c
+++ b/arch/arm/cpu/armv7/tegra2/funcmux.c
@@ -31,11 +31,22 @@ int funcmux_select(enum periph_id id, int config)
switch (id) {
case PERIPH_ID_UART1:
- if (config == FUNCMUX_UART1_IRRX_IRTX) {
+ switch (config) {
+ case FUNCMUX_UART1_IRRX_IRTX:
pinmux_set_func(PINGRP_IRRX, PMUX_FUNC_UARTA);
pinmux_set_func(PINGRP_IRTX, PMUX_FUNC_UARTA);
pinmux_tristate_disable(PINGRP_IRRX);
pinmux_tristate_disable(PINGRP_IRTX);
+ break;
+ case FUNCMUX_UART1_UAA_UAB:
+ pinmux_set_func(PINGRP_UAA, PMUX_FUNC_UARTA);
+ pinmux_set_func(PINGRP_UAB, PMUX_FUNC_UARTA);
+ pinmux_tristate_disable(PINGRP_UAA);
+ pinmux_tristate_disable(PINGRP_UAB);
+ bad_config = 0;
+ break;
+ }
+ if (!bad_config) {
/*
* Tegra appears to boot with function UARTA pre-
* selected on mux group SDB. If two mux groups are
diff --git a/arch/arm/include/asm/arch-tegra2/funcmux.h
b/arch/arm/include/asm/arch-tegra2/funcmux.h
index ae73c72..b455122 100644
--- a/arch/arm/include/asm/arch-tegra2/funcmux.h
+++ b/arch/arm/include/asm/arch-tegra2/funcmux.h
@@ -30,6 +30,7 @@ enum {
/* UART configs */
FUNCMUX_UART1_IRRX_IRTX = 0,
+ FUNCMUX_UART1_UAA_UAB,
FUNCMUX_UART2_IRDA = 0,
FUNCMUX_UART4_GMC = 0,
--
1.7.0.4
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