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Diffstat (limited to 'arch/arm/mach-tegra/tegra124/funcmux.c')
-rw-r--r--arch/arm/mach-tegra/tegra124/funcmux.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra124/funcmux.c b/arch/arm/mach-tegra/tegra124/funcmux.c
new file mode 100644
index 0000000000..cced787e6b
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra124/funcmux.c
@@ -0,0 +1,71 @@
+/*
+ * (C) Copyright 2013
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/* Tegra124 high-level function multiplexing */
+
+#include <common.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/funcmux.h>
+#include <asm/arch/pinmux.h>
+
+int funcmux_select(enum periph_id id, int config)
+{
+ int bad_config = config != FUNCMUX_DEFAULT;
+
+ switch (id) {
+ case PERIPH_ID_UART4:
+ switch (config) {
+ case FUNCMUX_UART4_GPIO: /* TXD,RXD,CTS,RTS */
+ pinmux_set_func(PMUX_PINGRP_PJ7, PMUX_FUNC_UARTD);
+ pinmux_set_func(PMUX_PINGRP_PB0, PMUX_FUNC_UARTD);
+ pinmux_set_func(PMUX_PINGRP_PB1, PMUX_FUNC_UARTD);
+ pinmux_set_func(PMUX_PINGRP_PK7, PMUX_FUNC_UARTD);
+
+ pinmux_set_io(PMUX_PINGRP_PJ7, PMUX_PIN_OUTPUT);
+ pinmux_set_io(PMUX_PINGRP_PB0, PMUX_PIN_INPUT);
+ pinmux_set_io(PMUX_PINGRP_PB1, PMUX_PIN_INPUT);
+ pinmux_set_io(PMUX_PINGRP_PK7, PMUX_PIN_OUTPUT);
+
+ pinmux_tristate_disable(PMUX_PINGRP_PJ7);
+ pinmux_tristate_disable(PMUX_PINGRP_PB0);
+ pinmux_tristate_disable(PMUX_PINGRP_PB1);
+ pinmux_tristate_disable(PMUX_PINGRP_PK7);
+ break;
+ }
+ break;
+
+ case PERIPH_ID_UART1:
+ switch (config) {
+ case FUNCMUX_UART1_KBC:
+ pinmux_set_func(PMUX_PINGRP_KB_ROW9_PS1,
+ PMUX_FUNC_UARTA);
+ pinmux_set_func(PMUX_PINGRP_KB_ROW10_PS2,
+ PMUX_FUNC_UARTA);
+
+ pinmux_set_io(PMUX_PINGRP_KB_ROW9_PS1, PMUX_PIN_OUTPUT);
+ pinmux_set_io(PMUX_PINGRP_KB_ROW10_PS2, PMUX_PIN_INPUT);
+
+ pinmux_tristate_disable(PMUX_PINGRP_KB_ROW9_PS1);
+ pinmux_tristate_disable(PMUX_PINGRP_KB_ROW10_PS2);
+ break;
+ }
+ break;
+
+ /* Add other periph IDs here as needed */
+
+ default:
+ debug("%s: invalid periph_id %d", __func__, id);
+ return -1;
+ }
+
+ if (bad_config) {
+ debug("%s: invalid config %d for periph_id %d", __func__,
+ config, id);
+ return -1;
+ }
+ return 0;
+}