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Diffstat (limited to 'arch/arm/mach-tegra/tegra114/funcmux.c')
-rw-r--r--arch/arm/mach-tegra/tegra114/funcmux.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra114/funcmux.c b/arch/arm/mach-tegra/tegra114/funcmux.c
new file mode 100644
index 0000000000..52441c71e6
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra114/funcmux.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2010-2013, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Tegra114 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_GMI:
+ pinmux_set_func(PMUX_PINGRP_GMI_A16_PJ7,
+ PMUX_FUNC_UARTD);
+ pinmux_set_func(PMUX_PINGRP_GMI_A17_PB0,
+ PMUX_FUNC_UARTD);
+ pinmux_set_func(PMUX_PINGRP_GMI_A18_PB1,
+ PMUX_FUNC_UARTD);
+ pinmux_set_func(PMUX_PINGRP_GMI_A19_PK7,
+ PMUX_FUNC_UARTD);
+
+ pinmux_set_io(PMUX_PINGRP_GMI_A16_PJ7, PMUX_PIN_OUTPUT);
+ pinmux_set_io(PMUX_PINGRP_GMI_A17_PB0, PMUX_PIN_INPUT);
+ pinmux_set_io(PMUX_PINGRP_GMI_A18_PB1, PMUX_PIN_INPUT);
+ pinmux_set_io(PMUX_PINGRP_GMI_A19_PK7, PMUX_PIN_OUTPUT);
+
+ pinmux_tristate_disable(PMUX_PINGRP_GMI_A16_PJ7);
+ pinmux_tristate_disable(PMUX_PINGRP_GMI_A17_PB0);
+ pinmux_tristate_disable(PMUX_PINGRP_GMI_A18_PB1);
+ pinmux_tristate_disable(PMUX_PINGRP_GMI_A19_PK7);
+ 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;
+}