diff options
| author | Jonas Schwöbel <jonasschwoebel@yahoo.de> | 2024-01-22 14:40:27 +0200 |
|---|---|---|
| committer | Svyatoslav Ryhel <clamor95@gmail.com> | 2024-10-13 17:20:26 +0300 |
| commit | b515d7ae0de51a26f73b2ddb5ea4db0d95b67d7a (patch) | |
| tree | 4175874c3d99394c16abc7c666f80ff1569b9a96 | |
| parent | 5e13730fc6f562873dc5b8262ffdc0fc43c89cec (diff) | |
Tegra30: Add funcmux for UART over SD slot
Tegra 3 has UART-E exposable via SD card slot which may be
handy for debugging. This change only adds funcmux part, to
use UART-E on the device you additionally would need:
- set stdout-path to serial@70006400 (uarte)
- configure sdmmc1_dat3_py4 and sdmmc1_dat2_py5 pinmux for
uarte
- disable or remove sdhci@7800000 node
- enable CONFIG_TEGRA_ENABLE_UARTE in defconfig
- set CFG_SYS_NS16550_COM to NV_PA_APB_UARTE_BASE in device
header
Signed-off-by: Jonas Schwöbel <jonasschwoebel@yahoo.de>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
| -rw-r--r-- | arch/arm/include/asm/arch-tegra30/funcmux.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/board.c | 2 | ||||
| -rw-r--r-- | drivers/pinctrl/tegra/funcmux-tegra30.c | 16 |
3 files changed, 18 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-tegra30/funcmux.h b/arch/arm/include/asm/arch-tegra30/funcmux.h index 2e8b3359161..05414061a23 100644 --- a/arch/arm/include/asm/arch-tegra30/funcmux.h +++ b/arch/arm/include/asm/arch-tegra30/funcmux.h @@ -16,5 +16,6 @@ enum { /* UART configs */ FUNCMUX_UART1_ULPI = 0, + FUNCMUX_UART5_SDMMC1 = 1, }; #endif /* _TEGRA30_FUNCMUX_H_ */ diff --git a/arch/arm/mach-tegra/board.c b/arch/arm/mach-tegra/board.c index c382e042860..be739c75877 100644 --- a/arch/arm/mach-tegra/board.c +++ b/arch/arm/mach-tegra/board.c @@ -181,7 +181,7 @@ static int uart_configs[] = { -1, -1, -1, - -1, + FUNCMUX_UART5_SDMMC1, /* UARTE */ #elif defined(CONFIG_TEGRA114) -1, -1, diff --git a/drivers/pinctrl/tegra/funcmux-tegra30.c b/drivers/pinctrl/tegra/funcmux-tegra30.c index e31b859beb8..5d3403ae441 100644 --- a/drivers/pinctrl/tegra/funcmux-tegra30.c +++ b/drivers/pinctrl/tegra/funcmux-tegra30.c @@ -33,6 +33,22 @@ int funcmux_select(enum periph_id id, int config) break; } break; + case PERIPH_ID_UART5: + switch (config) { + case FUNCMUX_UART5_SDMMC1: + pinmux_set_func(PMUX_PINGRP_SDMMC1_DAT3_PY4, + PMUX_FUNC_UARTE); + pinmux_set_func(PMUX_PINGRP_SDMMC1_DAT2_PY5, + PMUX_FUNC_UARTE); + + pinmux_set_io(PMUX_PINGRP_SDMMC1_DAT3_PY4, PMUX_PIN_OUTPUT); + pinmux_set_io(PMUX_PINGRP_SDMMC1_DAT2_PY5, PMUX_PIN_INPUT); + + pinmux_tristate_disable(PMUX_PINGRP_SDMMC1_DAT3_PY4); + pinmux_tristate_disable(PMUX_PINGRP_SDMMC1_DAT2_PY5); + break; + } + break; /* Add other periph IDs here as needed */ |