UART-A can be exposed through uSD, this was tested on Transformer T20 but should work on all Ventana-based boards.
TX is exported on SDD pingroup corresponding to uSD CLK pin RX is exported on SDB which is CMD pin in uSD slot Signed-off-by: Artur Kowalski <[email protected]> --- Changes in v2: - fixed indentation of preprocessor directives arch/arm/include/asm/arch-tegra20/funcmux.h | 1 + arch/arm/mach-tegra/board.c | 2 ++ arch/arm/mach-tegra/tegra20/Kconfig | 3 +++ drivers/pinctrl/tegra/funcmux-tegra20.c | 9 ++++++++- 4 files changed, 14 insertions(+), 1 deletion(-) diff --git a/arch/arm/include/asm/arch-tegra20/funcmux.h b/arch/arm/include/asm/arch-tegra20/funcmux.h index e9e96c1f933..bafcf857620 100644 --- a/arch/arm/include/asm/arch-tegra20/funcmux.h +++ b/arch/arm/include/asm/arch-tegra20/funcmux.h @@ -19,6 +19,7 @@ enum { FUNCMUX_UART1_UAA_UAB, FUNCMUX_UART1_GPU, FUNCMUX_UART1_SDIO1, + FUNCMUX_UART1_SDB_SDD, FUNCMUX_UART2_UAD = 0, FUNCMUX_UART4_GMC = 0, diff --git a/arch/arm/mach-tegra/board.c b/arch/arm/mach-tegra/board.c index 7ca56a3b081..7597034fa48 100644 --- a/arch/arm/mach-tegra/board.c +++ b/arch/arm/mach-tegra/board.c @@ -169,6 +169,8 @@ static int uart_configs[] = { FUNCMUX_UART1_GPU, #elif defined(CONFIG_TEGRA_UARTA_SDIO1) FUNCMUX_UART1_SDIO1, + #elif defined(CONFIG_TEGRA_UARTA_SDB_SDD) + FUNCMUX_UART1_SDB_SDD, #else FUNCMUX_UART1_IRRX_IRTX, #endif diff --git a/arch/arm/mach-tegra/tegra20/Kconfig b/arch/arm/mach-tegra/tegra20/Kconfig index e2735d93e28..3349f1e2786 100644 --- a/arch/arm/mach-tegra/tegra20/Kconfig +++ b/arch/arm/mach-tegra/tegra20/Kconfig @@ -17,6 +17,9 @@ config TEGRA_UARTA_GPU config TEGRA_UARTA_SDIO1 bool +config TEGRA_UARTA_SDB_SDD + bool + choice prompt "Tegra20 board select" optional diff --git a/drivers/pinctrl/tegra/funcmux-tegra20.c b/drivers/pinctrl/tegra/funcmux-tegra20.c index 951ae196161..f60d5aad3a4 100644 --- a/drivers/pinctrl/tegra/funcmux-tegra20.c +++ b/drivers/pinctrl/tegra/funcmux-tegra20.c @@ -62,8 +62,15 @@ int funcmux_select(enum periph_id id, int config) pinmux_tristate_disable(PMUX_PINGRP_SDIO1); bad_config = 0; break; + case FUNCMUX_UART1_SDB_SDD: + pinmux_set_func(PMUX_PINGRP_SDB, PMUX_FUNC_UARTA); + pinmux_set_func(PMUX_PINGRP_SDD, PMUX_FUNC_UARTA); + pinmux_tristate_disable(PMUX_PINGRP_SDB); + pinmux_tristate_disable(PMUX_PINGRP_SDD); + bad_config = 0; + break; } - if (!bad_config) { + if (!bad_config && config != FUNCMUX_UART1_SDB_SDD) { /* * Tegra appears to boot with function UARTA pre- * selected on mux group SDB. If two mux groups are -- 2.48.1
